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I am looking for an IC chip that goes into a HP 5335A Counter, specifically on the A9 board (option 030), which is the 1.3 GHz INPUT C. The part number is 5088-7036, and it is a round 4-pin 1.6 GHz

Hi Daun, Message sent. Jim

Hello Anonymous, Applause for the packing advice to vendors. I find that for vendors who keep advertising at OTT prices, a little note wishing them well with their exorbitant price and an estimate of

Actually, I only buy on eBay, never have sold. I absolutely demand this type of packaging and typically message a seller beforehand to make sure they can follow my request. I have even had them send

Hi Ed, Oh, one more thing: Have you checked the Test/Run jumper at J36? -Chuck Harris ed beers sreeb@... [hp_agilent_equipment] wrote:

Hi Ed, I think it might be best if I just shut up now.... I have been having trouble with my eyes, detached vitreous humor makes for some killer floaters. Since your brain tries to automatically fill

I assume the isolation logic works since test 3 passes. ALE synchronizer works. FRAC logic appears to work. That doesn't leave much besides the 8048. My manual shows U9 to be a 74ls375. Pin numbers on

If yo are not a member, I would suggest subscribing to and posting on the Time Nuts mailing list for answers of this sort. They are the real hardcore timing and GPS group. There is also a wealth of

Anyone have a good copy of the Avcom PSA 65A spectrum analyzer. service manual. My unit has been powered off for about 15 years. Does not sweep - and display not tracking frequency . Thanks in advance

Hi Ed, Sorry, I missed the part of your post about your having swapped A30, it was late. I agree that the problem is most likely on the A30 board. I still think it unlikely that the microprocessor is

The main cpu board looks newer than the rest of the boards and has a single u7 27xxx rom. My other unit is newer and also has a single rom. Which brings up a new question. I hadn't given any thought

The failed unit has serial 2015Axxxxx. It has the fan and filter. The main cpu board looks newer and has a single u7 27xxx rom. The problem A30 board is all digital appears to use only 5V which looks

What is the serial number range of your 3456A? (Does it have the mesh and black plastic filter, or the TO-3 on the rear panel?) ?The early "filter" versions tend to have bad ROMs, but all can have

Yes I looked at the power supplies. 5V is at 5.04V with ~100mV p2p of high speed noise. Interestingly, I see no ceramics that might reduce this. Since my good A30 works on both boxes and my bad A30

It gets to be a bit like a broken record, but have you checked the power supplies for voltage and ripple? The 3456A is getting old, and many of the axial leaded filter capacitors in the power supply,

I have a recently acquired 3456a. On power up it indicates overload and it fails self test 4. After poking around the A20 (A/D Converter) board, I concluded that the analog circuits seemed to be

Peter, I was writing only for parcel delivery in USA. Even to Canada mailing is expensive. eBay has an international shipping program but it probably doesn't save you in the UK any money. I've looked

This is pretty amazing! A few weeks ago I was going through some “leftovers” as I was cleaning my workshop, and I came across a ROM/RAM board for the 70900 that I had from my days at HP. Even more

It would be nice if such a service was also able to treat packages better.

Jeremy, When I look at Ebay items from the states, the cheapest postage for even tiny items is around $20US whereas I can ship small items from the UK or Europe for around $5 so Im afraid they are not