-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Vince Vielhaber
Sent: Friday, March 2, 2018 9:23 PM
To: [email protected]
Subject: Re: [BITX20] B40 LM386 and ?B TDA2822 and that 470?F Cap
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On 03/02/2018 10:06 PM, Tim Gorman wrote:
> Respectfully -
>?
> If you wire the positive output of the 2822 to both the tip and ring
> terminal on the TRS jack and the ground lead to the sleeve terminal
> and then plug in a mono plug you *will* short the positive lead from
> the
> 2822 to ground.
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I didn't, nor would I ever tell someone to do that.
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> Wiring the ground to the ring lead is *NOT* what the wiring
> instructions for the ubitx show. It shows wiring the positive lead
> from the 2822 to both the tip and the ring lead. That will be a
> potential disaster for anyone plugging in a mono plug.
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It's been pointed out in the past that there are errors in the wiring diagram.? If it says that, I'd call that an error.? I haven't looked at the diagram that closely.
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> If you wire the ground lead to the ring terminal then how is a stereo
> plug going to work? There will be no ground connected to the sleeve
> lead of the headset.
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Simple, the ground, that's not connected, is common to both sides.? Plug the headphones in and get a connection from tip to ring and a non-connected ground putting the two speakers in series and sound from both.
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Vince.
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???Michigan VHF Corp.?? ??
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