[Heathkit] SB 200 Linear Amp

[Stephen Goldberg]

Harbach electronics (www.harbachelectronics.com) offers their "Soft Start" 
module for $25 for the SB-200.

Steve W4IMF

----- Original Message ----- 
From: "Kenneth G. Gordon" <kgordon2006 at verizon.net>
To: <heathkit at mailman.qth.net>
Sent: Tuesday, November 06, 2007 3:03 PM
Subject: Re: [Heathkit] SB 200 Linear Amp


> >From an article in a GE Ham Tips, the dynamic regulation of power
> supplies for SSB use was discussed. It was suggested that the
> higher the value of filter capacitance in the output of the power
> supply, the better the dynamic regulation.
>
> However, there is, obviously, a limit to how much one dares use,
> since the inrush current can be very high with large capacitors.
>
> I have not yet satisfied myself on the best method of handling
> inrush current to the HV supply.
>
> The OT used to use a time-delay relay of one kind or another to cut
> out a series resistor to the primary, and I favor that method since it
> is pretty fail-safe...generally...
>
> However, I have also been very curious about those solid-state
> inrush current limiters, specifically those made by Ametherm. I
> understand that they run quite hot, however.
>
> So, what might be the consensus here on these issues?
>
> 1) Maximum capacitance in HV supplies
>
> 2) Inrush current limiting.
>
> Ken Gordon W7EKB
> _______________________________________________
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
> $$ See the vintage area on the HCI web site - http://www.w9wze.org $$
> Heathkit mailing list
> Heathkit at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/heathkit
> 



-- 
Certified Virus Free.
Checked by AVG Free Edition. 
Version: 7.5.503 / Virus Database: 269.15.23/1113 - Release Date: 11/6/2007 10:04 AM