[Amps] SB-230 Amp Retrofit

[Rob Frohne]

Hi Harry,

I have an SB-230 modified by Bob Friess to use an 8560AS.  These tubes
go for around $50 each new, and it will put out 500 watts with 10 watts
drive.  Bob lost a lot of the design data when his hard drive crashed.
I plan to reverse engineer it and put the details on the web.  He did a
really nice job.

73,

Rob, KL7NA


On Fri, 2007-10-12 at 13:54 -0400, Harry Brown wrote:
> I got a SB-230 Amp at a local hamfest with a bad 8873.
> 
> I'd like to replace the 8873 with something affordable. Can someone point me to a conversion article on the 230 that uses an air cooled tube? 
> 
> 73, Harry, W3IIT
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