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3. How can there be a final verdict when the problem is not yet defined? -Chuck Harris M Yachad wrote:

An earler post asked about using snubbers to save the contacts of switches & relays. Many of the same issues apply to both relay & switch contacts. I looked into factors reducing relay contact life a

Hello John, could you send us a few photos or even lend us such a knob? I am pretty sure Sir OConnell can do something for you! Tam --- With best regards Tam HANNA (emailing on a BlackBerry PRIV)

So what's the final verdict? 1 or 2? Mounted across the switch terminals, EITHER 1. A 10nF DC rated capacitor up to about 3000VDC OR 2. A 10nF AC Class X/Y capacitor rated to about 500VAC ??

After about two and a half years I was wondering if you have made any progress.

Well, it's all good, as they say.? Nice to learn a new phrase. Thanks! Jim Sent from my Verizon, Samsung Galaxy smartphone

No, FDM corresponds to the 3D printing he mentioned -- Fused deposition modeling == FDM == makerbot, etc.

Tam, I take it you mean EDM, Electric Discharge Machining.? A way to fabricate items not easily made using conventional milling and drilling.? I only know a very little bit about EDM because I

Esteemed Quorum, please forgive me for "soliciting my wares" - but I recently met an expert on FDM and CNC machining. He found an interesting space to spend spare time in my barely used heavy machine

Thank you, gentlemen; From this discussion, I now have a much greater appreciation for my venerable Pace unsoldering system. You have provided some additional thoughts for maintenance procedures. The

Just curious, has anyone ever tried 3D printing replacement knobs? My Tek equipment is all intact but I could use a few HP knobs as well as a couple of Genrad. That might be a nice little sideline for

MOV's are a rather blunt instrument. They have two voltages that are important, the first is their sustained voltage, and the second is their transient voltage. The sustained voltage must be higher

If you check my original post, you will see I used NTC. my later use of PTC was a typo on my part. Capacitors behave as short circuits to transient pulses. Because the snubber capacitor is there, the

Copied in below is Ed's excellent message 76038 about the 22xx singing power supply problem from 2012. tom jobe... Ed Breya Apr 29, 2012 It depends on the perception level. If a "piercing whine" means

Here's the link in the groups.io message base: /g/TekScopes/messages?msgnum=76038 Bob.

Craig Thanks for that info. Yes, I have seen other RIFA snubber combo units (cracked) which I junked, and replaced with separate R+C - but that was without doing any brainwork. Now I want to

For what it is worth, Quad (the audio company) used to use a RIFA 100nf/100ohm X2 snubber across the switch output. In other words not across the switch. That was present in the 33 preamp and FM4

Here's some background info on this: https://groups.yahoo.com/neo/groups/TekScopes/conversations/messages/76038 If you simply change some of the parts, it may apparently solve the problem because the

Snubbers are usually applied to dissipate the energy in reactive transitions. If you use a capacitor only, it will tend to form a resonant circuit that can ring. It's good to have some resistance

Kevin Thanks! My goal is to reduce/eliminate arcing in a mechanical switch (or across relay contacts) - that's all. 1. You've stated between 1-10nF is suitable - is there a definite method to