The replacement power supply wires are different colors then then my dynaco s70 Power supplies are both pa060
What i can do is measure the voltage of the replacement power supply and label them .
If i had a actual picture where these wires soldered too i could connect it back in easily . Picture should have the voltages . All the old factory wires are still connected .
I cant tell you the factory wire colors faded I am not sure what year my amp is its old possibly 1960s Bought i use
If you have this please share .
What i can do is measure the voltage of the replacement power supply and label them .
If i had a actual picture where these wires soldered too i could connect it back in easily . Picture should have the voltages . All the old factory wires are still connected .
I cant tell you the factory wire colors faded I am not sure what year my amp is its old possibly 1960s Bought i use
If you have this please share .
Take good photos of your present amp circuitry before disconnecting the leads to assist you.
Also download the manual if you haven't.
Which replacement transformer do you have? Is it intended for use in this amplifier?
If there are more leads than listed below, state them here before proceeding further.
An ohm meter can help you tell the leads apart. Color coding may vary, however.
primary (2 leads, black - black ) for input AC power
HV secondary (3 leads, red - red - red/yellow is center tap) for B+
bias tap (one lead, red/black) for bias circuit
filament #1 (3 leads, green - green - green/yellow is center tap) for left channel tubes filaments
filament #2 (3 leads, brown - brown - brown/yellow is center tap) for right channel tubes filaments
filament #3 (2 leads, white - white ) for rectifier filament
Also download the manual if you haven't.
Which replacement transformer do you have? Is it intended for use in this amplifier?
If there are more leads than listed below, state them here before proceeding further.
An ohm meter can help you tell the leads apart. Color coding may vary, however.
primary (2 leads, black - black ) for input AC power
HV secondary (3 leads, red - red - red/yellow is center tap) for B+
bias tap (one lead, red/black) for bias circuit
filament #1 (3 leads, green - green - green/yellow is center tap) for left channel tubes filaments
filament #2 (3 leads, brown - brown - brown/yellow is center tap) for right channel tubes filaments
filament #3 (2 leads, white - white ) for rectifier filament
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A pictorial diagram might help. See post #4 in the thread below.
https://dynacotubeaudio.forumotion.com/t4921-st-70-chassis-ground
https://dynacotubeaudio.forumotion.com/t4921-st-70-chassis-ground
My wires are so faded Pointless to post pics . Its gone . The power supply melted down and almost caught fire !
What i think will work is this . If anybody knows the voltages of these points where the power supply connects . all i need to know ,
Never fun to have your main amp down begging for help .
https://postlmg.cc/vcSzdX8H
What i think will work is this . If anybody knows the voltages of these points where the power supply connects . all i need to know ,
Never fun to have your main amp down begging for help .
https://postlmg.cc/vcSzdX8H
The manual posted has all of the DC voltages.
Bear in mind that other components may also be bad and should be tested first.
For example, the main quad capacitor and the rectifier tube.
Bear in mind that other components may also be bad and should be tested first.
For example, the main quad capacitor and the rectifier tube.
https://www.dynakitparts.com/wp-content/uploads/PA-060.pdf
I found what i was looking for . I am not a electronics expert looking at wiring diagrams with all the owners manual .
This will help me get it going thanks for helping .
I found what i was looking for . I am not a electronics expert looking at wiring diagrams with all the owners manual .
This will help me get it going thanks for helping .