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In Reply to: RE: switches and arcing posted by FenderLover on May 29, 2015 at 18:17:14
There is a device called Quencharc, IIRC. It is a dipped high voltage cap with a built in internal resistor precisely for the application you are looking for.
CDE makes and IIRZC Digikey carries them.I simply place a dipped high voltage mica cap right across the switch terminals. 01 uF or greater.
PS I like them on all solid state rectified tube gear. They usually have a big surge which can eventually fry switches
Edits: 05/29/15Follow Ups:
"PS I like them on all solid state rectified tube gear. They usually have a big surge which can eventually fry switches"
Taming the surges is exactly what negative temperature coefficient (NTC) inrush current limiting thermistors are for. ;> )
Using a cap. on switches to tame arcing is certainly a very reasonable thing to do.
Eli D.
work on both AC and DC switches?
1. The current surge:
This can be resolved using a thermistor like Eli suggested.
2. Arcing from the inductive kick:
Many companies use a series R/C package like Unclestu mentioned to minimize this effect. I think back-to-back transient voltage suppressors would do a much better job, although at higher cost.
The bottom line is that a standby switch probably needs both issues addressed to have a long and happy life. :)
--------------------------
Buy Chinese. Bury freedom.
stu
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