Hello Ray, Thanks a lot for sharing your findings!. I hope more of us will follow your steps and send similar messages; this way all of us will benefit,...
... <snipped excellent repair report> ... Hello Ray, I enjoyed your work report. Excellent reading! That was some battle that you had and you killed the fault...
dear Ray It was nice to read your battle story !! The final pleasure is all yours Hi glad to share it too ! I have been servicing various test equipments for...
... From: Ray Robinson HP8601 FAULT I had an intermittent fault in my HP8601A sweep generator which allowed it to perform normally, then drop in level and...
I'm looking for the GPIB card for a Fluke 5100 series calibrator. The same card is used in the 5100A and B and the 5101A and B. If anyone has a scrap unit...
<<now i am fighting over the power supply stage of a HP8563A. i have no manual and am trying to circuit trace the powersection fully. hope some one can spare...
We were offered the Rigol scopes here at Sphere Research in Canada by the maker in China a few months ago. I guess I'm super glad we turned them down, if...
Greetings, still playing with a 428B current probe. I will put a pdf of the 20KHz ocillator section into the files section for those tube folks who must...
dear John thanks for the information abt the manuals. I have looked it up and will do as suggested. 73 de kumar VU2BGS ... <tt> <<now i am fighting over the...
Greetings, The pdf is at http://groups.yahoo.com/group/hp_agilent_equipment/files/ named as HP 428Bosc.pdf In case no one knew where to look concerning my last...
Dear Colleagues, My HP 8566A Spectrum Analyzer has been acting up on me. I have localized the problem to the RF unit, and more specifically to R-17 (0.82 Ohm...
I scanned the A8 section from the 8566B manual here: http://www.speakeasy.net/~jmiles1/ke5fx/a18.pdf (200K, 7 pages) The assembly designator (85660-60137) is...
Is it possible to repair the attenuator in a HP 8554B RF unit, I have been told by the seller that the 40 dB pad is faulty, anyone repaired one? Thanks Wade...
Wade - I am talking out of my you know what, but, I would think the attenuator in an 8554A would be a simple fix. At those frequencies a good carbon film ...
<snort> You know what indeed. IIRC, the 8554 goes up to a GHz or so. A carbon film resistor, with its helical-cut resistance element, will make an excellent...
While a carbon-film resistor would be a bad idea, a surface-mount chip resistor with suitable (very short) leads soldered on might be usable in non-critical...
Without getting into a pissing contest a resistor (carbon film), and I was not considering the spirally wound ones, would have negligible inductance without...
Alternatively, you can use several surface mount resistors and avoid wire altogether. that would minimize inductance. It would be best to have this combination...
Has anybody concidered grinding the Surface Mount resistor up to the exact value required for the attenuator? Don`t quote me on this, but aren`t SMT resistors...
I've tried this in the past with success using a CO2 laser beam pointing mirrors mounted on a CNC plotter. It has been used to burn away carbon film slices...
I recently made a 40dB attenuator using 1/4 W metal film resistors (RLR07C) as an add-on to an MFJ power dummy load. The dummy load is specified to 650 MHz...
My 8753B works well with 85046A 50 ohm test set. It does not work with 85046B 75ohm test set. It can not switch between the two ports, stuck in one port. Both...
What (if anything) did you use to passivate the element after trimming? This would also be applicable to Don Collie's idea about mechanical grinding, although...
Any experts out there on this one? Wondering if Option 003 can be retrofitted and whats involved? Hardware and firmware, or just the latter? DaveB, NZ -- No...
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