[Elecraft] KDVR3 Firmware request

[Iain MacDonnell - N6ML]

Ed Gray W0SD wrote:
> Thanks Lyle!  For me that is great news!
> 
> I have another question on the KDVR3. If I am using PTT rather than VOX 
> can I play a DVR message by tapping for example M1.  Let me explain 
> more.  A long term problem with VHF contesting and using DVR on two 
> meters and above is hot switching the amplifier T/R relay at high power, 
> ie 8877 on two meters.  By and large people use PTT and even then in 
> some cases a sequencer to be sure the amplifier T/R relay has to be 
> closed or at least gets a head start at two meters and up.  If you use 
> DVR on VOX you soon burn up an amplifier T/R relay at Two meters and up 
> unless it is an expensive vaccum T/R and I have seen them go!
> 
> With the KDVR3 I am wondering when using the K3 with a XVERTER if one 
> can key it and the amplifier it is driving with PTT and then play the 
> KDVR3 message tapping the M1, etc. key.
> 
> I am assuming if the VOX is not on the KDVR3 will not key up the radio 
> if you accidently hit M1, etc.

Pressing M1 *does* key the radio even if you're in PTT mode, and it
should - I don't want to have to separately assert PTT (or use VOX) to
transmit a recorded audio message.

I don't drive an amplifier myself, but I understand that there's a
configurable delay between they KEY OUT of the K3 and actual transmit.
I expect it should apply to DVR-initiated TX as well as PTT . Wouldn't
that be sufficient?


> However I am wondering since in USB or 
> LSB you can send CW even though the radio has the VOX turned off. Put 
> another way you can not transmit with the mic until you engage PTT but 
> if you hit the key it still works jsut like VOX.  Maybe there is a 
> setting where that can be defeated but if so I have missed it?

Are you asking about the CW key or the M1 button? The CW key will only
be active in SSB mode if you have turned on "SSB +CW" in CONFIG:CW WGHT
(manual page 53). Whether or not that should key the radio without VOX
or PTT is an interesting question, but I'm not sure if it's the one
you're asking! :)

     ~Iain / N6ML