Tom,
It seems you do not know some Chinese tube's history. 811 was called
FU-811 in China .
it is copy from Russian G-811, 813 was called FU-13, it is copy from Russian
GU-13.
Chinese 811 and 813 have been produced morethan 40-50 years. they are
maturity.
572B began to produed only in early 1990s.It copy from The West. it was
design
for the medical machine(shatter the concretion in body), but it seem Chinese
would like
FU-811, not 572B.In this time ,the foreign buyer to find it out , so the
Chinese 572B was
apper in international market .The quality of Chinese 811and 813 are
faithworthy.
But most western buyer did not take notice of a very import information, the
Chinese 811 ,
813 and 572B are NOT same as the West ! Chinese's tube have lower anode volt
and dissipation,
Althought it seem worked not too bad in over rating.
Another information, the Shuguang factory was NOT best tube factory in
China(many Chinese tube factory's name
with "Guang" , it meens " rays of light" or "sheen", Shuguang meens "first
light of morning")
the best glass tube factory in China is Nanjing vacuum tube factory, it
began produced tube in 1930s, now they produce 3-500Z. I think many persons
know its very good quality.The best miniture tube was made in Beijing vacuum
tube factory, but they have stoped miniture tube.Now, they turn to the LCD
pannel.The Best cermic tube was proced
in Jingdezhen city ,Jiangxi province, Jingguang vacuum tube factory, the
Chinese FU-100F(4CX1000A) and FU-251(4CX250B) and FU-728( Chinese design it.it
can replace 4CX1000A direct, but with larger Pa,1200W and better linearity) are
very faithworthy.
73! Hsu
----- Original Message -----
From: "Tom W8JI" <w8ji@w8ji.com>
To: "Fern Rivard" <crc@cyberlink.bc.ca>; "Hsu" <Jbenson@sohu.com>; "kenw2dtc"
<kenw2dtc@comcast.net>
Cc: <amps@contesting.com>
Sent: Saturday, September 30, 2006 10:19 PM
Subject: Re: Boycott New Chinese linear Amplifier
>> I don't know what that "chinese" linear sells for but
>> because it is obviously a "copy" of one sold by Ameritron,
>> we should simply boycott that unit in America and NOT buy
>> it! Fern
>
> The real point I was trying to make is there could be many
> improvements made in that basic design if the Chinese
> actually put some creative engineering into the product. A
> better product at the same cost or even less cost would be
> widely accepted. The real problem is when someone knows so
> little they just copy something exactly they will make a
> poorer product. Blind copying just rips everyone off, much
> like a thief does.
>
> For example the Chinese could be making 811 tubes or 572
> tubes that are actually better than the old USA tubes.
> Instead, since they do not fully understand the tubes and
> what people need, they only make worse copies. 572's and
> 811's are one of the tubes that for very little change in
> cost could be made much better. The Chinese will never make
> that step unless they learn what the problems really are and
> how to improve the problems.
>
> I don't object at all to their making products as long as
> they just don't copy weak points and sell them. What that
> will do is turn back the reliability of everything and stop
> new innovation all over the world. They need to change that
> "thoughtless copy" mindset.
>
> 73 Tom
>
>
>
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