[ARC5] ARC5 CW Question

[Mike Hanz]

On 6/21/2014 8:00 PM, J Mcvey via ARC5 wrote:
> I was looking through the SCR274 manual, trying to figure out the original control circuitry and realized that they used a boat load of relays!
> It looks like there was a CW  "break-in" system of sorts, but I haven't found a delay anywhere.
> So, my question is: Do all of those relays have to engage very time you hit the key?
> If so,that's a whole lotta clacking goin' on!

Nope.  Only the keying relay in the modulator (K-52), and the antenna 
relay (K-55) click and clack while sending CW.  See 
http://aafradio.org/docs/Relay_timing_issues_-_SCR-274N.html for more on 
the timing issues.

73,
Mike  KC4TOS