[Amps] AMERITRON AL-80B TUBE ARC / SPLATTER

[Wynand]

Hello Tony,

Yes the arc is inside the tube.... as grid current increases with an
increase in RF the tube start to glow red and then suddenly blue arcs start
to flash quite symmetrically right at the bottom of the tube just above the
glass seal. This tube does not have a metal ring at the bottom.

Now even if the tube is bad, why do I still have not plate current at all,
as amplification do take place, at around 100mA and 20 watts drive I see
around 180 watts on the Bird?  

73,

Wynand, ZS6ARF 

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Tony Brock-Fisher
Sent: 22 June 2009 11:08 PM
To: Amps at contesting.com
Subject: Re: [Amps] AMERITRON AL-80B TUBE ARC / SPLATTER

If the arc is really *inside* the tube, I'd toss it in the trash to start
with. You can test the HV while waiting for the new tube to arrive...



-Tony, K1KP
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