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Thanks, Dave! I will try the largest value cap I have in parallel with C821 this evening. The rest of the day is dedicated to my other addiction (I meant strikethrough) hobby, playing musical

I posted this in the hpagilent group a while back, but no one seems to have info. That group seems pretty quiet lately, and I don't see indications that it's moved to groups.io yet. Since it's mostly

If either of the rectifiers were shorted, you would see the waveform go negative across C821. The minimum value of 2v indicates they are OK. This is OK. This

Thanks, Harvey. So I checked out the 8 V supply feeding the 5 V supply - it looks really bad! Similar waveform to the 5 V rail but dips from a high of maybe 14 V down to about 2 V. That's at the

Hi George, Glad it worked for you too! I guess you may have figured this out as well but when it comes to re-engaging the slots in the SMA connector with the stripline I found the springy stripline

Yes, both of my 7A29s are like that. On one of them a couple of cams had rotated so the attenuator settings no longer made sense. I added a fillet of epoxy at each side of each cam (I used Loctite

Adrian, I was able to restore one and now two of my 7A29 units following your procedure! It is definitely a ground contact issue between the resistors and aluminum block. One more to go. It is indeed

Not sure it will work, but I'm attaching a scan of the 465 manual pages describing the option. It's basic SMPS EMI filtering plus a mesh screen on the face of the CRT. I'm guessing the mesh screen was

My 585 manual says “with 485 EMI mod option 4 meets mil 1-618D req: power line conducted, 150khz -25mhz; radiated , 150khz-GHz [sic]. Don’t know what the mod is though. If someone knows, please

Ah, the HP 54503A must be similar to the 400 MHz 54504A DSO that we have unused in the storage area at work. Came from a power supply vendor who went out of business, but we have more modern Tek

The 2440 can be a real craps shoot. I had one on the shelf for many years that was failing self tests so bad that it would never boot to even crippled functionality. One of the failures, as I recall,

I just got a 19.5 volt 45 watt HP supply today. The connector is a large 3 contact coaxial, Positive Center pin, Negative Outside Sleve and Voltage control on the Inside Sleeve. Voltage measured 13.4

The outer diameter. I've seen 6, 9 and 12 volt adaptors where the plugs will not go into something with the "wrong" voltage requirement. The older ones seem to standardize on one thing and it's up to

You mean the outer diameter ? It seems the pin is more based on the current. this laptop, I can plug its adapter into a smaller and older laptop, but the for it will not plug into this one because of

Speaking of the 7104 I have a very nice R7103 ( rack mount 3 slot version of 7104) that as Harvey says I no longer wonder why I need it .....I dont!! _*Make an offer*_ , pick up ONLY in Tampa FL area.

I have a 7104. I use it only when I need the MCP or the 1 GHZ bandwidth. That requires either a direct coax input or a 1 GHz probe (and, for that matter, something where the bandwidth is needed).

The 1982 catalog lists Option 04 for the 485 indeed as EMC option -DC manuals@... -- Dave Manuals@... www.ArtekManuals.com

The 2400 series digital are pretty cool. What I’ve dealt with over the years of repairing them is yes the NVRAM batteries can be failed which adds up to replacement recalibrate. . But rebuilding the

I just got a nicely refurbished 485 which lists "opt4" under the SN. I could find no information despite several searches. I was surprised at how little information there was at the w140.com/Tekwiki.

I'd say that could be likely.? I bought a 2440 at a flea market for more, and it was stone dead when I got it home.? With the help of people on this list, I got it running.? The archives should