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No prob, though I don't really hold out any hope of a reply, i've since seen several posts on other forums all of which say people have emailed him with questions about his Youtube videos and asked

Begin Nostalgia... { The specific analyzer was used by myself when I was employed at the company that had purchased it some time around 1982. 40 years later it appeared at an auction for

Usually the transformer is active to power an oven oscillator. I have also seen equipment with the power switch mounted in the back and a long shaft connecting it to the front. ed

Magnétostriction noise is at harmonics of the mains , eg 100, 150,200....Hz in UK, EU. It is nonlinear with mains voltage, increasing rapidly at high mains. What's your mains voltage? Jon

Is still available?

Are you sure that it is the main transformer? There are two additional smaller transformers in a black case on the board. Ralf

Hi Anders, when repairing TV sets in the 80ties or? 90ties we used a kind of a thick paint spray especially for noisy coils. You can try to tighten the sheet metal package and use a transparent

More details on that replacement are at https://www.eevblog.com/forum/testgear/hp-agilent-53131a-53132a-vfd-to-led-conversion/msg5760247/#msg5760247 I've bought one and it looks well made, but I

Thanks for answering. The 54540 should have been produced from 1993 to 1998 but is not present in the 1993 catalog and 1994, 95 and 96 catalog are not present in the hparchive. The only 1997 catalog

You could use the differential probes like 1168B InfiniiMax II and alike (there are many to choose from). The problem of measuring the Gbps/GHz digital signals is that the distortion of the probe on

True. It is rarely used so I guess I can power it up beforehand in those case. I will try retightening though. I guess a replacement transformer can be difficult to obtain.

Take a look at this replacement LED display: https://www.ebay.com/itm/326404635023 ( https://www.ebay.com/itm/326404635023 )

I noticed that 3435A and 3466A DVMs, plus the 5316A counter, and presumably other models, are set up such that AC power is *always* applied to the transformer - the power switch only controls DC

Tom - Yes, floppies. The unit is picky about the format. I found the best way is to use the SA itself to format the discs. It also seems picky about the RAM used. See attached. As I recall, you might

The 2 interconnect cables 85662-60093, 85662-60094 (85662-60220, has a SMA- f connector for the 85685A) are interchangeable between the 8566A/B, 8568A/B models. Don Bitters

I have one that I got for $20 years ago at a HAMfest, not working. The fan bearings were bad - it would barely turn. Replaced the fan. One of the 15V rails was dead (I forget which one). I replaced it

Per the HP Memory project the 54540A o’scope was introduced in 1994. I would check that year catalog for the intro price. Could not find that year catalog there. Also checked the hparchive.com site

Seems reasonable process.? Caution - be sure to check that the time gate control (a variable resistor with a switch) switch section is functioning properly.? The symptom that I've seen is? that the

Thank you. "You just saved me a lot of investigative time" [paraphrased, or maybe quoted, from Firesign Theatre]. DaveD KC0WJN [email protected]> wrote:

Thank you all.?? Another member sent me the key.? I would also need to update the firmware (9 floppies, is there an easier way????) and add some ram. Tom