Search found 1678 matches

by TUBEDUDE
Mon May 27, 2024 11:05 am
Forum: Fender Discussion
Topic: Conductive boards again.
Replies: 16
Views: 964

Re: Conductive boards again.

Fiberglass / G-10
by TUBEDUDE
Sun May 26, 2024 8:40 pm
Forum: Garage Talk
Topic: He's no James brown
Replies: 3
Views: 174

Re: He's no James brown

He must have given up the EMT gig.
by TUBEDUDE
Mon May 20, 2024 10:56 am
Forum: Technical Discussion
Topic: Common Mode Filtering - A slightly impractical approach to reducing heater induced noise
Replies: 22
Views: 881

Re: Common Mode Filtering - A slightly impractical approach to reducing heater induced noise

Are you using a toroidal power transformer? I'd be surprised to see 50kHz on the secondary of an EI transformer
by TUBEDUDE
Wed May 15, 2024 4:17 pm
Forum: Technical Discussion
Topic: Illinois brand capacitors still bad?
Replies: 29
Views: 1410

Re: Illinois brand capacitors still bad?

I have one of those cheap cap checkers (different brand) and I wonder if the measured value is similar when the cap is in circuit with high.voltage on the plates. The caps were measured out of circuit. I tried to make it as accurate as possible. Sorry I wasn't clear Mark. I meant after they were un...
by TUBEDUDE
Wed May 15, 2024 11:28 am
Forum: Technical Discussion
Topic: Does a 'bright cap' really boost highs?
Replies: 23
Views: 5943

Re: Does a 'bright cap' really boost highs?

Ha, thats great Max. I have from time to time imagined electron flow in strange analogous ways to give some visual to the actions. "But, to truly know the electron, you must "Be" the electron" - Bruce B+ Semi-sincerely yours, Phil D. To truly know the electron you must know quarks, quantum chromody...
by TUBEDUDE
Wed May 15, 2024 11:14 am
Forum: Technical Discussion
Topic: Illinois brand capacitors still bad?
Replies: 29
Views: 1410

Re: Illinois brand capacitors still bad?

I have one of those cheap cap checkers (different brand) and I wonder if the measured value is similar when the cap is in circuit with high.voltage on the plates.
by TUBEDUDE
Wed May 15, 2024 12:21 am
Forum: Technical Discussion
Topic: Illinois brand capacitors still bad?
Replies: 29
Views: 1410

Re: Illinois brand capacitors still bad?

Were they fresh off the shelf, or after some time under voltage to form the dielectric?
by TUBEDUDE
Mon May 13, 2024 11:44 am
Forum: Technical Discussion
Topic: Can I Parallel 2 Mosfets in VVR?
Replies: 38
Views: 1294

Re: Can I Parallel 2 Mosfets in VVR?

That is one hellified heatsink! With a fan across it, it should create frost on your FET.
by TUBEDUDE
Mon May 13, 2024 11:32 am
Forum: Technical Discussion
Topic: Hypothetical Amp Discussion
Replies: 9
Views: 576

Re: Hypothetical Amp Discussion

It looks like you have some soldering experience. A Champ is an easy build, but you might not really use it for much more than a training tool. A Deluxe might be of more use. It has a little more complexity. It might be a good starter for you as the circuit is push pull, like the amp you will finall...
by TUBEDUDE
Fri May 10, 2024 9:04 pm
Forum: Technical Discussion
Topic: Two 20 watt amps in one chassis - layout/grounding
Replies: 17
Views: 759

Re: Two 20 watt amps in one chassis - layout/grounding

Keep us posted on progress. And on the baritone also. I've had an interest in those and think my big hands need a vacation on the broad plank of a bari.
by TUBEDUDE
Fri May 10, 2024 1:32 am
Forum: Technical Discussion
Topic: Two 20 watt amps in one chassis - layout/grounding
Replies: 17
Views: 759

Re: Two 20 watt amps in one chassis - layout/grounding

Or separate pre and power chassis. I did a stereo pre (originally for my Betterbacker) and coupled it with a stereo KT66 power amp for my T. V.
20201217_170741.jpg
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Never mind Phil. I see from your other post this must fit in a Twin combo cabinet.
by TUBEDUDE
Tue May 07, 2024 9:21 pm
Forum: Technical Discussion
Topic: Hypothetical Amp Discussion
Replies: 9
Views: 576

Re: Hypothetical Amp Discussion

One tube per effects loop. Maybe half a tube, if you can steal the drive signal from the signal chain. . And if using a 6AW8 It's the only tube needed for both reverb drive and recovery. Anything can be done. To pull it off though you'll need a bit of experience. Have you built much, and have extens...
by TUBEDUDE
Tue May 07, 2024 9:00 pm
Forum: Technical Discussion
Topic: Bad power?
Replies: 10
Views: 438

Re: Bad power?

What gauge is the 100 yd. Wire? And does it power lights, heat or air conditioning also? You may have only 85 volts due to IR losses.
by TUBEDUDE
Tue May 07, 2024 8:55 pm
Forum: Technical Discussion
Topic: Two 20 watt amps in one chassis - layout/grounding
Replies: 17
Views: 759

Re: Two 20 watt amps in one chassis - layout/grounding

Phil you can have centered vol controls. Just have the input stages on each end. Your volume controls will be after several gain stages anyway so they're at line level now. Using shielded cable you should still get low hum.
by TUBEDUDE
Tue May 07, 2024 8:46 pm
Forum: Technical Discussion
Topic: HILGEN BASSO 2501 Bass Amp Help Needed....
Replies: 5
Views: 310

Re: HILGEN BASSO 2501 Bass Amp Help Needed....

Yes, with 3 stages feeding your splitter you can get enough gain to satisfy. See if your tech is up for the challenge. Of course after he has verified correct operation as it sits. He could find degraded parts and their replacement might make it sound to your liking.