• 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
P
Knight KN-3050 amplifier meter rectifier
Replies
4
Views
205
podbaydoors
P
M
My custom tube preamp - Full build advice
Replies
85
Views
6K
mr_zener
M
M
Correct sequencing for plate voltage and filament bias in a 12AU7 tube power supply
Replies
4
Views
195
artosalo
artosalo
P
Audio Research VSi60
Replies
6
Views
273
petrnyc
P
E
Output transformer core, how much is too much?
Replies
11
Views
680
sajadho1988
sajadho1988
J
OTL monoblock hum / buzz problem
Replies
0
Views
80
Jussisan
J
Soundhappy
Gold mine of DI¥ audio tubes schematics from Japan
Replies
747
Views
244K
tamra
tamra
Windcrest77
Hamvention Dayton OH anyone?
Replies
13
Views
1K
Tubelab_com
Tubelab_com
H
D3a triode operating point data
Replies
6
Views
452
Hearinspace
H
wparks
Why would an amp designer intentionally use different OPT impedances for Left vs. Right?
Replies
22
Views
741
MarekH
M
A
Air Tight M101 schematic?
Replies
27
Views
2K
hooman
hooman
V
MF nuVista M3 Refresh
Replies
8
Views
1K
Steve Morley
S
eclipsevl
Cheap EL34 Ali kit conversion to 300B amplifier
Replies
5
Views
384
andyjevans
andyjevans
waltube
Single Ended Double Tap Ultralinear Transformer + Schade config. tests
Replies
60
Views
3K
waltube
waltube
waltube
300B OT nano, first test
Replies
144
Views
9K
waltube
waltube
B
Power Transformer Question
Replies
8
Views
254
rayma
rayma
S
Sound Valves M40 Mono amplifiers (Dynaco ST70 circuit)
Replies
27
Views
1K
petertub
petertub
P
JFET follower, anyone ?
Replies
2
Views
353
Merlinb
Merlinb
oemcar
Next Project
Replies
3
Views
298
jcalvarez
jcalvarez
A
Thought I was crazy: GSM noise from Yaqin MC-10T
Replies
9
Views
311
AlanInSitges
A
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