|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
63.246.183.22
In Reply to: RE: Variac posted by waterfall on April 26, 2017 at 04:56:01
It will be only marginally useful if it's not metered. A capacitor that doesn't reform properly can damage other components even the voltage is increased gradually. There's just no way to know what's happening without an ammeter. Unfortunately, metered variacs are pretty expensive, even the Chinese junk. I ended up building my own a few years ago.
--------------------------
Buy Chinese. Bury freedom.
Edits: 04/29/17Follow Ups:
I have a vintage (it was given to me when I was an apprentice) Amprobe RS3. Since it's a clamp on, no need to fuss over inline instrumentation. Just a thought. BTW the RS3 still is accurate after all these years. I use it generally around house wiring even though I have several much better pieces of test gear.
Edits: 05/01/17
I have a clamp-on too, but it requires a test jig to use. If you clamp it over the entire line cord, the induced flux from AC flowing opposite directions cancels, and the meter reads zero. It's great for house wiring, not so much for audio gear.
--------------------------
Buy Chinese. Bury freedom.
I understand and I suppose I wasn't definitive in my meaning. You showed us how you built an ammeter into your variac, very nice. Since the variac is on the power side it would work nicely clamped around the supply wire to the variac. For me a cheap if ineloquent solution seeing how infrequently I use the variac.
Edits: 05/02/17
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: