[R-390] Tube Extenders

[Peter Cade]

I sympathize.....I made some myself.
There are probably better ways, but this is what I did....

You need two 7 pin and two 9 pin tube sockets, and a couple of
trashable tubes.

1.  Remove the attachment skirts from all of the the sockets, and clip off
and
     completely remove  the pin connectors from one each of them.

2.  Carefully break the vacuum of the tubes by clipping off the evacuation
     tip, then with a pair of dikes break off all of the envelope down to
the
     button base (this is easier to do, and less dangerous than it
sounds....).

3.  Clip off the connections to the internal electrodes, leaving the base
     with the pins  and their internal extensions.

4.  Cut 7 (or 9) 3 inch lengths of stiff bare copper hookup wire.

5.  Solder these to the pins of the uneviscerated sockets, then bend them
all
     down so  that they are parallel.

6.  Push the free ends of the wires through the open pin holes in the other
      socket. - doesn't matter which way round the socket is, since it just
acts as
      a spacer and support. Let them protude through the other side by about
     1/2 an inch.

7.  Trim the wires to equal length, and carefully  solder them to the
      internal pin  extensions on the tube base (the pins are usually iron,
so they'll
     solder easily)...

8.  Apply clear Duco cement or something similar to the spacer socket to
      hold  everything  firmly in place.

You end up with an extension with a tube socket at the top, and a genuine
tube  base at the bottom... plugs in easily, and you can clip leads to the
bare
wires..

Good luck...!


----- Original Message -----
From: "John Multer" <multerj@bytehead.com>
To: <R-390@mailman.qth.net>
Sent: Thursday, January 03, 2002 5:20 PM
Subject: [R-390] Tube Extenders


> I am looking for 7 and 9 pin miniature tube extenders to make work easier
on
> my R-390 IF deck.
> I remember a athread about these some time ago but can't fine it.
> Fair Radio does not have any at present.
>
>
> _______________________________________________
> R-390 mailing list
> R-390@mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/r-390
>