[NJARC] Battery eliminator idea

[Mike Feher]

Whoops - 3 more zero's Al for a total of 6. 73 - Mike 
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 


-----Original Message-----
From: njarc-bounces at mailman.qth.net [mailto:njarc-bounces at mailman.qth.net]
On Behalf Of Al Klase
Sent: Sunday, March 17, 2013 11:10 AM
To: njarc at mailman.qth.net
Subject: Re: [NJARC] Battery eliminator idea

Just remember
Reply = Poster
Reply All = Everyone

_________________________________________________________
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:
> Just remember
> Reply = Poster
> Reply All = Everyone
>
> _________________________________________________________
> 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/

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