Search found 251 matches

by Masco
Wed Jul 09, 2025 4:03 pm
Forum: Technical Discussion
Topic: Vox AC4TV - Adding a Screen Resistor?
Replies: 14
Views: 1067

Re: Vox AC4TV - Adding a Screen Resistor?

I would suspect the 160mA fuse was not the heater fuse. How's the bias?
Coupling cap from previous stage leaking?
by Masco
Mon Jun 30, 2025 3:02 pm
Forum: Technical Discussion
Topic: LCR Meter purchase advice.
Replies: 13
Views: 1175

Re: LCR Meter purchase advice.

Disregard above post. Ad misleading, this is for CASE ONLY -without meter or accessories. Sorry!
by Masco
Mon Jun 30, 2025 2:47 pm
Forum: Technical Discussion
Topic: LCR Meter purchase advice.
Replies: 13
Views: 1175

Re: LCR Meter purchase advice.

by Masco
Wed Mar 19, 2025 3:12 pm
Forum: Technical Discussion
Topic: Harmony 525 preamp with parallel triodes
Replies: 2
Views: 568

Re: Harmony 525 preamp with parallel triodes

Look at Supro Thunderbolt schematic, practically the same amp with a few cap value differences for bass.
by Masco
Sat Jan 11, 2025 2:54 pm
Forum: Technical Discussion
Topic: new tonestack calculator
Replies: 5
Views: 1389

Re: new tonestack calculator

Mucho thanks why-trv!
by Masco
Tue Oct 15, 2024 1:31 pm
Forum: Technical Discussion
Topic: Potentiometers with a Centertap
Replies: 4
Views: 2636

Re: Potentiometers with a Centertap

Other than bias circuits, tapped pots are used in some Fender eq circuits. I believe these are 70% taps.
Mark Bartel uses CT pots for the eq in his amp line.
I wish these were more available these days. It’s a PITA trying to roll your own.
by Masco
Fri Mar 29, 2024 5:46 pm
Forum: Technical Discussion
Topic: The Lost Art of Cable Lacing
Replies: 17
Views: 3466

Re: The Lost Art of Cable Lacing

Man, those zip ties will cut you up working inside a rack. Some cutters leave a sharp edge when shearing off the excess. -Another good thing about lacing!
by Masco
Tue Mar 26, 2024 1:28 pm
Forum: Technical Discussion
Topic: The Lost Art of Cable Lacing
Replies: 17
Views: 3466

Re: The Lost Art of Cable Lacing

DC plant wires are still being somewhat laced in ISP/cable hub headends. They don’t use zip ties, everything tied off using the waxy rope.
by Masco
Fri Nov 10, 2023 2:54 pm
Forum: Technical Discussion
Topic: Looking For Amp Transformers
Replies: 10
Views: 6804

Re: Looking For Amp Transformers

Anyone have any experience with Musical Power Supplies iron?? https://www.musicalpowersupplies.com/products/
by Masco
Thu Mar 30, 2023 3:06 pm
Forum: Technical Discussion
Topic: New hand wired 62 Princeton.
Replies: 13
Views: 2339

Re: New hand wired 62 Princeton.

Is that a 1 ohm R in the cathode I see for bias adj.?
by Masco
Mon Dec 12, 2022 11:16 pm
Forum: Technical Discussion
Topic: Hum neutralizing circuit
Replies: 11
Views: 2674

Hum neutralizing circuit

https://youtu.be/3fdkUvnmI9w
I thought this was rather Brilliant.
Single ended only.
by Masco
Sun Aug 21, 2022 1:07 pm
Forum: Technical Discussion
Topic: Shipping costs going up?
Replies: 25
Views: 4654

Re: Shipping costs going up?

dorrisant wrote: Wed Aug 17, 2022 8:36 pm $7.99 is the minimum shipping cost I'e seen for years.
You're probably right, it's been a really long time since I've needed a single part. I'm starting to geez...
by Masco
Sun Aug 21, 2022 12:36 pm
Forum: Technical Discussion
Topic: Mercury Magnetics issues?
Replies: 21
Views: 4312

Re: Mercury Magnetics issues?

Gave up on them like a decade ago for many reasons. Not listing full specs of their products online should be a warning sign.