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Old November 1st 05, 02:37 PM
Lazy Senior
 
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Default Old Xmtrs, "Ancient Modulation" and Modern Amps (Only in America)

William Warren wrote:


Lazy Senior: I feel your pain!

If I were you, I'd look for any of the "2KW PEP" linears that come up on
Ebay or at hamfests, such as an L-4B: any linear rated for 1KW key-down
continuous input will work fine.

If you are using coax, don't forget to check it for breakdown voltage
before loading up: AM peaks will put a lot of strain on older cable.
Don't ask me how I know ;-).

HTH.

William


William

Thanx for the info. It seems like most hams I work on AM that use amps
are using linear amps, but much to my surprise there are many here in
this group that are against using linears.

Lazy (yes) Senior (yes)
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Old November 2nd 05, 02:31 PM
William Warren
 
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Default Old Xmtrs, "Ancient Modulation" and Modern Amps (Only in America)

Lazy Senior wrote:

William

Thanx for the info. It seems like most hams I work on AM that use amps
are using linear amps, but much to my surprise there are many here in
this group that are against using linears.

Lazy (yes) Senior (yes)



Well, you can go either way, but linears are simpler, self-contained,
easy to service, and they help keep the room warm.

High level plate modulation was "The way to go" before the FCC switched
to measuring output power instead of input, and I understand why some
hams would want to use Class C finals and high level modulation, since
that's the best way to get the most efficiency out of a 1 KW input rig.
Now that we measure output power, I don't feel that the added hardware
and maintenance of using high-level modulation is justified. Others may
disagree.

My attitude is "If it isn't fun, stop doing it" - this is a _hobby_, but
somehow a few hams never get the word. If having a "big iron" rig is
what turns you on, go for it. If you want to maximize efficiency and
homebrew a rig from scratch, there are Class E designs available using
computer components to good effect. If you're interested in a smaller
footprint and interoperability with SSB or other modes that need
linears, then a linear is a practical alternative.

FWIW.

William

--

William Warren

(Filter noise from my address for direct replies)
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Old November 3rd 05, 12:33 AM
Lazy Senior
 
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Default Old Xmtrs, "Ancient Modulation" and Modern Amps (Only in America)

William Warren wrote:


My attitude is "If it isn't fun, stop doing it" - this is a _hobby_, but
somehow a few hams never get the word.

FWIW.

William


William
We think alike. Too many hams take hamradio way too seriously. Its not a
way of life, its just a small part of my life.

I am a long time ham -45 yrs-. After posting here for the first time I
was called a troll simply because I asked a stupid question which I
didnt know the answer to. Altho having been a ham for so long, I am not
particularly tech inclined.In other words my life doesnt revolve around
electronics and theory.I know fom experience many hams look down on
those who are only Tech lites or Generals. It is no surprise young
people dont want to join our ranks.

You were one of many who gave me a very informative answer in language I
could understand. I only wish more had your attitude.

Thanx and hope to CU on AM
Lazy Senior






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