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GU-19 In priboi
GU-19 In priboi
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Old 16th January 2011, 07:28 PM   #1
tchiwam is offline tchiwam  Finland
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Location: Lapland, Finland
Default GU-19 In priboi

I got the GU-19 tubes and tried them right in the Priboi.
Anode = 480V
G2 = 240V
G1 = -20V

I can't get lower yet with this chasis, I guess -15V should be better.

The sound is OK, Sad thing is I don't have a proper model. Any ways I could wire the transformer to give 420V instead of 480V ?
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Old 16th January 2011, 07:33 PM   #2
Wavebourn is offline Wavebourn  United States
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GU-19 In priboi
May be some quiet fan can help?
Nothing in the universe is perfect. The ideal things are the ones that are most optimal. Optimization criteria, what matters. When I hear "No Compromise Design", I want to take a sledgehammer and test how impact-proof it is.
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Old 16th January 2011, 07:39 PM   #3
tchiwam is offline tchiwam  Finland
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No fan needed, well yet...

The design quality of the GU-19-I is amazing compared to the 6R3S ! What I need now is a proper spice model for that lamp. At -25V it start clipping.
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Old 4th April 2011, 08:06 AM   #4
zbodeoc is offline zbodeoc  Europe
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Hi there! Long time no see...

Quick question, have anyone tried viceversa? I mean replacing FU29(GU29) with 6R3S (Proboi-like) into an amplifier like this one? AUDIOROMY "FU29" Integrated Amplifier - FU29 Tube Amp @ on9mart.com

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