COLIN LAMB wrote:

: The 100kc crystals are in tall HC6/U holders. As I recall, it may be an
: HC13 holder. Those crystals were used in receivers of the 50's and 60's
: and kept right on going into solid state.

Thankyou very much, it turn out to be HC6/U the big and HC25/U the small.
If it's of someone interest, in

http://www.kenselectronics.com/lists/cbxtal.htm

there are mechanical drawings of the HC6/U, HC25/U and HC18/U holders.

Ciao,
AB

.... Andrea Baldoni, 2002: messaggio non protetto da copyright.