Elecraft

Re: Announcing the Elecraft K3 Transceiver: 10/100W, 160-6m

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Dave-Boat Guy

Re: Announcing the Elecraft K3 Transceiver: 10/100W, 160-6m

Congratulations on the introduction of the K3! I am a
fan of Elecraft but I won't be buying a K3. Our K2
still has some recognized defects that haven't been
addressed in over 6000 units and almost 10 years of
production. Although the K3 seems to take into
account a lot of the comments we've made over the
years, it looks like it is jumping on the SDR
bandwagon. If any of you have followed the Software
Defined Radio Bandwagon, as it applies to "amateur
radio" developments, it simply means that the radio
manufacturers are more willing to put out a
"half-baked" radio than to commit to thoroughly
testing a radio. Flex Radio and Ten Tec have tried to
take the approach telling us that we won't need to
replace hardware for a long time since the software
can be updated to take into account new features. All
I've seen is that the manufacturers who pursue this
route take advantage of reprogrammability to fix their
own problems at a later date. By the time the
problems are solved, technology has improved and a new
piece of hardware becomes available and support for
the older equipment dwindles. Both of those companies
have obsoleted their initial releases in 3 or 4 years.

Perhaps the modular approach taken by Elecraft in the
K3 is the way to go. I for one am curious if they are
still using MicroChip PIC's, which are way too slow,
or if they have chosen a real processor. I really
would like to be happy about this new radio but with
OUR K2's issues still unresolved, it makes me wonder
if it is worth spending almost $3000 to take a chance.
Perhaps it is better to play it safe and go with a
tried and true ICOM Pro3 or even a Yaesu FT2000.

Good luck.

Dave-

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N2EY

Re: Announcing the Elecraft K3 Transceiver: 10/100W, 160-6m

Before I say anything else:

WOW!!!!!

In a message dated 4/28/07 9:27:07 AM Eastern Daylight Time,
[hidden email] writes:

> Perhaps the modular approach taken by Elecraft in the
> K3 is the way to go.

Of course. I suspect that one of the servicing options of the K3 will be to
send defective modules to Aptos instead of complete rigs.

I for one am curious if they are
>
> still using MicroChip PIC's, which are way too slow,
> or if they have chosen a real processor.

Too slow for what? My K2's control system is plenty fast enough for what it
does.

IIRC, one of the design criteria for the K1, K2 and KX1 was low power demand,
and the controllers were selected in large part for low power requirements.
The choice was based on what was available when the rigs were designed. The K2
design is almost ten years old - what "real processors" were available then
that had low power drain and could be had in limited quantity for reasonable
prices?

--

Every rig design is a compromise - even the K3. Every rig has bugs in it, too
- even the K3. If you want a modern rig to be tested and revised until all
the bugs are out, be prepared to wait *years* and spend much bigger bucks than
what most ham rigs cost.

73 de Jim, N2EY

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wayne burdick

Is the K3 jumping onto "the SDR Bandwagon"? No....

Administrator

In reply to this post by Dave-Boat Guy

Dave,

I fully understand your concerns here. This is an issue we had planned
to address anyway.

The K3 has "software-defined" features in the sense that the DSP is
very easily upgradeable (one-click PC application), and powerful, and
can handle future operating modes or signal processing tasks. It also
has a huge amount of flash memory for filter parameter storage. Thus we
may be able to do very interesting things in the future such as
auto-tuning of SSB signals, syllabic squelch, DSP noise blanking with
signal restoration, etc.

We hope to incorporate ideas from K3 owners over time, given this
flexibility. But all features that are available at time of shipment
will be very stable, and we won't be depending on the programming
community to "fix" anything. We'll retain close control over the source
code for both the DSP and the main microcontroller to ensure high
quality.

Regarding the microcontroller:

The K3's MCU is the largest and fastest in Microchip's line, and I can
assure you it is not "way too slow". It runs at 4.5 times the speed of
the K2's MCU. If a radio with this MCU running at this speed were to
appear "slow" to the operator, it would be the programmer's fault, not
the MCU's. In the case of the K3, we can simultaneously handle 38.4 kB
RS232 I/O; internal CW keying at 50 WPM; rapid update of the LCD; full
decode and display of PSK31/CW/RTTY text; and a continuous, rich
interaction between the MCU and DSP. There is no horsepower limitation
here!

The MCU is supplemented by a very large flash memory on the front
panel, providing a huge amount of help text and table storage, and
leaving plenty of ROM for all foreseen upgrades.

I realize that our competition is using PC cores in their radios. These
have several major disadvantages compared to our Microchip MCU:

- embedded PCs have much higher current drain (our entire radio can
draw as little as 0.8 amps,
vs. 2 to 3 amps for other high-performance rigs)

- embedded PCs may have very slow boot-up times (the K3 turns on in
less than 1 second; I believe
at least one of our competitor's rigs takes 11 seconds because it
has to
boot a Microsoft operating system!)

- embedded PCs and their support ICs generate much more RFI (our
entire MCU subsystems draws
something like 20-30 mA, dramatically reducing both conducted and
radiated emissions, and thus
simplifying shielding requirements)

- embedded PCs have much greater cost and complexity (our choice of
MCU is one reason we can
offer an extremely competitive radio starting at well under $2000)

As you may know, writing firmware for a microcontroller is vastly
different from writing code for a PC. I prefer the former, and I've
been doing it since I was 18. Lyle's been writing DSP code since there
were such things ;)

Regarding the K2:

We've learned a lot from developing and supporting the K2. Everything
we've learned is reflected in the K3, where we've had the luxury of a
larger enclosure, I.F. DSP, larger MCU, more front panel space, more
I/O, higher pricetag, etc. And the K3 was designed from the ground up
to use surface-mount parts everywhere possible to minimize
manufacturing costs.

The K2 is an ongoing product that we'll be updating as time permits. As
you may know, we're not a large company, so our engineering resources
will be stretched at times.

Please send me directly any suggestions for K2 improvements. I maintain
this list, prioritizing task items based on the needs of current and
future K2 owners.

Thanks for sharing your views on these topics!

73,
Wayne
N6KR

Dave-Boat Guy wrote:

> Although the K3 seems to take into
> account a lot of the comments we've made over the
> years, it looks like it is jumping on the SDR
> bandwagon. If any of you have followed the Software
> Defined Radio Bandwagon, as it applies to "amateur
> radio" developments, it simply means that the radio
> manufacturers are more willing to put out a
> "half-baked" radio than to commit to thoroughly
> testing a radio. Flex Radio and Ten Tec have tried to
> take the approach telling us that we won't need to
> replace hardware for a long time since the software
> can be updated to take into account new features. All
> I've seen is that the manufacturers who pursue this
> route take advantage of reprogrammability to fix their
> own problems at a later date. By the time the
> problems are solved, technology has improved and a new
> piece of hardware becomes available and support for
> the older equipment dwindles. Both of those companies
> have obsoleted their initial releases in 3 or 4 years.
>
> Perhaps the modular approach taken by Elecraft in the
> K3 is the way to go. I for one am curious if they are
> still using MicroChip PIC's, which are way too slow,
> or if they have chosen a real processor....

---

http://www.elecraft.com

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Bill Coleman-2

K2 Improvement Ideas

On Apr 28, 2007, at 12:45 PM, wayne burdick wrote:

> Please send me directly any suggestions for K2 improvements. I
> maintain this list, prioritizing task items based on the needs of
> current and future K2 owners.

OK, you asked for it....

I'm certainly going to buy a K3, when I can afford it, which may be a
while. I do have several suggestions for the K2, which is going to
remain a very fine and capable radio:

Firmware Only Enhancements:

1) RTTY Mark Frequency Display. Like the CW mode displays the
frequency of the received CW signal, the RTTY mode ought to display
the frequency of the Mark signal. A menu option would be needed to
set the frequency of the Mark signal. (This would essentially
subtract or add the Mark frequency from the LSB/USB carrier
frequency, respectively)

2) Option for VOX to toggle VOX on / off only. Delay is set in a menu
option. (Beats having to cycle through all delay times to turn on /
off, which I do frequently)

3) Menu settings for default tuning rate for each mode (CW, USB/LSB,
RTTY). I currently find myself constantly switching between 10 Hz and
50 Hz whenever I change modes.

4) Unified Filters - Have three or four filter presets for each mode
that are combinations of an XFIL and DSP setting values. Allow one
button (such as XFIL) to cycle through the presets. This would allow
easier manipulation of the two sets of filters, rather than having to
tap and hold the same button to get things in sync. (Made even harder
because you can't see which filter is currently selected)

5) IF Shift - replace XIT mode with IF Shift. RIT takes priority over
the control if on. Either that, or control IF Shift with the Keyer
speed control (at least in USB/LSB, RTTY). Or perhaps hold down XIT
and rotate tuning dial.

6) Option to flip CW sidebands on 15m and up so tuning direction
stays the same.

7) Computer command to set the contents of the CW memories -- so you
can program them from a PC program and then run them from the front
panel.

8) New INP mode that would allow PTT on the dot line and CW keying on
the dash line for contesting work. (No auto-detect of hand keying in
this mode)

9) Have a mode for variable rate tuning -- normal tuning is one step
at a time, but as you turn the knob faster, the tuning rate increases
so long as you tune quickly. (A similar technology is used to
accelerate mouse movement and has been on the Mac for over two decades)

10) Option for one-touch selection of Tuner AUTO/CAL (eg out)
selection. This would allow one to easily switch the tuner on and off.

Hardware Improvements:

1) Improved KSB2 module -- filter with sharper skirts (better than
1.5 shape factor), more (6-10 dB) mic gain available, more positive
VOX (using separate VOX amplifier), anti-VOX circuitry.

2) Improved KNB2 -- allow selection of longer blanking times, more
thresholds, better blanking action.

3) PFx Module -- teeny little module that has four (or so) buttons.
Hooks into AUX line and offers access to eight functions of the K2
(four for tap, four for hold) Obviates the need for FPLY, opens the
K2 up for easier access to things like switching filter presets,
noise reduction modes, RIT clear. Lots simpler and cheaper than the
KRC2 because it is just the buttons. (Might also be useful for the K3)

4) Remote Tuning Knob -- borrow the idea from Ten-Tec. Perhaps part
of PFx module.

Bill Coleman, AA4LR, PP-ASEL Mail: [hidden email]
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901

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n6wg

Re: K2 Improvement Ideas--Adding on

Bill
I'd like to add to your list the ability to have the
KAT2 autotuner be active on one antenna port
and be bypassed on the other.

I have some antennas that require the autotuner
for a match, and others that are already a good
match as they are.

I'd also like to see an improvement in the cw crystal filter
to improve the signal suppression outside the filter
passband.

73, Bob N6WG

----- Original Message -----
From: "Bill Coleman" <[hidden email]>
To: "wayne burdick" <[hidden email]>
Cc: "Elecraft" <[hidden email]>
Sent: Thursday, May 03, 2007 8:32 PM
Subject: [Elecraft] K2 Improvement Ideas

>
> On Apr 28, 2007, at 12:45 PM, wayne burdick wrote:
>
> > Please send me directly any suggestions for K2 improvements. I
> > maintain this list, prioritizing task items based on the needs of
> > current and future K2 owners.
>
> OK, you asked for it....
>
> I'm certainly going to buy a K3, when I can afford it, which may be a
> while. I do have several suggestions for the K2, which is going to
> remain a very fine and capable radio:
>
> Firmware Only Enhancements:
>
> 1) RTTY Mark Frequency Display. Like the CW mode displays the
> frequency of the received CW signal, the RTTY mode ought to display
> the frequency of the Mark signal. A menu option would be needed to
> set the frequency of the Mark signal. (This would essentially
> subtract or add the Mark frequency from the LSB/USB carrier
> frequency, respectively)
>
> 2) Option for VOX to toggle VOX on / off only. Delay is set in a menu
> option. (Beats having to cycle through all delay times to turn on /
> off, which I do frequently)
>
> 3) Menu settings for default tuning rate for each mode (CW, USB/LSB,
> RTTY). I currently find myself constantly switching between 10 Hz and
> 50 Hz whenever I change modes.
>
> 4) Unified Filters - Have three or four filter presets for each mode
> that are combinations of an XFIL and DSP setting values. Allow one
> button (such as XFIL) to cycle through the presets. This would allow
> easier manipulation of the two sets of filters, rather than having to
> tap and hold the same button to get things in sync. (Made even harder
> because you can't see which filter is currently selected)
>
> 5) IF Shift - replace XIT mode with IF Shift. RIT takes priority over
> the control if on. Either that, or control IF Shift with the Keyer
> speed control (at least in USB/LSB, RTTY). Or perhaps hold down XIT
> and rotate tuning dial.
>
> 6) Option to flip CW sidebands on 15m and up so tuning direction
> stays the same.
>
> 7) Computer command to set the contents of the CW memories -- so you
> can program them from a PC program and then run them from the front
> panel.
>
> 8) New INP mode that would allow PTT on the dot line and CW keying on
> the dash line for contesting work. (No auto-detect of hand keying in
> this mode)
>
> 9) Have a mode for variable rate tuning -- normal tuning is one step
> at a time, but as you turn the knob faster, the tuning rate increases
> so long as you tune quickly. (A similar technology is used to
> accelerate mouse movement and has been on the Mac for over two decades)
>
> 10) Option for one-touch selection of Tuner AUTO/CAL (eg out)
> selection. This would allow one to easily switch the tuner on and off.
>
>
> Hardware Improvements:
>
> 1) Improved KSB2 module -- filter with sharper skirts (better than
> 1.5 shape factor), more (6-10 dB) mic gain available, more positive
> VOX (using separate VOX amplifier), anti-VOX circuitry.
>
> 2) Improved KNB2 -- allow selection of longer blanking times, more
> thresholds, better blanking action.
>
> 3) PFx Module -- teeny little module that has four (or so) buttons.
> Hooks into AUX line and offers access to eight functions of the K2
> (four for tap, four for hold) Obviates the need for FPLY, opens the
> K2 up for easier access to things like switching filter presets,
> noise reduction modes, RIT clear. Lots simpler and cheaper than the
> KRC2 because it is just the buttons. (Might also be useful for the K3)
>
> 4) Remote Tuning Knob -- borrow the idea from Ten-Tec. Perhaps part
> of PFx module.
>
> Bill Coleman, AA4LR, PP-ASEL Mail: [hidden email]
> Quote: "Not within a thousand years will man ever fly!"
> -- Wilbur Wright, 1901
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com

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wayne burdick

Re: K2 Improvement Ideas

Administrator

In reply to this post by Bill Coleman-2

Great list, Bill -- thanks!

Wayne

On May 3, 2007, at 8:32 PM, Bill Coleman wrote:

>
> On Apr 28, 2007, at 12:45 PM, wayne burdick wrote:
>
>> Please send me directly any suggestions for K2 improvements. I
>> maintain this list, prioritizing task items based on the needs of
>> current and future K2 owners.
>
> OK, you asked for it....

---

http://www.elecraft.com

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Tom Zeltwanger

Re: K2 Improvement Ideas

In reply to this post by Bill Coleman-2

Bill,

That was an outstanding post. I have only been using the K2 for a few months,
and the KAT100 for a couple weeks, and I already want many of the things on
your list.

I especially agree that some enhancements to the tuning raes would be nice. I
am constantly switching between rates, and wishing for variable speed tuning,
or some additional rates in between the existing ones.

I would also like a CW contester's keypad. Something I could sit next to my
key, and get access to all the CW memories, filter selection, RIT, tuning, and
a few other functions. In fact, I may build one, but I'm sure something from
the factory would be better matched to the rig. If others are interested in
something like this, please let me know.

73,

Tom KG3V

Quoting Bill Coleman <[hidden email]>:

Don Wilhelm-3

Re: K2 Improvement Ideas--Adding on

In reply to this post by n6wg

Bob,

I see no real need for a bypass on just one of the tuner antenna jacks.
In my mind it is already there, but better - just do a TUNE once on each
band where your antenna is resonant and the K2 will remember - I regard
that as better than a bypass function.

73,
Don W3FPR

Robert Tellefsen wrote:

> Bill
> I'd like to add to your list the ability to have the
> KAT2 autotuner be active on one antenna port
> and be bypassed on the other.
>
> I have some antennas that require the autotuner
> for a match, and others that are already a good
> match as they are.
>
> I'd also like to see an improvement in the cw crystal filter
> to improve the signal suppression outside the filter
> passband.
>
> 73, Bob N6WG

n6wg

Re: K2 Improvement Ideas--Adding on

Hi Don
Yes, if there were only two antennas, that
would work., and I've done that. However,
I have more than that, some connected to a
rotary switch outboard to the K2.
When I switch them, I don't want to
retune the ATU with each new antenna I
connect, as I'm often switching to find the
best signal for a station I'm trying to work.
Some antennas present a nice 50 ohm match
as they are, and some don't. I'd like to put
the 50 ohm matches all together on one
port and those that need matching on the
other port.
I'm still trying to get to the point where all
the antennas are 50 ohms at the switch, and
then it wouldn't matter. But it ain't easy :-)

73, Bob N6WG

----- Original Message -----
From: "Don Wilhelm" <[hidden email]>
To: "Robert Tellefsen" <[hidden email]>
Cc: "Bill Coleman" <[hidden email]>; "wayne burdick" <[hidden email]>;
"Elecraft" <[hidden email]>
Sent: Friday, May 04, 2007 5:14 AM
Subject: Re: [Elecraft] K2 Improvement Ideas--Adding on

> Bob,
>
> I see no real need for a bypass on just one of the tuner antenna jacks.
> In my mind it is already there, but better - just do a TUNE once on each
> band where your antenna is resonant and the K2 will remember - I regard
> that as better than a bypass function.
>
>
> 73,
> Don W3FPR
>
> Robert Tellefsen wrote:
> > Bill
> > I'd like to add to your list the ability to have the
> > KAT2 autotuner be active on one antenna port
> > and be bypassed on the other.
> >
> > I have some antennas that require the autotuner
> > for a match, and others that are already a good
> > match as they are.
> >
> > I'd also like to see an improvement in the cw crystal filter
> > to improve the signal suppression outside the filter
> > passband.
> >
> > 73, Bob N6WG

David Cutter

Re: K2 Improvement Ideas: ext keypad

In reply to this post by Tom Zeltwanger

G3PJT had a lashed up external keypad of some sort for one of his K2's. He
showed it at the RSGB HF Convention last year.

Perhaps if Bob reads this he will jump in.

David

G3UNA

----- Original Message -----
From: "Tom Zeltwanger" <[hidden email]>
To: "Bill Coleman" <[hidden email]>
Cc: "Elecraft" <[hidden email]>
Sent: Friday, May 04, 2007 1:12 PM
Subject: Re: [Elecraft] K2 Improvement Ideas

>
> Bill,
>
> That was an outstanding post. I have only been using the K2 for a few
> months,
> and the KAT100 for a couple weeks, and I already want many of the things
> on
> your list.
>
> I especially agree that some enhancements to the tuning raes would be
> nice. I
> am constantly switching between rates, and wishing for variable speed
> tuning,
> or some additional rates in between the existing ones.
>
> I would also like a CW contester's keypad. Something I could sit next to
> my
> key, and get access to all the CW memories, filter selection, RIT, tuning,
> and
> a few other functions. In fact, I may build one, but I'm sure something
> from
> the factory would be better matched to the rig. If others are interested
> in
> something like this, please let me know.
>
> 73,
>
> Tom KG3V
>
>
> Quoting Bill Coleman <[hidden email]>:
>
>>
>> On Apr 28, 2007, at 12:45 PM, wayne burdick wrote:
>>
>> > Please send me directly any suggestions for K2 improvements. I
>> > maintain this list, prioritizing task items based on the needs of
>> > current and future K2 owners.
>>
>> OK, you asked for it....
>>
>> I'm certainly going to buy a K3, when I can afford it, which may be a
>> while. I do have several suggestions for the K2, which is going to
>> remain a very fine and capable radio:
>>
>> Firmware Only Enhancements:
>>
>> 1) RTTY Mark Frequency Display. Like the CW mode displays the
>> frequency of the received CW signal, the RTTY mode ought to display
>> the frequency of the Mark signal. A menu option would be needed to
>> set the frequency of the Mark signal. (This would essentially
>> subtract or add the Mark frequency from the LSB/USB carrier
>> frequency, respectively)
>>
>> 2) Option for VOX to toggle VOX on / off only. Delay is set in a menu
>> option. (Beats having to cycle through all delay times to turn on /
>> off, which I do frequently)
>>
>> 3) Menu settings for default tuning rate for each mode (CW, USB/LSB,
>> RTTY). I currently find myself constantly switching between 10 Hz and
>> 50 Hz whenever I change modes.
>>
>> 4) Unified Filters - Have three or four filter presets for each mode
>> that are combinations of an XFIL and DSP setting values. Allow one
>> button (such as XFIL) to cycle through the presets. This would allow
>> easier manipulation of the two sets of filters, rather than having to
>> tap and hold the same button to get things in sync. (Made even harder
>> because you can't see which filter is currently selected)
>>
>> 5) IF Shift - replace XIT mode with IF Shift. RIT takes priority over
>> the control if on. Either that, or control IF Shift with the Keyer
>> speed control (at least in USB/LSB, RTTY). Or perhaps hold down XIT
>> and rotate tuning dial.
>>
>> 6) Option to flip CW sidebands on 15m and up so tuning direction
>> stays the same.
>>
>> 7) Computer command to set the contents of the CW memories -- so you
>> can program them from a PC program and then run them from the front
>> panel.
>>
>> 8) New INP mode that would allow PTT on the dot line and CW keying on
>> the dash line for contesting work. (No auto-detect of hand keying in
>> this mode)
>>
>> 9) Have a mode for variable rate tuning -- normal tuning is one step
>> at a time, but as you turn the knob faster, the tuning rate increases
>> so long as you tune quickly. (A similar technology is used to
>> accelerate mouse movement and has been on the Mac for over two decades)
>>
>> 10) Option for one-touch selection of Tuner AUTO/CAL (eg out)
>> selection. This would allow one to easily switch the tuner on and off.
>>
>>
>> Hardware Improvements:
>>
>> 1) Improved KSB2 module -- filter with sharper skirts (better than
>> 1.5 shape factor), more (6-10 dB) mic gain available, more positive
>> VOX (using separate VOX amplifier), anti-VOX circuitry.
>>
>> 2) Improved KNB2 -- allow selection of longer blanking times, more
>> thresholds, better blanking action.
>>
>> 3) PFx Module -- teeny little module that has four (or so) buttons.
>> Hooks into AUX line and offers access to eight functions of the K2
>> (four for tap, four for hold) Obviates the need for FPLY, opens the
>> K2 up for easier access to things like switching filter presets,
>> noise reduction modes, RIT clear. Lots simpler and cheaper than the
>> KRC2 because it is just the buttons. (Might also be useful for the K3)
>>
>> 4) Remote Tuning Knob -- borrow the idea from Ten-Tec. Perhaps part
>> of PFx module.
>>
>> Bill Coleman, AA4LR, PP-ASEL Mail: [hidden email]
>> Quote: "Not within a thousand years will man ever fly!"
>> -- Wilbur Wright, 1901
>>
>> _______________________________________________
>> Elecraft mailing list
>> Post to: [hidden email]
>> You must be a subscriber to post to the list.
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Don Wilhelm-3

Re: K2 Improvement Ideas--Adding on

In reply to this post by n6wg

Bob,

I think you may be a candidate for the KRC2 and an array of relays for
your antenna switching tasks. It can work great. When I have all the
work on my system completed I will switching a total of 13 antennas with
mine - the tuner just trims up the match a bit when needed.

If you have 2 banks of antennas (1 bank tuned and the other presenting
50 ohms), the KRC2 can select the proper antennas for each band and the
ANT1/2 button selects between the 2 antennas for each band - If you have
more than 2 antennas on any band the KRC2 F4 button can be used to turn
on the AC1 thru AC3 lines which can be used in conjuction with the
normal band select outputs to select additional antennas - I find it
much more sensible and automatic than antenna switches.

73,
Don W3FPR

Robert Tellefsen wrote:

> Hi Don
> Yes, if there were only two antennas, that
> would work., and I've done that. However,
> I have more than that, some connected to a
> rotary switch outboard to the K2.
> When I switch them, I don't want to
> retune the ATU with each new antenna I
> connect, as I'm often switching to find the
> best signal for a station I'm trying to work.
> Some antennas present a nice 50 ohm match
> as they are, and some don't. I'd like to put
> the 50 ohm matches all together on one
> port and those that need matching on the
> other port.
> I'm still trying to get to the point where all
> the antennas are 50 ohms at the switch, and
> then it wouldn't matter. But it ain't easy :-)
>
> 73, Bob N6WG
>
> ----- Original Message -----
> From: "Don Wilhelm" <[hidden email]>
> To: "Robert Tellefsen" <[hidden email]>
> Cc: "Bill Coleman" <[hidden email]>; "wayne burdick" <[hidden email]>;
> "Elecraft" <[hidden email]>
> Sent: Friday, May 04, 2007 5:14 AM
> Subject: Re: [Elecraft] K2 Improvement Ideas--Adding on
>
>
>> Bob,
>>
>> I see no real need for a bypass on just one of the tuner antenna jacks.
>> In my mind it is already there, but better - just do a TUNE once on each
>> band where your antenna is resonant and the K2 will remember - I regard
>> that as better than a bypass function.
>>
>>
>> 73,
>> Don W3FPR
>>
>> Robert Tellefsen wrote:
>>> Bill
>>> I'd like to add to your list the ability to have the
>>> KAT2 autotuner be active on one antenna port
>>> and be bypassed on the other.
>>>
>>> I have some antennas that require the autotuner
>>> for a match, and others that are already a good
>>> match as they are.
>>>
>>> I'd also like to see an improvement in the cw crystal filter
>>> to improve the signal suppression outside the filter
>>> passband.
>>>
>>> 73, Bob N6WG
>
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>

Vic K2VCO

Re: K2 Improvement Ideas--Adding on

Don Wilhelm wrote:

> If you have 2 banks of antennas (1 bank tuned and the other presenting
> 50 ohms), the KRC2 can select the proper antennas for each band and the
> ANT1/2 button selects between the 2 antennas for each band - If you have
> more than 2 antennas on any band the KRC2 F4 button can be used to turn
> on the AC1 thru AC3 lines which can be used in conjuction with the
> normal band select outputs to select additional antennas - I find it
> much more sensible and automatic than antenna switches.

I must be missing something. Let's say the KRC2 is operating a relay box
connected to port 1. Then it will select an antenna for each band (we'll
assume that these are the tuned antennas).

You can connect ONE other antenna to port 2. Unless you have two relay
boxes, which I guess is possible.

Were you thinking of something else? I have a KRC2 and a KAT100 and have
been thinking about the most effective way to use them.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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Dan Barker

RE: K2 Improvement Ideas--Adding on

You can tune the AT into a dummy load (on ANT2, let's say), and then not
tune it to the antenna ever. Then, if you are on ANT1, the tuner will use
it's remembered settings for that band and antenna. If you switch to ANT2,
the tuner will use it's remembered settings for the band and dummy load
(which is the same as bypass for all intents and purposes).

Actually, it may BE the same. I'd have to check the relay settings for POUT
vs tuned to a 50 ohm load, but they might be the same. Anyone know?

Dan / WG4S / K2 #2456

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]]On Behalf Of Vic K2VCO
Sent: Friday, May 04, 2007 11:45 AM
To: [hidden email]
Cc: Elecraft
Subject: Re: [Elecraft] K2 Improvement Ideas--Adding on

Don Wilhelm wrote:

> If you have 2 banks of antennas (1 bank tuned and the other presenting
> 50 ohms), the KRC2 can select the proper antennas for each band and the
> ANT1/2 button selects between the 2 antennas for each band - If you have
> more than 2 antennas on any band the KRC2 F4 button can be used to turn
> on the AC1 thru AC3 lines which can be used in conjuction with the
> normal band select outputs to select additional antennas - I find it
> much more sensible and automatic than antenna switches.

I must be missing something. Let's say the KRC2 is operating a relay box
connected to port 1. Then it will select an antenna for each band (we'll
assume that these are the tuned antennas).

You can connect ONE other antenna to port 2. Unless you have two relay
boxes, which I guess is possible.

Were you thinking of something else? I have a KRC2 and a KAT100 and have
been thinking about the most effective way to use them.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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Don Wilhelm-3

Re: K2 Improvement Ideas--Adding on

In reply to this post by Vic K2VCO

Vic,

Yes, two relay boxes (actually I am using 4 in total - it may expand to
5 sometime).

The KRC2 can switch multiple relay boxes - switch both boxes for any one
band and then select between the relay boxes with the ANT1/2 selection.

In fact, with the KRC2 there are both positive active (external power
supply) and negative acting (grounded when active), so these outputs can
be combined logically by simply wiring them together - logical OR as
well as logical AND functions can be created. The KRC2 is truly a
versatile relay controller.

73,
Don W3FPR

Vic K2VCO wrote:

> Don Wilhelm wrote:
>
>> If you have 2 banks of antennas (1 bank tuned and the other presenting
>> 50 ohms), the KRC2 can select the proper antennas for each band and
>> the ANT1/2 button selects between the 2 antennas for each band - If
>> you have more than 2 antennas on any band the KRC2 F4 button can be
>> used to turn on the AC1 thru AC3 lines which can be used in conjuction
>> with the normal band select outputs to select additional antennas - I
>> find it much more sensible and automatic than antenna switches.
>
> I must be missing something. Let's say the KRC2 is operating a relay box
> connected to port 1. Then it will select an antenna for each band (we'll
> assume that these are the tuned antennas).
>
> You can connect ONE other antenna to port 2. Unless you have two relay
> boxes, which I guess is possible.
>
> Were you thinking of something else? I have a KRC2 and a KAT100 and have
> been thinking about the most effective way to use them.

Bill Coleman-2

Re: K2 Improvement Ideas

In reply to this post by Tom Zeltwanger

On May 4, 2007, at 8:12 AM, Tom Zeltwanger wrote:

> That was an outstanding post.

Thanks.

> I have only been using the K2 for a few months,
> and the KAT100 for a couple weeks, and I already want many of the
> things on
> your list.

I've been using the K2 as my main rig since spring of 2002. It really
is a great radio. There's only a few shortcomings.

> I especially agree that some enhancements to the tuning raes would
> be nice. I
> am constantly switching between rates, and wishing for variable
> speed tuning,
> or some additional rates in between the existing ones.

10 Hz is fine for CW and RTTY. A bit faster tuning is needed for SSB,
50 Hz works OK, since that is 4.8 kHz per revolution of the knob.

> I would also like a CW contester's keypad. Something I could sit
> next to my
> key, and get access to all the CW memories, filter selection, RIT,
> tuning, and
> a few other functions.

Yup, that's what I had in mind with the PFn module. While for most
contesting, I don't use FPLY -- I have the computer do the sending.
But DXing and some light contesting I'll use FPLY to access the
memories. I'm always forgetting and then I end up sending something
instead of doing the function I want. Dedicated keys would be nice.

> In fact, I may build one, but I'm sure something from
> the factory would be better matched to the rig. If others are
> interested in
> something like this, please let me know.

The tricky part would be in not defacing the front panel board. You'd
want to come in through the AUXBUS. Since the protocol isn't
published, it really has to come from Elecraft.

Bill Coleman, AA4LR, PP-ASEL Mail: [hidden email]
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901

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Bill Coleman-2

Re: K2 Improvement Ideas--Adding on

In reply to this post by n6wg

On May 4, 2007, at 12:14 AM, Robert Tellefsen wrote:

> I'd also like to see an improvement in the cw crystal filter
> to improve the signal suppression outside the filter
> passband.

I'm pretty happy with the CW filter. It has good suppression outside
the passband for me -- although I'm considering making a couple of
bypass cap mods to improve this. I think KI6WX published a mod that
involved a half-dozen chip capacitors.

Bill Coleman, AA4LR, PP-ASEL Mail: [hidden email]
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901

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Bill Coleman-2

Re: K2 Improvement Ideas--Adding on

In reply to this post by Don Wilhelm-3

On May 4, 2007, at 8:14 AM, Don Wilhelm wrote:

> In my mind it is already there, but better - just do a TUNE once on
> each band where your antenna is resonant and the K2 will remember -
> I regard that as better than a bypass function.

The one thing that gets me with this is that if something happens to
your antenna, you might not notice, especially if you have more than
one antenna on each port and you press the Tune button after
switching bands. The rig will be happy even if the antenna is partly
busted.

Bill Coleman, AA4LR, PP-ASEL Mail: [hidden email]
Quote: "Not within a thousand years will man ever fly!"
-- Wilbur Wright, 1901

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n6wg

Re: K2 Improvement Ideas--Adding on

In reply to this post by Bill Coleman-2

True, but I seem to recall he decided the
return on the effort involved wasn't worth
it.
73, Bob N6WG

----- Original Message -----
From: "Bill Coleman" <[hidden email]>
To: "Robert Tellefsen" <[hidden email]>
Cc: "wayne burdick" <[hidden email]>; "Elecraft"
<[hidden email]>
Sent: Friday, May 04, 2007 5:05 PM
Subject: Re: [Elecraft] K2 Improvement Ideas--Adding on

>
> On May 4, 2007, at 12:14 AM, Robert Tellefsen wrote:
>
> > I'd also like to see an improvement in the cw crystal filter
> > to improve the signal suppression outside the filter
> > passband.
>
> I'm pretty happy with the CW filter. It has good suppression outside
> the passband for me -- although I'm considering making a couple of
> bypass cap mods to improve this. I think KI6WX published a mod that
> involved a half-dozen chip capacitors.
>
> Bill Coleman, AA4LR, PP-ASEL Mail: [hidden email]
> Quote: "Not within a thousand years will man ever fly!"
> -- Wilbur Wright, 1901
>

Nigel & Beryl Hayton

Re: K2 Improvement Ideas

In reply to this post by Bill Coleman-2

I would like to see the ability to toggle or step through say three side
tone settings and have the CW filters automatically track the changes.
On a occasions, especially when the filter is set narrow and the signal is
weak, the filter ringing and the background noise level can mask a
particular sidetone frequency. Being able to change the CW sidetone can
again un-mask the signal.

73, Nigel ZL2DF

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drewko

Re: K2 Improvement Ideas

I had been thinking about having a filter parameter memory card, where
you could store the bandwidth/bfo figures from a number of different
alignments and instantly recall and load them. Say you had five banks,
you could have four bandwidths at each of five different
sidetone/offsets. But I don't know enough about this to know why even
this limited option (let alone continuously tracking filters) wouldn't
be practical.

73,
Drew
AF2Z

On Tue, 08 May 2007 22:21:04 +1200, "Nigel & Beryl"
<[hidden email]> wrote:

>I would like to see the ability to toggle or step through say three side
>tone settings and have the CW filters automatically track the changes.
>On a occasions, especially when the filter is set narrow and the signal is
>weak, the filter ringing and the background noise level can mask a
>particular sidetone frequency. Being able to change the CW sidetone can
>again un-mask the signal.
>
>73, Nigel ZL2DF
>

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