Announcing the Elecraft K3 Transceiver: 10/100W, 160-6m, Assembled or Kit

[wayne burdick]

Greetings!

This afternoon at the DX Convention in Visalia, CA, we unveiled a new
top-of-the-line transceiver -- the Elecraft K3. This is the culmination
of three years of design, test, and refinement, and we believe the K3
will set a new standard for performance and value in its class. It has
features and performance comparable to present radios ranging from
$4000 to $12000.

(We'd like to thank the many surprised convention attendees. What they
all said boils down to something like "Yes!")

A full K3 web page will be set up by Monday, complete with order form
and other details. Meanwhile, please take a look at the temporary page:

     http://www.elecraft.com/K3

Among other things, you'll find a very high-resolution front panel
photo (as well as other photos):

     http://www.elecraft.com/K3/K3_big_v2.jpg

And the K3 data sheet:

     http://www.elecraft.com/K3/K3_Data%20Sheet_rev06.pdf

There's also an order form that could be printed and mailed, but
sometime on Monday the on-line order page will be up and running, which
is the preferred method.

As explained on the order form, you can reserve a K3 now for initial
shipments in July. A 50% deposit is requested if you'd like to secure
one of the first 200 production units (serial numbers 20-220,
probably).

Here's a quick summary of the K3's specs:

   - K3/100 and K3/10 models (the K3/10 can be upgraded very easily,
internally, to a K3/100)

   - Basic K3 price ranges from $1399 to $1989 depending on whether you
start with the
     10-watt or 100-watt model, and whether you choose factory assembled
or
     modular, no-soldering, kit (this is the subject of the next email).

   - Desktop/portable size:  4"H x 10"W x 10"D (10 x 25 x 25 cm) --
optimized for both
     home and travel use

   - All modes (SSB, CW, DATA, AM, FM, plus AM-sync receive, and
built-in PSK31/TTY decoder)

   - High-dynamic range, down-conversion architecture, plus 32-bit I.F.
DSP
     for software-defined capabilities (and lots of room for future
expansion)

   - Optional subreceiver with *identical* performance to the main
receiver,
     including a fully independent front end, its own set of roofing
filters,
     its own DSP, and low-noise synthesizer; binaural or combined
receiver audio

   - Up to five crystal roofing filters *per receiver*, with bandwidths
as narrow as 200 Hz

   - Narrow ham-band filtering, plus optional general-coverage receive
filters
     (can be added to either or both receivers)

   - Internal 100-W ATU option with two antenna jacks

   - 100 W PA module includes two large fans, circuit breaker, full
parameter monitoring

   - All signal sources phase-locked to common 49.380 MHz reference
oscillator;
     1 PPM TCXO option, firmware-correctable to better than 0.5 PPM

   - Built-in PSK31, RTTY, and CW decoding and display allows use of
     digital modes with or *without* a computer; use CW keyer paddle or
     attached computer for casual, two-way data QSOs

   - Advanced noise reduction; auto- and manual notch. Noise blanker
included (both
     I.F. hardware pulse blanker and DSP noise blanking)

   - Easy-to-use DSP shift/width and locut/hicut controls with automatic
crystal filter
     selection based on selected passband width (in real-time -- no
filter calculation delays)

   - Dedicated CW/voice message buttons; optional digital voice recorder

   - 100 general frequency memories with alphanumeric text labeling,
plus 4 scratchpad memories per band

   - Full-custom, optimized, segmented LCD with two VFO displays,
alphanumeric text, and
     dedicated filter passband graphic

   - Rich I/O set: stereo speaker outputs, fully isolated soundcard
interface, dedicated RS-232
     I/O (and optional USB adapter), receive antenna in/out jacks (for
patching in RX filters, etc.),
     and both front- and rear-panel mic and headphone jacks

   - One-click PC firmware download program checks for updates
automatically and quickly
     updates microcontroller and DSP firmware

If you have any questions on specifications, performance, etc., that
are not answered by the data sheet, feel free to email
[hidden email].

Sales questions should go to Lisa:

   [hidden email]

We'd like to acknowledge the hard work of the following colleagues:

   Lyle Johnson, KK7P (DSP, digital I/O, audio I/O, many of the PC
boards, and countless critical tasks)
   Bob Friess, N6CM (RF deck, ATU, high-performance 1st mixer, noise
blanker, other receiver design)
   John Grebenkemper, KI6WX (synthesizer, general receiver architecture)
   Brian Broggie, W6FVI (manufacturing engineering -- say hi to him at
Visalia tomorrow)
   Paul Russell (purchasing)
   Lisa Jones (who somehow held down the fort during the entire process)

Eric (WA6HHQ), as usual, applied pressure in all the right places to
ensure that this would be the best radio we could make: he's Mr.
Performance and Features. Wayne (N6KR -- yours truly) was the principle
designer, and also got to do all the fun parts (packaging, firmware,
and Owner's manual). And that's why he gets to answer your questions  
:)

We'd also like to express our thanks to our very patient 15-member
focus group. Over a period of about a year, they endured a never-ending
series of concept drawings, refinements, and feature discussions.
They're a distinguished bunch! I'm sure you'll hear from some of them
as the K3 is discussed at length.

Finally: thanks to all of you who have generously contributed ideas for
a hypothetical K3 during our many on-line "fishing expeditions." You
had wonderful input, and I hope we've created the radio you've always
wanted.

73,
Wayne, N6KR
Eric, WA6HHQ


---

http://www.elecraft.com

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[Craig Rairdin]

Looks nice. My order is on your fax machine.

Craig
NZ0R

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of wayne burdick
Sent: Saturday, April 28, 2007 1:23 AM
To: Elecraft Reflector
Cc: QRP-L; [hidden email]
Subject: [Elecraft] Announcing the Elecraft K3 Transceiver: 10/100W,
160-6m,Assembled or Kit


Greetings!

This afternoon at the DX Convention in Visalia, CA, we unveiled a new
top-of-the-line transceiver -- the Elecraft K3. This is the culmination
of three years of design, test, and refinement, and we believe the K3
will set a new standard for performance and value in its class. It has
features and performance comparable to present radios ranging from
$4000 to $12000.

(We'd like to thank the many surprised convention attendees. What they
all said boils down to something like "Yes!")

A full K3 web page will be set up by Monday, complete with order form
and other details. Meanwhile, please take a look at the temporary page:

     http://www.elecraft.com/K3

Among other things, you'll find a very high-resolution front panel
photo (as well as other photos):

     http://www.elecraft.com/K3/K3_big_v2.jpg

And the K3 data sheet:

     http://www.elecraft.com/K3/K3_Data%20Sheet_rev06.pdf

There's also an order form that could be printed and mailed, but
sometime on Monday the on-line order page will be up and running, which
is the preferred method.

As explained on the order form, you can reserve a K3 now for initial
shipments in July. A 50% deposit is requested if you'd like to secure
one of the first 200 production units (serial numbers 20-220,
probably).

Here's a quick summary of the K3's specs:

   - K3/100 and K3/10 models (the K3/10 can be upgraded very easily,
internally, to a K3/100)

   - Basic K3 price ranges from $1399 to $1989 depending on whether you
start with the
     10-watt or 100-watt model, and whether you choose factory assembled
or
     modular, no-soldering, kit (this is the subject of the next email).

   - Desktop/portable size:  4"H x 10"W x 10"D (10 x 25 x 25 cm) --
optimized for both
     home and travel use

   - All modes (SSB, CW, DATA, AM, FM, plus AM-sync receive, and
built-in PSK31/TTY decoder)

   - High-dynamic range, down-conversion architecture, plus 32-bit I.F.
DSP
     for software-defined capabilities (and lots of room for future
expansion)

   - Optional subreceiver with *identical* performance to the main
receiver,
     including a fully independent front end, its own set of roofing
filters,
     its own DSP, and low-noise synthesizer; binaural or combined
receiver audio

   - Up to five crystal roofing filters *per receiver*, with bandwidths
as narrow as 200 Hz

   - Narrow ham-band filtering, plus optional general-coverage receive
filters
     (can be added to either or both receivers)

   - Internal 100-W ATU option with two antenna jacks

   - 100 W PA module includes two large fans, circuit breaker, full
parameter monitoring

   - All signal sources phase-locked to common 49.380 MHz reference
oscillator;
     1 PPM TCXO option, firmware-correctable to better than 0.5 PPM

   - Built-in PSK31, RTTY, and CW decoding and display allows use of
     digital modes with or *without* a computer; use CW keyer paddle or
     attached computer for casual, two-way data QSOs

   - Advanced noise reduction; auto- and manual notch. Noise blanker
included (both
     I.F. hardware pulse blanker and DSP noise blanking)

   - Easy-to-use DSP shift/width and locut/hicut controls with automatic
crystal filter
     selection based on selected passband width (in real-time -- no
filter calculation delays)

   - Dedicated CW/voice message buttons; optional digital voice recorder

   - 100 general frequency memories with alphanumeric text labeling,
plus 4 scratchpad memories per band

   - Full-custom, optimized, segmented LCD with two VFO displays,
alphanumeric text, and
     dedicated filter passband graphic

   - Rich I/O set: stereo speaker outputs, fully isolated soundcard
interface, dedicated RS-232
     I/O (and optional USB adapter), receive antenna in/out jacks (for
patching in RX filters, etc.),
     and both front- and rear-panel mic and headphone jacks

   - One-click PC firmware download program checks for updates
automatically and quickly
     updates microcontroller and DSP firmware

If you have any questions on specifications, performance, etc., that
are not answered by the data sheet, feel free to email
[hidden email].

Sales questions should go to Lisa:

   [hidden email]

We'd like to acknowledge the hard work of the following colleagues:

   Lyle Johnson, KK7P (DSP, digital I/O, audio I/O, many of the PC
boards, and countless critical tasks)
   Bob Friess, N6CM (RF deck, ATU, high-performance 1st mixer, noise
blanker, other receiver design)
   John Grebenkemper, KI6WX (synthesizer, general receiver architecture)
   Brian Broggie, W6FVI (manufacturing engineering -- say hi to him at
Visalia tomorrow)
   Paul Russell (purchasing)
   Lisa Jones (who somehow held down the fort during the entire process)

Eric (WA6HHQ), as usual, applied pressure in all the right places to
ensure that this would be the best radio we could make: he's Mr.
Performance and Features. Wayne (N6KR -- yours truly) was the principle
designer, and also got to do all the fun parts (packaging, firmware,
and Owner's manual). And that's why he gets to answer your questions  
:)

We'd also like to express our thanks to our very patient 15-member
focus group. Over a period of about a year, they endured a never-ending
series of concept drawings, refinements, and feature discussions.
They're a distinguished bunch! I'm sure you'll hear from some of them
as the K3 is discussed at length.

Finally: thanks to all of you who have generously contributed ideas for
a hypothetical K3 during our many on-line "fishing expeditions." You
had wonderful input, and I hope we've created the radio you've always
wanted.

73,
Wayne, N6KR
Eric, WA6HHQ


---

http://www.elecraft.com

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[Tony Morgan-2]

WOW! I knew this was a good night to stay up late.
Wayne, it looks beautiful. Looks like I'll have to have one!

73,
Tony W7GO
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[PA5MW]

Very, very, very cool

To all at Elecraft and relevant designers/beta testers, etc.:   GREAT
JOB DONE !!

Your contribution to our hobby in terms of building enjoyment as well as
delivering superb quality&service has been outstanding.


'73 Mark, PA5MW (PI4TUE)

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[wayne burdick]

Tony Morgan wrote:

> WOW! I knew this was a good night to stay up late.

For me, too!


> ....it looks beautiful.

Thanks, Tony. Believe it or not, we iterated the concept drawing some
200 times before starting the project. Too many chefs  :)

73,
Wayne


---

http://www.elecraft.com

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[dj7mgq]

Hallo Wayne et al,

WOW! Congrats on what looks like a very nice radio!

Before I start doing stupid things like filling out order forms and
the like:

1) Do any of the options conflict with each other, i.e. if A is
installed, then B can not be?

2) If the KRX3 is installed one would need two of the KFL3A-200,
KFL3A-250, KFL3A-400, KFL3A-500, KFL3A-2.8K, KFL3A-6K, KFL3B-FM, and
KBPF3 to have two maximum feature RXes?

3) If one installs the KBPF3, what impact does this have on the ham
band front filters?

4) Is the K3 avaidable with an optional KPA1500? hi hi


vy 73 de toby
--
DD5FZ, 4N6FZ (ex dj7mgq, dg5mgq, dd5fz)
K2 #885, K2/100 #3248
DOK C12, BCC, DL-QRP-AG

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[wayne burdick]

Toby Deinhardt wrote:


>
> 1) Do any of the options conflict with each other, i.e. if A is
> installed, then B can not be?

No, except that you're limited to 5 crystal roofing filters per
receiver.


>
> 2) If the KRX3 is installed one would need two of the KFL3A-200,
> KFL3A-250, KFL3A-400, KFL3A-500, KFL3A-2.8K, KFL3A-6K, KFL3B-FM, and
> KBPF3 to have two maximum feature RXes?

See above -- only five crystal filters per receiver. You can set them
up differently, if you prefer. For example you could put a really
narrow filter only on the main receiver, and put an FM filter only in
the subreceiver. In any case you can add filters incrementally.

You'd only need two KBPF3's if you wanted general coverage on both
receivers.


>
> 3) If one installs the KBPF3, what impact does this have on the ham
> band front filters?

None whatsoever. The KBPF3's filters are switched in only when needed,
and added strays are completely negligible. The KBPF3 mounts just above
the main band-pass filter array.


>
> 4) Is the K3 avaidable with an optional KPA1500? hi hi

Don't we wish  :)

Most engineering staff members were redirected to the K3 project, which
actually started before the amp, and which we decided should be
finished first. But we'll go back to the amp as time permits. Sorry,
can't give you a date....

73,
Wayne
N6KR

---

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[johnny-52]

Hi Wayne,

Well done.  I can now have a rig some how serviceable by myself.

I am interested in this new K3.  I am going to fax you my order form right the way.

73

Johnny Siu VR2XMC

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[Brian Mury-3]

On Sat, 2007-04-28 at 01:48 -0700, wayne burdick wrote:
> > 3) If one installs the KBPF3, what impact does this have on the ham
> > band front filters?
>
> None whatsoever. The KBPF3's filters are switched in only when needed,
> and added strays are completely negligible. The KBPF3 mounts just above
> the main band-pass filter array.

Do the KBPF3's count as one of the five roofing filters?


If the KRX3 is present and multiple transverters are connected to the
K3, will it be possible to transmit with one transverter while receiving
with another transverter? For example, would it be possible to transmit
on 2m while receiving on 70cm? I'm wondering about satellite operation.


> Most engineering staff members were redirected to the K3 project, which
> actually started before the amp, and which we decided should be
> finished first. But we'll go back to the amp as time permits. Sorry,
> can't give you a date....

This is a much nicer surprise than an amp, in my opinion! It looks like
everything I wanted in a K3, and a lot more. :-)


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[dj7mgq]

Hi Wayne,

'tis I, again:


> variable passband models that closely track DSP I.F. and A.F.
> filtering

Is this with the 5 or the 8 pole filters? Or is this a tba?


> Down-conversion architecture with narrow ham-band filtering for
> superior close-in dynamic range

Down to what? 5MHz, 455kHz ...  Image rejection?


> 32-bit I.F. DSP

Is the an API for roll your own DSP/SDR code?

Please, Please, Please, Pretty Please...



vy 73 de toby


PS:

> As you build, you'll learn the electronics theory behind

Smoke still inside is good, smoke escaping is not... hi hi

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[dj7mgq]

Hi Wayne,

YAQ: What are the phase noise figures like? Does the 1 PPM TCXO option
improve them, and if so by how much?

vy 73 de toby

PS: A FAQ on the website, like this one
<http://kb.flex-radio.com/article.aspx?id=10374>, might be a good
idea.

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[David A. Belsley]

Wayne:
   This looks beautiful.  Does the firmware download facility work  
with all platforms (Mac as well)? or is it only for Windows-based  
things?

thanks,

dave belsley, w1euy


On Apr 28, 2007, at 2:23 AM, wayne burdick wrote:

> Greetings!
>
> This afternoon at the DX Convention in Visalia, CA, we unveiled a  
> new top-of-the-line transceiver -- the Elecraft K3. This is the  
> culmination of three years of design, test, and refinement, and we  
> believe the K3 will set a new standard for performance and value in  
> its class. It has features and performance comparable to present  
> radios ranging from $4000 to $12000.
>
> (We'd like to thank the many surprised convention attendees. What  
> they all said boils down to something like "Yes!")
>
> A full K3 web page will be set up by Monday, complete with order  
> form and other details. Meanwhile, please take a look at the  
> temporary page:
>
>     http://www.elecraft.com/K3
>
> Among other things, you'll find a very high-resolution front panel  
> photo (as well as other photos):
>
>     http://www.elecraft.com/K3/K3_big_v2.jpg
>
> And the K3 data sheet:
>
>     http://www.elecraft.com/K3/K3_Data%20Sheet_rev06.pdf
>
> There's also an order form that could be printed and mailed, but  
> sometime on Monday the on-line order page will be up and running,  
> which is the preferred method.
>
> As explained on the order form, you can reserve a K3 now for  
> initial shipments in July. A 50% deposit is requested if you'd like  
> to secure one of the first 200 production units (serial numbers  
> 20-220, probably).
>
> Here's a quick summary of the K3's specs:
>
>   - K3/100 and K3/10 models (the K3/10 can be upgraded very easily,  
> internally, to a K3/100)
>
>   - Basic K3 price ranges from $1399 to $1989 depending on whether  
> you start with the
>     10-watt or 100-watt model, and whether you choose factory  
> assembled or
>     modular, no-soldering, kit (this is the subject of the next  
> email).
>
>   - Desktop/portable size:  4"H x 10"W x 10"D (10 x 25 x 25 cm) --  
> optimized for both
>     home and travel use
>
>   - All modes (SSB, CW, DATA, AM, FM, plus AM-sync receive, and  
> built-in PSK31/TTY decoder)
>
>   - High-dynamic range, down-conversion architecture, plus 32-bit  
> I.F. DSP
>     for software-defined capabilities (and lots of room for future  
> expansion)
>
>   - Optional subreceiver with *identical* performance to the main  
> receiver,
>     including a fully independent front end, its own set of roofing  
> filters,
>     its own DSP, and low-noise synthesizer; binaural or combined  
> receiver audio
>
>   - Up to five crystal roofing filters *per receiver*, with  
> bandwidths as narrow as 200 Hz
>
>   - Narrow ham-band filtering, plus optional general-coverage  
> receive filters
>     (can be added to either or both receivers)
>
>   - Internal 100-W ATU option with two antenna jacks
>
>   - 100 W PA module includes two large fans, circuit breaker, full  
> parameter monitoring
>
>   - All signal sources phase-locked to common 49.380 MHz reference  
> oscillator;
>     1 PPM TCXO option, firmware-correctable to better than 0.5 PPM
>
>   - Built-in PSK31, RTTY, and CW decoding and display allows use of
>     digital modes with or *without* a computer; use CW keyer paddle or
>     attached computer for casual, two-way data QSOs
>
>   - Advanced noise reduction; auto- and manual notch. Noise blanker  
> included (both
>     I.F. hardware pulse blanker and DSP noise blanking)
>
>   - Easy-to-use DSP shift/width and locut/hicut controls with  
> automatic crystal filter
>     selection based on selected passband width (in real-time -- no  
> filter calculation delays)
>
>   - Dedicated CW/voice message buttons; optional digital voice  
> recorder
>
>   - 100 general frequency memories with alphanumeric text labeling,  
> plus 4 scratchpad memories per band
>
>   - Full-custom, optimized, segmented LCD with two VFO displays,  
> alphanumeric text, and
>     dedicated filter passband graphic
>
>   - Rich I/O set: stereo speaker outputs, fully isolated soundcard  
> interface, dedicated RS-232
>     I/O (and optional USB adapter), receive antenna in/out jacks  
> (for patching in RX filters, etc.),
>     and both front- and rear-panel mic and headphone jacks
>
>   - One-click PC firmware download program checks for updates  
> automatically and quickly
>     updates microcontroller and DSP firmware
>
> If you have any questions on specifications, performance, etc.,  
> that are not answered by the data sheet, feel free to email  
> [hidden email].
>
> Sales questions should go to Lisa:
>
>   [hidden email]
>
> We'd like to acknowledge the hard work of the following colleagues:
>
>   Lyle Johnson, KK7P (DSP, digital I/O, audio I/O, many of the PC  
> boards, and countless critical tasks)
>   Bob Friess, N6CM (RF deck, ATU, high-performance 1st mixer, noise  
> blanker, other receiver design)
>   John Grebenkemper, KI6WX (synthesizer, general receiver  
> architecture)
>   Brian Broggie, W6FVI (manufacturing engineering -- say hi to him  
> at Visalia tomorrow)
>   Paul Russell (purchasing)
>   Lisa Jones (who somehow held down the fort during the entire  
> process)
>
> Eric (WA6HHQ), as usual, applied pressure in all the right places  
> to ensure that this would be the best radio we could make: he's Mr.  
> Performance and Features. Wayne (N6KR -- yours truly) was the  
> principle designer, and also got to do all the fun parts  
> (packaging, firmware, and Owner's manual). And that's why he gets  
> to answer your questions  :)
>
> We'd also like to express our thanks to our very patient 15-member  
> focus group. Over a period of about a year, they endured a never-
> ending series of concept drawings, refinements, and feature  
> discussions. They're a distinguished bunch! I'm sure you'll hear  
> from some of them as the K3 is discussed at length.
>
> Finally: thanks to all of you who have generously contributed ideas  
> for a hypothetical K3 during our many on-line "fishing  
> expeditions." You had wonderful input, and I hope we've created the  
> radio you've always wanted.
>
> 73,
> Wayne, N6KR
> Eric, WA6HHQ
>
>
> ---
>
> http://www.elecraft.com
>
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--------------------------------------------
david a belsley
professor emeritus at boston college


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[KK7P]

>   This looks beautiful.  Does the firmware download facility work with
> all platforms (Mac as well)? or is it only for Windows-based things?

Currently it is a windoze app.

Lyle KK7P

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[KK7P]

Toby,

Lyle here stepping in while Wayne gets a little well-deserved shut-eye.

>> variable passband models that closely track DSP I.F. and A.F. filtering
>
> Is this with the 5 or the 8 pole filters? Or is this a tba?

Mot yet completely finalized.

>> Down-conversion architecture with narrow ham-band filtering for
>> superior close-in dynamic range
>
> Down to what? 5MHz, 455kHz ...

8.215 MHz.

>  Image rejection?

Excellent.  Numbers for this, IMD3, BDR, etc. will be forthcoming.  We
need to be sure we've got it right before we release them.

Preliminary numbers beat the K2 in every respect.

>> 32-bit I.F. DSP
>
> Is the an API for roll your own DSP/SDR code?

No, but there is a very responsive design team that will be adding new
features, and with all firmware and programmable logic being Flash based
and updateable over the computer port, today's K3 will be just a new as
next year's.

And *every* feature and function you can control from the front panel
you can control remotely, so for those folks who want to put the radio
in a closet -- or a remote base -- and use a virtual control panel on
their PC< the hooks are all in place, and there will be an API for that :-)


73,

Lyle KK7P

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[Jack Smith-6]

Few questions related to the new panadapter kit I'm working on:

1. What is the IF frequency at the K3's IF output port?
2. Is the K3's IF output port wideband (ahead of the roofing filter) or
narrowband?
3. Is the IF frequency sense inverted on some bands, as is the K2?
4. Don't expect an answer to this, but have to ask. Before I invest 6
months developing the new Z92 panadpater kit aimed at K2 (and now K3),
is there going to be an official Elecraft panadapter accessory for the K3?

Jack K8ZOA
www.cliftonlaboratories.com
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[N8LP]

I see there is an IF output (2nd IF I assume). What are the IF
frequencies? Does the IF output follow rcvr selection? If I connect it
to my Z90 Panadapter, can I totally disable the roofing filters or does
it default to the widest one? If the latter, will you offer a w-i-d-e LC
filter option, or do I need to pull out the 1st IF ahead of the roofing
filters? What is the BW if I don't put roofing filters in one receiver?

I could go on, but I don't want to spoil your convention ;-)

73,
Larry N8LP



wayne burdick wrote:

> Toby Deinhardt wrote:
>
>
>>
>> 1) Do any of the options conflict with each other, i.e. if A is
>> installed, then B can not be?
>
> No, except that you're limited to 5 crystal roofing filters per receiver.
>
>
>>
>> 2) If the KRX3 is installed one would need two of the KFL3A-200,
>> KFL3A-250, KFL3A-400, KFL3A-500, KFL3A-2.8K, KFL3A-6K, KFL3B-FM, and
>> KBPF3 to have two maximum feature RXes?
>
> See above -- only five crystal filters per receiver. You can set them
> up differently, if you prefer. For example you could put a really
> narrow filter only on the main receiver, and put an FM filter only in
> the subreceiver. In any case you can add filters incrementally.
>
> You'd only need two KBPF3's if you wanted general coverage on both
> receivers.
>
>
>>
>> 3) If one installs the KBPF3, what impact does this have on the ham
>> band front filters?
>
> None whatsoever. The KBPF3's filters are switched in only when needed,
> and added strays are completely negligible. The KBPF3 mounts just
> above the main band-pass filter array.
>
>
>>
>> 4) Is the K3 avaidable with an optional KPA1500? hi hi
>
> Don't we wish  :)
>
> Most engineering staff members were redirected to the K3 project,
> which actually started before the amp, and which we decided should be
> finished first. But we'll go back to the amp as time permits. Sorry,
> can't give you a date....
>
> 73,
> Wayne
> N6KR
>
> ---
>
> http://www.elecraft.com
>
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>
>

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[Bob P-2]

I have a problem I think I solved, but would like a few comments.

I installed a new K1 2 Band Board and all things went smooth till I tried to
send with ATU

First it would send on 40 meters, then at 80 I got a short chirp and a low
buzz intread of 800 Hz sound

So I found a bigger power supply ( 2a vs my old .400 millia) and also
changed the antenna and all things are find.

Life is Short, Learn Morse Code and have fun.

Bob in Ohio, KC8IPQ

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[KK7P]

>>> 3) If one installs the KBPF3, what impact does this have on the ham
>>> band front filters?
>> None whatsoever. The KBPF3's filters are switched in only when needed,
>> and added strays are completely negligible. The KBPF3 mounts just above
>> the main band-pass filter array.
>
> Do the KBPF3's count as one of the five roofing filters?

No, these are LC filter networks at RF rather than crystal filters at IF.

> If the KRX3 is present and multiple transverters are connected to the
> K3, will it be possible to transmit with one transverter while receiving
> with another transverter? For example, would it be possible to transmit
> on 2m while receiving on 70cm? I'm wondering about satellite operation.

With the subreceiver and the right connections to the transverters, it
*should* be possible.  Satellite capability is one of my design goals
with the K3 :-)

Remember that the K3 DSP, MCU and programmable logic are all Flash
based, and can be updated via your computer suing the included PC
application software.  So features and functionality will be added over
time, and early radios will be capable of the same new features as later
radios.

73,

Lyle KK7P (AMSAT Life Member)

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[KK7P]

> I see there is an IF output (2nd IF I assume).

It is 1st IF, centered at 8.215 MHz.

> What are the IF frequencies?

8.215 MHz, 15 kHz.

> Does the IF output follow rcvr selection?

It is main Rx.

> If I connect it
> to my Z90 Panadapter, can I totally disable the roofing filters or does
> it default to the widest one?

IF tap is before the roofing filters.

> If the latter,

No.

> will you offer a w-i-d-e LC filter option,

Not required.

> or do I need to pull out the 1st IF ahead of the roofing
> filters?

Already done for you :-)

> What is the BW if I don't put roofing filters in one receiver?

I don't know, but I really suggest to not bypass the roofing filters.

73,

Lyle KK7P

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[N8LP]

OK, I get it now. I assume the IF frequency sense is inverted on one
side of 8215 KHz then, but will await your response to K8ZOA's question
on that one.

73,
Larry N8LP



Lyle Johnson wrote:

>> I see there is an IF output (2nd IF I assume).
>
> It is 1st IF, centered at 8.215 MHz.
>
>> What are the IF frequencies?
>
> 8.215 MHz, 15 kHz.
>
>> Does the IF output follow rcvr selection?
>
> It is main Rx.
>
>> If I connect it to my Z90 Panadapter, can I totally disable the
>> roofing filters or does it default to the widest one?
>
> IF tap is before the roofing filters.
>
>> If the latter,
>
> No.
>
>> will you offer a w-i-d-e LC filter option,
>
> Not required.
>
>> or do I need to pull out the 1st IF ahead of the roofing filters?
>
> Already done for you :-)
>
>> What is the BW if I don't put roofing filters in one receiver?
>
> I don't know, but I really suggest to not bypass the roofing filters.
>
> 73,
>
> Lyle KK7P
>
>
>

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