As far I remember IMD3 measured -26dB at ARRL lab.
73
Peter
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Jim Thomson
Sent: Donnerstag, 3. Dezember 2015 13:51
To: Jim W7RY; amps@contesting.com
Subject: Re: [Amps] Ameritron ALS 500M
### I stand corrected. It appears it consists of 2 x 100w modules, with
a splitter and combiner.
As per usual, kenwood doesn't even mention TX IMD...on their spec sheet.
http://www.kenwood.com/i/products/info/amateur/ts_480/
Jim VE7RF
-----Original Message-----
From: Jim W7RY
Sent: Thursday, December 03, 2015 12:11 AM
To: Jim Thomson ; amps@contesting.com
Subject: Re: [Amps] Ameritron ALS 500M
Jim....Better look at the Kenwood TS-480H. 200 watts, 12 volts.
73
Jim W7RY
-----Original Message-----
From: Jim Thomson
Sent: Saturday, November 28, 2015 4:43 PM
To: amps@contesting.com
Subject: [Amps] Ameritron ALS 500M
Date: Tue, 24 Nov 2015 11:09:33 -0500
From: "Mike Feher" <n4fs@eozinc.com>
To: "'Al Kozakiewicz'" <akozak@hourglass.com>, <amps@contesting.com>
Subject: Re: [Amps] Ameritron ALS 500M
Al -
Interesting comment. It will be easy enough to measure the two tone IMD as a
function of voltage. I assume the higher order ones will not matter as they
should be pretty far down, but, possibly the first and 2nd order may be
worth a look. It is interesting that almost all HF radios in the 100 to 200
watt class are solid state running off of 12 volts. I know in those the 12
volts is not regulated or preset to any specific value. In fact, I also have
a Kenwood TR-450SAT with matching PS-30 power supply. That is about the
worst supply I have ever seen as far as regulation goes. I would think your
comment would apply to all those rigs as well. 73 - Mike
Mike B. Feher, N4FS
## don't count on it. it's the higher order IMD that causes all the
splatter
problems, like the IMD 7-19. The ALS-500 is a mobile amp. The premise
is, in a mobile setup, signals are not going to be loud anyway, with typ
mobile
vert antennas........ vs a yagi on a tower.
## There is no 200 watt xcvrs that run on 12 vdc. They are all 30 vdc or
50 vdc.
Jim VE7RF
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