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Thank you Mark. I can actually source these locally. Looking at the board, the pin layout isn't as obvious as I thought and I haven't been able to find any kind of schematic for the 492 PSU so

I tried simply using two VOMs. The presence of the HV probe does not change the read value at U1540 pin 4 even one millivolt. So there are two possibilities: the HV probe does not say the truth or the

James, A BUV48A will work and is heavier capacity. Mouser has these in stock for $6,76. Mark

An NPN is an NPN is an NPN, no? Therefore, it must be possible to use a more common package of transistor and bodge a solution to this unobtainium nonsense? Ok, we don't know the Gain, but we do

Hi all. Can't seem to find these anywhere. According to Sphere, these are, 'HARD to find 49xP Series Inverter Transistors! - 2N6587, TO-61, NPN, 10A/450V' - (SOLD OUT) Is these a

Greetings, all. It occurs to me that maybe this is a simpe loading problem. The HV probe is likely to have a resistnace of the order of 100M. With 1600V, the current is 16uA — not

THANKS!

It is still important that an 11300 non-A with F/W 3.1 is treated as an A-scope in CATS. http://www.hakanh.com/dl/docs/hardtofind/11k_CATS_2.19.pdf /H?kan

Sorry, my fault. It works. I was running in the wrong directory.

Thank you Hakan, I tried but its still says “LOG ERROR-> CAN’T FIND EIS RCS VERSION NUMBER” Actually this is not set and the EIS RCS control variable says NOT SET. Is there a way to set it?

Select 11302A and ignore the error message and it will work. /H?kan

Hi, it's me again... :) I was going to go on with the 11302 checking and tried to connect to TekCATS 2.19, but in the meantime I had updated the firmware to the 3.1 version and TekCATS refuses to

The capacitors are fine... I did change the ones on the PSU board, but left the large cans be. However, there was an open diode in the bridge rectifier circuit which was the cause of the ripple on

Hi all, So last year my venerable old 2465A developed a weird intermittent fault. After some time - arbitrary and not temperature related - this fault would arise whereby the screen would become

Hi Friends, as planned, I went today to Andrea and checked his beautiful 11302A, using the same VOM and HV probe. Well: all its values are exactly like mine. Only the ripple seems to be a little

Hi all I have dialed in the voltages, which brought back most of the logic that generates the patterns, but there is still something wrong with the heater circuit. It generates a picture now, though

You may do better in the [HP-Agilent-Keysight-equipment] group

Hello John, wow - thank you for the quick reply! I'll try it out later and report back! It's really strange that there isn't much information about this online... Best regards, Eric

Hi Martin, Thank you for your tip. OMG – I thought I just shared the picture of the probe. Just deleted the link - it shoudnt work any more. Best regards, Eric

Hi. I have a HP54502A in fairly good condition I want to fix for my workbench. It fails on A/D test (pass D/A and rest) on CHANNEL 2 only. I have no schematics, just the SM, and if anyone knows of