[Collins] Diodes in a 651S-1

[Ian McLean]

Hello every one.
I have a request for information regarding the diodes
used in the preselector used to switch the filters.
I do not have the manual and am "flying blind" on
this, so bear with me.
The unit in question has the nixie tubes and is serial
No. 659 if that helps. Previous owner may have
tranmitted into the unit and taken out most of the 20
diodes in the A6 module, P/N 790-1048-100, CR105 thru
CR138 shorted or open, either that or a lightning
strike! 
What is the type No. and/or part No. of the diodes?

Thanks.

73, Ian, VK3JQ

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