P
Phil Allison
Guest
** Hi,
I have a VOX AC100cp ( Chines made) on the bench - it is about 6 years old.
It has all its original parts but is in a very bad way. The known faults
are:
1. One (Ruby) EL34 has lost vacuum.
2. Two scorched 5W screen resistors, one detached from the PCB.
3. One blown HT fuse, a 1 amp slow blow - which may well not be the only
one.
4. Output tranny OPEN on one side of the primary and exhibiting symptoms of
shorted turns.
5. Bridge rectifier only conducting on one half cycle - giving 50Hz
ripple.
The scorched 5W resistors are on the side with the open tranny winding.
The EL34 with no vacuum is on the other side.
Wanna have a go at the sequence of failures ?
.... Phil
I have a VOX AC100cp ( Chines made) on the bench - it is about 6 years old.
It has all its original parts but is in a very bad way. The known faults
are:
1. One (Ruby) EL34 has lost vacuum.
2. Two scorched 5W screen resistors, one detached from the PCB.
3. One blown HT fuse, a 1 amp slow blow - which may well not be the only
one.
4. Output tranny OPEN on one side of the primary and exhibiting symptoms of
shorted turns.
5. Bridge rectifier only conducting on one half cycle - giving 50Hz
ripple.
The scorched 5W resistors are on the side with the open tranny winding.
The EL34 with no vacuum is on the other side.
Wanna have a go at the sequence of failures ?
.... Phil