Hello All,

I am in need of the power supply and oscillator schematics for an HP
651B I am repairing. I have a service manual but it is for an older
model than mine. My unit has a serial number of 811-03132.

Can anyone help me out with a scan of the 2 foldout pages for this
oscillator? I would really appreciate it. It is not significantly
different from the older unit, but it appears that Si transistors
replace the Ge units seen in the manual I have. To make matters
worse, someone has been in there and made some changes/repairs that
appear to be less than professional! Not sure anymore what are
original parts and which have been changed! The parts pages which
describe thea transistors and diodes used would also be helpful.

Any help would be appreciated.

Thanks,

Mitch

开云体育

Hi Scott,

That would be great. Thank you so much

Mitch

--- In hp_agilent_equipment@..., "Scott" <scott@m...>
wrote:

Hi Mitch,



I have a 451B service manual somewhere. When I find it I'll be

happy to scan

the schematics and send them to you.



Scott





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-----Original Message-----
From: aquaman8_2001 [mailto:aquaman8_2001@y...]
Sent: Friday, November 14, 2003 12:37 AM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Schematic for HP651B



Hello All,

I am in need of the power supply and oscillator schematics for an

HP

651B I am repairing. I have a service manual but it is for an older
model than mine. My unit has a serial number of 811-03132.

Can anyone help me out with a scan of the 2 foldout pages for this
oscillator? I would really appreciate it. It is not significantly
different from the older unit, but it appears that Si transistors
replace the Ge units seen in the manual I have. To make matters
worse, someone has been in there and made some changes/repairs that
appear to be less than professional! Not sure anymore what are
original parts and which have been changed! The parts pages which
describe thea transistors and diodes used would also be helpful.

Any help would be appreciated.

Thanks,

Mitch






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