• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Tubes / Valves

All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum
J
Is there any such thing as "too much" inductance in a filter choke?
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10
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1K
mdpaudio
M
S
Occasional Big noise 100 Hz
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15
Views
542
rayma
rayma
D
Help? Bogen CHA70a amplifier schematic???
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4
Views
352
rayma
rayma
S
Inherited DIY Tube PreAmplifier
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8
Views
677
revintage
revintage
J
TDA1541 tube output stage?
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19
Views
2K
Lingwendil
Lingwendil
D
Vacuum tube circuit schematics?
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49
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4K
dimwatt
D
B
NEC 12R-LL3 for 12AU7?
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3
Views
538
OldHector
OldHector
tiefbassuebertr
New email Address of GlassWare Audio Design?
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1
Views
378
pieter t
P
K
Grid Choke for 300B
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5
Views
534
Kwongb
K
M
Zaerix E81CC
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24
Views
2K
huggygood
huggygood
M
Rod Coleman's Filament Supply + Tens Labs negative bias module
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14
Views
1K
marcomariutto
M
T
AGM 12V battery on filaments
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8
Views
373
toshiba_nz
T
Herr Grau
EAR 834P mod - help identifying components
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42
Views
18K
Oleg Turbin
Oleg Turbin
J
About advertised power output numbers...
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12
Views
639
Tubelab_com
Tubelab_com
S
Eimac 35T OTA experiment
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13
Views
1K
ReinoutdV
R
S
EI output transformer
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10
Views
1K
quadtech
Q
F
Prima Luna Prologue Premier is a bit ill.
Replies
9
Views
546
huggygood
huggygood
D
Blackstar HT5RH MKII sound fades to nothing after a few minutes
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0
Views
295
davidet1000
D
cogitech
Running Tube Amps in Japan - Ground?
Replies
10
Views
908
cogitech
cogitech
J
Heathkit IT-17
Replies
7
Views
1K
jimtone
J
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