I use a 1 Ma meter in series with a 47,000Ω current limiting resistor for reforming HV caps, up to 600 rated volts. I never let the cap charge current exceed 1 ma and typically try to keep the

Also, I forgot to mention that I changed the 4.7/10 tantalum cap to an electrolytic of the same value with a bit higher voltage It’s the only one I found in the power supply. I figured why not since

Again Mr Harris, I sincerely appreciate all your help with this scope and getting it fixed for a longer life. I have cleaned as much (and it wasn’t horrible) of the dust as I could with a soft

I’ve actually stopped the process and made another order with mouser and bought the proper electrolytic and safety caps. They should be in some time this week. I did change the 4 47uf caps on the A5

Tony, FYI, there is a Sencore owners group on the web: https://groups.io/g/SencoreOwnersGroup Greg

Just a quick addendum, this cord has a different color code than shown in the 321A manual. but yes, it does fit and work. please note that the manual shows a picture of the AC power connector (with

Yes , I did , but no reply yet! 從我的iPhone傳送

Well it turns out I had a Tech issue and not a Tek issue. I have a variac and current limit supply on the bench that is adjustable. 6 X 60W light bulbs that are switchable. I had 4 of them switched in

Hi Dan ,as a result of your last message I have looked elsewhere for a user manual for the DAS , bitsavers were a good choice . The copy I had was incomplete , section 12 was only about 25% complete

My 465 had the same problem, no sweep, found that tantalum capacitor C1220 on horizontal amplifier was shorted out. Cap C1220 is connected to the -8V supply through resistor R1220. I replaced it with

Hi Steve, UPW's are not my favorite for the switcher side of the supply, but they should be ok. I find the UPW's are not beefy enough for my taste. I use UCC's EKZN500ELL331MK16S (mouser) 330uf

2 questions quick, the low esr lhigh ripple Nichicon UPW caps I have aren’t dimensionally correct but work well for the spots their in, is that ok? I have none of the safety caps that are the same

Thank you for the reply. The logic probe that I have must be disturbing U2435, as it causes it to reset on both the repair scope and a good 2465 scope. I will locate another logic probe. Meantime,

Hi Dennis, Apology taken and I apologize for not leaving it there but instead opening my big mouth. After a long career in electronics I feel that I have earned my bragging rights, but as Chuck

I would get it done. Once it is done, you don't have to worry about it anymore. -Chuck Harris Steve wrote:

So should I continue capping or hold where I’m at and put it back together? -- Kind Regards, steve

my 422 AC/DC (early) manual has 161-0016-00 for the 3 wire DC cord, 161-0015-00 for the 3 wire AC cord. different pattern for each. I am in need of the DC cord..the AC cord is a bit ratty but

Can you send us a photo?

Hi John, Thank you for finding that fascinating video. Ted Yapo is onto something really interesting. I think within a year he will be able to at least match the risetime capabilities of the Tek S-4

Here's the link to the slides and other info also as I didn't noticed referenced: https://hackaday.io/project/167292-8-ghz-sampling-oscilloscope