[Amps] 4 X 4-400C or 4 X 3-500Z HF amplifier

[Carl]

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 at bluewin.ch>
To: <amps at 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
>
>
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