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Date
Re: HP8591A
Thanks Yves, I will put in a new battery and see how it goes. I am thinking of a rechargeable Li-Ion mounted on the rear panel with the wiring going to the board, Regards Brad
By Brad Latta · #140592 ·
HP 8640B Attenuator Repair
For those interested, I have had great results repairing this 8640B output attenuator.? Symptoms were non linear attenuation, and signal drop out on some levels. Drop out could be restored by
By Don Brown, N3DEB · #140591 ·
Re: Help figuring out my 8648C Signal Generator?....
Hi Jared, You will need to do a little choose-your-own-adventure hunt through the manual. Your device is 3426A. The manual on keysight's site is for 4037A/U and doesn't contain errata or a back dating
By Tom Haynes · #140590 ·
File /5086-7676__8753 EYO.pdf uploaded #file-notice
The following files and folders have been uploaded to the Files area of the [email protected] group. * /5086-7676__8753 EYO.pdf (
By Group Notification <noreply@...> · #140589 ·
Re: HP 8920B
Mark, it was the Thermistor and I did replace the 470k resistor also and swapped all RIFA and electrolytic out. Was still having issues and found the on / off switch wasn¡¯t making good contact too I
By KB2LMN · #140588 ·
Re: Help figuring out my 8648C Signal Generator?....
Hmm. 240VAC mains? I'm aware of this problem but never experienced it. (Thank the magic smoke gods!) When I would check, they all used the sealed EMI filter modules. Fingers crossed! A lot of the HP
By Mark Bielman · #140587 ·
Re: Help figuring out my 8648C Signal Generator?....
Mmmmm, love that Rifa smell. NOT. ;) -Dave -- Dave McGuire, AK4HZ New Kensington, PA
By Dave McGuire · #140586 ·
Re: Help figuring out my 8648C Signal Generator?....
I'll have to wait until I reassemble the instrument to try... I'm currently dealing with a fresh-popped Rifa capacitor (the first Rifa that popped on my bench! So exciting, and stinky... :D ) and a
By Jared Cabot · #140585 ·
Re: HP 8920B
Hi Drew, I'm curious about the PS fix. Was it the 470k "start up" resistor? I've fixed a couple of these by replacing that. (they were open) Mark ________________________________ Sent: Wednesday,
By Mark Bielman · #140584 ·
HP 8920B
I picked up a non functioning HP 8920B and I¡¯ve been hard at it. It had a no power on issue that I resolved by repairing the power supply, NOT FUN! Next is installing a new LED monitor that I
By KB2LMN · #140583 ·
Re: Sony Model CHM-7501-00
Thanks for the info. I have a 8510c and a 70004 that can use new graphics Mike [email protected]> wrote:
By Michael Perkins · #140582 ·
Re: Sony Model CHM-7501-00
http://simmconnlabscom.ipage.com/store/page2.html have LCD replacements. Find your instrument for the model to order. I highly recommend it, and so do many others.
By peter bunge · #140581 ·
Re: Sony Model CHM-7501-00
Does anyone know of a lcd replacement for this monitor? Mike
By Michael Perkins · #140580 ·
Good afternoon
I have scoured high and low for this and thought I would ask here as well. I have a 4395A that is barely out of tolerance on attenuation. Repeat tests confirms the failure and it is adjustment is the
By VeeCal · #140579 ·
Re: Sony Model CHM-7501-00
Hi, I have one of these in a HP 4155A Semiconductor Parameter Analyser The information I have is the following: Sony Model No. CHM-7501-00 HP P/N 2090-0210? 1996.15 65V DC 0.5A This 2090-0210 tube is
By SwAkE · #140578 ·
Re: Sony Model CHM-7501-00
ThanksCaesar, I found some notes where you helped me set up the colour on it in an 8757D. I replaced it with an LCD. I guess I will give it to the guy who bought my 8757D. It was a nice machine. Peter
By peter bunge · #140577 ·
Re: Help figuring out my 8648C Signal Generator?....
I only have a guess, but the one output-related option I'm aware of is for higher power (20dBm, if memory serves). Perhaps that's what "MOD AY" is. Try setting the output power to around that value
By Tom Lee · #140576 ·
Re: Sony Model CHM-7501-00
I think the first products were the 8757C/E since I was the support engineer at the time.? Even though the E model was monochrome, it still used the color display...just using the green gun.? It
By Caesar Valenti · #140575 ·
Sony Model CHM-7501-00
Can anyone tell me what instrument a?Sony Model CHM-7501-00 video monitor came from? I found one in my storage. It might have been from a colour LCD upgrade but the only thing I can think of is an
By peter bunge · #140574 ·
Re: HP8753ES and speed
Scott, can you suggest something "If speed is really an issue, you may need to upgrade to a newer instrument that will be orders of magnitude faster than the 8753.??There are really quick
By peter bunge · #140573 ·