[ARC5] Trivia Challenge - Yet More

[Mike Morrow]

Very good!  Now I think you're ready for this:

There is, in fact, an audio line connected to the front panel adapter connector for the R-23, R-23A  R-24, and R-148/ARC-5 "navigation" receivers.  It is a filtered for a low frequency audio signal from the 12A6 cathode, and does not come from the AF transformer secondary.

What is that for?

Mike / KK5F


-----Original Message-----

>Because the audio line (TEL) is not connected to J1 on the front panel in
>the AN/ARC-5 receivers.
>
>Dave
>N9ZC
>
>On Fri, Sep 4, 2015 at 7:52 PM Mike Morrow <kk5f at earthlink.net> wrote:
>
>> Ok...here's a twist on command set knowledge:
>>
>> The wiring diagram in Dave's post will work perfectly once the BFO and RF
>> GAIN circuitry is removed from the rear connector (leaving only the control
>> circuitry wired to the front adapter panel), for ALL ARA and SCR-274-N
>> receivers.
>>
>> BUT it will NOT work for ANY AN/ARC-5 receiver.
>>
>> Why not?
>>
>> Mike / KK5F
>>
>> -----Original Message-----
>>
>> >Ding! Ding! Ding!  Winner!
>> >
>> >On Fri, Sep 4, 2015 at 5:49 PM Kenneth G. Gordon <
>> kgordon2006 at frontier.com>
>> >wrote:
>> >
>> >> On 4 Sep 2015 at 21:42, Dave Merrill wrote:
>> >>
>> >> > Can you spot anything amiss in this diagram from Volume Four of
>> *Hints &
>> >> > Kinks* 1949?
>> >> >
>> >> > http://s150.photobucket.com/user/r-390a/media/HK%202.jpg.html
>> >> >
>> >> > What would happen if you wired it up this way?
>> >>
>> >> The screen voltage would be grounded when the rear BFO switch was set to
>> >> OFF. The receiver would probably go dead and/or one of the two black
>> >> resistors in the rear would get hot, or the dynamotor would be dragged
>> down
>> >> to low output and would get hot.