Lost shine... aka milky white solder joints... -Chuck Harris Chuck Harris wrote:

The 492, 494, and 496 SA's are compact devices simply stuffed to capacity with good RF stuff. To make sure they had absolutely the optimal space for that good RF stuff, they developed a state of the

I hadn't tried this adjustment while looking at the signal with another scope...I may have stumbled upon this without knowing since the slowest sweep on the 519 is rather fast compared to general

In my experience for removing grease and oil from stuff (foam filters, aluminum filters, clothes, etc) I use Dawn detergent. It does not contain phosphates. It is biodegradable and is fairly gentle on

I'm a bit confused, because I thought you had already tried this, but if it's all ok now, it's all ok now! Congratulations! -- Cheers, Tom -- Prof. Thomas H. Lee Allen Ctr., Rm. 205 350 Jane

Tom, I think I found it. Page 5-15 in the manual describes it: "76. Set the MULTIPLIER switch to OFF and check to see that the waveform disappears from the screen of the Type 519. If

I agree that looking for an open circuit somewhere, whether within or between components, makes sense. One clue is that the free-running frequency of the output is too high. Injection-locking needs

Hi there! New to the group, I posted this on Reddit at /r/rfelectronics first and was referred to here. I recently got a Tektronix 492 spectrum analyzer on eBay. I paid around $320 for it in a Best

I tried another thing, just to be sure...I substituted a 2N2369 (I have a lot of them on hand for building avalanche pulsers) that seemed to have largely similar curves as the existing

It doesn't use phosphates (which are not good for the environment)... but might not clean these old scope filters as well as a phosphate cleaner. Instead of phosphates, Scrub Bub uses a surfactant,

If you're talking about the hybrids with the 4 screws holding them, leave them alone. Other heatsinks may be thermal-epoxied to the chip and would be a lot of trouble to clean up and re-epoxy. Not to

Tom, It's all good; thanks for the explanation. I have not checked for dc level coming out of the multivibrator. I turned R931 (avalanche control) some and observed the effects. There is, as

The following photos have been uploaded to the 519 album of the TekScopes@groups.io

Tom, I put some photos in the album here: https://groups.io/g/TekScopes/album?id=255396 The trace shot is the output of the rate generator, at 10 ns/cm. The crt on this particular scoped is stated

I (still) have a laptoop with a PCMCIA slot. I'll be glad to give it a try. I'm in New Jersey, so if it's still available let me know, and if you take Paypal. Dave - AC2GL

Hi Roger, The electrolyte is water soluble. Use hot water, dish detergent and a soft toothbrush or paintbrush. Put some electrical tape on the tops of trimmers and dip switches, and scrub

Chuck, Thank you for your reply. Yes I could smell this while working on the components around the place where the are located. Is it necessary to repair each and every solder joint that is not

Hello Richard, I thought that we were engaged in discussions leading to a deal? Please confirm that S-100 is sold to someone else or is it to me? Cheers, Rick

There is one other way, and that is motorboating. The multivibrator multivibrates, causing a glitch in the power supply, which triggers the multivibrator. Just a thought... -Chuck Harris Tom Lee

Also, you say that the avalancher seems to be doing the right thing. Would you happen to have a screenshot or something to show what that output looks like? Avalanchers can exhibit several pathologies