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Re: HP859x Power Supply Schematics
Further update. I've diagnosed the fault on the Control Board, Leaky CR206, as suggested by George. I couldn't find my HSMS-2800s, so have fitted a 5082-2800 until I get some. Now need to sort out the
By Chris Weir · #149919 ·
Re: E4402 help please VCO Unlock.
Thanks, that is just my website : ) I tried collecting information there about the different revisions of RF boards and what LO dividers they use. Would welcome any further data points from E440x
By fenugrec · #149918 ·
Re: E4402 help please VCO Unlock.
Found the source of the screenshot: http://www.qcte.ca/testeq/e440x_sa/ Has info on the replacement module(s).
By Mark Bielman · #149917 ·
Re: E4402 help please VCO Unlock.
Ah, yes. That rings a bell. That newer unit I looked at had that chip. (1GC1-4210) The unit was from work so I decided not to experiment. (I looked at the replacement module as well. It's a good one.
By Mark Bielman · #149916 ·
Re: E4402 help please VCO Unlock.
"Mark Bielman via groups.io" <mbielman@...> writes: I didn't follow the thread closely so ignore me if I write something that was said already. I have an E4407B which also had LO
By Sven Schnelle · #149915 ·
Re: E4402 help please VCO Unlock.
That screenshot may have come from me. I don't have the CLIP handy right now but it's the same one Shahriar used in his videos. (PLL Unlock) I fixed 2 440x units that had the same fault as in the
By Mark Bielman · #149914 ·
89441 Alignment/Test Disk ?
Forum, Next item on the repair bench is a 89441 VSA (~ 1999) The analyzer fails (internal) calibration loop (?) test: [Calibration failure Check front panel cables] The cables are all OK. The
By Ulf Kylenfall · #149913 ·
Re: E4402 help please VCO Unlock.
I just checked my docs, and at some point I stole this screenshot from somewhere ( I definitely don't have the original doc, nor do I know exactly who it came from), but the numbering seems to match
By fenugrec · #149912 ·
Re: E4402 help please VCO Unlock.
Hm interesting. My E4402 (that also doesn't match the Artek schems) has totally different part numbering; there is nothing like? "U54", all is numbered by group spaced by hundreds, so U8xx, U7xx
By fenugrec · #149911 ·
Re: Agilent 16702B Celestica series 7000 PSU
Hi Jeff, did you succeed with the repairs of the 5100 PSU? I have a dead Celestica 5100 power supply, your schematics would be a great help for the repair. I'd be very grateful if you'd publish
By LeonP · #149910 ·
Re: VFD for Agilent 53132A
On the images from eevblog it looks a bit bright in blue, which might bother me. I've got a swatch of filter materials (lighting gels) from Lee filters that I intend to try once it's installed. I've
By Adrian Godwin · #149909 ·
Re: HP859x Power Supply Schematics
An update on my 8591E PSUs. I had thought I still had a fault after replacing the short circuit capacitor. I tested the Output regulator Board in isolation, and found the +/-15V linear regulators are
By Chris Weir · #149908 ·
Re: always-on AC power
I assume you have seen this video on adding a mechanical switch to 53132A? He mentions some reasons that certain options would work better
By Darryl U · #149907 ·
Re: 5345A electronic counter *restoration adventure*
Having overhauled the entire front panel, I still get the exact same results: when I turn on the instrument the asterisk lights up and flashes a 0 with only one dot (I think it is the 4th from the
By RubenRubio · #149906 ·
Re: VFD for Agilent 53132A
I have mine in and working. I like it. I wish they had it in green but it is very bright and readable. Well made. [email protected]> wrote:
By Russell Moore · #149905 ·
Re: 8566/8568 IF/Display unit - Digital section interchangeability between generations?
Don - I have seen some of the RF interconnect cables that do not have ll the coax positions populated - Don't know if they were HP or after market.? I? "rescued" an 8568A that I got for pennies by
By Bruce · #149904 ·
Re: Activate E4403B color screen option
I have found the same format problem with Tektronix oscilloscopes.? It is best to format in the unit. Tom
By Tom B · #149903 ·
E5071C Port Coupler Issue?
At my new job, they have a number of E5071C ENAs that are not working right.? The problem seems to be the same on all of the machines, so I'm assuming that this is a common failure and was hoping
By Scott Vance · #149902 ·
Re: Price of the 54540 oscilloscope
Gianni, I have a printed catalog from 1997 and it has the 54XXX prices on page 99. I also have a printed 1994 catalog. Prices are on page 145: 54520A? $9500 54522A? $13500 *54540A?
By pianovt · #149901 ·
How to recover the video of my graphic 54810-66505 card
Hello, I have picked up an oscilloscope 54810 I have some problems on it, but it’s settled. Meanwhile, I tried to put the graphics card 54810-66505 on another motherboard (which also had its video
By Gerard · #149900 ·