[Milsurplus] TBX-6 receiver microphonics

[J. Forster]

Agreed. Any tube in the audio chain could cause microphonics. In fact, the
ones closest to the detector would be my first suspects.

FWIW,

-John

============


> Rob,
>
> You may have a microphonic tube. Did you replace the other tubes with
> those from a working TBX set?
>
> Mike N2MS
>
> ----- Original Message -----
> From: Robert Flory
> To: milsurplus
> Sent: Tue, 18 May 2010 09:45:12 +0000 (UTC)
> Subject: [Milsurplus] TBX-6 receiver microphonics
>
> Hi,
>
> My TBX-6 receiver has been bugging me.  I don't remember the others I had
> having such a high level of receiver microphonics.  If I switch a front
> panel switch or tap the cabinet the audio "rings" for a couple of seconds.
>
> I have been attributing this to the lack of the sheet metal cover for the
> receiver compartment, but holding a piece of aluminum in place doesn't
> change anything.
>
> I have tapped around the inside quite a bit without finding a particularly
> sensitive spot or loose component.
>
> Replacing the audio output tube didn't help.
>
> Are the tube shields supposed to have caps?
>
> I'll be joining the lineup of military displays at our local Memorial Day
> observance with the TBX set.  Wonder if I can get one of the real Marines
> to crank the generator for me....
>
> 73, Rob
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