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Bonzoro last won the day on September 10 2018

Bonzoro had the most liked content!

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About Bonzoro

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    TO-39 Transistor

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    Retired Navy Electronics Tech

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  1. Here is a shot of the 400's big brother. Custom chassis, lighting etc.etc etc..... Show's what you can do to your 400 (And dig another 100 wpc out of it). Just finished this one for a gent an hour ago....
  2. Could be the ground going to the meters, or, there are a couple resistors and a couple diodes which are on the light board. These boards are USUALLY in pretty rough shape after 40 years. White Oak Audio Design has all the items to get that amp back into safe operable condition. The rest of the amp is probably in need of some updating ie.... DC Protection circuit, new bulk caps, new back planes, new control board..... They basically are ticking time bombs unless updated. They weren't made to last forever for sure. And when they fail...... Better have some eye protection on. Maybe a cup too
  3. It's probably the light board where the meter inputs run through it. I doubt that both meters went bad. They are pretty reliable. If somebody has been dorking around inside, that's probably it. Look at the schematic, probably an easy fix. Don't disassemble the meters or "Blow" on them or use canned air on them.
  4. Do the White Oak Audio upgrades to your amps with the DC Protection board and you won't need the fuses.
  5. Since I finished that one (And i'm glad it showed up in excellent condition) I have a new IR eye-ball and jack. The jack will mount on the back and the eyeball will mount anywhere you want since the wire is 3 feet long. The "antenna-magnet". works but is not perty at all. But, I like it because it folds down and hides like an old car. But, all in All, that pre turned out friggin awesome.... It was an enormous amount of work but the sound is THERE. I hope you enjoy it.... The work it took to get the spooge off the board was never ending. And, the switches had taken a beating and were bleeding goo.... I have another C-1 (in anthracite) in the que which I will do the same for. but I have a few builds ahead of it.
  6. I use the bulbs with 3 wattage settings (30-60-100) in my DBT for use on Large amps (100Watt) to smaller pre's and such (30-60watt).
  7. DON'T lube your meters..... Yer asking for trouble (or more trouble). The movements can be cleaned properly and restored back to a normal working condition if they are sticking. The movements are touchy and applying lube will cause them to attract more scuzz (that's a technical term ). I have had good luck with careful disassembly and service. Also, do NOT USE any type of compressed air.... No.... no
  8. I'm south of you just outside of Sierra Vista, let me know if you need some help. Welcome aboard. Perry
  9. what do you think about the 4000t as a match for the tube amp?
  10. Congrat's on the medals guys, keep up the outstanding work. Perry
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