A build based on Metasonix TX-1 guitar noisemaker with a
SE 6V6 output

It has a life of its own.
 

Maximum 300b (KR 842 VHD)

Pete Millet A2 Driver

Rod Coleman filament supplies

Buddha Camille Constant Current Source

Camille Cascode Constant Current Source (C4S) on the 6SL7

Three Toroidal Transformers 

Four Chokes

MOSFET B+ Regulators

Amphenol Umbilical Connectors

 

304tl - Finished!!!

Finished - Eimac 304tl Single Ended Mono Amps

They have a certain appeal

Construction was as modular as possible

Safety is critical in these amps as there is 1,100 volts on the heat dissipating plate cap

They also put out considerable heat.  Like sitting by a fireplace!

Stereo 6550 - The Dorm Amp

Building an SE 6550 amp with my Daughter

The little Output Transformers just would not do.  These are the full sized Edcors.  Now we have Bass

 Edcor 10 watt SE OPTs are fine as this amp is not asked to perform bass duties

Currently used to drive Klipsch Heresy speakers 80Hz and above.
Low end handled by a NAD2200 and a 12 inch passive subwoofer

It can provide a very high output

Building the 304tl

304tl

The tube cage is one of the most important aspects of this design. Without a safe cage, the amp is completely impractical with over 1000 volts on the heat sink plate connector. This cage uses custom cut glass and aluminum L brackets for construction. Sides and top use a metal screen from the big bin at Lowes.

Sides and top

These amps cover 4 chassis, each weighing over 50 pounds.  Being modular helped with construction but care had to be taken to ensure that the connections were safe and flexible.

Iron

Iron

Eimac - Scaling Up

"TL" or low mu tubes are much easier to drive than "TH" or high mu tubes.  Driving a TH tube takes a power amplifier circuit.  This is where MOSFETs shine.  The advantage of TH tubes like the 100TH below is that by the ver design, they have to be run in A2.  This makes them capable of producing a lot of power.  And because they are very difficult to work with, they are usually a lot cheaper.

Where do you go from there?  The 304TL of course.  Here we were able to find some 304TL tubes at a moderate price which allowed for good old fashioned A1 driven through a interstage transformer.

These are currently being built with 4 chassis.