AnsweredAssumed Answered

Manual search: HP 105B Quartz - late model

Question asked by Uky on Dec 7, 2015
I am looking for the service manual for a 105B Quartz oscillator. This unit was manufactured sometime
in 1988 and is of a late model. Having searched several download sites, including Keysights
having found only versions made around 1970. Since then, the power supply and charging circuitry
has been updated. In the unit I have, the NiCd batteries are gone, and I am considering
replacing them with a more modern chemistry. The PSU circuit board in my unit
is designed using CAD, has five TO220 discrete semiconductors, and a number of DIP-socketed
components not found in the versions available on the internet.

Best Regards