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老大 问一下
ameritron al-811h hf power amplifier 能不能换成4个572b管子
换了之后还要不要挑什么东西?
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yes, you can put 572b in. i tried this few months ago.
572b will give you more power and much less heat.
however, 572b is far more expensive than 811a.
if you pay $1 for 811a, then 572b is about $3.
hope this answer your concern.