[Milsurplus] 220 MHz ham band AM usage?

[D C Macdonald]

Maybe I'm mistaken, but I believe that it is no longer
legal to run 1 kW AM.  At 100% modulation peaks,
the PEP input would be 4 kW.  Assuming even as
low as 50% efficiency, peak output would be 2 kW.
Assuming a reasonable 65% efficiency, you'd end up
with 2.6 kW peak output.  Allowable PEP output for
any mode under the current rules is 1.5 kW, right??

Has the original W2OY been resurrected?  Reminds me
of 3804 kHz back in the 50s and 60s in western NY!

("I bought the crystal in 1937, so the frequency is mine!")

73  ---  Mac, K2GKK/5



----Original Message Follows----
From: "James M. Walker" <chejmw at acsu.buffalo.edu>
To: "David Ross" <ross at hypertools.com>, <flood at Krohne.com>
CC: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] 220 MHz ham band AM usage?
Date: Fri, 21 May 2004 10:59:39 -0400

Well John,
That seems to be the general rule now-a-days.  What with
the shirt pocket radio stations on repeaters and such, they
only care if you are going to possibly cause trouble for their
repeater frequencies.  Never once remembering repeaters
are in fact allowed by gentlemen's agreement, and also that
the rule states that repeaters can't interfere with ongoing
communications.  Everyone seems to have forgotten the
listen before you transmit rule.

I am on 6 meter AM, 1 KW input, also 2 meter AM 1 KW
input, and more recently 220 AM also at, you guessed it,
1 KW input.  All with steerable antennas that exhibit some
gain.  If I get complaints from a repeater, I first gently refer
them to the rules and regs section for amateur operation
on these frequencies.  If they want to be a pain, then I
ignore them.  If you point your antennas towards Buffalo,
I am sure the folks between here and where you are will
answer you.

Jim
WB2FCN



----- Original Message -----
From: <flood at Krohne.com>To: "David Ross" <ross at hypertools.com>
Cc: <milsurplus at mailman.qth.net>
Sent: Friday, May 21, 2004 10:25 AM
Subject: Re: [Milsurplus] 220 MHz ham band AM usage?

 > Hi to all,
 >
 > Ah ha!  Now I don't feel so bad.  I asked the same question of the local
 > 220 spectrum management guy.  Answer....  First silence, I expect he was
 > looking around for the hidden camera. Then he asks "Who is this again?" I
 > figure he is trying to recognize the voice, still sure that someone is
 > playing a trick on him.  Next he attempts, unsuccessfully, to hold back
 > laughter and makes a comment something along the line of  'you must be 
one
 > of those guys that's on 6 and 2 AM!'  At this point I'm thinking  "Great,
 > now this is on my permanent record."  He tells me that, (and I'm sure he
is
 > still looking for that camera) "Well I'm sure that you won't be using it
 > very often so  it's OK to go where ever we want but just don't cause
 > problems for the local repeaters.  He wasn't rude at all and I glad that 
I
 > was able to make him smile.
 >
 > John Flood  KB1FQG
 > TASC Department
 > KROHNE, Inc
 > 7 Dearborn Rd.
 > Peabody, MA   01960
 > Tel.:  978-535-6060 / 800-356-9464
 > Fax:   978-535-8180