Cool, is it a stock rebuild, or did the guy do any mods?
Here's the deal:
All new pots, new input selector switch, all new RCA jacks, all new speaker connecting jacks allowing for banana plugs or bare wires or spades
Entirely rebuilt with all electrolytic caps from Sprague Atom, circuits caps a combination paper in oil caps and silver micas, all of identical value as original design
All new resistors (all plate resistors are carbon comps), Dale power resistor
All new pots, including two Alps for volume (250k) and balance aka "focus" (1Meg).
Tone control section entirely rebuilt with polystyrene caps, carbon comp resistors and dual pots
Multi-section power supply cylindrical cap is brand new as well
Every single wire inside is Silver plated/Teflon. NO PVC anywhere...
Power switch (formerly on treble pot has been moved to the rear)
Grounding screw for turntable has been added.
All new stainless steel hardware
All new tube sockets with brand new tube shields for tone control tubes and phono section tubes
New three-prong power cord, therefore amp is now properly grounded. Safety "death cap" also replaced with x/y rated.
Phono section entirely rebuilt as well with RIAA EQ components moved under chassis for noise free operation
Overheating power supply tranny replaced by brand new replacement clone made by original tran's manufacturer for years of buzz/hum free operation (a MUST for all HF81 as that is)
Output transformers original of course and 100% free of noise of buzz of any sort.
Tubes complement is ENTIRELY Mullard/Blackburn plant vintage made in England and was tested with calibrated TV7 tube tester. Quad of Mullard EL84 picked and properly matched in pair by for current draw with digital Maximatcher tester. All tubes are almost all perfect in terms of Mullard ink.