Hello Hsu:
As others have discovered, we can not reply directly to you from the United
States. Additionally, my spam filter automatically deleted your email to
me, before I could read your message.
I have changed my filter settings, and your emails will now be received.
Please resend your email to me. It will reach my computer this time.
Thank you.
73,
Mike
W2AJI
----- Original Message -----
From: "Hsu" <Jbenson@sohu.com>
Cc: <amps@contesting.com>
Sent: Sunday, July 23, 2006 8:14 AM
Subject: Re: [Amps] 3-500Z convertion
> Thanks Peter!
> I have got a a died TL922 as a junk,I only pay $100 for it.so I
don't want pay for it too much.Althought the 3-500Z are made in China, but I
call the factory, They ask me pay $500 for a matched pair!Mr.Richard L.
Measures have mentioned in the list that 3-500Z can replace by 4-400(need
some work),I have a pair 4-400C, but I just test them, they all died!in
this weekend, I check my junk box, and find out some NOS Chinese
FU-500Fs(same as 4X500A) and its socket, I just read its datasheets , I
found the screen and grid dissipation power not too small, so,I think maybe
it can work in GG and cathode drive.It have same volt and cureent of
filament as 3-500Z.
> 73! Hsu
>
>
> ----- Original Message -----
> From: "Peter Chadwick" <g3rzp@g3rzp.wanadoo.co.uk>
> To: "Hsu" <Jbenson@sohu.co>; <amps@contesting.com>
> Sent: Sunday, July 23, 2006 7:14 PM
> Subject: Re: [Amps] 3-500Z convertion
>
>
> > Hsu said:
> >>My TL922's 3-500Zs died,I have some 4X500As,it seems the 3-500Z can
convertion by 4X500A, <
> > The 4X500A is an external anode tube, so the cooling won't be right, it
needs a different socket, and it's a tetrode. You'd need to do soem careful
calculation to determine if the grid and screen dissipations would be
exceeded. All in all, i'd say buyin a pair of new 3-500Z is a better way to
o.
> > 73
> > Peter G3RZP
> >
> >
> >
> >
> >
> > ========================================
> > Message Received: Jul 23 2006, 11:54 AM
> > From: "Hsu"
> > To: amps@contesting.com
> > Cc:
> > Subject: [Amps] 3-500Z convertion
> >
> > Hi, I'm a new member.My TL922's 3-500Zs died,I have some 4X500As,it
seems the 3-500Z can convertion by 4X500A, Does anyone have this
experience?Thanks in advance!
> > 73! Hsu
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> > _______________________________________________
> > Amps mailing list
> > Amps@contesting.com
> > http://lists.contesting.com/mailman/listinfo/amps
> >
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