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Re: [Amps] Good amp to buy maybe build?

To: <amps@contesting.com>
Subject: Re: [Amps] Good amp to buy maybe build?
From: "Barrie Smith" <barrie@centric.net>
Date: Fri, 29 Jan 2010 14:31:08 -0700
List-post: <amps@contesting.com">mailto:amps@contesting.com>
Scan the bare front panel and have a graphics shop print whatever you want 
on vinyl.

You can have any color background and any color text.

With the vinyl and inks in use now the product would last ten years 
OUTDOORS!  This is what is used for vehicle signs and wraps.

I own a graphics shop and have done a couple of front panels for others. 
They look great.  You can't tell that they are not painted.

I'm in the process of building a rather large transmitter at the moment.  I 
plan on using the vinyl on that.

73, Barrie, W7ALW


----- Original Message ----- 
From: "ZL2AAA" <zl2aaa@paradise.net.nz>
To: "Fuqua, Bill L" <wlfuqu00@uky.edu>; <amps@contesting.com>
Sent: Friday, January 29, 2010 2:00 PM
Subject: Re: [Amps] Good amp to buy maybe build?


> The biggest problem that I find is getting suitable ,good looking decals 
> for
> the front panel.Silk screening for a one off project is not
> economical.Letraset nah.I would like to know what other constructors use?
>
>
> ----- Original Message ----- 
> From: "Fuqua, Bill L" <wlfuqu00@uky.edu>
> To: <amps@contesting.com>
> Sent: Saturday, January 30, 2010 9:09 AM
> Subject: Re: [Amps] Good amp to buy maybe build?
>
>
>> It occurred to me that it is too bad that some ham with a metal shop does
>> not offer a sort of "generic" box for hams who wish to build amplifiers.
>> Maybe it would be a big box.  Perhaps a big hole for a 4-1000A or 3-1000Z
>> or a hole that a plate can cover to accommodate various sockets. I 
>> suspect
>> that there are  hams out there that will pay the $ but just don't have 
>> the
>> time and/or skills to deal with the sheet metal. Part of the problem with
>> hams as with most people is getting started on a big project. Having this
>> frame work to put parts into as you get them could help and get more
>> people (hams) interested in building amplifiers. I see a down side with
>> most of us getting older. And that is that perhaps builders are getting
>> completed or near completed projects from estate sales and ebay. This
>> perhaps competes with such a venture.
>>   I have seen some offerings for parts for UHF amplifiers. But those
>> projects are much more specific and require much machine work.
>>
>> 73
>> Bill wa4lav
>>
>> ________________________________________
>> From: amps-bounces@contesting.com [amps-bounces@contesting.com] On Behalf
>> Of Phil LaMarche [plamarc1@verizon.net]
>> Sent: Friday, January 29, 2010 2:56 PM
>> To: lists@subich.com; 'Bill K2OWR'; 'Lee Buller'
>> Cc: amps@contesting.com
>> Subject: Re: [Amps] Good amp to buy
>>
>> Very interesting thread...Thank you!
>>
>>
>> Philip LaMarche
>> LaMarche Enterprises, Inc.
>>
>> www.w9dvm.com
>>
>> 727-944-3226
>> FAX 727-937-8834
>>
>> K3  #1605
>>
>> CCA 98  00827
>> CRA 1701
>>
>> W9DVM
>>
>>
>>
>> -----Original Message-----
>> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
>> Behalf Of Joe Subich, W4TV
>> Sent: Friday, January 29, 2010 2:53 PM
>> To: 'Bill K2OWR'; 'Lee Buller'
>> Cc: amps@contesting.com
>> Subject: Re: [Amps] Good amp to buy
>>
>>
>>
>>> 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.
>>
>> There is a HUGE difference between the design of the AL-82 and the 
>> SB-220,
>> TL-922, L-4B, etc.  The AL-82 was designed in a regulatory environment
>> with
>> 1500 W PEP output (about 2300 W DC
>> input) while the SB-220, TL-922, L-4B, etc. were designed in an era where
>> the legal limit was 1000 W DC input.  The older amps weren't "under
>> designed" - they were designed for the rules in effect at the time with a
>> reasonable safety factor as
>> shown by the amount of "abuse" they regularly survive.
>>
>> The difference represents 50% more plate dissipation (heat), 
>> significantly
>> more stress on the band switch and plate choke, greater energy stored in
>> the
>> filter capacitors, and higher fault currents.
>>
>> Any user who regularly pushes the older amplifiers to 1500 W is courting
>> catastrophic failure.  Will some amps let the user get away with abuse -
>> yes.  I'd stack the L4B up against any of the "modern" amps (particularly
>> with some modern fixes like a faster T/R relay and low voltage PTT line)
>> but
>> 1500 W is still pushing the limits for devices designed for operation at
>> 1000 W DC.
>>
>> 73,
>>
>>   ... Joe, W4TV
>>
>>
>>
>>
>>
>>> -----Original Message-----
>>> From: amps-bounces@contesting.com
>>> [mailto:amps-bounces@contesting.com] On Behalf Of Bill K2OWR
>>> Sent: Friday, January 29, 2010 2:19 PM
>>> To: Lee Buller
>>> Cc: amps@contesting.com
>>> 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
>>>
>>> _______________________________________________
>>> Amps mailing list
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>>
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