FU-728F was design by Chinese independently, it can not replace
4CX1500Bdirect, you need do a bit some work ( Chanage filamet voltage to 9V )
but more powerful, it can output morethan 2000W
@Ua=3200V
73!Hsu
----- Original Message -----
From: <vk3pa@vk3pa.com>
To: <amps@contesting.com>
Sent: Tuesday, September 29, 2009 11:03 AM
Subject: [Amps] FU728F Tube
> is it FU728F the same as 4CX1500 but made in China?? es wot r the speck's!!
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