Nakamichi PA-7 Power Transformer

[sourceoneaudio]

Hello Everyone,
I'm l@@king to buy a PA-7 Power Transformer. Anyone have an amp they are willing to part out or have an amp not worth fixing for sale???????

Contact Info:
sourceoneaudio@cox.net
623.695.4872

Thank you>>>>>>>> Have a Happy Holiday Season.

 

[eswaroop]

Same request

Im looking for a PA-7 transformer to replace as well.

 

[Mannegizen]

Blown thermo fuse in the transformer?

Check this thread:

Nakamichi PA-7II: Thermofuse in the potted transformer

 

[JonSnell Electronic]

Toroidal Transformers | RS Components
Select one of these. Check the dimensions first and use the secondaries to power both sides.

The usual cause of thermal fuse failure is poor mains connection, sparking at a socket etc.

 

[eswaroop]

Blown thermo fuse in the transformer?

Check this thread:

Nakamichi PA-7II: Thermofuse in the potted transformer

Nope - I thought the rail voltages should read +/- 60VDC but they are closer to + /- 75VDC each.. thought it may have been a short in the primary but it seems that the rail voltages are higher actually than what’s in the schematics

 

[Mannegizen]

Yeah, that is probably a cut n paste error in the manual.

The PA-5 should have about +/-60V.
The PA-7 should be around +/-80V

My PA-7E has roughly +/- 84V.
(a unit made for 220V~ but is getting feed with 235V~)

 

[eswaroop]

Yeah, that is probably a cut n paste error in the manual.

The PA-5 should have about +/-60V.
The PA-7 should be around +/-80V

My PA-7E has roughly +/- 84V.
(a unit made for 220V~ but is getting feed with 235V~)

definitely a bad typo ( and says same 60v on the circuit board as well! I actually ended up searching for a replacement everywhere and have a toroidal on order from parts-xpress before I found out the anomaly!

Don’t know if the rest of the schematic is good for replacing any caps by referencing values - does anyone know of a reliable service manual / schematic ?