[Milsurplus] 220 MHz ham band AM usage?

[James M. Walker]

No I don't think you are mistaken Mac! The equipment was mil-Surplus,
with a sprinkle of old FAA equipment thrown in. All of my Stuff on 2 meters
and 220 Mhz runs a Pair of 4CX250Bs modulated by a pair. On 6 meters
I run a pair of 4-125As modulated by a pair. Also while the Shared high
voltage
power supply, runs 5 KV @ 500 MA I have never had to run it up. The 4CX250B
only needs 2 KV, and the max on the 4-125s is 3 KV, and yes I try to be
gentle
with the tubes, what with prices and all. However it pays to be prepared for
QRM
and such.
Jim
WB2FCN

----- Original Message -----
From: "D C Macdonald" <k2gkk at hotmail.com>
To: <chejmw at acsu.buffalo.edu>; <ross at hypertools.com>; <flood at Krohne.com>
Cc: <milsurplus at mailman.qth.net>
Sent: Friday, May 21, 2004 11:19 AM
Subject: Re: [Milsurplus] 220 MHz ham band AM usage?


> 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
>
>
>