Heathkit SB200 power supply upgrade boards

[Peter A Markavage]

Mike:
Since Jeff, at Harbach has been selling the same type of item for the
last several years, what differentiates your's from their's. i.e. why
would I choose your product over their product? 

Pete, wa2cwa


On Sun, 17 Sep 2006 13:12:47 -0400 Mike Bryce <prosolar at SSSNET.COM>
writes:
> Well...
> 
> I've been working on a new project, a upgrade power supply for the  
> 
> heathkit sb200 amplifier
> 
> I have the artwork done and will be making a few prototypes in the  
> 
> coming weeks
> 
> PCB will be double sided with plated through holes. Silk screened 
> and  
> solder masked on both sides
> 
> production boards will be .093 thick. prototypes will be .062 
> thick.
> 
> Upgrades include:
> 
> Flameproof resistors, increased from 7W to 10 watts
> DIodes rated at 3 amp at 1000V
> 1% resistors at 5W for metering circuits
> on board voltage divider for high voltage metering (removes the  
> resistors used off board on the original)
> 
> Will accept up to 470mF at 450V caps
> will more than likely use 150mF at 450V for production units.
> 
> It's big board, 7 by 5 inches and looks like a major project to  
> install correctly. Requires a teardown of the amplifier to get to 
> and  
> remove/install the old and new board
> 
> So, that's the poop!
> 
> Anyone interested? If not, perhaps the project will go on the back  
> 
> burner..
> 
> Costs??
> 
> That depends on the final cost of the pcb and the capacitors used.
> 
> right now, I have the Drake L7 upgrade that goes for $100.
> 
> I think the SB200 upgrade will be around that price too. Final price 
>  
> will have to be determined
> 
> so, again... any interest?
> 
> mike...
> 
> 
> Mike, WB8VGE
> SunLight Energy Systems
> The Heathkit Shop
> http://www.theheathkitshop.com/

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