• 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
gerrittube
Coupling capacitor formula
Replies
4
Views
494
gerrittube
gerrittube
Windcrest77
Mr. Carlson and George (tubelab) need to get together on this project
Replies
12
Views
1K
silverprout
silverprout
A
bias resistor failure following rectifier destruction
Replies
3
Views
258
Sorento
Sorento
SoaDMTGguy
ARC SP-10 power supply voltage regulator problem - output is shorted to ground
Replies
19
Views
673
LuvValve
L
OldHector
EL34s - is 800VDC too much?
Replies
32
Views
1K
gorgon53
G
G
Altec 1569A oscillation issues
Replies
46
Views
3K
grover
G
A
1:10 rule impedance matching
Replies
10
Views
1K
rayma
rayma
T
Level shifter using pentode and schade feedback?
Replies
11
Views
635
20to20
2
G
Compact KT88 SET monoblocks
Replies
11
Views
876
kb2wyl
K
R
Old interstage transformer pinout (B, P, G, F?)
Replies
3
Views
331
directdriver
directdriver
Johnloudb
VT130 Audio Research Repair
Replies
33
Views
2K
Johnloudb
Johnloudb
C
Linear Audio High-voltage Delay for Tube Amplifiers V4
Replies
7
Views
424
jan.didden
jan.didden
Tibetan
6L6WGB Types - Tonal Difference?
Replies
4
Views
382
6A3sUMMER
6
Miniwatt
TV damper diode heater grounding
Replies
8
Views
560
soulmerchant
soulmerchant
F
Film vs. bypassed 'lytics in OTL headphone amp
Replies
1
Views
204
6A3sUMMER
6
W
Elektor Claus Byrith 4-30
Replies
253
Views
34K
6A3sUMMER
6
B
What Qualities Makes A Good Output Transformer
Replies
49
Views
4K
gorgon53
G
B
Voltage double from heater secondary
Replies
18
Views
485
Tom Bavis
Tom Bavis
P
Fatman Itube MK1 amplifier
Replies
2
Views
324
vinylkid58
vinylkid58
E
801a tube preamp
Replies
54
Views
9K
swak
S
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