Building a Preamp

[Bandersnatch]

Originally posted by ray bronk
Hi Douglas,


You can also call me at 520 444-5514, and we can discuss this from there. Sorry techys, in this game, I am merely a beginner.

Why did you choose a 5Uf cap? What about the 1Uf or 2Uf cap? just curious?

It's been years since I have looked at a power supply circuit. So you will have to get a bit more exacting than that. I almost followed your description.

Would we be making a diode ring/bridge, or how many diodes are we using here.

You will probably have to draw it out on paper, then do the verbal description. Sorry to say, but as a general statement, most sighted people don't know how to verbally describe things very well. Anyhow, you'll be an old pro before long. Thank you very much for your patience and help.

Ray

hey-Hey!!!,
THe 5 uF cap is mostly the results of experimenting. The usual doctrine is to go lower, but when I've used the small motor run types, that worked very well.

On the diodes, we'll use two. One to get forward biased to charge the 'upper' half of the capacitor string and the other getting forward biased to charge the lower half.

I've tried writing instructions, and the task is non-trivial. I agree with your suspicion that this will be a similar task.
cheers,
Douglas

[ray bronk]

Hi douglas,

Ok, those caps are in series, hot to ground hot to ground, and the diodes, cathode to anode cathode to anode. So we have a loop with one end open so the AC can be hooked up there. I'll check your description again.
anyhow, I should be done with church, and lunch and some food shopping and be home by 3 or 4 my time. We are at the present time on the same as PDT. Give me a call then if you wish.

Ray