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Author Topic: GU43B vs GS35B  (Read 1485 times)
S58F
Member

Posts: 9




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« on: January 02, 2008, 08:44:18 PM »

Hello

I am not have big AMP experience but here is the
question for all AMP enthusias?
What tube you choose if some one build for you HF QRO?
GU43B (out power be approx. 1.3kW) or GS35B (1.5kW)
I know the GS35B put little more power (are worth 200W more)..but some OM sey the GS35B nide good tube cooling.



Thanks Eric

PS.

Sorry for my English
 


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WA9SVD
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Posts: 2198




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« Reply #1 on: January 03, 2008, 10:24:25 AM »

As far as power output is concerned, NO station would be able to tell the difference between 1.3 kW and 1.5 kW; the difference is less than the tolerance of many "wattmeters" and would be almost immeasurable.

    Base your choice on other factors, such as power supply requirements and cooling requirements.
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K6AER
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Posts: 3524




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« Reply #2 on: January 04, 2008, 09:18:17 PM »

For the best IMD performance pick the tube with the highest PEP rating. To get good IMD numbers you will need to build an amplifier of twice the PEP level you intend to run. Best to run a triode in grounded grid no matter what your choice is.
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