[Heathkit] FS: SB-104 to SB-104A conversion manual

[Sandy and Kees Talen]

I have copies of the SBM-104-2 manual. It states, "The purpose 
of the modification kit is to update your SB-104 Transceiver to 
reflect all the latest Heathkit engineering improvements. When 
the changes are completed, your Transceiver will be identical 
to the Heathkit SB-104A Transceiver". 

I've found the manual to be a great reference to check the level 
of the boards because many were swapped between machines 
over the years. The modifications impact nearly all the boards.

Also included is a copy of SBM-104-1 which improves the 
sensitivity of the receiver section using the older FET "G" board. 

$10 postpaid in the US, a little more elsewhere.

73  Kees K5BCQ

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