>
>The getter on the GS-35B (and GI7-B, etc.) is on the cathode.
>
Do you know exactly where it is, Mike - for example, in relation to any
of these photographs?
http://gs35b.com/gs35b/bang.html
>IIRC, the filament should be run for several days with no other
voltages
>applied. One site says to bring up the filament voltage gradually over
a
>time. Google is your friend, there's a ton on info about this out
there.
>
But you also need to be careful about what kind of advice you're trying
to follow. For example, there is lots of info about conditioning of the
3-500Z, but that advice is almost totally inapplicable to the GS35b
because the two tubes are so very different.
The GS35B doesn't have a filament; it's an indirectly heated cathode.
Unlike the anode of a 3-500Z, the anode of a GS35b is designed to run
cool, not hot. But the GS35b isn't much like an 8877 either, because
this is a planar triode - the electron emitting surface is the flat
white disk that you see underneath the grid.
73 from Ian GM3SEK
>-----Original Message-----
>From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Mike
>Waters
>Sent: 25 February 2015 21:32
>To: Ian White
>Cc: nemo zilch; amps@contesting.com
>Subject: Re: [Amps] GS35B Gassy, or Arcing?
>
>The getter on the GS-35B (and GI7-B, etc.) is on the cathode.
>
>IIRC, the filament should be run for several days with no other
voltages
>applied. One site says to bring up the filament voltage gradually over
a
>time. Google is your friend, there's a ton on info about this out
there.
>
>73, Mike
>www.w0btu.com
>
>On Wed, Feb 25, 2015 at 3:25 PM, Ian White <gm3sek@ifwtech.co.uk>
>wrote:
>
>>
>> I'm not sure where the getter(s) are on a GS35B, but most likely
close
>> to the cathode which is the hottest part of the tube. I don't believe
>> there is a getter on the anode because that surface doesn't get very
>> hot, but if you do arrange for some extra anode dissipation, it will
>> help to raise the temperature of the whole tube to some extent.
>>
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