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
> >> >
> >> >
> >> > -----
> >> > No virus found in this message.
> >> > Checked by AVG - www.avg.com
> >> > Version: 10.0.1432 / Virus Database: 3222/6316 - Release Date: 11/07/13
> >> >
> >>
> >
> >
> >
> > -----
> > No virus found in this message.
> > Checked by AVG - www.avg.com
> > Version: 10.0.1432 / Virus Database: 3222/6316 - Release Date: 11/07/13
> >
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|