Just sharing some CNC project progress from today
I’m a serial project starter. 2024 I’m a project finisher. I bought a blown up Blues Junior a few years ago and all I've done with it is steal the speaker out of it. I bought a hobby level CNC machine...
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New Bassman Micro LTP EF80 Build and question about output tap
Hi, I started a new build, a 5F6 Bassman Micro LTP EF80, wiwh I took schematic from Robinette'ss website. The Schematic is here but I : 1) don't put a NFB switch 2) neither a tone switch 3) Instead of...
View ArticleDIY single-channel "Deluxe Reverb" build in a Princeton chassis and cabinet
TL;DR: I built a single-channel Deluxe Reverb-style amplifier into an existing Princeton Reverb chassis and cabinet, reusing the transformers, pots, switches, pots, jack, reverb tank and so on, but...
View ArticleKen Fischer's, The Trainwreck Pages
I really like Ken Fischer's article, The Trainwreck Pages, so I spent a crap load of time putting the original poor quality scanned PDF file through optical character recognition (OCR) and a bunch of...
View ArticleGrid Stoppers/Leaks On Cascaded Stages
Hi- I'm doing a BF Fenderish build, with an extra gain stage - wondering if and what values for the grid leak/stopper on the 3rd stage? Flow looks like this: triode ==> tone stack ==> gain pot...
View ArticleBlackvibe (R.Robinette): Another crackling problem
Here we go again. A few months ago I had a crackling noise with my Vibro Champ build, but that problem was solved by shortening the grid wire. Now I'm working on a 6V6 "Blackvibe" build that has a...
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Does anyone recognize this pic, or this TB Tonestack mod?
Somewhere in my travels back in the summer of '21, I saved this pic to my hard drive, and I named it "tb_tonestack_tricks": Unfortunately, I don't know where it came from, or where I copied it from. I...
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Blackvibe 6v6 (First Build)
Hi all, I'm beginning my journey into amp building by starting with Rob Robinette's Blackvibe 6v6 head with an added Trainwreck-style PPIMV. I am currently putting together my own BoM, as being in the...
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YAMAHA JX30 new speaker help me choose from these 8
Looking to upgrade the 12" in my Yamaha JX30 30 watt solid state Eminence 1258 Eminence GA-SC64 Eminence GA-SC59 Eminence JS1250 Mojotone AN12C Celestion 50W A Type Celestion G12M65 Creamback Celestion...
View Article6P3S / 6N2P 5F2A Princeton Build - voltages and such.
Just wanted to log this one in the books. Will post voltages later this evening when I get it buttoned up. PT - Antek AS-05T280 OT - Hammond 1750B Basic 5F2A circuit with 30/30/16 filtering. Tubes will...
View ArticleHelp Me Find a Chassis
I'm contemplating a custom amp build for a friend. It will be a combo with reverb. I'd like to see if there is a pre-drilled chassis I could buy off the shelf that would meet my requirements. 5 noval...
View ArticleCurious in Paraphase Inverters
I have been very curious in Paraphase Inverters lately and trying to get my brain wrapped around them and the different configurations they come in. Seems like there are some different styles in which...
View ArticlePrinceton 1164 project
So I have posted about this build in a few places but I think a new thread would be simpler. Building an AA1164 Princeton using Deluxe Reverb power and output transformers. I received my last order...
View ArticleSingle-channel EL84 Ampeg-ish Gemini in an 18W chassis?
I've got a hankering to jam a single-channel, EL84-powered Ampeg Gemini circuit into an 18W chassis I picked up some years back on the cheap, using the 18W PT and power section... I don't have a great...
View ArticleBassman/Plexi Inputs - internal jumper - two jacks
Thinking through a mod to a bassman/plexi style 4 hole input setup - would like to have just two jacks (that could theoretically be used to input 2 guitars simultaneously) that would hit the bright and...
View ArticleLong awaited return of Astron caps!
Heads up- looks like Astrons are on the way! ASTRON CAPACITORS Home of vintage reproduction Astron Capacitors. www.astroncaps.com
View ArticlePrinceton Reverb AA1164 Blackface from drawing table to stage boards
The title is partly a fact and partly a hope... since my band split up... I've serviced for hobby some tube amps, and after building a lots of stomboxes, in 2022 I decided to go to the next level,...
View ArticleMulti-Meter suggestion?
Hey all, I am in the market for a new multi meter. I have had the same one for at least a decade and it's great but I realized I'd love to have capacitance, along with voltage, current and resistance....
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New head and cab for my Benson Vinny
A few years back I got my hands on a bare chassis Benson Vinny. At the time, I built a pretty nice looking head cabinet to hold it. I even contacted Benson Amps and asked for a badge. I thought it was...
View ArticlePrinceton Reverb Questions
So I finished my Princeton Reverb today. I have a deluxe OT, a Hammond 290CBZ PT (which is 650VAC@120mA with a very convenient 38VAC bias tap and 3A on the 5V line), no tremolo and a 10k mid pot like...
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