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Re: [Amps] QEX article for medium voltage MOSFET linear amplifierlink

To: amps@contesting.com
Subject: Re: [Amps] QEX article for medium voltage MOSFET linear amplifierlink
From: Steve Thompson <g8gsq@eltac.co.uk>
Date: Sun, 13 Aug 2006 16:33:18 +0100
List-post: <mailto:amps@contesting.com>

mike kendall wrote:
> Hello all,
>     I already had some schematics and .PDF for this item before the article 
> came out but here goes.
>     OK, I haven't even finished reading it yet but this is the article that 
> everyone has been waiting to come out.  It is a 1.5KW linear using two MOSFET 
> devices from MICROSEMI (formerly APT).  The ONLY problem I can find with this 
> unit is long wait times for the MOSFET devices (I've been quoted 3-4 month 
> lead time from some of MICROSEMI's vendors that are willing to stock it) and 
> they are pricey at over $200each.
>     I have been working on all the piece parts for over a month and have 
> actually found another company making medium voltage devices suitable for 
> broadband HF applications.  I may be going with the other company as they are 
> not giving me the long lead time run around and their components are 
> noticeably cheaper and have the same voltage requirement of 100volts on the 
> Vdd.
>     I think that MICROSEMI would sell alot of these devices if they would be 
> willing to take the approach that GIGAVAC does with their vacuum relays.  
> With GIGAVAC, if you are a ham and use a credit card that has the same 
> billing name as the amateur radio operator callsign you may purchase a 
> limited amount of devices (5) per year.  MICROSEMI formerly did not want to 
> deal this way and I am well into building a linear with no "engine" or RF 
> components.  This is what got me looking for the alternative source and I 
> have found one.
Can you tell us who the other company is?

Steve
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