[Heathkit] Reactivation of a 3-500

[Donald Spoon]

PA0FRI has a discussion on "reactivating" Power Tubes at his web site.

http://www.pa0fri.com/

It is under the "QRO" tab I believe.  That information might be useful. 
  I have used it on 572 tubes and it has worked a few times for me.  It 
has been more useful in identifying "soft" tubes for me.

-Don Spoon-
K0APK

On 5/16/2014 4:15 AM, Ulrich Graf wrote:
 > Hi to the list,
 >
 > got an SB-1000 linear amplifier recently second hand. While 
activating PTT
 > I noticed that the bias current is continuously increasing. Bias network
 > seems to be ok. So the tube must have drawn some gas. How can I activate
 > the getter the easiest way to reuse this tube again? Many hours of 
heating
 > do not work.
 >
 > vy 73, Uli, DK4SX