The funniest thing I ever heard about MFJ-Ameritron amplifiers was
from the "expert" who designed them, who told me that they don't have
a glitch resistor because the filter caps Ameritron buys have so much
internal R that they just don't need one.
On May 17, 2006, at 5:07 PM, Bob Maser wrote:
> All of this proves my point about Ameritron amps. They make the
> Heathkit
> amps of yesteryear seems Collinsesque. When are you newcomer hams
> going to
> learn that anything that comes from MFJ is junk. I'm sure the
> ARRRRGHL
> loves them because they spend a lot on advertising in their s--t
> magazine.
>
> Bob W6TR
> ----- Original Message -----
> From: <Gudguyham@aol.com>
> To: <vic@rakefet.com>; <n9iww@verizon.net>
> Cc: <amps@contesting.com>
> Sent: Wednesday, May 17, 2006 6:24 PM
> Subject: Re: [Amps] adding second tube to AL1200
>
>
>>
>> In a message dated 5/17/2006 4:23:10 P.M. Eastern Standard Time,
>> vic@rakefet.com writes:
>>
>> Off the top of my head, you would probably need an outboard power
>> supply, since it's doubtful that a larger transformer would fit.
>> Then
>> you'd need to change the input network components for half the
>> impedance, and likewise the output pi-network. You might not have
>> sufficient range in tuning/loading capacitors for the low bands
>> for a
>> reasonable Q. Of course, Ameritron is known for borderline tank
>> inductors, so you might have to replace the coils with ones made of
>> larger wire or tubing to handle the RF current. And you'll need a
>> bigger filament transformer. Probably you'd have to modify the
>> metering
>> circuits. Hmm, let's see, did I forget anything? Oh yes, the
>> blower
>> capacity will be inadequate.
>>
>> Why don't you just build a new one?
>> --
>> 73,
>>
>>
>>
>> I agree 100% Vic.......not a good idea at all. 73 Louie W1QJ
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R L MEASURES, AG6K. 805-386-3734
r@somis.org
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