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This manual is supplied for use with both the 200A and 200B Audio Oscillators having any serial number below about 41,000. In oscillators with very low serial numbers the values of a few of the parts differ from the values given in the parts list and schematic diagram, for example: In oscillators with very low serial numbers,
-hp- Part No. 201 C-906. MODEL 201C. AUDIO OSCILLATOR. Serials Refixed: 0961 A. Appendix C, Manual Backdating Changes. adapts this manual to Serials For entire gear assy replacement, use current gear assy, hp- Part No. 200AB-36B. Gear (32 pitch); 200AB-36C Gear (32 pitch); 2AC-100Y shaft with gear (32.
I have an HP 200AB serial number 606-20937 that I picked up for a good price. Comparing it to the service manual and schematic I found on line for units with serial numbers 7725 and above I see that mine must be a later model since the tube line up is different. Mine uses a 6AU6 rather than 6SJ7 and a 6AQ5 rather than
for the Series 200 Audio Oscillators. Click on picture or link below for a PDF (2.5 Mb) of the original instruction manual published in 1943. The manual include schematics, parts list, and chassis layout of the four different models produced by HP in 1943. Instruction Manual for Audio Oscillators HP Model 200A, 200B, 200C
This was a great buy-- the 200AB was in EXCELLENT shape, looked like it was made yesterday. Except NOTHING is made with this amount of quality and attention to detail these days! I like the 200AB and use it all the time in accomplishing tube amp repair. With the old school manual with detailed parts lists, schematics,
HP manuals. model number, Description, link. 200AB, audio oscillator, 200AB manual.pdf Among the many little accessories HP made to go with their instruments, which are generally fairly rare nowadays, were various slide rules, made out of a high density cardboard like substance, which could be used to avoid many of

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February 2018