• 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
R
Unknown transformers
Replies
2
Views
579
jean-paul
jean-paul
T
DEH610 DEL610 anyone played with this one?
Replies
10
Views
421
toshiba_nz
T
T
UV199 tube...anyone uses them?
Replies
1
Views
286
wparks
wparks
A
Parallel SE 6V6 amplifier questions / design
Replies
28
Views
2K
andyjevans
andyjevans
wrenchone
Voltage Capability of Russian 6V6 Analog
Replies
6
Views
315
wrenchone
wrenchone
N
Capacitor value change/upgrade in Blue Vevet preamp
Replies
7
Views
384
Neiljd990
N
Beauregard42
Building a radio receiver: Need help on the audio stages
Replies
6
Views
415
Hearinspace
H
F
Looking For Manual Fixed Bias Board
Replies
21
Views
555
Freecrowder
F
A
Lowering rectifier voltage in tube amplifier
Replies
30
Views
2K
jan.didden
jan.didden
I
Weird 7F7 adapters on eBay
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5
Views
278
grovergardner
G
Dieter Geissel
Schematic Musical Paradise MP-701
Replies
6
Views
428
petertub
petertub
Tobi461
SRS461 | QE08/200 Monoblock Amps
Replies
49
Views
10K
as_audio
A
S
6LU8 PP help please
Replies
14
Views
410
KeesB
K
OldHector
The Problems of Parallel
Replies
21
Views
886
KeesB
K
jcalvarez
Mazda 6P26 curves?
Replies
2
Views
129
jcalvarez
jcalvarez
jhstewart9
A Purpose Built Class AB2 PP 6F6 Amplifier
Replies
10
Views
686
Miles Prower
Miles Prower
blackwhaleamp
Peavey 6505+112 Clean Tone not Working
Replies
4
Views
275
blackwhaleamp
blackwhaleamp
andyjevans
What low Rp output tubes, like 1K or under, for a 3.5K SE OPT?
Replies
79
Views
4K
andyjevans
andyjevans
J
New to this schematic question...
Replies
14
Views
598
OldHector
OldHector
A
RCA 9289B
Replies
2
Views
211
ArcheusLedoux
A
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