Phil Clements
410 VZ CR 4903
Ben Wheeler, TX 75754
----- Original Message -----
From: Steve Thompson <rfamps@ic24.net>
To: <amps@contesting.com>
Sent: Wednesday, May 10, 2000 2:31 AM
Subject: Re: [AMPS] 50MHz 8877 amp. plate circuit
>
>
> -----Original Message-----
> From: Conrad Farlow <conrad.farlow@virgin.net>
> To: amps@contesting.com <amps@contesting.com>
To: <amps@contesting.com>
> Date: 10 May 2000 01:30
> Subject: Re: [AMPS] 50MHz 8877 amp. plate circuit
>
>
> >
> >
> >----- Original Message -----
> >From: Phil Clements <philk5pc@tyler.net>
> >To: Chris Tran GM3WOJ <gm3woj@talk21.com>; <amps@contesting.com>
> >Sent: Monday, May 08, 2000 6:55 PM
> >Subject: Re: [AMPS] 50MHz 8877 amp. plate circuit
> >
> >
> >>
> >> Hi Chris,
> >> Duplicate the design at http://user.super.net.uk/~equinox/8877.html
> >> I have used this design several times, and it worked every time.
> >> The plate choke is very critical here...that may be messing up your
> >> anode circuit.
> >> Good luck!
> >> (((73)))
> >> Phil, K5PC
> >
> >I've copied this twice and its worked perfectly and the best input match
> >I've ever seen.I used jennings Vac variables on tune and load and
> everything
> >worked perfectly.
> >
> >73 de Conrad G0RUZ
> I couldn't access the original today - did it use a vacuum loading cap? I
> fthat's the case, the one I'm trying to fix isn't a real copy and the
> inductance in the loading cap might be the problem.
>
> Thanks,
>
> Steve
No, it did not use a vacuum cap for loading. I have used various caps
up to 500 pf with no problems. I think you will find your problem is between
your anode and the coil....i.e., plate choke, blocking cap. strapping, spacing,
tune cap, etc.
GL!
Phil, K5PC
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