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Re: HP 54512B (pair) repair
Hi Radu, I think the PSU in all 545xx series was made by Boschert Inc. and someone already reverse engineered it. I attached the file. I hope it helps. Regards, Razvan
By Razvan Popescu · #150619 ·
Re: HP 54512B (pair) repair
Going back to my -12V rail issue, the SM advises loading the 5.20V rail with a 2ohm/25W resistor. The only way I can put something similar together with what I have at hand is using these dummy loads
By Radu Bogdan Dicher · #150618 ·
Re: HP 54512B (pair) repair
One of the two scopes is completely disassembled - head exploding emoji - and I have the old battery desoldered after confirming it's fully depleted. I enclose pics with what I'm using for
By Radu Bogdan Dicher · #150617 ·
Re: E5052A Power On Test (3.3V Bus Supply)
Watching this subject with interest.? Leo, you may want to check out OEWaves, Synergy Microwave, and Holzworth Instrumentation (now part of Maury Microwave) for ultralow PN sources and Rohde &
By Jim Ford · #150616 ·
Re: HP 54512B
I don't believe at this point HP was providing component-level Service Manuals anymore. I'd love to see one and prove myself wrong, though. Radu.
By Radu Bogdan Dicher · #150615 ·
Re: HP 8660B/86602B developed output stability problem, getting-started suggestion(s) request
Gary, WB2UAQ --- the advice to make adjustments while the board(s) are enclosed is right on (seeing the solenoid coil on the VCO board helped me see why toroid inductor self shielding property is
By David Feldman · #150614 ·
Re: 3708A Noise and Interference Test Set - Looking for a Service Manual
Someone must have scanned it, as there is a 3708A on feeBay listed with a CD of software & documentation, probably doesn't help much as you don't want another unit to go with
By factory · #150613 ·
Re: Manual for HP 466A amplifier
John, if you’ll share your email address with me, I’ll send the schematic. Jeremy N6WFO [email protected]> wrote:
By Jeremy Nichols · #150612 ·
Re: Manual for HP 466A amplifier
Good point. I’d rather patronize Artek and save us both time and money. Jeremy N6WFO [email protected]> wrote:
By Jeremy Nichols · #150611 ·
Re: Manual for HP 466A amplifier
David, The Artek manual for 466a is actually 00466-90003.? There's a typo on the website, I'll let Linda know. It's for serial prefix 226 with backdating for 210, 044, and 019 prefixes. Ron
By Ron · #150610 ·
Re: Manual for HP 466A amplifier
Dave, The Artek manual for the HP 466A is for serial number prefix 226. Ron
By Ron · #150609 ·
3708A Noise and Interference Test Set - Looking for a Service Manual
Hi, I just pulled my 3708A off the shelf for a bit of a spit polish ready to sell it off and I'm looking for a service manual for the performance test and calibration procedures. I can't seem to
By Jared Cabot · #150608 ·
Re: HP Agilent 8753ES VNA repair [Help]
Hi, Starting point VCXO are correct frequency with 40.000MHz. At TP20 you have a frequency of 39.100MHz, and at the output of divider 40 you get 977.5kHz. This indicates, that the divider by 40
By Yves Tardif · #150607 ·
Re: Service manual scan post processing
wrote: A very useful amount of cleanup can be done simply by comparing each pixel on its own to the average of the wide neighbourhood pixels. That works equally well for text and schematics, since it
By Tom Gardner · #150606 ·
Re: Service manual scan post processing
At the museum, we use ITU-T T.6 (Group 4 FAX), which is lossless and very effective. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
By Dave McGuire · #150605 ·
Re: Manual for HP 466A amplifier
I don't mind getting it scanned at the museum, but does it still make sense to do that after the revelation that Artek has it available? I hadn't checked before; I had assumed the OP had already
By Dave McGuire · #150604 ·
Re: Manual for HP 466A amplifier
I've got one of those amps and would like the schematic also. -- John Griessen
By John Griessen · #150603 ·
Re: Service manual scan post processing
While we seem to all agree that JPEG compression is not ideal, there ARE lossless options for TIFF and thus PDF formats.? While yes, storage and networking and processing and scanning time is all
By Bert · #150602 ·
Re: HP 3403C True RMS Voltmeter display fault
Yes, that's why I wanted to see a picture. I've never seen the ball-of-molten-tantalum failure on anything other than a dipped unit. Seconded. -Dave -- Dave McGuire, AK4HZ New
By Dave McGuire · #150601 ·
Re: HP 3403C True RMS Voltmeter display fault
The manual on the web gives type 150D for C1 & C2 on A7, these are hermetic sealed solid tants, of course they might have been replaced with a bead or the disguised bead in an axial or radial block
By factory · #150600 ·