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?
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.
How does it stack up compared to the Heath SB-220?
--
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
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> >
> >
> > -----
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>
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