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Date
Re: FM Tuner alignment generator?..
Hi, Recently I was using my 8645A for tuner alignment (a Mcintsh MR71 tube tune). I tried all sorts of methods - the 8645 can sweep the FM range with an FM modulated signal on top of it. Finally, for
By Martin · #122389 ·
Re: 54717A Calibrator
Here the best i can do , i dont have pro tools https://postimg.cc/MX9MrCRp https://postimg.cc/DWC3KPcL front and rear
By boddax@... · #122388 ·
Re: 8560E Second Converter
Hi Dave limits needs to be accurate as the level is used in doublers too low does not work. best regards Peter ________________________________ Fra: [email protected]
By Peter Hansen · #122387 ·
Re: 8640B - No Count
Brian Hope yours is as easy to fix as my loaner unit. Traced the internal and external count through the counter chain (was worried the ECL chips had failed but they are all good) up to the counters
By Dave Ireland · #122386 ·
Re: 8560E Second Converter
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
By Dave Ireland · #122385 ·
Re: 8560E Second Converter
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
By Dave Ireland · #122384 ·
Re: 8560E Second Converter
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
By Askild · #122383 ·
Re: 8560E Second Converter
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
By Peter Hansen · #122382 ·
Re: [HP-Agilent-KI eysight-equipment] FM Tuner alignment generator?..
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
By Tom Lee · #122381 ·
Re: FM Tuner alignment generator?..
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
By Jim Allyn - N7JA · #122380 ·
Looking for an extra Button Cap for HP3312A Restoration
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
By Jim Flanagan · #122379 ·
Re: FM Tuner alignment generator?..
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
By greenboxmaven · #122378 ·
Re: 8560E Second Converter
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
By Dave Ireland · #122377 ·
Re: FM Tuner alignment generator?..
Are you wanting to align IFs or frontends?
By Jim Allyn - N7JA · #122376 ·
Re: FM Tuner alignment generator?..
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
By bhome1959 · #122375 ·
Re: Looking for HP3478A feet
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
By ChrisBeee · #122374 ·
Re: FM Tuner alignment generator?..
HP8340B and 8341B will do it. So will the 8340A and 8341A if you can work without FM modulation Quoting Tom Lee <tomlee@...>
By Bruce · #122373 ·
Re: FM Tuner alignment generator?..
SG-165. That¡¯s the Sencore gen I was trying to remember. Slow neurons! Sent from my iThing, so please forgive typos and brevity.
By Tom Lee · #122372 ·
Re: FM Tuner alignment generator?..
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
By Tom Lee · #122371 ·
Re: FM Tuner alignment generator?..
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
By Dave Brown · #122370 ·