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Hi. Anyone have any hard won experience as to how best to tackle the removal of the cooling fan from a HP8620C sweeper mainframe? The fan in mine, is running slow (so the instrument, and especially

I’m not a fan. His assured spew of misinformation rubs me the wrong way. Dave Wise Sent: Thursday, October 28, 2021 9:06 AM To: [email protected] Subject: Re:

Wow, talk about over-complicating things... You don't need a scope to do this test. Just a wire plugged into any handy audio amplifier will do. One way will get you more hum out of the speaker

<https://www.eevblog.com/forum/testgear/ni-gpib-usb-hs-265350/>

Alwyn I use my 6271B all the time with My GRC 106 Military transceiver. Puts out maybe 350 W with two 350Z tubes. But the GRC is so loud (fan) that I would not notice any PS noise. Wally

Please can you describe how you rewrote the memory chip and where did you find the code and routine to perform it.

Dear Wally, I have the 60V version, 6274B. Under J3E syllabic loading the noises from the mains transformer were loud and a little worrying, so I decided not to use it for transmitter

You have to pry it open with a metal spudger. Good luck with it ... I'd be very interested to know what the problem is. I managed to fix a GPIB-USB-HS (the older version) by re-writing its memory

Would have to ship to Miami FL. I know these can be a bear to pack and ship. Thank you.

Hello All, I have a National Instruments GPIB-USB-HS+ adapter that appears to be dead.? It does not respond at all when plugged into a USB port.?? What I need to know is how to open it up.? I

There you go, just another -very- good reason to stay with a good old linear PS. I have enough birdies already just dealing with the Ethernet cables and routers, don't need any more :-)

Hello Dave, yes shure I'm searching the Circuit sheet plan. I found out that the Resistors (22Ohm) positions 14,15 are interrupted also the Transistor (2SC3866) position 50 is short and the Z-Diode

X-rays don't happen at such low voltages. The blue glow, if on the envelope, is fluorescence caused by electron bombardment. If you get a glow that is inter-electrode, it is ionized gas. -Chuck

?? Some tubes like the ones you mentioned, have a deep blue glow on the inside of the envelope due to x-ray bombardment. This is different than a gas glow, which is inside the tube, usually between

This might have been the video which was relevant to capacitor discussion in this thread: Are Your Capacitors Installed Backwards? Build this and find

+1 to Mr C. I get a lot of value from his streams for just $2 a month to Patreon. --Toby >

Thanks, Glen. I've missed the last few days due to exceeding my email storage limit at my ISP. Friends sending me too many 10-15 MB videos! Jim

Hello All, I have for sale an Agilent E4418B power meter.? It has a good display and comes with bumpers and handle.? It does not include the sensor or sensor cable.? It works well but I am selling

The outside foil of condensers is usually connected to ground for shielding. If this is ignored in the IF section of some receivers, oscillations and instability can be a problem. In a scope or audio

Mr Carlson's Lab https://www.youtube.com/c/MrCarlsonsLab/videos