[Icom] PW1 ?

Thu, 26 Jun 2003 17:00:55 -0400

Yeah,
I have been waiting for Adam to send me the latest results on the
distortion figures of solid state devices as used in the 781 at low
output levels.
--Adam stop petting the new dog and start working on those numbers--
Bruce

-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of [email protected]
Sent: Thursday, June 26, 2003 4:17 PM
To: [email protected]
Subject: Re: [Icom] PW1 ?

Bruce-

Thanks for the very valuable information on the Acom. I had thought the
Alpha 87A had been around a long time and the Acom sure looks similar in
execution. And I know you would never run 2,000 watts :-)

Now if we could just get you out of that old technology 781 ( I had one
)
and into a 756 Pro II, you could really utilize the potential of that
amp!
:-) Bet Adam Farson has some good thoughts on the quality of the signal
put
out by a 756 Pro II at 12 watts.

Andy K5VM

----- Original Message -----
From: "Bruce Marton" <[email protected]>
To: <[email protected]>
Sent: Thursday, June 26, 2003 1:14 PM
Subject: RE: [Icom] PW1 ?

| Andy,
| The Acom is not based on the Alpha.  It's really the other way around.
| Acom was producing a stripped down version of their amp and putting
| Alpha's name on it.  Since Alpha is not really in the business like
they
| were, Acom moved on to build their own amp as they see fit to make it,
| and hence the Acom's of today.  They are not Alpha's, they are better
| than Alpha's, at least that's what I keep hearing.
| As far as service is concerned, you send the amp to Acom in Boston, MA
| for service.  That's where I picked up my new amp and had the pleasure
| of spending most of a Saturday with Krassy himself, who fully
| demonstrated the amp and all of it's internal workings to me in
person.
| Not to mention we set up the 10/12 meter operation while the amp was
| open.  The amp is fully computer controlled, can be diagnosed remotely
| via an internet link from the amp if you ever have any troubles, and
can
| be upgraded as such.
|
| As far as distortion goes, the solid state devices appear to just make
| the grade in passing FCC minimum requirements, so there is no danger
of
| running illegally, but the tubes run much beyond the minimum
| requirements, hence much cleaner and I like to have things run without
| heavy breathing myself.
| Just like the output levels.  I can run the Acom with about 40 watts
of
| drive and do an easy 1500 watts.  The tubes aren't even hot.  The amp
| can do well over 2kw with less than normal full output from an
exciter,
| say about 70 watts.  I usually run my amp with about 12 watts of drive
| or so, this gives me about 500+ watts out and everything is very cool.
| Now the question is what is the distortion from the exciter (solid
state
| 781), with 12 watts of output.  I have been told they lower output
| levels from the ratings lead to higher distortion in solid state
| devices??
|
| Bruce

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