On May 29, 4:31*pm, Robert wrote:
Will wrote:
Hi all ,
I am replacing the 7146's on my Kenwood 520s and would like to know if there
is a certain proceduere I need to go through to neutralize the tubes for
optimum performance and maximum life.Thanks in advance .

PS I'm kinda new at this so be gentle

Hi,
Yes you need to neutralize your new final tubes. Do a Google and locate
a copy of the TS520S manual and download it. You will find the
procedure in there. Good luck with your 520, its a great set.

The operating manual, which has neutralizing instructions, is
available free from the Kenwood site:
http://www.kenwoodusa.com/Support/AMA_Radios/#_
Scroll down to the "Amateur Radio Manuals" window and select the
model.
Also, download the service bulletins from the window below it.

Richard Knoppow
WB6KBL