[TenTec] Pegasus and Heathkit SB220 amp

[Paul Christensen, Esq.]

I just found it...it's called the AmpKeyer and it's $39.95 from "The
HeathKitShop."

If you don't mind performing a very minor mod to your SB-220, the Harbach
solution is the best and it's half the cost of the AmpKeyer....here info on
the AmpKeyer....

http://www.theheathkitshop.com/ampkeyer.html

-Paul, W9AC

----- Original Message -----
From: "Paul Christensen, Esq." <w9ac at arrl.net>
To: <tentec at contesting.com>
Sent: Tuesday, February 25, 2003 21:21 PM
Subject: Re: [TenTec] Pegasus and Heathkit SB220 amp


> Although Ten-Tec specs the key line voltage at low DC voltage for warranty
> purposes, the TO-220 style keying transistor in the Pegasus is actually
> speced to handle well over 100VDC, but I don't recall if it's rated to 170
> V.  My Pegasus keys my ALPHA SEVENTY amplifier with a 70V key line and I
> have no trouble.
>
> Harbach engineering sells the most elegant solution for your SB-220.  From
> the Harbach web page at:
>
> http://www.harbachelectronics.com/reference/harpg3cart.htm
>
> "SK-220 SOFT-KEY MODULE - The SK-220 is an interface module which allows
> your transceiver to key the SB-220 seeing only 0.7 volts at 1.5 mA. The
> original SB-220 circuit had +120 volts on the keying line. This easily
> installed unit is only $20.00 with $1.20 sales tax for Indiana residents."
>
> Another solution is to build or purchase an external interface unit with a
> HV Darlington switching transistor.  Someone just recently came out with a
> nice, opto-isolating all-in-one amplifier interface and I just can't
recall
> who it is.  Perhaps someone can chime in and help me with my memory.
>
> -Paul, W9AC
>
>
>
> ----- Original Message -----
> From: "Wayne" <aa5jj1 at cox.net>
> To: <tentec at contesting.com>
> Sent: Tuesday, February 25, 2003 21:06 PM
> Subject: [TenTec] Pegasus and Heathkit SB220 amp
>
>
> I have a Heathkit SB220 2KW PEP amp and I have been using it on a Kenwood
> with a external keying relay to protect the rig form the 170 volts that
> comes out of the keying realy in the SB220, The Pegasus can not us this
and
> I am not sure how to use the Pegasus with my SB220 amp......Please Help
>
> Thanks Wayne AA5JJ
>
>
>
>
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