Scratch building a RCA SP20, help with transformer and OPT needs.

[Ken Boyd]

Ok I have a number of OPT's to choose from, now sourcing the power transformers. Looking over the drawings I think these are close to fitting the bill.

700VAC/200mA with a center tap, 6.3 V @ 5A CT, and 5v@3A.

These are Edcor transformers and I have used their transformers in the past with no problems.

XPWR179 - 700V@200mA CT, 6.3V@5A CT, & 5V@3A

EDCOR XPWR179 tube plate/filament power transformer. 120V 60Hz. to 700V(350-0-350)@200mA, 6.3V(3.15-0-3.15)@5A & 5V@3A.

edcorusa.com

 

[Ken Boyd]

I sourced two Hammond chokes, found them on Mousers site, they are on the way.

 

[nerdorama]

Just FYI at this point. Hawk Electronics seems to have the best prices on Hammond products.

 

[Ken Boyd]

Just FYI at this point. Hawk Electronics seems to have the best prices on Hammond products.

Thanks for the heads up.

 

[Ken Boyd]

I just lucked out on an auction and getting a console pull version of this amp which is basically the same amp short of the green chassis. But it does have all the same part number transformer and OPT and I will use this to reverse engineer the new pair I am building. I will compare the OEM RCA OPT and power transformer on my board trial build as I will test the outcome verses the original OEM.

There has been one of these for sale, but I was weaseled out of a pair a while back and now the one for sale is a single for double the price that the pair I was buying went for. I just couldn't force myself to pay the higher price. I have new aluminum chassis, and I think instead of painting them that forest green I will send it to the anodize shop that we use at work and have them anodized apple or forest green.