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Date
Re: HP 5342A processor board
Jim, There is a possibility that one of the ROMs might be bad. You may be able to get the code from Blue Feather Tech and burn new ROMs. If the CPU is getting it's clock and the reset is good, you
By Didier Juges <didier@...> · #5419 ·
Re: HP 5342A processor board
Many years ago with microcomputers which came with low quality sockets, I had an assembler remove the sockets and solder the ICs in directly. That eliminated intermittent crashes in some 24/7
By DON CRAMER <donlcramer@...> · #5418 ·
Re: HP 5342A processor board
--- Didier Juges <didier@...> wrote: Hi Didier, Thank you for the suggestion! I had already tried removing/reinserting the CPU which is the only socketed chip. I had even painted its legs with
By Jim Miller <jcmco@...> · #5417 ·
Re: HP 5342A processor board
Jim, Have you tried the obvious of pulling and re-inserting the CPU and ROMs (and any other chip on socket)? My 5370A has needed that treatment at least 3 times, in spite of Deoxit ProGold. Each time
By Didier Juges <didier@...> · #5416 ·
HP 5342A processor board
Hi, I am repairing a 5342A counter that has a bad A14 processor card. I have traced the problem to the CPU board by trading cards with a known good unit. Are there any common failure modes with this
By Jim <jcmco@...> · #5415 ·
11867A RF Limiter
Looking for this or other similar limiter to protect my 8555A first mixer from damage. Cheers, and thanks!...........................Don Collie jnr. P.S. : my email is : donmer@...
By Don Collie <donmer@...> · #5414 ·
Re: HP8568B Display Intensity?
That's a good point... or an HP 1332A display might work as well, considering that's where the 85662A's CRT was originally employed. You can also use SSM (http://www.ke5fx.com/gpib/ssm.htm) with any
By gleamfollower <jmiles@...> · #5413 ·
Re: HP8568B Display Intensity?
The display on my 8568B has been weak since I purchased it. I usually use an external Tektronix X, Y, Z display. Because the 8568B generates it's own graticule, the display is accurate. This may not
By k6yaz@... · #5412 ·
Re: BAMA scaling back
That is not as a result of storage limitations, it is due to the site owner changing jobs and losing access to a super-fast internet connection. So he can't tear submissions off, reformat them and
By Craig Sawyers · #5411 ·
BAMA scaling back
Fellow techies in all groups (that I subscribe to), I just found the following on Usenet from BAMA's owner. It seems that storage is becoming a problem for him. I'm posting this to all four groups I
By Bruce Lane · #5410 ·
Re: HP8568B Display Intensity?
You can play with the INT LIMIT control on the Z-axis board, but it will probably not help much. That is a classic weak-CRT symptom. Does it look like the first photo at http://www.ke5fx.com/crt.html
By John Miles <jmiles@...> · #5409 ·
Re: HP8568B Display Intensity?
<david_woodhead@...> wrote: When I trace there Here's a little more info: The front panel command to intensify the graticule for photography works but all I see is the graticule. It completely dims
By David Woodhead · #5408 ·
First mixer for 8555A [141T Spectrum Analyzer System]
Hi Group, I`d like to obtain one first mixer for my new/old H/P 8555A plug - in for my 141T Spec/An. Does anyone have one that they don`t want? Ideally, I`d like a fully working one, but non - working
By Don Collie <donmer@...> · #5407 ·
HP8568B Display Intensity?
Just acquired an 8568B and have questions.... The graticule is a little out of focus and appears to be over intensified. The trace and on screen characters are very crisp. When I turn down the
By David Woodhead · #5406 ·
Re: Reseting 3325A
make shure that all the screws holding the pcb's are tighten, most of the grounds are closed thru the screws and the chasis.
By elie_shvarzman · #5405 ·
Re: Wanted: 8505A Network Analyzer Manuals...
Hi Mike, I have a paper set now. It is the other guy that needs a set. -Chuck Dr M J DiGirolamo wrote:
By Chuck Harris · #5404 ·
Reseting 3325A
Dear list members, I own a 3325A, a nice function generator, however it has an intermittent fault, it resets sometimes, usually it does that during warmup, but once in a while it also resets after a
By pe1fbo · #5403 ·
Re: Wanted: 8505A Network Analyzer Manuals...
Hi Chuck, I have a set on microfish. Do you have a reader? 73, Mike, W4XN -----------------
By Mike D. · #5402 ·
Re: Wanted: 8505A Network Analyzer Manuals...
Hi Glenn, Yes I did! I paid something over $350USD for a set of 8505A originals. They come in three, 3 inch, 3-ring binders, and about 50% of the pages are fold out schematics. Each binder is packed
By Chuck Harris · #5401 ·
Re: Wanted: 8505A Network Analyzer Manuals...
Hi Chuck, I just picked up an 8505A myself. Did you ever get a copy of the manuals for your analyzer? I'm looking for a set myself. -Glenn <cfharris@...> wrote:
By glenn_briceno <glenn_briceno@...> · #5400 ·