GFA-555 transformer help

[ben62670]

I have a GFA-555 transformer, and all the secondaries are figured out, but I can't figure out the primary side of it.
Blk/Blu are in series.
Yel/Wht are in series.
It has a Brown, red, Org left. Where do I hook up 120, and nuetral?
1.3 Ohms between
Org/red, and Org/brown
.5ohms between Brn/red
Can I use 2 seperate 120(240) for more VA?
thanks
Ben

 

[ben62670]

OK I did a little playing around. I put some power to it. BIG BUZZ. This thing came out of a blown amp. The bridge rectifier was shot!.
OK so I have it hooked up to hot on the brown, and nuetral on the orange. I get 70vac on all outs. The only concern I have is 64vdc per out rectified. The red on what I thought was the primary is 24vac for the low voltage systems. I think this all checks out.
Thanks
Ben

 

[N-Channel]

How about contacting Adcom requesting info? I have to imagine they'd help out. Just a thought.

 

[orthoefer]

Searching this board, it appears that user "Mayank" has the service manual for this amp. You might send him an email.

Alternatively, this web company sells various service manuals.

 

[WithTarragon]

When I contacted Adcom, they e-mailed me PDFs for the 545 & 555 (series 2) at no charge.

I thought that was good service and public relations on their part.
-Tom

 

[ben62670]

Thanks guys
I will contact them.
Ben

 

[Mayank]

Ben:

I came across this older thread ... did you figure out the wiring for the GFA-555 transformer?

If not, I should be able to dig up my notes and post the color codes. The GFA-555 had options to wire the transformer for different voltages 100V/120V/220V/240V.

Rgds
Mayank