[Amps] LK550-ZC

[jeremy-ca]

The complete Amp Supply product line was an ever evolving beast. A late A 
model may have had some B circuitry, A  B had some C and a C had several 
production changes.
On top of that changes were made on amps returned for service.

I was a dealer for several years and it was always fun figuring out what 
Denny would do next. I still service them and had a B panel with mostly C 
internals in here a few weeks ago.

Carl
KM1H




----- Original Message ----- 
From: <Gudguyham at aol.com>
To: <hphillips at mho.com>; <Amps at contesting.com>
Sent: Monday, October 29, 2007 12:42 AM
Subject: Re: [Amps] LK550-ZC


>
> In a message dated 10/28/2007 10:48:30 P.M. Eastern Daylight Time,
> hphillips at mho.com writes:
>
> Can  someone tell me what the difference is between the LK550-ZA or
> LK550-ZB to  the LK550-ZC?
>
> Thanks,
> K7XM
> Hugh
>
>
>
> Usually the difference was ZA was a straight amplifier with no protection
> circuits like an Sb-220.  The ZB had some protection circuits like High 
> plate
> current shut down, the ZC had several more protection circuits, Like High 
> SWR
> shut down, high grid current shut down.  Other than that they are  pretty 
> much
> the same.  At least that was so with the LK-500  series.   Lou
>
>
>
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