[TenTec] Mono-Stereo audio jack

[Dale L. Martin]

Joe,
Thanks for the note.

I was speaking only in terms of Omni VI+ wiring of the phone
jack.  I can't speak about the SGC since I don't have access to
one or it's schematic.

I think someone pointed out early on in this thread that the SGC
was wired without the 100 ohm resistors across each 'hot' lead
thereby balancing the audio for stereo phones and for mono
phones.  If the 'hot leads were wired directly to the common
audio source, mono phones would short out the audio--which is
what you said you were seeing (hearing).

73,
dale, kg5u



-----Original Message-----
From: Joseph Pursley <kf5mc@flash.net>
To: Dale L. Martin <kg5u@hal-pc.org>
Cc: tentec@contesting.com <tentec@contesting.com>
Date: Sunday, September 20, 1998 17:59 PM
Subject: Re: [TenTec] Mono-Stereo audio jack


>Have the same effect here. A stero jack would have audio in both
>earphones. However when a mono jack is plugged in half way it
works and
>when pushed in all the way it shorts out the audio . There must
be some
>merit to what I originally said otherwise SGC would not have
told me I
>am right......Obviously they placed the audio to both
connections of the
>Stereo jack.......I am not impressed by the schematics. The rig
is
>having enough problems just meeting the specs. After trying CW
and
>finding out that the note is sour I also found out that instead
of
>having an offset it is dead center on frequency. Oddly enough
again ,
>instead of having to tune up to hear it one must tune down
>frequency.......joe
>
>Dale L. Martin wrote:
>
>> Interesting....I plugged my stereo headphones into my Omni VI+
>> and heard audio in both ears.  If it was a mono jack, I would
>> only hear one headphone.
>>
>> Plugging a mono or stereo headphone set in should give the
same
>> indication: audio in both ears.
>>
>> Check the radio schematic (in my book it's between page 4-53
and
>> 5-1) and you should see that the phone jack is a stereo phone
>> jack with make/break contacts for diverting the audio to the
>> speaker when a plug is not in the jack.
>>
>> 73,
>> dale, kg5u
>> .
>>
>> -----Original Message-----
>> From: Jim White <jwwhite@gate.net>
>> To: tentec@contesting.com <tentec@contesting.com>
>> Date: Saturday, September 19, 1998 7:38 AM
>> Subject: [TenTec] Mono-Stereo audio jack
>>
>> >
>> >Hi, My Omni VI + has a Mono jack on the front for "phones"-
it
>> seems to like
>> >Lo-Z better, I have a pair of 600 Ohm WWII phones that work
FB.
>> My Hi-Z
>> >phones have less volume--' 73 Jim W. K1EXE
>> >
>> >
>> >--
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>> >
>>
>> --
>> FAQ on WWW:
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>
>
>
>


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