Robby,
The RF-104 is not normally set for "ground keying line to tranmit" operation.
However all that's needed is a 1N914 or similar diode inserted in the Program
and Junction Board behind the front door. (REAL Amplifiers have doors!)
See my website.
http://www.g4ftc.co.uk/amplifiers/rf104/home.htm
Also at the bottom of the page are details of what pins on the D type
connectors at the rear are the keying line.
I'm a bit curious about the parasitic suppressor. The amplifer should have one
fitted as standard - see the photo at the top of the webpage and it's the large
black tubular resistor attached to the top cap of the tube pointing to the
right. There is actually a wire running down the centre of the resistor which
is the inductance. I've never seen any parasitic problems with mine.
Hope this helps.
73s David G4FTC
> From: robby@route2.pe.ca> To: amps@contesting.com> Date: Tue, 27 Nov 2007
> 14:43:07 -0400> Subject: Re: [Amps] Amps Digest, Vol 59, Issue 56> > Actually
> my basement is grade level on the side that faces the water so I> can watch
> the water skiers and salt water vertical :-) It was a challenge> even so. I
> am not sure of the history of this amplifier so I am not ready> to plug it
> into the wall. I have a 3-1000Z parasitic suppression kit from> Richard and
> will see about installing it or perhaps part of it. There was> no glitch
> resistor with the kit for some reason. It is not known how the amp> was keyed
> up (PTT) but there are a couple of DB25 connectors on the rear. I> guess I
> need to spend some time reading.> > 73,> > -Robby> > -----Original
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