Yaqin MS-300C Tube Amplifier (300B, 274B

“Aesthetic” mods for the heck of it.

Mods & upgrades: preamp tubes (Tung-sol & JJ gold pins) rectifier tube (thetubestore "Preferred Series" 274B), a few capacitors, much larger resistors before all the LEDs to dim, and a very novice carpentry attempt to make
a volume knob, source buttons, and transformer covers.