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Feature request - Disable Break In on K3

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Mike Schultz KS0T

Re: Feature request - K3 RX EQ by mode

They ARE separate. CW rxEQ is separate from voice mode rxEQ, and rxEQ is
disabled in DATA mode.
Mike, KS0T

-----Original Message-----
From: Martin Kratoska
Sent: Wednesday, August 28, 2013 3:11 AM
To: [hidden email]
Subject: [Elecraft] Feature request - K3 RX EQ by mode

Hello,

it would be nice to have RX EQ by mode. Separate adjustment for CW
cutting the passband >800 Hz eliminates the fatigue from noise but is
rather impractical while (casually) operating SSB...

73,
Martin, OK1RR
K3 #7554
KPA500 #1565
KAT500 #849
P3 #2752
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ok1rr

Re: Feature request - K3 RX EQ by mode

Many thanks, I must be blind or non-literate.

73,
Martin, OK1RR
K3 #7554
KPA500 #1565
KAT500 #849
P3 #2752

Dne 28.8.2013 13:21, Mike Schultz napsal(a):

> They ARE separate. CW rxEQ is separate from voice mode rxEQ, and rxEQ is
> disabled in DATA mode.
> Mike, KS0T
>
>
> -----Original Message----- From: Martin Kratoska
> Sent: Wednesday, August 28, 2013 3:11 AM
> To: [hidden email]
> Subject: [Elecraft] Feature request - K3 RX EQ by mode
>
> Hello,
>
> it would be nice to have RX EQ by mode. Separate adjustment for CW
> cutting the passband >800 Hz eliminates the fatigue from noise but is
> rather impractical while (casually) operating SSB...
>
> 73,
> Martin, OK1RR
> K3 #7554
> KPA500 #1565
> KAT500 #849
> P3 #2752
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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Joe Subich, W4TV-4

Re: Feature request - Disable Break In on K3

In reply to this post by AD6XY

> In the unlikely event anyone is interested, I use one of WW2R/G4FREs
> band selection boards to provide a 12V signal for
> 4m/2m/70cm/23cm/13cm/9cm/6cm/3cm band. It monitors the K3 RS232 line.
> It also provides band by band PTT but I don't use that facility, I
> gate a single PTT line via the 12V per band.

Why don't you simply add a second gate? Gate KeyOut (which you are
using for PTT) by band select *and* the signal you use as the K3 PTT
*input*. In other words take a NOR gate, connect a diode from one
input to the K3 PTT input (mic jack and rear panel are in parallel),
connect the other input to KeyOut (or KeyOut LP if you are using the
ACC jack) and connect the output of the NOR gate to the PTT Input of
your WW2R/G4FRE board or the current PTT logic.

73,

... Joe, W4TV

On 8/28/2013 4:59 AM, AD6XY wrote:

> Thanks everyone for the most useful suggestions. I have now determined that
> the semi break in delay only works when VOX is activated, so if you are
> using PTT, which I was, and you press the memory button, there is no delay
> and the PTT output rattles up and down. With VOX activated the hang time is
> asserted.
>
> Fortunately, VOX is mode sensitive, i.e. CW and SSB are set individually so
> one can live with this. I don't understand why you need VOX for Semi break
> in to work, but that's how it is.
>
> The TX suppression is a good thing to have, but in my case it is handled in
> the transverters. The TX power is only 1mW and it goes straight into the
> mixer. At that power level it hardly matters if the input pin diodes or
> relays are hot switching. What does matter is the settling of the output
> TX/RX relays and this is OK because I switch the PA bias with a 100mS delay
> so they don't see power until they have had time to settle.
>
> A rapidly changing PTT out status is a problem for my system because, a lot
> is going on in the TX/RX changeover. There are bias supplies and drain
> supplies to switch and a rapid on/off could defeat my relatively simple
> sequencing logic. This takes about 100mS and if the PTT drops part way
> through and then rises again just after, it could result in hot switching.
>
> There is a useful K3 option to delay TX by up to 60mS to allow for
> amplifiers to switch. I am using this as well, just in case.
>
> In the unlikely event anyone is interested, I use one of WW2R/G4FREs band
> selection boards to provide a 12V signal for
> 4m/2m/70cm/23cm/13cm/9cm/6cm/3cm band. It monitors the K3 RS232 line. It
> also provides band by band PTT but I don't use that facility, I gate a
> single PTT line via the 12V per band.
>
> In the shack I have two of W1GHZs miniverters, one for 2m and one for 70cm
> which provide the interface to the microwave transverters. These share a VHF
> Apollo local oscillator which develops 116 MHz or 404 MHz as required. Some
> simple diode/relay logic selects which IF, LO and microwave transverter is
> activated depending on the microwave band. It is designed for 23/13/9/6/3cm
> but currently only 23/13/9cm are on the mast.
>
> My microwave transverters are located 20m away, at the base of my
> lightweight Tenamast to cut down on cable losses. The 12V per band and PTT
> signals are decoded with relay/diode logic. I have 1:6 relays at the top and
> bottom so I only need one TX and one RX feeder up the mast. This saves much
> weight and each feeder is only 10m long. As the pre-amps and band select are
> all in a box at the top, I can use a lightweight LMR400 for the RX line. The
> TX line is LDF4-50, LDF5-50 would have lower loss but it is not flexible
> enough.
>
> Apart from raising the mast, this is all completely automated, (potentially
> controllable via the internet if only I had a decent broadband connection)
> and it does not interfere with HF/VHF operation.
>
> Mike
>
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/Feature-request-Disable-Break-In-on-K3-tp7578303p7578335.html
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AD6XY

Re: Feature request - Disable Break In on K3

Hi Joe,

That's an easy one - I did think about that but rejected the idea as the K3 can go into transmit without a PTT input, in several ways, including the extremely useful voice keyer but also by PC command, pressing the tune button, VOX etc.

Mike

Don Wilhelm-4

Re: Feature request - Disable Break In on K3

Mike,

If you use Joe's solution where PTT is one input into an AND gate, if
PTT is not asserted, your relays will not close. All inputs to the AND
gate must be present for the output to change state.

73,
Don W3FPR
On 8/28/2013 2:08 PM, AD6XY wrote:

Joe Subich, W4TV-4

Re: Feature request - Disable Break In on K3

In reply to this post by AD6XY

I guess you need to make a choice - "fast" Key Out if you are
not using semi break-in or PTT to condition KeyOut. Of course the
other solution is to add external delay to KeyOut (in the sequencer).

KeyOut is /8R (effectively the receiver MUTE line which works no
matter what switching mode - VOX/PTT/Semi break-in - is selected)
in the K3. There is no processor involvement and no delay which is
*exactly* what I want for driving a QSK PA. If I want delay, I can
turn on the VOX to select semi break-in.

73,

... Joe, W4TV

On 8/28/2013 2:08 PM, AD6XY wrote:

> Hi Joe,
>
> That's an easy one - I did think about that but rejected the idea as the K3
> can go into transmit without a PTT input, in several ways, including the
> extremely useful voice keyer but also by PC command, pressing the tune
> button, VOX etc.
>
> Mike
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/Feature-request-Disable-Break-In-on-K3-tp7578303p7578350.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

Ralph Parker

Re: Feature request - Disable Break In on K3

In reply to this post by AD6XY

>If you use Joe's solution where PTT is one input into an AND gate, if PTT is
>not asserted, your relays will not close. All inputs to the AND gate must be
>present for the output to change state.

I've wanted this 'feature request' since K3 Day 1.
Don's solution sounds like a reasonable work-around.
Unfortunately, I'm transistorially challenged.
Can I build this with a few 12AU7s ?

Ralph, VE7XF

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Don Wilhelm-4

Re: Feature request - Disable Break In on K3

Certainly you could build it with 12AU7s, but more simply, a 74LS11 (or
74AC11) will do the job nicely. That has 3 3 input AND gates, and you
need only one of the 3. If you chose that device, you will need
inverters (74LS04) in addition because PTT is active low, and the inputs
of the 74LS11 will AND with active high, so you may need to invert some
inputs, and depending on what you are driving, you may have to invert
the output of the AND gate. In addition, you may need some sort of a
relay driver if the relays cannot be driven from a 5 volt logic source.

A little study into logic devices may be in order - it is not
complicated, you just have to "follow the rules".

For the 74AC11, when all 3 inputs are at a high level, the output will
be at a high level - if any of those inputs are at a low level, the
output will also be low. High level for the 74LS family is a voltage of
2 volts or greater (up to 5 volts) and a voltage of 0.8 volts or lower
for a "low" voltage. The "AC" family allows a greater range, but not as
much noise immunity for voltage between the high and low thresholds.

Joe suggested using a NOR gate which is a little different in that it
will logically AND the inputs when they are *all* at a low level and the
output will then be at a high level. Again, a little study of logic
gates may be required for those not familiar with digital logic - they
can do marvelous things if you want some conbination of signals o
produce a specific output.

73,
Don W3FPR

On 8/29/2013 7:15 PM, Ralph Parker wrote:

>> If you use Joe's solution where PTT is one input into an AND gate, if PTT is
>> not asserted, your relays will not close. All inputs to the AND gate must be
>> present for the output to change state.
> I've wanted this 'feature request' since K3 Day 1.
> Don's solution sounds like a reasonable work-around.
> Unfortunately, I'm transistorially challenged.
> Can I build this with a few 12AU7s ?
>
> Ralph, VE7XF
>

AD6XY

Re: Feature request - Disable Break In on K3

This post was updated on .

In reply to this post by Don Wilhelm-4

Hi Don,

I guess I didn't explain well enough.

What I meant is the K3 has lots of ways to go to TX many of which I want to use

I do want to go to TX via the voice keyer, or via the internet, or via the key, memory keyer, tune button or even the microphone ptt switch. I just don't want it to QSK when using CW. I have found a work around I listed earlier, its not ideal as its not quite foolproof, but its a lot better.

Mike