Yes if you reached 100% modulation then your PEP = 4x your carrier, the same
for your radio on AM you should limit to 25w if you got a 100w radio.
Without measuring tool you can increase your mic gain until you will see ALC
deflection then to back up for no movement. You should be very close.
With a good peak power meter it will match these numbers and to stay just
under for a good linearity.
Rejean
VA2AM
-----Message d'origine-----
De : Amps [mailto:amps-bounces@contesting.com] De la part de Carl
Envoyé : November 7, 2013 9:20 PM
À : dave@nk7z.net
Cc : amps@contesting.com
Objet : Re: [Amps] AL-82 opinions
And you can also easily run a 400W carrier as an AM linear, a mode that is
getting quite popular again.
Carl
KM1H
----- Original Message -----
From: "David Cole" <dave@nk7z.net>
To: "Carl" <km1h@jeremy.mv.com>
Cc: <amps@contesting.com>
Sent: Thursday, November 07, 2013 9:04 PM
Subject: Re: [Amps] AL-82 opinions
> Carl,
>
> Thank you for the information, I run the amp at 1000 W for any 100% duty
> cycle mode, and 1500 for CW/SSB, if in a contest.
>
> If normal operation, I run the amp at 500 W for 100% duty cycle modes,
> for non contest, and 1500 W for CW during non contest periods... So I
> guess one could say that during contests I up rate the amp on 100% duty
> cycle modes to 1 KW.
>
> Again, THANK YOU for the data here Carl.
>
>
> --
> Thanks and 73's,
> For equipment, and software setups and reviews see:
> www.nk7z.net
> for MixW support see;
> http://groups.yahoo.com/neo/groups/mixw/info
> for Dopplergram information see:
> http://groups.yahoo.com/neo/groups/dopplergram/info
> for MM-SSTV see:
> http://groups.yahoo.com/neo/groups/MM-SSTV/info
>
>
>
> On Thu, 2013-11-07 at 17:59 -0500, Carl wrote:
>>
>>
>> > Hi Carl,
>> > If in fact the Power Supply is the same as other failed Power Supplies,
>> > then you are correct. Maybe it is the de-rating that keeps things
>> > under
>> > control? Any thoughts there?
>>
>> Part of it might be that some hams arent very honest and run those other
>> amps full bore. I wont hazard a guess what percentage of big amp owners
>> they
>> are(-;
>>
>>
>> >
>> > Nice to know the band switch is not just available from Ameritron, and
>> > as I said, it was my fault for the failure... Do you have a part
>> > number
>> > for the band switch and a vendor I can get into my file for the amp.
>>
>> ** The switch is built by Electroswitch and is custom to the amp
>> manufacturer needs. Maybe someone has come up with an interchange list
>> but
>> Ameritron usually has the best price and often it has a wafer that can be
>> swapped to another amp.
>>
>>
>> >
>> > How does it stack up compared to the Heath SB-220?
>> > --
>>
>> Since the SB-220 is only good for 600W (with added fan on xfmr) of heavy
>> RTTY for long term reliability and Id say 1200W for the AL-82, I'll let
>> you
>> be the judge.
>>
>> While I prefer to be on the conservative side I also have the original
>> tubes
>> in several of my own amps (HF to UHF) or run good used tubes. Some of the
>> pricier types are 8122 (2 HF and 1 6M NCL-2000); 8873 (6M SB-230 for
>> portable); 8874 ( 3 in Alpha 76PA); 8875 ( 2 in MLA 2500); 8877
>> (DTR-2000L
>> and HB on 222); 8930 ( FAA amp on 432); 3CX400U7 (A pair of Eimac
>> cavities
>> on 903); and 3CX1000A7 (HB 2M amp).
>>
>> There is also a GL-51064 in a Collins built military cavity I have on 432
>> but I cant run it beyond 1000W which is serious loafing. Feedlines,
>> connectors, and relays have to be upgraded.
>>
>> Carl
>> KM1H
>>
>>
>>
>> > Thanks and 73's,
>> > For equipment, and software setups and reviews see:
>> > www.nk7z.net
>> > for MixW support see;
>> > http://groups.yahoo.com/neo/groups/mixw/info
>> > for Dopplergram information see:
>> > http://groups.yahoo.com/neo/groups/dopplergram/info
>> > for MM-SSTV see:
>> > http://groups.yahoo.com/neo/groups/MM-SSTV/info
>> >
>> >
>> >
>> > On Thu, 2013-11-07 at 10:47 -0500, Carl wrote:
>> >> Since the AL-82 uses the same PS and RF section as the AL-1200, and
>> >> AL-1500
>> >> which are known to have failed for others in a RTTY contest at a full
>> >> 1500W
>> >> I fail to see how the AL-82 is any different. Perhaps there is a
>> >> difference
>> >> between contesting and Contesting.
>> >>
>> >> The AL-82 is also derated above 18 MHz.
>> >>
>> >> The bandswitch is the same as used by Alpha for decades and several
>> >> others;
>> >> it is a survivor when used properly.
>> >>
>> >> OTOH I have had to repair quite a few big Ameritrons used in RTTY
>> >> Contesting
>> >> at a claimed 1500W.
>> >>
>> >> Carl
>> >> KM1H
>> >>
>> >>
>> >> ----- Original Message -----
>> >> From: "David Cole" <dave@nk7z.net>
>> >> To: <amps@contesting.com>
>> >> Sent: Wednesday, November 06, 2013 8:58 PM
>> >> Subject: Re: [Amps] AL-82 opinions
>> >>
>> >>
>> >> > Hi,
>> >> >
>> >> > Having owned an SB-220, and an AL-82, I would take the 82 any day...
>> >> >
>> >> > Here is why:
>> >> >
>> >> > Good Points:
>> >> >
>> >> > 1. Solid as a rock
>> >> >
>> >> > 2. Full output on all bands, RTTY contesting
>> >> >
>> >> > 3. Will do 10 Meters
>> >> >
>> >> > 4. Easy to tune
>> >> >
>> >> > 5. So far-- good on tubes
>> >> >
>> >> > Bad Points:
>> >> >
>> >> > 1. You should run it on 220, (Not really that bad, all decent
>> >> > amps should be)
>> >> >
>> >> > 2. The band switch is a bit light... If you move it while
>> >> > transmitting, you replace it. I did not do this on a 220
>> >> > so I don't know how the 220 would react, probably the same
>> >> > way.
>> >> >
>> >> > 3. Heavy as heck
>> >> >
>> >> > 4. Noisy, but it moves a LOT of air across the tubes.
>> >> >
>> >> > 5. Replacement of the band switch is a real pain in the rear...
>> >> >
>> >> > Overall feelings towards the amp:
>> >> > Very simple to use, easy tune up, solid as a rock. I have used it
>> >> > in
>> >> > Contest RTTY, and all it does is get warm... Runs fine... Beyond
>> >> > the
>> >> > bandwidth switch issue, (which I caused), it has had zero issues for
>> >> > the
>> >> > past 5 years of RTTY contesting. It runs WAY cooler than a Heath
>> >> > 220
>> >> > does in an RTTY contest. Better air flow, the 82 used a pair of
>> >> > chimneys, while the 220 I had did not have any.
>> >> >
>> >> > I would buy it again over a Heath any time, any day....
>> >> >
>> >> > --
>> >> > Thanks and 73's,
>> >> > For equipment, and software setups and reviews see:
>> >> > www.nk7z.net
>> >> > for MixW support see;
>> >> > http://groups.yahoo.com/neo/groups/mixw/info
>> >> > for Dopplergram information see:
>> >> > http://groups.yahoo.com/neo/groups/dopplergram/info
>> >> > for MM-SSTV see:
>> >> > http://groups.yahoo.com/neo/groups/MM-SSTV/info
>> >> >
>> >> >
>> >> >
>> >> >
>> >> > On Wed, 2013-11-06 at 16:11 -0500, Pete Smith N4ZR wrote:
>> >> >> I'm pondering purchase of a (probably used) AL-82. My current
>> >> >> amplifier
>> >> >> is an SB-220, which I use like an active antenna tuner, and which
>> >> >> delivers 950-1300 watts 10-80 meters.. Where my K3 will fold back
>> >> >> at
>> >> >> just over 2:1 SWR, the SB-220 cheerfully drives an 80M array tuned
>> >> >> for
>> >> >> the CW end, up into 3800-3900. Even though the reported SWR is
>> >> >> over
>> >> >> 3:1, so long as the loading control can find an output peak, I just
>> >> >> go.
>> >> >>
>> >> >> My principal reason for going to the AL-82 would be to get 160M,
>> >> >> but I
>> >> >> don't want to do it if I would be trading my SB-220 for a touchy
>> >> >> monster. A couple of questions:
>> >> >>
>> >> >> Is the power supply adequate for 1500W CW in contest service?
>> >> >> Is the output circuit reasonably forgiving, compared to my SB-220?
>> >> >> Any other significant concerns, aside from the brute weight?
>> >> >>
>> >> >>
>> >> >> 73, Pete N4ZR
>> >> >> Check out the Reverse Beacon Network
>> >> >> at http://reversebeacon.net,
>> >> >> blog at reversebeacon.blogspot.com.
>> >> >> For spots, please go to your favorite
>> >> >> ARC V6 or VE7CC DX cluster node.
>> >> >> _______________________________________________
>> >> >> Amps mailing list
>> >> >> Amps@contesting.com
>> >> >> http://lists.contesting.com/mailman/listinfo/amps
>> >> >
>> >> > _______________________________________________
>> >> > Amps mailing list
>> >> > Amps@contesting.com
>> >> > http://lists.contesting.com/mailman/listinfo/amps
>> >> >
>> >> >
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>> >> > 11/07/13
>> >> >
>> >>
>> >
>> >
>> >
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>>
>
>
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