[Amps] Question on installing new Amp tube

[Mike Tubby]

If the 3-500Z has stood for a long time unused I suggest you use the 
'Reactivation 3-500Z' procedure by PA0FRI, here:

     http://pa0fri.home.xs4all.nl/Lineairs/TL922/tl-922eng.htm

When I did this with a new-old-stock tube I used 40V and had no 
significant current indication for about 1.5 days, then the current 
meter started to 'flick' a few milli-amps and back to nothing and then 
after a few more hours it started a constant reading of around 50-60mA 
which then rose until it hit my current limit.

I used a pair of 0-20DC bench power supplies in series to get 40V and 
set the current limit at 400mA.

After the reactivation I put the tube in a PA and it worked fine.


Mike G8TIC



On 03/08/2015 20:13, w4foa at comcast.net wrote:
> Please forgive my ignorance.
> I am going to install a new (old stock) 3-500Z in my amp. Are there procedures that I must follow. I've read and heard about "getting" but I don't have a clue what that means. I think it means "burning in" but not clear what the procedure should be.
> Anyone help?
> Thanks in advance!
> 73
> Tony, W4FOA
>
>
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