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@integral.com.br>
> To: <AMPS@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
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
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