[Johnson] Automatic Break In TR Switch

Tue, 16 Apr 2002 09:32:49 -0400

One of the tubes has a grid connection to the coax line going through.
Of course the grid conducts part of the rf cycle and does not the
rest. Rectification. That makes harmonics. Need a tuner (in line all
the time) or a low-pass filter between the TR switch and the antenna.

This is getting to be less of a concern in areas with cable or
satellite use.

But if you use the stock TR switch unit, you do need a low pass filter
or something in line while transmitting to keep them off the antenna.

73, Guy.

----- Original Message -----
From: "john_walker_beasley" <[email protected]>
To: <[email protected]>
Sent: Tuesday, April 16, 2002 7:38 AM
Subject: Re: [Johnson] Automatic Break In TR Switch

> Tell me more, please ?
>
> John
>
> ----- Original Message -----
> From: "Guy Olinger, K2AV" <[email protected]>
> To: <[email protected]>
> Sent: Monday, April 15, 2002 6:37 PM
> Subject: Re: [Johnson] Automatic Break In TR Switch
>
>
> > Don't DARE run one of these without a good stiff lowpass filter
behind
> > it. Been there, done that. Urg.
> >
> > Guy.
> >
> >
> > ----- Original Message -----
> > From: "radioman" <[email protected]>
> > To: <[email protected]>
> > Sent: Monday, April 15, 2002 5:33 PM
> > Subject: [Johnson] Automatic Break In TR Switch
> >
> >
> > > Auto breaki-in
> > > Just like a Porsche in a bad neighborhood.
> > >
> > > Transmits 4 kw with 2 recieving tubes and a rectifier..
> > > of course it is all TVI.
> > >
> > > z+ADs-)
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > Johnson mailing list
> > > [email protected]
> > > http://mailman.qth.net/mailman/listinfo/johnson
> > >
> >
> >
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> >
>
>
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