• 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
M
Troubleshooting a Dynaco ST-35 noice scratching in one channel
Replies
63
Views
2K
MartinLund
M
J
Dual 866A display questions
Replies
20
Views
1K
Stephen R
Stephen R
S
300b drives 300b, with interstage transformer
Replies
83
Views
9K
Stephen R
Stephen R
D
Finishing a C3M-300B
Replies
51
Views
22K
grataku
G
tiefbassuebertr
Schematic wanted for VTL Preamp "Maximal"
Replies
34
Views
16K
tiefbassuebertr
tiefbassuebertr
wrenchone
6GB5 and Variants as Screen Driven Amps
Replies
89
Views
29K
Fuling
Fuling
G
Dynaco A470 and 4P1L Options
Replies
1
Views
536
6A3sUMMER
6
djn
I found a great on/off switch for preamp
Replies
10
Views
813
wg_ski
W
U
1930's 26 tube amp
Replies
19
Views
2K
jhstewart9
jhstewart9
Fuling
A2 experiments
Replies
36
Views
3K
Fuling
Fuling
F
EC8010 & AD1 & 845
Replies
95
Views
7K
filenet
F
T
BC Components 052 vs. CDE DCMC
Replies
0
Views
207
Tubenstein
T
SoaDMTGguy
Rogue Audio Cronus Magnum III schematic request / mod help
Replies
6
Views
785
SoaDMTGguy
SoaDMTGguy
bcmatt
I'd like to build a headphone/pre Amp without OTs in the vein of the TA-26s or Crack
Replies
7
Views
490
bcmatt
bcmatt
dakata1337
Looking for schematic - C3G Single Ended Triode by Stixx
Replies
4
Views
449
dakata1337
dakata1337
R
No audio signal after swapping capacitors
Replies
26
Views
1K
Kay Pirinha
Kay Pirinha
C
Driver question
Replies
26
Views
1K
Diabolical Artificer
Diabolical Artificer
M
6V6 solid state power supply
Replies
21
Views
2K
mrpunkk
M
Z
Unusual (at least for me! lol) single-ended GM-70 amp
Replies
8
Views
898
baudouin0
B
dubadub
Understanding this "Dynaco 6V6 Push-Pull Amp" circuit + cathode bias in the same
Replies
3
Views
1K
dubadub
dubadub
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