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Disuse
Jan 18, 2020 16:15:50 GMT -5
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Post by rickyguitar on Jan 18, 2020 16:15:50 GMT -5
I have an amp i built from a kit years back. Woodcross was the brand, a start up that never quite took off. Cathode bias 15 watt head. I never played it a lot and have not played it in probably 5 years. Is there anything I should look out for before, or when I fire it up?
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Disuse
Jan 18, 2020 16:17:30 GMT -5
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Post by Leftee on Jan 18, 2020 16:17:30 GMT -5
Not really. Make sure the speaker is hooked up and turn the volume all the way down and have at it.
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dlxrev
Halfnote
Posts: 60
Formerly Known As: DLXREV
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Disuse
Jan 23, 2020 9:21:32 GMT -5
Post by dlxrev on Jan 23, 2020 9:21:32 GMT -5
Fretboard Journal has a vintage amp podcast with Skip Simmons and I recall him recommending a variable voltage transformer to slowing bring it up to 110VAC to reduce the chance of blowing dried capacitors.
At about 1:04
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Disuse
Jan 24, 2020 23:04:24 GMT -5
Post by Peegoo 🏁 on Jan 24, 2020 23:04:24 GMT -5
Modern caps don't need "forming" like the older stuff used to require. If you want to play it safe, use a 60-watt incandescent light bulb as a current limiter.
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Disuse
Jan 25, 2020 14:16:36 GMT -5
Post by Jim D. on Jan 25, 2020 14:16:36 GMT -5
The light bulb is simply in series with black (hot)?
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Disuse
May 3, 2020 4:42:07 GMT -5
Post by LTB on May 3, 2020 4:42:07 GMT -5
Modern caps don't need "forming" like the older stuff used to require. If you want to play it safe, use a 60-watt incandescent light bulb as a current limiter. That subject "Forming a cap" was a source of contention among the older techs and the rest. My leadman said he could hit a cap quickly with 120vac and 70 to 80 percent according to him would be salvaged. Most of the younger techs just stood back in amusement awaiting one to blow up in his face. LOL |
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