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Re: New Spectrum Analyzer Discussion
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
By David Kirkby <david.kirkby@...> · #48515 ·
Re: 3562A Analyzer
Ron, It was the test/normal jumper, guess I moved it after I set the unit aside and forgot to move it back. Chuck
By ChuckA · #48514 ·
Re: HP 8551 Spectrum Analyzer FS or trade?
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
By Daniel Koller · #48513 ·
Re: HP 8551 Spectrum Analyzer FS or trade?
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
By Daniel Koller · #48512 ·
Help in identifying 5083-9025
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
By Norman Thompson <norman.thompson@...> · #48511 ·
Re: HP 11660A Shunt for HP 8556A
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
By martin_u_fischer · #48510 ·
Re: DIY: Repair of HP Step Attenuators
bad connection(s) to the solenoid winding? --doug
By doug · #48509 ·
Re: 3562A Analyzer
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
By ChuckA · #48508 ·
Re: DIY: Repair of HP Step Attenuators
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
By ffierling · #48507 ·
Re: 3562A Analyzer
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
By Ron Wilkinson <mi-biz@...> · #48506 ·
3562A Analyzer
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
By ChuckA · #48505 ·
Re: HP 8551 Spectrum Analyzer FS or trade?
In theory, but I have yet to find one with the YIG mod. Or, to be more accurate, most people selling them only have the main unit, or it and a display, but none of the cables or filter- they don't
By d.seiter@... · #48504 ·
Re: HP-IB / GPIB Printer Emulator
I found a distributor web site in Germany that shows the product: http://www.stcsweb.de/eng_oldiesmicroplot50a.html I also remember that it did a good job, except that it didn't know what to do
By pianovt · #48503 ·
Re: HP-IB / GPIB Printer Emulator
Martin, Before I found 7470.exe, I used to print to a laser printer with a standard parallel port. I used an adapter made by a company called "Intelligent Interfaces". I think it was called
By pianovt · #48502 ·
Foam conductor problems
I've added some pictures under "3561A repair" to document a problem with my SA. All the electronics check out after replacing some parts but some of the buttons and most of the LEDs were not working
By John McClung · #48501 ·
Re: 3457a on the way
I had one, and it was a good meter. I sold it to a friend, who has never used it, and now I need it, so he is going to sell it back to me. Neither of us can remember what I charged him for it first
By David Kirkby <david.kirkby@...> · #48500 ·
Re: DIY: Repair of HP Step Attenuators
Measure the coil resistance and drive voltage.? It may be that the drive is weak and it's not getting enough coil current, either due to coil resistance increase or drive signal decrease. Bob
By Bob Albert <bob91343@...> · #48499 ·
Re: New Spectrum Analyzer Discussion
I think maybe you misunderstood my posting. Or I didn't write it well. I mentioned I have an HP and an avcom but they are not what I am discussing in my posting. The spectrum analyzer I am talking
By ken fest · #48498 ·
3457a on the way
So I have a 3457a on the way that passes the self tests. What are the odds of it actually working when I get it? What should I look for as a general failure for these devices? I always assume
By Jeff Machesky · #48497 ·
Re: New Spectrum Analyzer Discussion
The prices I see at: http://www.tscm.com/avcom1.html make this an expensive spectrum analyer. You were lucky to get one for $250, if the basic price is $3375 I think I'd rather keep my HP 70000
By David Kirkby <david.kirkby@...> · #48496 ·