that is completely unpardonable. unless you took a lightning strike, it is obvious that the amp was a lemon, as any amp worth owning should protect itself no matter what you do., even transmitting into an open or shorted coax should do nothing more than she the amplifier down, and I wouldn’t own anything that was so weak and unreliable. This is an area that I imagine tube finals still beat solid state hands down, although having never owned an amp, and likely never to own one, i wouldn’t know.
On Dec 5, 2013, at 2:51 PM, Alan R. Downing <[log in to unmask]> wrote:

> I have had an ALS600 for about a year, but it was mostly a backup amp.
> During the year that I had it, it got very little use.  About a month ago, I
> discovered that it had lost all output.  Until it went south, it would put
> out about 550 watts.  It turned out that I had blown the finals, which was
> somewhat surprising to me as it was feeding an antenna that had a SWR of
> less than 1.1 to 1.  The repair bill came to about $400 not including
> shipping.
> 
> Since I knew that the amp had never been abused, I decided that I didn't
> want it around anymore so I sold it for $700.  My experience with it leads
> me to believe that it was too finicky, not suitable for even a backup.
> 
> If you have any further questions, just drop me a private email.  My email
> address is good on qrz.com
> 
> 
> Best 73
> 
> 
> 
> Alan R. Downing
> Phoenix, AZ
> 
> 
> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Fred Adams
> Sent: Thursday, December 05, 2013 11:58 AM
> To: [log in to unmask]
> Subject: Ameritron ALS-600 amplifier
> 
> I believe some of you guys are using or have used the ALS-600 amplifier and
> I would appreciate any info you could give me on it.  I have heard that it
> shuts down with the slightest SWR, is this correct?  Also, about what how
> much power does it put out.  I will appreciate any info good or bad as I
> may be interested in one.  Also price estimate new and used if you know.
> Can the top section set on top of the power supply and is it very blind
> user friendly?   Thanks much for any info.