[R-390] SSB Converters Diode Bridge

Tue, 14 Jan 2003 20:47:26 -0500

Hi,

Germanium would not be a good idea here. The idea is to have a diode that
goes high impedance when reverse biased and low impedance when forward
biased. More or less you are using it like a switch rather than a detector.
A germanium diode does not go as high impedance when reverse biased as a
silicon part. If you have 1N4148's they should do just fine. Last time I saw
them they cost less than a dime each.

    Take Care!

        Bob Camp
        KB8TQ

----- Original Message -----
From: <[email protected]>
To: "Scott, Barry Clyde B" <[email protected]>; "R390 E-mail"
<[email protected]>
Sent: Tuesday, January 14, 2003 12:35 PM
Subject: Re: RE: [R-390] SSB Converters Diode Bridge

> Food for thought:
> Discussion has been about using common diodes, presumably silicon. I
believe these have about a 0.6 volt drop across them. Would using germanium
diodes, with a 0.1 volt drop, provide more sensitive control? Sounds like a
project to try.
> Wayne H
> >
> > From: "Scott, Barry (Clyde B)" <[email protected]>
> > Date: 2003/01/14 Tue AM 11:25:35 EST
> > To: "R390 (E-mail)" <[email protected]>
> > Subject: RE: [R-390] SSB Converters Diode Bridge
> >
> > As long as I've been participating in this list, I don't recall this
"add-on" being discussed.  It sure seems like a cool thing to try and I plan
to.  I like "elegant" mods like this one...
> >
> > Barry - N4BUQ
> >
> > > All you need is a $.99 Radio Shack full wave bridge
> > > rectifier.  If you've got a
> > > junker power supply lying around, there is likely a capable
> > > bridge in it ready
> > > to use.
> > >
> > > Refer to the back of the RS package.  Route your line audio
> > > to the two AC
> > > inputs of the part, ground the + pin and wire the - pin to
> > > your AGC terminal.
> > >
> > > When copying SSB, you simply crank in a little line audio to
> > > provide additional
> > > AGC action to the set.  You may also wire in a little
> > > resistance to your
> > > liking.
> > >
> > > When listening to AM, turn your line audio to min.
> > >
> > > Elegant.  Wish I'd have thunk of it.
> > >
> > > Back in the day, some guy was charging good money for this
> > > Cracker Jack prize,
> > > selling it as a sophisticated gadget.
> > >
> > > 73 Tom
> > _______________________________________________
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> >
>
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