05-02-2017, 02:40 PM
found the problem.... see below picture.
it was all wired correct and to my frustration i powered down to simply start swapping out all the tubes to shot gun it.
i looked down and noticed C101 originally had rivits but i used screws to mount it after i restuffed the cans.
Earlier i kept saying C101 is *NOT ALLOWED* to have a chassis bond directly to chassis?
well i caused it to do just that.
THere is a metal retainer ring in the bottom with lugs that was originaly used to collect the negative sides of the capacitors. My mounting screws were touching the can,, the screws screwed into the chassis and the heads rubbed / touched the cans thus bypassing all together the Candohm R100.
I changed the screws out for smaller profile heads and adjusted a few things.
another sorta hard problem to find but i got it only after getting the help i needed to focus on the possible defective area. Thanks!
new readings: Does this look any better?
Note the code 125 update says that V1 is to be a 7AF7 so all volage readings will be at least 20v higher than normal. Right now due to my R102 being 500ohms instead of 300, i think when i move to a 300ohm these voltages are going up!??
Part DCv across DCv in DCv out comments
R101 22 21.8 0 Candohm
R103 44 307 263
R101 81.5 307 222
R102 41.2 349 306 supposed to be 300ohm, using 500ohm for now till parts ship
V6-3 -- 300 -- 6k6 pin 3 tied to audio output xfrmr primary
v7-3 -- 300 -- 6k6 pin 3 tied to audio output xfrmr primary
it was all wired correct and to my frustration i powered down to simply start swapping out all the tubes to shot gun it.
i looked down and noticed C101 originally had rivits but i used screws to mount it after i restuffed the cans.
Earlier i kept saying C101 is *NOT ALLOWED* to have a chassis bond directly to chassis?
well i caused it to do just that.
THere is a metal retainer ring in the bottom with lugs that was originaly used to collect the negative sides of the capacitors. My mounting screws were touching the can,, the screws screwed into the chassis and the heads rubbed / touched the cans thus bypassing all together the Candohm R100.
I changed the screws out for smaller profile heads and adjusted a few things.
another sorta hard problem to find but i got it only after getting the help i needed to focus on the possible defective area. Thanks!
new readings: Does this look any better?
Note the code 125 update says that V1 is to be a 7AF7 so all volage readings will be at least 20v higher than normal. Right now due to my R102 being 500ohms instead of 300, i think when i move to a 300ohm these voltages are going up!??
Part DCv across DCv in DCv out comments
R101 22 21.8 0 Candohm
R103 44 307 263
R101 81.5 307 222
R102 41.2 349 306 supposed to be 300ohm, using 500ohm for now till parts ship
V6-3 -- 300 -- 6k6 pin 3 tied to audio output xfrmr primary
v7-3 -- 300 -- 6k6 pin 3 tied to audio output xfrmr primary