ok so it looks like there was success right out of the ring putting all these upgrade/refresh parts in. thanks to great people on this forum who helped lead me in the right directions
ODDBALL things i noticed-- i set the bias's to 1.56,(bios was set in the middle of the pot just about exactly where it was originally with the selenium rectifier)) tipped it back. got bios reading of 1.44. i was like HUGH???... checked it again at the port,set to 1.56(it was only a tad off at 1.47) tipped it back again.. seemed stable, but off by .02v high on the right.. that was wierd!..no?
so i left it like that, wasnt gonna chase my tail for .02 volts
OK..so
for the rectifier the following- diode D544042R, (NTE552?), caps 2- 110v 100uf polarized, 4 10k 1-watt resistors(2 existing, 2 added)
for the output capacitor - 80/40/30/20 525v dynaco quad cap
for the driver board -
4 - metal poly 0.1uf 600v caps
2 - metal poly 0.047uf 640v caps
2 - silver mica 82pf 500v caps
2 - silver mica 390pf 1000v caps
METER- JTR Instuments.--model DMM-300-
I tested all volts for 100's in the 1000v position...all 10's in the 200v position and all 1's in the 20v position
tested afyter warming up 20 minutes, with a 8 ohm 50 watt shunt on the speaker terminals,and shorted rca plugs on the inputs.
now, what i have for readings.
power into tranny from wall outlet, 118.5
DIODE RECTIFIER- 55.2v ac in / 73v dc out
DRIVER BOARD PINS
3---378
18--377
QUAD CAP
IN ORDER FROM 1-4 as in manual(1 being toward the back) LOOKING UNDER CHASSI
1 2 3 4
434----447----306----378
TUBES
_____PINS______1_______2_______3_______4_______5_______6_______7_______8__
5AR4 444 367 367 444
LF EL34 1.55 6.38ac 433 437 -30 -30 6.38ac 1.55
LR EL34 1.55 6.39ac 432 435 -30 -30 6.39ac 1.55
RF EL34 1.57 6.36ac 430 433 -29 -29 6.36ac 1.57
RR EL34 1.57 6.38ac 429 432 -29 -29 6.38ac 1.57
the amp is dead silent
but is there anything odd looking?
ODDBALL things i noticed-- i set the bias's to 1.56,(bios was set in the middle of the pot just about exactly where it was originally with the selenium rectifier)) tipped it back. got bios reading of 1.44. i was like HUGH???... checked it again at the port,set to 1.56(it was only a tad off at 1.47) tipped it back again.. seemed stable, but off by .02v high on the right.. that was wierd!..no?
so i left it like that, wasnt gonna chase my tail for .02 volts
OK..so
for the rectifier the following- diode D544042R, (NTE552?), caps 2- 110v 100uf polarized, 4 10k 1-watt resistors(2 existing, 2 added)
for the output capacitor - 80/40/30/20 525v dynaco quad cap
for the driver board -
4 - metal poly 0.1uf 600v caps
2 - metal poly 0.047uf 640v caps
2 - silver mica 82pf 500v caps
2 - silver mica 390pf 1000v caps
METER- JTR Instuments.--model DMM-300-
I tested all volts for 100's in the 1000v position...all 10's in the 200v position and all 1's in the 20v position
tested afyter warming up 20 minutes, with a 8 ohm 50 watt shunt on the speaker terminals,and shorted rca plugs on the inputs.
now, what i have for readings.
power into tranny from wall outlet, 118.5
DIODE RECTIFIER- 55.2v ac in / 73v dc out
DRIVER BOARD PINS
3---378
18--377
QUAD CAP
IN ORDER FROM 1-4 as in manual(1 being toward the back) LOOKING UNDER CHASSI
1 2 3 4
434----447----306----378
TUBES
_____PINS______1_______2_______3_______4_______5_______6_______7_______8__
5AR4 444 367 367 444
LF EL34 1.55 6.38ac 433 437 -30 -30 6.38ac 1.55
LR EL34 1.55 6.39ac 432 435 -30 -30 6.39ac 1.55
RF EL34 1.57 6.36ac 430 433 -29 -29 6.36ac 1.57
RR EL34 1.57 6.38ac 429 432 -29 -29 6.38ac 1.57
the amp is dead silent
but is there anything odd looking?