Jawari question (hey Dean, help!!)

[inverseroom]

I'm building the Jawari and there seems to be no indication of how the transformer should be properly oriented on the board.  Which side is the primary?  I assumed the right, when you're looking at the layout, but since the test run didn't work I think maybe I'm mistaken.

Forgive me if this is dumb, I've never built stuff with a transformer before.

(BTW, I'm putting the Jawari and the Green Ringer in the same box and calling it the GREEN JAW!)

[inverseroom]

Hmm, just found it on Charlie's site.  I did it right.  Troubleshooting time!

However, once I've got it down, I'll post samples of the two in glorious series.

[Dean Hazelwanter]

Actually, *Primary* should be on the *left* side - towards the input, when using my layout of Tim's circuit, and a 42TM018 transformer.

HTH!

[moosapotamus]

I recall trying the transformer both ways when I built the Jawari and it didn't seem to really make any difference. It's a 1:1 transformer (10K:10K), so why should it, right?

~ Charlie

[inverseroom]

Actually, *Primary* should be on the *left* side - towards the input, when using my layout of Tim's circuit, and a 42TM018 transformer.

HTH!

Hmm...I'm at work, but I'll go home & check it out later.  If Charlie's right, though, why should it make a difference?

[Dean Hazelwanter]

Doh! I just pulled out my PCB and took a look, without actually checking the schematic. :roll:

Charlie's right!

[inverseroom]

OK!     Well, it could be that there was a grounding problem when I tested it, because the whole thing was dangling half-in half-out of the enclosure, and at one point there were actual sparks.  So I'll get it all tucked away happily and try again tomorrow!

[moosapotamus]

...the whole thing was dangling half-in half-out of the enclosure, and at one point there were actual sparks.

Cool!!

Well, uh... that's probably not good tho, huh?  

~ Charlie