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The recent discussion mentioning "conductive foam" reminded me of a serious potential problem to watch for. I had an old Gigatronics 600 series sweeper in which they had used pieces of conductive

Hello Chuck, That's good news. I've seen various of these units with that message and it's always been an issue with the backup cell (or the test jumper)....! Best regards, Ron Wilkinson mi-Biz

Thanks for the advice Karl; I'll give it a try. Gary

I'd think pretty good. Anyway, this might interest you - a review of the 3457A. Part 1 seems pretty good - I've not seen part 2, but I'm going to take a

I used an Sa612 mixer chip feeding a LM3089 into a 386 audio amp chip. That setup is cheap and can be configured to give am and fm but no ssb. The best solution is to find a used AOR 8000 wide range

Conductive foam:? I have found the torque on the mounting screws needs to be near perfectly?equal for these to work. Lots of trial and error :-) As for the switch contacts, I have found it is a

Subject pretty much says it all really. Email me photos of the actual item if you have one to sell. Please ensure there is a spoon in several of the pictures so I can actually see you have the

Rbw is a little wide at 2.6kHz. But interesting for cheap sigint maybe 73 Eugene W2HX

It was the former Ken. You made it clear, but I mis-read it. That's pretty damm cheap for a spectrum analyzer. You were perfectly clear - it was entirely my mistake. Dave

Ron, It was the test/normal jumper, guess I moved it after I set the unit aside and forgot to move it back. Chuck

Howdy. ?In my brief poking around inside he RF unit, I did not notice anything that looked like a YIG, but I wasn't looking for it. ?I doubt it's got the mod though. ? What is the failure mode of

Howdy. ? Nope, only one RF unit covering the range from 0.01 - 12.4 GHz (and higher with external mixers), in multiple bands. Some of the 8551 units had a mixer diode that could be replaced via the

Hello, I'm hoping a list member can help. I have what looks like a new CRT tube in its original box. The HP part number is 5083-9025 and it has a rectangular face. I had thought that it was for a

Hello Steve, even using resistors of utmost precision you would neither obtain a 600 ohms input resistance (= load resistance for the TG) nor a 50 ohms output resistance (= source resistance for

bad connection(s) to the solenoid winding? --doug

Ron, I did replace the backup cell, in fact one of the first things I did. I'll check the battery again and also make sure I didn't move the jumper to the test (disconnected) header pins while I was

The drive voltage is nominal under load. Are you suggesting I compare the coil resistance to a known good device? By what mechanism would the coil resistance increase - metal fatigue? Fred

Hello Chuck, That message is usually caused by the A2B1 3.6V Lithium backup cell on the A2 CPU board needing replacement.... Regards. Ron Wilkinson mi-Biz Systems Pty Ltd Perth - Western

I've been restoring a 3562A analyzer for a couple of months I bought it off ebay relatively cheap as it had some water damage. It's working fairly well now, but I have a couple of startup errors, one