Well it's all buttoned up and working, thanks for all the help ! Like I said, I knew the previous owner had done surgery on it, just not aware that included the can which he also replaced.
So just made for a confusing time. To add insult to injury, when I got that last 100uF section wired up, I was getting good calibrator signal, but no signals on the bands. Then I looked over and saw I'd disconnected the antenna yesterday because of T-storms :) So it's working nicely, y'all go out and HayseedHamfest your caps ! Chuck, K1OM On Sun, Jul 25, 2010 at 2:59 PM, Richard Knoppow <1oldle...@ix.netcom.com> wrote: > > ----- Original Message ----- From: "Chuck Grandgent" <ch...@chuckg.com> > To: "Richard Knoppow" <1oldle...@ix.netcom.com> > Cc: <drakelist@zerobeat.net> > Sent: Sunday, July 25, 2010 11:34 AM > Subject: Re: [Drakelist] R4B question about R91 > > > Thanks Richard, Garey, > > Much of my confusion has been caused because the previous owner had > done surgery to it, so instead of a can with C90 B,C,D 100uF (plus > C90A 29uF), the can that was installed only had two 100uF sections, > then they'd tucked another 100uF can under the chassis. As well, the > triangle square etc markings on the bottom of the can didn't match the > one I got from Hayseed which I did notice right away, but added to the > confusion, as I was going on the assumption the can on the chassis was > the original. That also led to confusion about he resistor that was > on the bottom of the can. > > I do have Garey's guide and agree to its utility ! > > I think I've just about got it. > Tested it on low voltage first - with all major power supply > maintenance I do, instead of just hitting it with the 110, I first hit > it with 12VAC from a filament transformer and take quick voltage > readings. I find it's less exciting that way :) > Next hit it with the full voltage and it almost works, get calibrator > signal etc., just have to account for that third 100uF section that's > not wired up yet. > > Chuck, K1OM > > C-90D is at the B+ end of the primary of the audio output transformer. > R-43, a 330 ohm resistor, goes between it and the junction of D4 and D5 > (power supply rectifiers). Filtering and decoupling for the power amp. Also > in the upper right corner of the schematic near the transformer. > > > -- > Richard Knoppow > Los Angeles > WB6KBL > dickb...@ix.netcom.com > _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
