AndyS wrote:

Andrea Baldoni wrote:
Hello.
I want to know the name of the form factor of some old quartz crystals, used
in many receivers as 100KHz marker as well in many transmitters as frequency
generators...
They are similar in all respect to the small plug-in quartz used in
transistor based oscillators, used also these days in the solder-mount
thin-pin version, but are more or less double length, height and width.
The 100KHz version is also again double tall.

I have not one here for giving more precise measures, but I'm sure everyone
understand what I'm writing about... it has to be a standard because I have
a quartz tester with the two sockets: for the big and for the small...

Also, how to name and where to buy the jacks matching a 7-pin miniature tube
socket? It's in use as the accessory port of the FT-220 yaesu.
And how about the 11 pin (not miniature) version, accessory port of the
FT-277?

I may be mis-remembering, but the term FT-243 comes to mind....
I believe that is the size that fit in the DX-40 and others......but

There are FT-243 and FT-241 crystals; they have the same form factor,
but the FT-243 has a front plate that comes off, while the FT-241
opens from the bottom. In the FT-243, the quartz plate is not silver-
plated and soldered to the connector pins; in the FT-241, it is.

Both FT-241 and FT-243 crystals will fit in an octal socket.

--
Mike Andrews, W5EGO

Tired old sysadmin