I have mixed opinions on that amp Val.
Too much glass in a small space with poor air flow
Can get squirrely on 10/15M as it gets a bit out of neutralization.
The cover seriously detunes it; many have had an aluminum cover made.
It will do an easy 1500W with 100W drive and its pretty happy there. Its
when you run 150-200W drive that it acts up.
$700 was still a bargain, that power pack alone can bring half that. I bet
it could bring $2K on Fleabay now.
Carl
KM1H
----- Original Message -----
From: "Val Erwin" <valerwin@att.net>
To: <km1h@jeremy.mv.com>
Cc: <amps@contesting.com>
Sent: Friday, January 29, 2010 3:48 PM
Subject: Re: [Amps] Good amp to buy
Howdy Carl:
Since you seem to be a mover and shaker in the amp repair world and a
quasi-Amp Supply affectionado, I would like your opion on the
LK-550...........da' one with 3 X 3-500's and floor power supply with the
Dahl plate XFMR.
I had a chance to pickup one for $700 about two years ago and have kicked
myself for passing it up...........The only downside that I was aware of was
that it took >100 watts to drive it QRO........Go ahead Carl, make me feel
even worse for passing it up!......ha ha
Regards,
Val Erwin
W5PUT
--- On Fri, 1/29/10, Carl <km1h@jeremy.mv.com> wrote:
From: Carl <km1h@jeremy.mv.com>
Subject: Re: [Amps] Good amp to buy
To: "Randall, Randy" <Randy.Randall@healthall.com>
Cc: amps@contesting.com
Date: Friday, January 29, 2010, 8:26 PM
The LK-500ZC was the last model and the best. I bought mine new in 86 and
still use it with the only problem being the (optional) vacuum relay and
that includes many years of intense contesting and DXing using VOX CW and
SSB.
I probably should change the filter caps as simple PM.
Carl
KM1H
----- Original Message -----
From: "Randall, Randy" <Randy.Randall@healthall.com>
Cc: <amps@contesting.com>
Sent: Friday, January 29, 2010 2:57 PM
Subject: Re: [Amps] Good amp to buy
> Carl,
>
> What is your opinion on the Amp Supply LK-500's.
>
> Randy AB9GO
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of Carl
> Sent: Friday, January 29, 2010 2:41 PM
> To: Bill K2OWR; Lee Buller
> Cc: amps@contesting.com
> Subject: Re: [Amps] Good amp to buy
>
> You may be surprised to know that the AL-82 uses the same capacitor vendor
> with the same plate spacings as the SB-220. It uses the same bandswitch
> construction as several Dentrons. Generic Modutec meters. A minimum
> strength
> formed base and cover, decent cooling and PS. No special high quality
> anywhere, just built to compete at a price. At $700 less than an AL-1200
> it
> doesnt take many problems to make that amp seem like a bargain. Some are
> lucky with the -82; there are also thousands of SB-220's that have never
> had
> a failure and are still on original tubes; I get them in here all the time
> to convert to 6M.
>
> When I was selling Ameritron in their independent days the AL-1200 outsold
> the -82 by far. The best selling 2 x 3-500Z amp was the Amp Supply LK-500
> series....I sold those also.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Bill K2OWR" <k2owr@comcast.net>
> To: "Lee Buller" <k0wa@swbell.net>
> Cc: <amps@contesting.com>
> Sent: Friday, January 29, 2010 2:18 PM
> Subject: Re: [Amps] Good amp to buy
>
>
>> :::: Thanks for understanding Lee.
>>
>> I have never heard anyone say that the AL82 was prone to failure, or that
>> the components were delicate or hard to find. In my opinion an amp like
>> this, bult like a battleship, if run even a little conservatively, will
>> serve one for many more years, without failure than amps like the SB220,
>> TL922, or the others, all of which are underdesigned with components
>> stressed close to their limits.
>>
>> BTW, none of those are made any longer, nor have they been for many
>> years.
>> My AL82 is 20 years old now and I expect will likely outlive me.
>>
>> Oh, and if you're a contester and can't fix your own amp, stick to the
>> 811,
>> or 572B type amps....all solid designs!
>>
>> BILL K2OWR.....I'm gonna pay for my words, I know:-(
>>
>>
>>
>>> Bill
>>>
>>> I too like the AL-82 and have not trouble with mine. But, I run mine in
>>> conservative mode and not full throttle. Nice amp, but like all amps
>>> they
>>> need to be tuned properly. The QRO-2000 is a nice amp too, but I don't
>>> think he makes many of them anymore.
>>>
>>> I do like the 3-500Z bottles for cost.
>>>
>>> Lee - K0WA
>>>
>>> In our day and age it seems that Common Sense is in short supply. If
>>> you
>>> don't have any Common Sense - get some Common Sense and use it. If you
>>> can't find any Common Sense, ask for help from somebody who has some
>>> Common Sense. Is Common Sense divine?
>>>
>>> Common Sense is the image of the Creator expressing revealed truth in my
>>> mind. - J. Wolf
>>>
>>>
>>>
>>>
>>>> "... I'd like to weigh in on this.....
>>> The Ameritron AL82 seems to me to be the most rugged and powerful
>>> amplifier
>>> in the twin 3-500Z class.
>>> The power supply alone makes all the others seem puny and the output is
>>> higher than all others in this class.
>>> They can be had for as little as $1200 used and are truly a contesters
>>> dream
>>> amplifier.
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>
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