[Amps] FU728F Tube

[Roger]

Roger wrote:
> Hsu wrote:
>   

Google searches come up with lots of results, but after 2 hours I've 
still found none that give me the tube characteristics other than I know 
it's similar to a 4CX1500B with a different filament voltage and has 
more output.

I'm assuming the other voltages and constant current curves are the same 
or close to the 4CX1500. What about 3rd order distortion?

73

Roger (K8RI)

73

Roger (K8RI)
>> 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
>>   
>>     
>
> Where can I find the data sheets and where are these available for how much?
>
> 73
>
> Roger (K8RI)
>   
>>    73!Hsu
>> ----- Original Message ----- 
>> From: <vk3pa at vk3pa.com>
>> To: <amps at 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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