To use a 8877 in a 4CX1000A socket you have to shorten the
center pin. It will bottom out in the 8877 tube. But after doing that
you can still use the 4cx1000A tube ( but not in GG naturally).
73
Bill wa4lav
At 10:44 AM 12/15/2010 -0500, Carl wrote:
>Looking at the 4CX1000A and 5CX1500A sockets I believe the breech lock
>components of the 4CX1000A/4CX1500B socket can be adapted. The 3CX1000A7
>socket also uses the same components.
>
>Once the suppressor ring is firmly attached to the chassis then attach the
>remaining components from underneath and using at least 2 connections for
>the filament.
>
>This doesnt make for easy removal so also investigate the possibility of
>modifying the socket. Those sockets appear to be fairly common in Central
>and South America as obsolete FM and military transmitters are scrapped.
>
>Carl
>KM1H
>
>
>----- Original Message -----
>From: "Angel Vilaseca" <avilaseca@bluewin.ch>
>To: <amps@contesting.com>
>Sent: Wednesday, December 15, 2010 8:26 AM
>Subject: Re: [Amps] 4 X 4-400C or 4 X 3-500Z HF amplifier
>
>
> > Hi,
> >
> > I bought a NOS 5CX1500A. I plan to use it in an HF amp.
> >
> > Sockets for this tube are rather scarce. Has someone tried to use it in
> > a home-made fixture?
> >
> > I know, a tube is supposed to be used in the original socket, but this
> > is HF, not VHF or UHF, and there is the example of another ceramic tube,
> > the GS 35B, for which there is simply no socket available.
> >
> > So, provided the ceramic isolators receive enough airflow ( maybe I
> > could use a couple of small computer fans) and connections and
> > decoupling caps leads are kept short, could this work?
> >
> > Anyone tried this before?
> >
> > Vy 73
> >
> > Angel HB9SLV
> >
> >
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
>
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