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Well, I was hoping to get something quickly to do some experiments with the PS5004 power supply plug-ins I just bought recently. Rather painful to adjust a 20 V supply in 500 uV increments! But you

George, Where is it on the spec sheet that is says 350 V NOT 500V? https://www.mouser.com/ProductDetail/TE-Connectivity-Holsworthy/H4P430KFZA?qs=8G8kQhBkhGi7czvkMo%2FnhA%3D%3D,

If you can wait a month or so, I may be able to hand-deliver it to you on my way to visit family in San Diego. Tom Sent from an iThing; please forgive the typos and brevity

Thanks, Renee. LMK. Shipping should be reasonable down here to So Cal. Jim

Maybe. I don’t find any PCs in ewaste at work, probably because of proprietary information on the hdds. I will ask around. Thanks. Jim

Jim- let me check as I have a tower doing nothing...hss not been used for long time, will know when I get to the shop over the weekend. shop is? in no. SF bay area Renée

Jim, Do you have anyone in your environment with a not too old laptop? Get it for a box of cigars, install an SSD and Linux Mint. You're back in business! Best 73 de Harke

My garage lab computer went kaput recently, and I need to get another one to control my instruments via GPIB and USB. I had a tower running Windows 7, although it was originally my wife’s computer

Hi NO NO NO Standard 1W resistors only have a working voltage of 350V and some of rare ones of 500V, use resistors from the Vishay VR range or equivalent. R4434 must be suspected. G Edmonds On

James, The focus problem may be due to resistors in and around the focus circuit. They should be raised to 1W types due to the voltage drop across them. These resistors are from B+ to the collectors

I have also with success replaced DS1230 Dallas chips in HP scopes with FM18W08 and a SOIC to 28DIP board from CPC Farnel + IC socket = 5$/GBP and works well.

Last night I swapped the entire supply over and the problem remains. Surely the chances of two PSU's having identical and 'uncommon' faults, rules out that possibility. Considering that we have

2430A I had last week had no display, a 2.7Uf tant cap was loading a reg circuit (top PCB rear left) -- Jeffeelcr

Due to a mistake on a drawing Tektronix had 012-0482-00/01 cables made with RG-58/U cable. They have now corrected the error and have the correct RG223/U cable and have 012-0482-01 made with the

On Wed, Feb 26, 2025 at 12:43 PM, Barry Breaux wrote: I changed DC502 to SC503. > > Hello, > > I posted a picture in photo of a waveform being drawn by an SC503. I asked if > anyone wanted to guess

Makes sense. They added the optocoupler later, it looks like. It doesn't look like the 492 used the line trigger for power-good reset, at least at first glance, so it sounds like the disconnected

Hi all, I'm having an issue today with 'View/Reply online' (I'm not able to find the window to enter a message) and that's the reason for using 'Reply to group'.If Edward's 'Please explain more'

The PSU hasn't been fully recapped although it the ESR was checked

Hi Menahem. Before, it wouldn't turn on. The two 0.068?F's had exploded. James.

And before the RIFA's were replaced, what was its condition? Menahem