I am more than a little surprised at your answer. The RF does NOT appear at
the amplifier any SOONER using RF switching than it does using DC switching.
The timing problem will be identical with either type of switching.
I have used this type of switching for 35 years and have had no problems. I
aquired a Henry 4K back about 15 years ago that was almost toast. When I
rebuilt it, I used RF sensing and still incorporated sequencing the relays.
That amp is still in use at a friends shack in Turlock, California.
Billy Dean Ward
>From: "Tom Rauch" <w8ji@akorn.net>
>Reply-To: W8JI@contesting.com
>To: amps@contesting.com, "Billy Ward" <billydeanward@hotmail.com>
>Subject: Re: [AMPS] Gound fault
To: <amps@contesting.com>
>Date: Fri, 10 Aug 2001 08:30:28 -0400
>
> > Since this is a product specific product wirh a product that I have had
>no
> > experience with, I am lost! However, if it turns out to be complex, you
> > can do a simple thing with one transistor as an RF sensing switch.
> >
> > I will send you the circuit that I designed many years ago if you need
>me
> > to.
> >
> > Billy Dean Ward
>
>The last thing in the world anyone should do with an HF amplifier is
>use an RF sensing system to switch the thing!
>
>Timing problems are bad enough without waiting until RF appears
>to transfer the amplifier relay!
>
>I don't understand the problem the person described. The Drake
>has an internal supply for the relay. Why does it need external 12v?
>
>
>
>
>73, Tom W8JI
>W8JI@contesting.com
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