Cliff:
The FM broadcast rigs are mostly solid state up to 20 kW.
The mediumwave broadcast rigs are mostly solid state up to 100 kW.
Shortwave rigs, which are 50 kW and above and generally 100 kW to
500 kW, use mostly tubes.
It is just not in the cards today to make a 100 kW carrier, 400 kW PEP
HF transmitter using solid-state devices.
Your statement that
> the broadcast, commercial and military transmitter industry has long ago
> switched from archaic tube amplifier technology to solid state devices.
is stretching it a bit! Below 20 kW, yes, but the "industry has long ago
switched" is simply not correct. The reason for my sensitivity on this
issue is my association with high power transmitter design.
True, hams (who are supposed to stay below 1500 W PEP output)
should be using a solid-state approach. But the "industry . . ."
is not true.
- Jim WB6BLD
----- Original Message -----
From: "N7HIY" <N7HIY@comcast.net>
To: "Jim Kearman" <jkearman@att.net>; "Amps" <amps@contesting.com>
Sent: Wednesday, March 29, 2006 2:47 PM
Subject: Re: [Amps] "I gotta tell this"
> the broadcast, commercial and military transmitter industry has long ago
> switched from archaic tube amplifier technology to solid state devices.
> we, ham radio, are the laggards in the change of technology
> even the Russian and Chinese hams are leading the US hams in the change
> we will go QRP from lack of energy and oil long before the few thousand
> hams
> that run tube amps run out of replacements
>
> Cliff N7HIY
>
> ----- Original Message -----
> From: "Jim Kearman" <jkearman@att.net>
> To: "Amps" <amps@contesting.com>
> Sent: Wednesday, March 29, 2006 9:04 AM
> Subject: Re: [Amps] "I gotta tell this"
>
>
>> If we're going into politics, maybe we could discuss the ramifications of
>> the widening gap between Russia and the U.S. If the Russians cut off the
>> supply of power tubes to the U.S., a lot of us will have to go QRP!
>>
>> 73,
>>
>> Jim, KR1S
>> http://kr1s.kearman.com/
>>
>> _______________________________________________
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>> http://lists.contesting.com/mailman/listinfo/amps
>
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