[ARC5] ARC5 CW Question

Jay Coward via ARC5 arc5 at mailman.qth.net
Sun Jun 22 14:42:49 EDT 2014


I always thought you put the diode across the coil to short the back emf. (?)
Jay
 
 
-----Original Message-----
From: Mike Hanz <aaf-radio-1 at aafradio.org>
To: J Mcvey <ac2eu at yahoo.com>; ARC-5 List <arc5 at mailman.qth.net>
Sent: Sun, Jun 22, 2014 11:33 am
Subject: Re: [ARC5] ARC5 CW Question


On 6/22/2014 11:12 AM, J Mcvey via ARC5 wrote:
> In summary, the only relays that should be clacking when keying is the antenna 
relay in the BC442 antenna switch unit and K52 in the MD7. Is this correct?

That is correct.  Steve KB4DMF discovered the chirp described in my 
first e-mail after putting together an entire two transmitter/three 
receiver set in its original complete form.  That's not typically how 
hams used/use them, so we had never heard of any anomaly like that 
before.  Ferreting out the reasons behind the chirp and fixing it was an 
interesting exercise.
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