[NLRS] Re: W4RRY battery booster

[Chris Elmquist]

Hi John,

Thanks for the details.  Here's the datasheet for that part:

http://focus.ti.com/docs/prod/folders/print/sg2524.html

It's a fairly old design (circa 1977) so I suppose he might have used
bipolar pass transistors rather than FETs but can't knock it if it works.

I'd appreciate more info when you get the chance but no hurry on my
account.

Chris NØJCF

On Tuesday (01/31/2006 at 10:52PM -0600), John (JK) Kalenowsky, K9JK wrote:
> Not sure if this will got to the reflector due to some issues with this
> ISP using a server that is on a "bad server" list (sorbs.net) from which
> qth.net will not accept/forward submissions so doing a "Reply All".
> 
> I've looked "under the hood" of the one that I have (23 A rated version)
> and the "switching controller" is actually an SG2524 (interesting that 
> he used the "extended commercial temp range", -40 to +85 degrees C, 
> version instead of the SG3524 which is only rated to cover 0 to +70 
> degrees C). I do not recall the other pass/switch devices and am not at 
> home to be able to peek at present. The inductors/transformers looked to 
> be hand wound and were on toroidal cores.
> 
> I can do some more looking (maybe even take a picture), if anyone is 
> interested in further detail.
> 
> 73, JK

-- 
Chris Elmquist
mailto:chrise at pobox.com
http://www.pobox.com/~chrise