[Boatanchors] Tube radio Product detectors

[WA5CAB at cs.com]

Actually, a decent product detector should have absolutely no output 
without BFO input.

Greg, you didn't say what mode other than SSB you always set your receivers 
to before turning them on.  

In a message dated 7/10/2010 8:42:01 PM Central Daylight Time, 
garyschafer at comcast.net writes: 
> The BFO may not be starting. A product detector has little output without
> the BFO signal.
> 
> 73
> Gary  K4FMX
> 
> >-----Original Message-----
> >From: boatanchors-bounces at mailman.qth.net [mailto:boatanchors-
> >bounces at mailman.qth.net] On Behalf Of Greg Mijal
> >Sent: Saturday, July 10, 2010 8:33 PM
> >To: boatanchors at mailman.qth.net
> >Cc: milsurplus at mailman.qth.net; testequipment at mailman.qth.net
> >Subject: [Boatanchors] Tube radio Product detectors
> >
> >Hi:
> >
> >I was thinking about something I see here at the repair bench.  Some of
> >the receivers and transceivers I work on have something funny going on in
> >the product detector.  Turn the radio on, let it warm up and no audio.
> >Rock the mode switch to SSB and poof! rig is now receiving normally and
> >stays that way for whole time it is used.
> >What causes this?  Even my 75S1 does it and now I have a Galaxy
> >transceiver with the exact same symptom.
> >What's up?
> >Tnx
> >Greg
> >WA7LYO
> >Kinston NC
> 

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