New 6M Amp Status

[Charlie Young]

I pulled the amp out of the upper garage to do a close inspection.   We did this on the driveway.  Due to the size of the amp I am not taking it to the shop until the work is ready to begin. 

It was looked over closely.  See nothing missing or damaged.  the workmanship of the chassis and wiring is first class.  The design appears  to be a step up from the normal 6 meter conversions, including mine.   

This one has 2 coils in the plate circuit, to provide extra harmonic suppression and wider impedance matching range over the single coil versions. 

The input and output compartments are in separate shielded enclosures. 

The tune cap is a big 3 aiir variable capacitor.  The load cap is a Jennings vacuum variable.  The wire connections are very short between components, perhaps as close as is practical. 

It has a plate choke that is wound from heavier ga wire than is common.

The amp is equipped with a front panel variac to adjust the filament voltage.  There is a filament voltmeter on the front panel. 

The load cap and plate blocking cap are rated at 7500 VDC.

As equipped the amp was not being used anywhere near the tube max rating.  I would guess 4 to 5 KW as-is, based on the full scale reading on the plate current (1A) and HV meters (5 KV).  He was likely running at or near legal limit. 

73 Charlie N8RR