[AMRadio] NC270 Muting

[C.L. Mitchell]

When you open the +145 VDC line, that kills everything except the first converter and the audio output stage.  That is the way this rcvr was designed according to the schematic.  With the use of the normal TR relay which shorts the rcvr output during transmit or an electronic TR switch I have not had any problems with other rcvrs.  This is, however, the only rcvr I have looked at that the audio output stage stays on in standby.
 

> Date: Thu, 7 Apr 2011 20:39:04 -0500
> From: w5omr at att.net
> To: amradio at mailman.qth.net
> Subject: Re: [AMRadio] NC270 Muting
> 
> On 04/07/2011 06:22 PM, Harold Smith wrote:
> > Bob,one simple way to quite the rec is to short across the speaker terms
> > ..If you are using a Xmtr with PTT it is simple ...Connect a set of contacts
> > norm open to spkr terms on back..When you hit PTT the rec will stndby..It is
> > a safe method ,some commercial receivers were controlled that way..LOL
> 
> That doesn't protect the receiver from front-end overload, not to 
> mention doing bad things to the AGC circuit.
> 
> 
> 
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