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What mixer? The SA is fine..

Does the attached pdf help-I have more if it does Regards Mike g4wam Sent: 01 March 2023 17:02 To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] HP transistor

Don, I am looking for more info on the HP Germanium transistors: 1850-, 1851-, 1852- prefixes Do you have any further info? lists, data sheets, specifications,? about these ? thanks,

mixer damage due to overloading?

No chance it's the one in the 2784? -- john, KE5FX Sent: Tuesday, February 28, 2023 12:59 AM To: [email protected] Subject: Re: [HP-Agilent-Keysight-equipment] HP 8753D Opt. 006

After checking all voltages once again and connected the spectrum analyzer to the YIG output directly - the delivered YTO is definitly bad. Alltest will replace it. That's the good news. Alex

A few years ago I retrofitted the tracking generator option to my 8595E analyzer. I’m pretty sure the LO distribution amplifier (LODA) had a bias value written on the top label. There is a trim pot

I have a VXI frame with an E1430A 10msps ADC. I managed to get an older 32 bit version running on a windows 7 box (not my first choice but attempted path of least resistance to start with) but think I

Thanks to all, I will investigate!

I had problems with a H75 option and I found a bad contact . I recommend to disassemble the unit carefully. Ing. Patricio A. Greco Taller Aeronáutico de Reparación 1B-349 Organización de

Hi Greg, Your recommendation of looking at first mixer output is still valid. Rik's SA is off by 30-40dB, few dB error in expected levels won't change debug approach. Block diagrams take some time to

Hi thank you for the return Emails I will do a frequency sweep but we are talking down by several Dbm at 100 Mhz I am 99.9 % convinced it is a problem with the series cap Regards Paul Sent: 27

How much goes down ? Did you sweep the sensor ? The input reflection coefficient is good tho check it. Ing. Patricio A. Greco Taller Aeronáutico de Reparación 1B-349 Organización de Mantenimiento

Excellent idea - should be one of the first things down. Cheers! Bruce Quoting Rik Rasmussen <rikrasmussen@...>:

Today, I paused troubleshooting and recorded for backup, the Correction Constant Data using the forms in the service manual.

Good luck bug hunting ! Cheeras! Bruce Quoting "Greg Muir via groups.io" <big_sky_explorer@...>:

Ozan, Boy, did I make a big fluff!! Your recent comment regarding the erroneous IF frequency in my last post brought me to take another look at the stage gains/levels that I had mentioned in that

Low end roll could be connector or bellows cap, guessing the later, but remote diagnostic is asking for trouble. Willing to help

Hi I have a HP 478A Thermistor head that works OK above 2 Ghz but reads low below 2 Ghz I assume there is a problem with the internal series capacitor Has anyone had a similar fault and is there any

alex@... writes: You can check