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I believe these are the common HP design with solenoid coils driving two plungers that switch the pads in and out. If you have not overloaded the 10 dB section, then likely the problem is with some

Hi All, Have a 3455A 6.5 digit multimeter that I have finally gotten up and running after some hiccups.? While trying to go through some of the cal procedures, I have found the unit does not stay

Hi all,?The HP 3322HB 110 dB programmable attenuator in my home lab 8671B 2-18 GHz Generator has developed a bad 10 dB section. Is this repairable if disassembled? Does anyone have one they'd be

I found a box of 20 brand new in the box CINCH Model 50-20SN-1 connectors which are used in a lot of HP etc test equipment. I was able to find them on Digikey and Allied etc for about $4.50/ea. Here

I'm a little confused by that, if I remove A70 and close the switch and it then the unit runs a proper CAL, wouldn't that say A21 and A22 were good? Thanks, Lamont P.S. I'm

The keypad switches have a leaf spring that has to buckle in order for the switch contact to actuate. Those that make a loud and forceful clunk have sticky grease that is effectively gluing the leaf

Lamont, Associated circuitry in A21, A22, would also need to be verified before you conclude defective A70. Dennis --------------------------------------------

I have not noticed any dead keys, but I'll run another check. I have some that click with slight force and others that work but don't click. Thanks, Lamont

I have an A70 board, so not a switch problem, I have removed, wiped doen the edge connector, it already looked good and reseated it. That didn't help. As a troubleshooting method can I remove the A70

I’ve done the connector change and, using a good quality SMA, I have two 5342As that count reliably to 26GHz and one that just won’t count reliably above about 21GHz. I don’t have a 5343A to

Hi Harke, oh, interesting. So the upgrade to 26 GHz, which would actually be a 5343A, changes only the connector? :-) This is funny, because I use a HP 8563E spectrum analyzer at work, which operates

Hello Tobias, Congrats on the repair! Happy for you the sampler was fine! I can only comment on the frequency range. I have a number of HP equipment (including the HP5342A) that are spec'd to 20-22

The connnector on the higher frequency model was 3.5 mm, not N. I don't know if there are other changes

Hi all, problem solved: as I said, the counter was counting fine on the low frequency input, but on the high frequency input, it displayed only zeros. The reason was that a) the -5.2V operating

Tobias, As G?ran said, 8568 and 8566 are different design. I have no knowledge of 8568 so I can only speak for 8566. In 8566, if the frequency span is less than 5mhz, YTO is phase locked during the

I tried an external reference without luck. I guess it is time to dig into the problem.

Perhaps I was misunderstood. ?When I said a small sample of the desired color, I mentioned an inch and a half. ?That was a minimum size. ?I have taken entire front panels in for matching without a

One thing to note, is when the keyboard springs fail, the button feels dead, but can get stuck in a depressed position, which bothers the power on self test. If you have any dead keys, fix them

Thanks, I'll try the external ref. I have a 3586b sitting next to it and that has the 10Mhz Oven in it. Maybe I can just run that in? I haven't checked the 3586B output and the input into

First try the external reference again, to be sure whether the internal one is OK or not. In my experience, the (Ovenaire brand as I recall) OCXOs used in the 8566s have been quite unreliable (ovens