Hello Chuck, I don't get the 02 Test Fail 53 at startup. If I go into the testing it sometimes fails other times it doesn't, if I leave it looping it never shows a failure. As I said the caps

Yes, buying a Tek cart locally is best. But shipping by Trailways or Greyhound is an option - no packaging was required, just a tag, and they handled them well. Inquire if there is a Trailways or

The Delta t switch is read by the CPU. If the CPU says it is stuck, it is stuck. Check out the path from the switch to the CPU. There is a twisty turney path through some opamps, and MUXes that

Hello TekScopes, Posted about this a while ago, but while some work has been done, nothing has improved this problem. If you'd like to see a video..... https://youtu.be/nyFnwWyP6XU Shows

If anyone knows Donald Rea can they contact me off list at dennis at ridesoft dot com. I have an incorrect address for him in Mt Angel OR and I would like to correct it. Thank you, Dennis Tillman

For Tesla coils to nuts there is the EEVblog Forum. If you enjoy separating the wheat from the chaff that's the place to go for lots of chaff. For LeCroy, Phillips, Fluke, HP, Rigol, et. al. there are

Perhaps. But given a fixed signal level, a rising noise level, lowers the signal to noise ratio, and may prevent the successful transmission of information. Almost 1/5 the posts on TekScopes mention

"Would the module throw an error message if its Dallas-chip-battery is gone? " The 11A34 extended service manual indicates that if the U801 "dallas" chip battery is failing, the plugin will generate

Ram, I would love to get one of your U800 modules when you release the final version. I would be happy to independently evaluate it and post the results here. Thanks, Victor

Hi Raymond , I have several 7A19's and so far not blown one of the input fuses , I hope I dont ever as I gather that they are rather hard to find , fortunately all the 7A19's I have purchased have had

Hi Brian, I have had several TDS 4xx and 5xx 'scopes and never experienced this behavior. I'm *that* careful - or lucky... Nowadays, my only 'scope in that range is a TDS3054 (actually, a modified

Hi Raymond , I have a couple of TDS's , a 744 original version and a 420A . Both are protected on the 50R input setting so I would expect all others to be the same . I have noticed this behaviour when

I use my 11801 a *lot*, particularly with an SD-24 for testing RF connectors and cables. I missed a chance at an 11801C, but am continuing to look for one. Reg

These were my thoughts exactly. I wanted to add that the 50 Ohm input may be protected but for a fast 'scope, the circuits would be tiny, so difficult to fully protect. Unfortunately, I couldn't find

mine are in early Tek 422 inputs 8056 and  one 8393 vert amp total of 3 Renée

I have a Tek mobile scope cart model 3 in my storage unit.  It's in fairly nice condition, needs to be wiped down to remove accumulate dust and dirt.  After paying for 2 years of storage on the the

No, but early production (ca. 1965) of the Keithley 147 and 148 Nanovoltmeters used a couple of Raytheon CK512AX in the front end. At the time, they were quieter than semiconductors. I have a 453,

The mention of Nuvistors in the 1A1 reminded me. I had a 1A1 that had a bad channel. I got at a hamfest and did not look carefully at it before plugging it in the scope (a 547) and one channel was

Oops, typo, that should be 454 of course

Nuvistor is a twist on New Vista, RCA's trade name for the early 60's color sets. Big problems in the day getting color reception in fringe areas, the lower noise floor of the tuner sold a lot of