BELL & HOWELL: Model 601 Amplifier Conversion Project

Screenshot 2024 11 24 at 3.23.52 pm 19bbff518f98

When I started this project, I knew some people prefer to keep these amps stock. However, running something with electrolytic capacitors from 1948 seemed like a disaster waiting to happen. If one failed, it would be a nightmare to fix. In fact, if anything failed, the cramped design would make repairs extremely difficult. On top … Read more

PHILIPS: 976B Valve PA Amplifier, 8 watts

Philips 976B front b86800e68b09

eBay purchase – it listed a bit on the high side, but after a quick chat the seller revised the price down to something very reasonable, so I couldn’t pass it by. External references:  Tim Robbins blog.  Radio Museum  PHILIPS MODEL 976B, VALVE PA AMPLIFIER Made in Australia in the mid to late 1950s, this … Read more

GRETSCH: Model G6151 & G6150 guitar amplifiers

Gretsch model 6150 amplifier schematic 0d86a1f66d30

Two great little guitar amps made by Valco for Gretsch – probably best to describe them as direct competition for the Fender Champ, but with some fancier appointments for the time.   Pretty sure there’s a Supro equivalent that was also made by Valco for these two as well. Supro 1606 for the 6150. Both small … Read more

FENDER: Tweed Champ Schematics

Fender Champ 5C1 schematic fa436337dd3e

I know these are everywhere, but humour me – this is mainly for my own reference. FENDER CHAMP-AMP,  5C1 (WIDE PANEL TWEED) Note: The Fender Champion 600 and 800 are said to use the same schematic (or at least extremely similar). Preamp: 6SJ7 pentode, grid-leak biased (no cathode resistor) Inputs: two jacks, each 75k in … Read more

STROMBERG CARLSON: AU-58 Valve Amplifier

Strom 1 b4726bf8330c

Unfortunate update.   The person I was buying this off accidentally dumped it for scrap before I could pick it up…  damn    ——————————- If you’re wondering why I haven’t been posting vero layouts – I have been busy finishing some customer orders and researching a few things (not to mention life in general).  I’m … Read more