[NJARC] Battery eliminator idea

[Al Klase]

Steve,

If I had the room, I'd use two 6.3 volt transformers back-to-back, and 
reduce the shock hazard.

Consider using an LM317 regulator to keep the A supply where you want 
it, and zener diodes to control at least the C supply.

I assume you meant uF where you said pF.  What's three zero's among friends?

Al

On 3/17/2013 8:01 AM, sgt88 at atlanticbb.net wrote:
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> I'd like to make/put one into the radio case.
>
> 1.  use the 115VAC in a transformerless rectifier ( IC package ) + 
> 500Pf cap with B & C voltage divider;
> 2.  use a 5 or 6.3 volt filiment xmfr with rectifier ( IC package ) + 
> 500Pf cap for the A.
>
> Seems like it'd be cheap and small...
>
> Comments please,
> Steve T.
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-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/