SuperCharging the Champ Head
Want double the power of the Champ Head but keep the sweet class A tone? Then read on!
The Champ Head can deliver some serious drive by beefing up the power supply and adding another 6V6 output tube in PARALLEL! We also offer a SuperCharged Champ Head kit. Price for the new kit is $249 with the punched option and tone control and multi- tap Hammond 125J output transformer and Hammond 270CAX power transfomer. The 270CAX has a tapped 6.3 volt heater winding for lowest hum.
It is even Sweeter with a 125CSE Output transformer Add $15 for this sweet sounding transformer!!!

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Custom Built Supercharged Champ Head


This one has a 125CSE , cloth wire, cutoms aluminum knobs, and a single point grounding system and master volume. It is QUIET!!!!! - Assembled $410 plus shipping

Mini-Amp Project



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Beautiful Mini Amp built byCharles Osthelder


Thsi little amplifier is an off-shoot of a larger triode amp I developed

last year. The large amp used three 6S4As in parallel and developed

a whopping 6 watts output (approximately). The little amp here

will probably blast out 2 watts of full triode tone. I am in the process of

prototyping the little jewel and will have pictures soon.  I plan to put it in a

Hammond 1441-18 and build a wooden enclosure. A Mojo MP10R or 8"

Champ style speaker should work great. Be sure to use an efficient

Alnico speaker if you build it. Two watts won't push much sound out of

a ceramic magnet speaker.Here is what I have done so far

 

Mini-Amp Schematic Diagram

Mini-Amp Tag Board Layout

 

Mini-Amp Parts List

6S4A Tube

12AX7WA Tube

Novar 9 Pin Socket (2 required)

Hammond 1444-16 Aluminum Chassis

Hammond 125C Output Transformer

Hammond 269EX Power Transformer

Line Cord

Fuseholder and Fuse

1 Meg Pot and Switch

1 Meg Pot

Chicken Head Knobs (2 required)

Tag Board with rivets (assembled)

47uF, 350 volt Electrolytic  (3 required)

10uF, 350 Volt Electrolytic

22uF, 25 Volt Electrolytic (2 required)

.1uF, 630 Volt Polyester

.022uF, 630 Volt Polyester

500pF Silver Mica

.0047uF, 630 Volt Polyester

1N4007 Diode (2 required)

All resistors listed on schematic

Harware required to assemble amp

Wire, 22 guage solid core, 5 colors

Input and Speaker Jack,shorting

 

STF Electronics offers a complete parts kit for $155 which

includes basic instructions!!

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