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833 and GU-48
833 and GU-48
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Old 31st March 2005, 12:58 PM   #1
Eugeny is offline Eugeny  Ukraine
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Join Date: Mar 2005
Location: Donetsk
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Default 833 and GU-48

I test at Vp= 980 V , Ip= 120 mA and Grid connect to Gnd.
Plate no shows an orange-red colour
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Old 1st April 2005, 05:35 AM   #2
ReinoutdV is offline ReinoutdV  Netherlands
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Join Date: Feb 2004
Location: Elst
Default my GU48 does....

Hi Eugeny,

funny....at those voltage (some more current) my GU48 does show some reddish colour.

I noticed your wire-size of the filaments: maybe i'm mistaken but those look incredible small. It's 10V/10A were talking here.
If your wire gets warm....you know you are firing up your GU48 not at the intended 10V/10A....but less.....

In what kind of amp you're going to use this triode ?

The GU48 is a real bass-monster, but not as detailed in the heighs as American or Chinese 833's. But for the price....who complains ?

Lots of building pleasure,

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