[Collins] collins_radios] Collins Net

[Dr. Gerald N. Johnson]

Check the simple things first. First the microphone gain control that 
its not turned way down or open at some positions. Then the microphone 
connector, followed by the microphone cable at the ends. In my 
experience microphone cables fail most often, more often that tubes and 
at the transmitter end of the cable where solder wicked into the 
stranded wire makes the wire break or the insulation falls off and the 
audio gets shorted. There's always more stress at the ends of the 
microphone cable.

Another test is to enable VOX and see if the relay keys, that will check 
some of the circuits between the microphone and the audio pick off for 
the VOX, but the VOX gain has to be above zero for the VOX to work and 
the antivox can't be too high.

Then check the listed tubes and the diode ring balanced modulator.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association

On 8/24/2014 11:00 AM, Joanna Berman wrote:
> Check tubes V-1 (first and second audio amp), V-2 (audio cathode
> follower) and V-3 (i-f amp).  The 32S-3 will work FB on cw even if
> those tubes are bad.
>
> Another thing to check, if tubes are good, is the coupling cap
> between V-2 and the balanced modulator.
>
> Steve, N6HK
>
> On August 24, 2014, at 09:42, "'Brian R. Malone'
> brian.malone at pharmacy.stjohns.edu [collins_radios]" wrote:
>
> I went to fire up my old Collins S line the other day and although
> the TX tunes well, when I went to the SSB mode and keyed the mike, I
> hear the relay as normal, but no audio on my scope or power output.
> CW, no problem.
>
> Any ideas? Once before this happened intermittently, but once and
> warmed up for a while, it resolved itself. Not this time.
>
>
>
> Best,
>
> Brian Malone
>
> New York
>
> W2BRM
>
>
>> On Aug 24, 2014, at 9:24 AM, "'David Knepper'
>> collinsradio at comcast.net
>> [collins_radios]"<collins_radios at yahoogroups.com>  wrote:
>>
>> Today, the CRA sponsored, Collins Net will be held on a frequency
>> of 14.263 Mhz at 12:30 EDST or 1630 GMT
>>
>> Your net control station will be Ed, WB2ANJ from the state of
>> Oklahoma.  Ed should be listening for “early birds”  at around
>> 12:15 EDST
>>
>> Please give him your support.
>>
>> Thank you
>>
>> David Knepper - W3CRA/W3ST Collins Radio Association
>> www.collinsra.org Join the CRA today
>>
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