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Re: 2247A PSU Troubleshooting
Nick, I replaced more than that on my 2246A supply. For the pain to remove the power supply, I thought it would be worth it. I may had others that were leaky, I don't recall. I still have the old ones
By [email protected] · #155503 ·
Re: 2230 display distortion in the first quadrant
You have a damaged CRT.? Most likely from being dropped. Regards
By Tom Miller · #155502 ·
Re: Tek 547, 545a, and R561B for sale near me
01950 [email protected]> wrote:
By David Berlind · #155501 ·
Re: Tek 547, 545a, and R561B for sale near me
Where are you? (zip code?) ? Dan
By Daniel Koller · #155500 ·
Tek 547, 545a, and R561B for sale near me
Hey all.. spotted these 3 beauts for sale near me. Don't know the seller. But it's very close to me. Asking price for all 3 is $125. There's an extra 3A74 plug in that goes with the bunch. I have
By David Berlind · #155499 ·
Re: 2230 display distortion in the first quadrant
Hello Peter, it looks like a magentization of the right upper corner of the magnetic shield. You should de-gauss it. Best regards Joerg peterp@... schrieb:
By J?rg Kirchhof · #155498 ·
Re: 2230 display distortion in the first quadrant
Sorry to give you bad news but the tube is damaged. Not much you can do except buy a donor scope for a tube (Your 2215A uses the same tube) JC
By chipbee40 · #155497 ·
Re: 2247A PSU Troubleshooting
I removed 8 diodes marked ZS last night and will order replacements today. Will report back with results. Thanks again for all the help so far Nick
By Nicholas Keller · #155496 ·
11801 extender card
I want to investigate the possibility of replacing the 1.4 ps jitter clock with a modern device with sub ps jitter. As there is no component level documentation that I know of, doing this will require
By Reginald Beardsley · #155495 ·
2230 display distortion in the first quadrant
Hello all, I just got a 2230 scope from the (in)famous website to help me with some vacuum tube ham radio equipment and it came with a fault. Here are some pictures and a short movie that show the
By Peter - KC2ZFA/SV0BU · #155494 ·
Re: Switch won't latch - 7CT1N
==================================================== Yes, I was thinking of the 576 when saying that. Rolynn
By ROLYNN PRECHTL K7DFW · #155493 ·
Re: Switch won't latch - 7CT1N
Rolynn I'm sure you mean well, but there are no switches on any 7CT1N that are immediately behind the front panel. The shaft in question is six inches long, as I already stated. It is already obvious
By EJP · #155492 ·
Re: 2213A Novice, unsolved anomaly encountered, documented & video
Hi Gary, It might be helpful to drive an input from the 'probe adjust' output to be able to observe the state of the vertical when the horizontal collapses. Just a solid wire from probe adjust to the
By Brian Cockburn · #155491 ·
Re: 91% Isopropyl Rubbing Alcohol to clean potentiometers?
This topic has a dangerous habit of feeding on itself with information that has only tangential relevance to the subject of TekScopes. I understand that we have more than a few members with chemistry
By Dennis Tillman W7pF · #155490 ·
Re: 2213A Novice, unsolved anomaly encountered, documented & video
I hope the 2213A owner follows JC's test plan, or some variation of it. The 2213A needs a good logical plan to find this most unusual failure. It's great to hear that David Hess has been helping him
By tom jobe <tomjobe@...> · #155489 ·
Re: 2213A Novice, unsolved anomaly encountered, documented & video
My first scope was a 2213A. I got it from the auction site. Stated all was working 100%. After powering on for several minutes it would lose its trace and go crazy. The previous owner had removed the
By Brendan · #155488 ·
Re: 2213A Novice, unsolved anomaly encountered, documented & video
Looking at your Youtube, something is obviously failing with heat so freeze spray would be helpful (upturned canned air is fine). My initial thought was U760 as the timebase is collapsing but I've not
By chipbee40 · #155487 ·
Re: 2213A Novice, unsolved anomaly encountered, documented & video
Nope, no break for Dave Hess; He's on TekScopes, too!Jim Ford?Sent from my Verizon, Samsung Galaxy smartphone
By Jim Ford · #155486 ·
2213A Novice, unsolved anomaly encountered, documented & video
Hello fellas! I have been reading/researching a ton over the past couple months while trying to get my new to me 2213A in proper working order. I bought one from the auction site and powered it on for
By guy232 · #155485 ·
Re: 91% Isopropyl Rubbing Alcohol to clean potentiometers?
From my table of polarity of solvents, isopropanol, and indeed ethanol and methanol, are all much more polar than acetone. If it is water soluble, it is most likely polar. If it is insoluble in water,
By Chuck Harris <cfharris@...> · #155484 ·