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Peter The first fault was U700 and the series pass transistor on U700 supply that was gone. Replaced that and all the alarms cleared. The 600MHz is still a bit low but comparing the device 600MHz and

Wow a bit ordinary for HP. I am loaning one of those nano spec an that proports to go to 4.4GHz and check the LO and the output of the 1st mixer. Then I will go back in and have a closer look at all

Hi, Just for completeness I will share a couple of pictures of the second converter in a 8563A that I fixed. In the first picture, it was not easy to see the issue: [image: 20180207_223009_s.jpg] I

Hello in 90% cases of that failure your U501 in A15 is dead. It is a 18-19dBm MMIC . Not critical use ERA5 or MSA0586 etc. also if your 300Mhz Cal output is bad it that failure. They look ok still if

Hi Bruce, Although I've used the 8640 for FM alignment on occasion -- with great results -- I wouldn't want to have to use it on a regular basis. The FM modulator doesn't support a large enough

Unless you've got your heart set on spending a lot of money, there are several pieces of non-HP equipment that should do the task just fine: the NanoVNA and the tinySA.? Both about the size of a deck

Hi - I am hoping someone may have an extra push button cap to replace a missing one on my HP3312A.? These button caps were used in many of the 1970's vintage instruments. If anyone would be willing

I worked at a boutique hifi shop for a few years around 2015. I had an 8640 and it was fime for aligning FM tuners, as well as AM/SW and the occasional communications receiver. The shop had a Sound

AskildAfter my email I pulled it apart again and had a good look. Nothing stood out other than some of the soldering looked a bit cold. The feed thrus where ok, nice and shinny.It was interesting

Are you wanting to align IFs or frontends?

Hi Tony, Let's look at what you are doing.? Firstly, I do a lot of FM tuner alignment, and I have an ST1000A.? I don't have a great deal of luck using the double sweep feature, and it isn't a sweep

Hello Nigel, would you have a picture of what you are looking for? I think I have some of these wire stand-offs, if that is what you need... Chris

HP8340B and 8341B will do it. So will the 8340A and 8341A if you can work without FM modulation Quoting Tom Lee <tomlee@...>

SG-165. That’s the Sencore gen I was trying to remember. Slow neurons! Sent from my iThing, so please forgive typos and brevity.

The HP8601A is a good choice. It’s old-school analog. If you’re fussy about frequency accuracy, you’ll want to connect a frequency counter, but that’s easily done. These don’t take up much

Probably hard to find these days, but an 8690 sweeper mainframe with the solid state 8698 100 KHz to 110 MHz plugin should do the job. The 8698/8690 combo has a full range calibrated attenuator on the

Hi Dave, The test port on the second converter should be 3.6GHz (6*600MHz). Normally I think that the first mixer is the part that is most likely to fail, as its exposed to over power or dc voltage

Hello Nigel, If you have not found a complete set of feet , I have some ( brown ) for sale. I am located in France Best regards Eric

Does anyone know of a HP signal generator thats got a sweep section for FM (87.5 - 108 MHz) tuner alignment? The old Sound technology ST1000 was ideal for that but now long out of production but

Hello Eric, Thank you for the information. The connectors are indeed very expensive. I didn’t imagine such high prices. I will see if I can build one in my workshop. For my calibrator it might be