[Collins] muting a 51J4?

[Eugene Hertz]

I was afraid that was the answer. No big deal really, I just have an old wallwart that I can use and put in series with my aux contacts on the tr relay and then over to the j4.

Too bad. Wouldn't have been a good (better?) solution to simply make the internal J4 relay actuate on 6V instead of 12, then provide the filament voltage to one side of the relay coil the other could be grounded by a TR relay and voila! 

Oh well, I guess its not to be. But thanks for the verification
Eugene 


>-----Original Message-----
>From: C E [mailto:catman351 at yahoo.com]
>Sent: Friday, October 20, 2006 09:53 PM
>To: 'Eugene Hertz', collins at mailman.qth.net
>Subject: Re: [Collins] muting a 51J4?
>
>Hi Eugene: 
>Sorry but you do have to supply 12 volts to mute the 
>J4. However, this is simpler than others would care to 
>admit. W3BYM (Tony Marcello) wrote an article in 
>Electric Radio on exactly how to do this. He tapped 
>off the filament line and using a voltage doubler, 
>used this supply to key the relay. 
> 
>The J series radios are, unfortunately, not the types 
>that you simply slave to a relay (unlike the 75A 
>series, which you can). 
> 
>I hope this helps. Have a great time operating once 
>you solve this techical "speedbump." 
> 
>Cal, N6KYR/8 
>Lansing, Michigan 
> 
>--- Eugene Hertz <ehertz at tcaf.org> wrote: 
> 
>> Hi All. I am getting ready to get my 51J4 up and 
>> running as my receiver for my shack. I am getting 
>> my TR relay and other stuff set up. I am trying to 
>> understand how to mute the J4 upon transmitting. I 
>> read the manual and was wondering if someone could 
>> confirm that in order to mute, I need to apply 12V 
>> between contacts #2 and #3 on the strip at the back? 
>> 
>> I was really hoping that simply grounding one of the 
>> connections would do the trick. That sounds so much 
>> more civilized than having to make a source of 
>> 12vdc. 
>> 
>> Anyone confirm? 
>> 
>> thanks 
>> Eugene 
>> 
>> 
>> 
>> 
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