[Amps] Thinking out loud 3-500Z and the like gettering

[John Lyles]

A common process is using Induction Heating with graphite crucibles,
 From wikipedia...
"Induction heating is often used to heat graphite crucibles (containing 
other materials) and is used extensively in the semiconductor industry 
for the heating of silicon and other semiconductors."

I believe that this is still a very risky way to heat a precious RF tube 
just to help gettering. Bombarding the anode and grid with beam (while 
staying within allowable dissipations) is straight forward. Or just 
using the tubes as the OEM intended and allow the getter to work via 
normal operation of the tube.

73
John
K5PRO




> Message: 1
> Date: Thu, 16 Jun 2016 17:11:38 +0100
> From: Alan Ibbetson <alan at g3xaq.net>
> To: amps at contesting.com
> Subject: Re: [Amps] Thinking out loud 3-500Z and the like gettering
> Message-ID: <b5d412be-8eef-0809-b729-4046c5e45914 at g3xaq.net>
> Content-Type: text/plain; charset=windows-1252; format=flowed
>
>> It looks to me like they won't heat the graphite anodes in the modern
>> day 3-500Z and similar tubes. They would have to be the metal type
>> anodes for the induction heater to work.
>
> This video suggests differently
>
> https://www.youtube.com/watch?v=fXsIbJG-r0U
>
> 73, Alan G3XAQ