Thanks,Richard.
The big problems is the factory no merchandise on hand now.
they ask $190/ea for the 3-500Z now!
73! Hsu
----- Original Message -----
From: "Hsu" <Jbenson@sohu.com>
To: "R L Measures" <r@somis.org>
Sent: Monday, July 24, 2006 12:21 AM
Subject: Re: [Amps] 3-500Z convertion
> The big problems is the factory no merchandise on hand now.
> they ask $190/ea for the 3-500Z now!
> 73! Hsu
>
> ----- Original Message -----
> From: "R L Measures" <r@somis.org>
> To: "Hsu" <Jbenson@sohu.co>; "Hsu" <Jbenson@sohu.com>
> Cc: <amps@contesting.com>
> Sent: Sunday, July 23, 2006 9:34 PM
> Subject: Re: [Amps] 3-500Z convertion
>
>
>>
>> On Jul 23, 2006, at 5:14 AM, Hsu wrote:
>>
>>> 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!
>>
>> You only need one tube because the Mu of an Eimac tube and the Mu of
>> a Chinese tube is similar. Also, if the tube manufacturer has tight
>> tolerances and good quality control, there is no need to match tubes
>> because all of the tubes that get through final test will be
>> virtually the same.
>>
>>> 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
>>>>
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
>>
>> R L MEASURES, AG6K. 805-386-3734
>> r@somis.org
>>
>>
>>
>>
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