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Old 19th Aug 2019, 8:10 pm   #5
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Default Re: Woodstock PA system....

Quote:
Originally Posted by G6Tanuki View Post
(lots of parallel tubes also mean you can trade lower HT volts against higher HT current - 500V at an amp or so is more open-air-rainy-venue-friendly than 2KV at 250mA)
And with the lower HT you need a lower ratio in the output transformer and this militates towards better bandwidth and less disturbance from strays.

David (once the constructor of a 4x813 audio amp)
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