[Elecraft] need help with smart charger

Thu May 22 15:44:00 2003

Somewhere in the grage I have my copy.. If you need it let me know and 
I'll spend the weekend looking for it.

-Denis

On Thu, 22 May 2003, Don Wilhelm wrote:

> Leon,
> I don't have the schematic for the actual A&A SmartCharger handy, but I
> opened my unit and found that the installed value of C2 is 0.47 uF (474).  I
> don't believe the value is critical because I checked the schematic for "A
> Gelled-Electrolyte Battery Charger" in my 1994 ARRL Handbook and found the
> value shown there to be 0.22 uF at 35 volts.  This project appeared in
> several handbooks in that time period and is based on an article by Warren
> Dion, N1BBH that appeared in the June 1987 issue of QST - this design is the
> basis for the A&A Engineering SmartCharger, so you can use the QST//Handbook
> resource for immediate information, and I am fairly certain that you could
> obtain the full set of instructions from A&A Engineering.
> 
> A & A Engineering
> 2521 W. LaPalma, Unit K
> Anaheim, CA 92801 USA
> Ph (714) 952-2114 Fax: (714) 952-3280
> E-mail: [email protected]
> 
> The A & A Engineering website is at:  http://www.a-aengineering.com/
> 
> 73,
> Don W3FPR
> 
> ----- Original Message -----
> 
> Helklo --I bought an A and A smart charger at a swap meet and need a
> Schematic to fix it or at least need to know what value C2 fiom pin 14 to
> grnd is.
> 
> Appreciate any help
> 
> 
> 
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