[Heathkit] Soft-Start circuit for SB-1000

[Carl]

Sounds like a good amp for contests...............




----- Original Message ----- 
From: "Bill Kuhn" <BKuhn at kuhngroup.com>
To: <heathkit at mailman.qth.net>
Sent: Sunday, November 29, 2009 10:28 AM
Subject: [Heathkit] Soft-Start circuit for SB-1000


> I've finally started work on cleaning up an SB-1000 I purchased from an
> estate last spring.
> 
> 
> 
> The amp had a couple of home-made modifications - one I'm pretty sure is
> a soft-start circuit and the other is ??? maybe a QSK circuit?? What
> appears to be a soft-start module looks to be fairly well constructed,
> but it is a breadboard so I'm assuming it is homemade. The other circuit
> looks like a child got loose with a soldering iron, and has 2 dangling
> leads that go nowhere. Because of that, I haven't even tried to power it
> on. I think this also has a 10 meter mod.
> 
> 
> 
> My strategy is to pull out anything that doesn't match the
> manual/illustrations/schematic and bring this back to a base SB-1000 and
> see if it works. If the board that appears to be a soft-start is in fact
> usable, I guess I should leave it. The other circuit is out.
> 
> 
> 
> To my question (finally)..
> 
> 
> 
> Is there a good schematic available of what a soft-start circuit should
> be and how it should be connected in an SB-1000? I'd like to verify what
> I have.
> 
> 
> 
> Thanks!
> 
> 
> 
> 73 DE NO0OO
> 
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