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Check harmonica connectors from panel to other boards possible to reseat. Jon

Recently my Tek 2236 began giving a "Control Button Error" message, occasionally at first and now more regularly. Exercising the buttons does not seem to clear this. I ran the CTM diagnostic and

Hello, The truth is that I took a while to post because I didn’t have the money to buy the spare parts. I had to work extra hours for two months to afford them. I'm sorry.

In fact Mark, I actually have here a HV board with a blown transformer so I can grab the resistors from that . If for nothing else other than to see what happens? Thanks again

Thank you Mark. I'll look into that and let you know how it goes.. James

Hello I have a 2712 that i picked up “parts only” on eBay. I replaced the two button cells and it works well aside from failing two Amplitude Normalizations. BW Filter Ampltd (Lin) FAIL Preamp &

James, Likely the resistors to the C and B of Q145, Q152 and Q269 collector only are bad. The originals are stressed. Use 1W types. These are the same problem in the 24x5/7 series. Even if they test

But this scope has a display (now). Just ridiculously blurry

Looks like he needs a PCI slot for gpib card. Would have to go to USB to GPIB if he went w a laptop.

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.