SB-200 transformer

[K4FY]

I'm rebuilding a nice little Heath SB-200 amp and need a power transformer to finish the project. I would hate to part this out because it is a very clean amp. Any ideas? 73.
Gary
K4FY

 

[GnG8d]

Harbach Electronics is probably your best (not cheapest) option.

 

[Crusher]

I don't think Harbach sells transformers anymore. He might, but he sold all the Peter Dahl stuff to Hammond transformers is my understanding.

 

[wavrider]

you may also look and "gasp" MFJ for your transformer.

 

[GnG8d]

I hadn't heard that Crusher, good to know though.

 

[Shockwave]

Heathkit parts turn up on eBay all the time. I've seen the transformer for the 220 many times. I suspect if you check regularly, you'll find one for a 200 within a month. Antek also makes some good toroidal transformers for about $100. Their AS-8T80 could be a candidate if it fits. It produces 1500 watts PEP in intermittent communication service with no problems. It does not have the 80 volt tap used for cutoff bias and to power the relay. You could put a 12 volt relay in and simply use a 10,000 ohm resistor in the cathode circuit to place the tubes in cutoff during RX. I'd use a zener to bias the tubes on because the original bias circuit leaves a little to be desired anyhow. It's not so hard to wrap another winding on a toroid if you have patience. About 50 turns through a voltage doubler will replace the original bias winding.