[Amps] Need reliable source for ACOM2000A tubes GU74B?

[kq2m at kq2m.com]

Hi,

I want to thank everyone for their responses to my questions!

I am going to pursue some of these options after I hear back from Val at 
ACOM.

Tnx again and 73

Bob, KQ2M


On 2022-11-23 17:50, Yueh Hsu wrote:
> A few related information, more than a decade ago, the Chinese tube
> manufacturer, Jingguang once produced the GU-74B in small quantities,
> I guess it was for the weapons systems imported by China from Russia
> in the 90s as spare parts. But over the years, as these obsolete
> weapons systems have been gradually abandoned in the Chinese military,
> it seems that Jingguang no longer produces them. But I think that if
> there is enough market demand, it is possible to restart the
> production line. Furthermore, I have carefully compared the parameters
> of the 4CX250B and the GU-74B, and I found that three 4CX250Bs can
> perfectly replace one GU-74B. The input capacitance is almost
> identical, one problem is that it seems that the 4CX250B will have
> problems operating above 2500V, but I am sure that the 4CX250B can
> operate at 2500V, although its datasheet says that the maximum voltage
> is 2000V. The second problem is physical space. Three regular 4CX250B
> sockets and the chimney system will certainly take up more space than
> a GU-74B and chimney system, but it is feasible to use a small socket
> (not necessarily a GU-74B socket, such as a 2P29K socket that
> perfectly matches the 4CX250B) and make your own socket + chimney
> system.
> 
> <kq2m at kq2m.com> 于2022年11月24日周四 02:38写道：
> 
>> I need to replace one set of tubes for my ACOM2000A.
>> 
>> Can anyone confirm that GU74B is the correct tube?  If not, what is
>> the
>> correct tube?
>> 
>> Does anyone know of a reliable source for the ACOM200A good quality
>> tubes?  Approximate cost?
>> 
>> Tnx & 73
>> 
>> Bob, KQ2M
>