• 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
S
Low voltage high current rectification
Replies
78
Views
3K
sser2
S
Mosquito
Olson AM-240 schematic needed
Replies
22
Views
4K
shermanr
shermanr
Ryssen
6AS7G SE or P-P?
Replies
43
Views
5K
egellings
E
A
Why voltage shot up
Replies
11
Views
497
Audiohifi
A
wrenchone
Russian Tube ID
Replies
20
Views
1K
wrenchone
wrenchone
E
Marantz 7 preamp inspired clone issues
Replies
6
Views
1K
ee.jcesar
E
R
Tube AC heaters on PCB
Replies
10
Views
648
MagicBus
MagicBus
T
High end transformer manufacturer in Europe/UK?
Replies
34
Views
6K
waltube
waltube
B
Elimination of Grid Stopper Resistors and Weird Behavior between Preamp and Amp
Replies
16
Views
1K
20to20
2
W
Gulbransen APS-5 power amp - ground-up rebuild
Replies
12
Views
851
tikiroo
tikiroo
M
Newly aquired Tube preamplifier - need opinions
Replies
14
Views
683
andyjevans
andyjevans
Kcou
Dangerous to cut these tubes open?
Replies
19
Views
957
Kcou
Kcou
B
Cap/Resistor Values: Aikido ACF 12VAC Tube Buffer
Replies
8
Views
811
Steve Morley
S
C
Limiter surge resistor question
Replies
10
Views
371
6A3sUMMER
6
H
Grid Current moving bias . Best solution ?
Replies
10
Views
911
rayma
rayma
edbarx
Asked chatGPT some questions about thermionic tubes
Replies
5
Views
471
20to20
2
S
Linlai 300B-N
Replies
34
Views
4K
triode_al
triode_al
B
6P1P-EV What is closer, the 6AQ5 or the 6V6
Replies
6
Views
1K
mondogenerator
mondogenerator
C
Screen grid resistors question
Replies
4
Views
541
jhstewart9
jhstewart9
Rundmaus
Rundmaus at work - PP1C without sand
Replies
58
Views
21K
Rundmaus
Rundmaus
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