[Amps] Fwd: vacuum tube test

[Yueh Hsu]

---------- Forwarded message ---------
发件人： Yueh Hsu <hsu4qro at gmail.com>
Date: 2019年11月10日周日 上午3:27
Subject: Re: [Amps] vacuum tube test
To: Fuqua, William <wlfuqu00 at uky.edu>


Bill， I really forgot it。 Could  you tell me your idea?my idea:I think it
should be combine a Hi-pot tester and two DC variable power supplys, one
for filament , another one connect  with cathode and plate +G1+G2 tie
together, It can test  transmission of cathode, the key is how many
current  is should be? for hi-pot tester, how many leake current between
cthode and G2?it should below 5uA? 10uA?for anther one, it shoube be
1A,2A?, maybe difference tube have  difference data, I know it will damage
the tube if test  the tube too long time.I have danage one.homebuild a
transmiting
tube tester is a interesting topic.
    Regards
                 Hsu

Fuqua, William <wlfuqu00 at uky.edu> 于2019年11月9日周六 下午2:07写道：

> Years ago I built a portable transmitting tube tester in an old Hickcock
> case.
> It ran off a 12V car battery and I used it often to test tubes at
> Hamvention and
> home.
>   Unfortunately I disassembled it and started a redesign to allow me to
> get above 1.5kW tubes.
>   Maybe a few of you remember seeing it.
> 73
> Bill wa4lav
>
> ------------------------------
> *From:* Amps <amps-bounces at contesting.com> on behalf of Yueh Hsu <
> hsu4qro at gmail.com>
> *Sent:* Friday, November 8, 2019 11:09 PM
> *To:* Amps <amps at contesting.com>
> *Subject:* [Amps] vacuum tube test
>
> I often seen there are somem people sell very cheap tube in the net.but if
> you can not have amplifier, how to test ?I do  know how to test in the
> factory,But who have a large test bench what with high power HV power
> suply?
>  I you only have a low volt power supply and a Hi-pot tester, how to test a
> certain tube?  for example 3CX 1500A7, 4CX1000A, 4CX 1500B,4CX 250B and 4CX
> 800A
>      Regards
>                  Hsu
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