[Milsurplus] AN/PRC-74 and CW??

[Oskar]

Many Thanks Richard for very quick and perfect
information!!!

73,

Oskar


--- "Richard Arland, W3OSS"
<richard.arland at verizon.net> wrote:

> In a personal correspondence with Mark Francis,
> KI0PF, he wrote me the 
> following:
> 
> 
> I just realized I didn't include that in the book. 
> Pinouts for
> both audio connectors:
> 
> A: GROUND
> B: RECEIVE AUDIO
> C: PTT
> D: MIKE INPUT
> E: CW KEY
> F: +12VDC ON
> 
> CAUTION: Pin F is switched 12VDC.  When the set is
> on, 12V is present
> here.  CARE must be taken not to short this pin to
> the others!  USE THE
> CORRECT (U-229) connector.
> 
> When you push the mike button, you ground pin C and
> send audio in on
> pin D.
> 
> Grounding pin E will transmit CW.  When you let off
> the key, there is a
> slight pause before the set goes back into RX.  This
> keeps the DC-DC 
> converter
> going between letters at about 20wpm but allows
> break-in between words.
> 
> If you ground the PTT continuously, the break-in is
> bypassed and then
> grounding pin E will send CW without the break-in
> (which I find
> annoying because I don't send fast enough).
> 
> So I have a key with an extra toggle switch on it
> that grounds pin C.
> The key itself goes between A and E.  A key can be
> hooked
> to either audio connector.
> 
> ----------
> From CQ Communications,
> 
>             "MIL SPEC RADIO GEAR"
>                    by Mark Francis, KI0PF
> And that is how you make the PRC-74 talk CW!
> 
> My thanks to Mark, and GL with your rig/
> 
> 73 Rich W3OSS
> 
> > Subject: [Milsurplus] AN/PRC-74 and CW??
> 
> 
> > Hello,
> >
> > I just would like to ask is PRC-74 manpack
> > able to transmitting CW?
> > I am asking because I dont see any markings
> > regarding CW or Key on the front plate.
> > There are only two connectors labelled AUDIO.
> >
> > 73,
> >
> > Oskar
> 
> 



 
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