SUPRO: Super Six, Model S6606 Valve Amplifier
Valco made, Supro single-ended valve amp, very much the same as the Gretsch 6150 / 6151 SUPRO SUPER SIX, MODEL S6606 12AX7, 6V6, 5Y3 8″ Jensen speaker, 3.2 ohm OT 2640 PT 3036 B+ 300v 4.5w
vero-p2p
SELMER: Corvette, Little Giant & Mercury
SELMER CORVETTE SELMER LITTLE GIANT MKI & MKIII SELMER MERCURY 5
GRETSCH: Model G6151 & G6150 guitar amplifiers
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 Princetons
I’ll start with the Fender 5F2A Princeton, as this is generally considered to be “the one” for a lot of people. Basically take a tweed Champ, and add the classic Fender one knob tone control, which has no insertion loss, and you’re in business. It’s hard to go wrong with this formula, which is why … Read more
FENDER: Tweed Champ Schematics
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
PLESSEY: Vintage Australian Guitar Speakers
Following on from the Rola post, I thought I’d split the posts, as it was getting a tad long. Long story short, Plessey bought Rola in the mid-sixties and the line evolved into the seventies. For a while they carried Rola and Plessey names. PLESSEY SPEAKERS The Plessey C12P is the go to for … Read more
ROLA: Vintage Australian Guitar Speakers & Transformers
Rola is better known as an American speaker maker, but there was also Rola Australia, based in Melbourne, which made speakers, transformers, chokes, and other related items. They also produced speakers in the UK and NZ. As a local manufacturer of quality products, Rola Australia found its way into many Australian-made guitar amps. Their biggest … Read more
VOX: Modded Vintage AC-4 schematic and tagboard layout
While I’m in the process of modding / rebuilding some Vox amps, I thought I might try the original Vox AC-4 from 1962, or at least a simplified version of it. Here’s a link to the full vintage Vox AC-4 schematic and amp details. Apart from the simplicity, I want to try something with an EF86 … Read more
VOX: AC-4 Guitar Amplifier Schematic (original version)
This is the original Vox AC-4, not much like the current line-up at all, apart from the low wattage. Volume Tone, on/off Speed Foot switch for trem (vibrato) – no depth control 8″ 3ohm speaker made by Elac ~3.5 watts RMS EF86 preamp pentode EL84 power pentode EZ80 rectifier ECC81 for trem VINTAGE VOX AC-4 … Read more
VOX: AC4C1-12 Transformer Upgrade
Before I completely rip this Vox AC4 apart and rebuild the amp on tagboard, I thought I’d try swapping the output transformer (OT), just to see if it made any difference to the sound of the amp, as I’ve read conflicting views online. Cutting a very long post short – yes it did make a difference, … Read more