[Amps] FL-2100Z

[Hsu]

I think the Taylor's are made in China, if so, you'd better to purchase 
 Svetlana's 572B.But Chinese tube very cheap.
 Many friends of mine include tube factory engineer told me  , if Chinese 811A
 not run over rating, its life will reach 4000-5000 hours or longer.One of  my friend  
 is a doctor ,he use a short wave medical  equipment, use a pair Chinese 811A,and 
 output is 150-300W , he use it for 8 hours every day,every year use for about 280-300 days,
 a pair 811A can use 2-3 years.Another friend, he is a retire Lieut.Col.,a radio engineer.
 he service  Chinese TYPE91  150W AM/CW   transmitter for about 20 years(1960s-1970s), the final
 is a FU-13(813),modulater is apair FU-811(811A), he told me that pair 811A can use more than
 8 years in very hard use cndx( some times the transmitter was oprated morethan 20 hours every day) .
 Actually,Many 
 amplifier use Chinese 811A or 572B was run in over rating cndx.this lead to Chinese 
 tube very short life. You'd better run it in lower output power(IE ,AL811H's outputer no more than 600W)
   73! Hsu
>   
> 
> ----- Original Message ----- 
> From: <py2xb at integral.com.br>
> To: <AMPS at contesting.com>
> Sent: Friday, March 09, 2007 6:47 AM
> Subject: [Amps] FL-2100Z
> 
> 
>> 
>> Hello
>> I have purchased a FL2100-Z and it is likely that I will need to replace
>> the tubes (572Bs). RF parts carries Svetlana matched pairs and Taylor
>> matched pairs. Which brand is the best fit for the amplifier ?
>> 
>> I think RF Parts is a reliable source. Any other transmitting tube source ?
>> 
>> Inputs are appreciated. Thnaks  Fred PY2XB
>> 
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