on 4/3/01 2:24 PM, Tom Rauch at w8ji@contesting.com wrote:
>
>> I used 100 watts (20 meter band) from my ICOM IC761 with the 4-1000A
>> at 3500 volts and my YAESU wattmeter showed 2000 watts PEP.
>
> Buy a new wattmeter, that reads correctly. Perhaps you have
> accumulated errors, but you certainly do not have the gain at 3500
> volts you think you have. I would say it is off by a factor of two or
> more. I doubt you even have 1000 watts out with 100 watts of drive
> with 3500 volts and a 4-1000A.
Tom is absolutely right here. There is no way that 100 Watts at 3500 Volts
will give 2000 Watts PEP. I would believe 2000 Watts PEP INPUT power. Most
of the old assembly ideas were based on a 3500 Watt plate supply with a 2000
KW input (aka 1KW output).
I disagree with Tom saying the 4-1K is not an impressive tube. If one likes
the romance of the old firebottles, than this is the tube for you. I love
mine and I plan on keeping it a long time. I get VERY good, loud audio
reports from people. I have been told I have broadcast quality audio many,
many times. Maybe it's just my rig, but I feel the tube at 6KV provides
little distortion.
73,
Jon
NA9D
-------------------------------------
Jon Ogden
NA9D (ex: KE9NA)
Member: ARRL, AMSAT, DXCC, NRA
http://www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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