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Date
Re: HP8640B part 08640-60043
Thanks Tom. Yes, silly me. That should have been obvious, especially as I also bought the hybrid with it! Cheers, Renaud
By Renaud F5ZR · #144887 ·
Re: 410B Information wanted
To answer my own question, the data sheet for the EA53 shows it to have an indirectly heated cathode. In general, tubes with indirectly heated cathodes want to be operated at very close to the
By Richard Knoppow · #144886 ·
410B Information wanted
I posted recently about my ancient 410B, which I finally repaired. I have a question: My meter was modified for the Amperex EA53 RF rectifier. In the handbook it states that the filament voltage for
By Richard Knoppow · #144885 ·
Re: HP 8566B PL2 unlock error
After replacing the stepped attenuator, a separate but annoying fault, the PL2 unlock problem has disappeared. The unit now functions as it should and passes self calibration.? Go figure... Thank you
By Jack · #144884 ·
Re: 16801A Logic Analyzer Repair
I have had to change the motherboard and that has fixed the immediate problem, but now I get a frame id error. I am going to check to see if there is a registry key but does anyone know what it should
By richard@... · #144883 ·
Re: HP8640B part 08640-60043
Hi Renaud, That¡¯s the RF output board. The PA hybrid plugs into it at the top. Cheers Tom Sent from an iThing; please forgive the typos and brevity
By Tom Lee · #144882 ·
HP8640B part 08640-60043
Hi, I just bought this spare part for my 8640B: 08640-67043 also E-1716-4 I didn't need it but it was quite cheap so I took it. I only found one reference for it in HP 8640 ARMY_parts 40 pg(1).pdf
By Renaud F5ZR · #144881 ·
Re: HP 3852a extended memory modules info
All good feedback from everyone. thank you.
By Maciej Kawalkowski · #144880 ·
Re: Looking for internal photos of 04284-65007 'Interface Box'
We just use the std 4x BNC to test lead adapter. No need for special fixtures at the DC and test freq. Jon
By Froggie the Gremlin · #144879 ·
Re: Looking for internal photos of 04284-65007 'Interface Box'
On Sat, Jun 15, 2024 at 10:33 PM, Dr. David Kirkby, Kirkby Microwave Ltd wrote: > > On Sat, 15 Jun 2024 at 08:20, Jared Cabot via groups.io ( http://groups.io > ) <jaredcabot= [email protected]
By Jared Cabot · #144878 ·
Re: Looking for internal photos of 04284-65007 'Interface Box'
[email protected]> wrote: I can't recall seeing that on the cal certificate of a 4284A which I had calibrated by Keysight. Not 100% sure. I managed to get a free option 006 (support for 4 m
By Dr. David Kirkby, Kirkby Microwave Ltd · #144877 ·
Re: HP 70004A with Video DRAM error
I recently encountered an ¡°A5 graphics DRAM error¡± on my 70004 display and while web searching came across this thread. Initially my inclination was to try replacing the 16 VDRAMs on the A5
By Gary Lauterbach, K6MG · #144876 ·
Re: Several problems with Agilent 54810
Re, Can you confirm if the din interface of the Atlas 757 PCi3 board (in the Agilent 54810A) is in XT or AT format. I made myself a ps2/ Din adapter, but no communication, except the reset of the 3
By Gerard · #144875 ·
Re: Looking for internal photos of 04284-65007 'Interface Box'
After taking a look at the 4284A Operation Manual, I derived the internal wiring layout for the 04284-65007 Interface Box. I uploaded a diagram as per the link below:
By Jared Cabot · #144874 ·
Re: Flea Market HP 410C
Great read, Gianni!
By jerry-KF6VB · #144873 ·
Several problems with Agilent 54810
Hello, I am asking you to move forward on several issues. First this oscilloscope did not start at all. I found the failure by dismounting the main acquisition board which had a capacitor on the
By Gerard · #144872 ·
Re: HP 8970B with 346B Noise source - Error 13
Apart from suspecting the 5dB pad in the 8970B... I will hint at a solution to this problem may be the supply voltages out of tolerance. Check all DC voltage levels on the various boards and modules.
By Ulf Kylenfall · #144871 ·
Re: HP 8970B with 346B Noise source - Error 13
It works on the 8970A and reports +4dB after calibration. It doesn't work on 8970B. Do you have a 8970A and 346B to check the uncorrected value reported?
By Razvan Popescu · #144870 ·
Re: HP 8970B with 346B Noise source - Error 13
Am 14.06.2024 um 10:59 schrieb DF6NA Rainer: SRI it's the 346A?? ! ! !
By DF6NA Rainer · #144869 ·
Re: HP 8970B with 346B Noise source - Error 13
E 13 =>? ENR must be 11dB minimum at 30MHz - the HP346b has 5dB ! ! ! Am 14.06.2024 um 10:49 schrieb Razvan Popescu via groups.io:
By DF6NA Rainer · #144868 ·