[Amps] why not 3-500Z

[John T. M. Lyles]

Amperex/Covimag tubes continue to be distributed by Richardson 
Electronics, but I heard through the grapevine that they no longer 
'own' the Covimag facility as a captive supplier. One can inquire for 
a 3-400Z/8163 from REL, but the price would be steep if they had new, 
and even so with NOS. It doesn't make sense to beat the bushes for 
that tube when a 3-500Z would probably work in the same socket with 
minor adjustments.

73
John



>On Oct 1, 2005, at 11:29 AM, John T. M. Lyles wrote:
>
>>We have no more good 3-400Z's, a box of duds left. I have 6 sockets 
>>for these tubes that must operate 24/7 all year, so cannot afford 
>>to wait for someone to start producing 3-400z again.....
>
>Amperex no longer makes the 8163?
>>
>>Ciao
>>John
>>K5PRO
>>
>>>On Sep 29, 2005, at 12:26 PM, Peter Chadwick wrote:
>>>
>>>>Rich said
>>>>
>>>>>In pulse service. 3-500Zs offer virtually no advantage over 3-400Zs.
>>>>
>>>>Electrically, this almost certainly true. But how about price and
>>>>availability?
>>>
>>>The issue is about changing out good 3-400Zs for 3-500Zs.
>>
>>
>
>Richard L. Measures, AG6K, 805.386.3734.  www.somis.org