a few more questions
OK, found the 5w 5% wirewounds - I wasn't sure if these would adequately substitute for the 1w resistors. I've updated my links above for the parts.
Next, I think I'm starting to figure out the rating scheme for transformers. First, a question about 22 volt secondaries: Why are you multiplying 22v by the square root of 2 to obtain 33 volts? Where does the sqrt(2)come from? From the bridge? Going back to Nelson's design, it appears that the specified transformer (118v primary, two 44v secondaries, 8A) is WAY more (704va primary!) than this design actually needs. Is this correct?
It looks like (using your logic) I could use a (slightly larger than needed) 400VA primary with two 25VA secondaries - should be more than enough. Is this correct?
Finally, I remember seeing Nelson's warning about substituting parts but the original output transistors are no longer available... Other people seem to have used the Motorolas without any trouble.
Thanks for your help!
[Edited by Eric on 12-07-2000 at 11:06 AM]