• 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
I
LTspice hierarchical ultralinear OPT
Replies
39
Views
7K
Ite
I
hooman
Where does the hum com?
Replies
39
Views
1K
hooman
hooman
SpreadSpectrum
Winding my own output transformers...dumb idea?
Replies
211
Views
19K
ilorev
I
J
2A3 Loftin White (ish) Voltage
Replies
19
Views
623
soulmerchant
soulmerchant
Joe Rasmussen
Upgrading Vacuum State FVP FVP-5 Tube Line Stage to FVP-6
Replies
84
Views
11K
Fidelius
Fidelius
T
  • Locked
Telefunken RE0741 neutro with Nazi Swastika
Replies
52
Views
2K
anatech
anatech
lineup
6AS7 OTL Headphone Amplifier
Replies
11
Views
601
artosalo
artosalo
Adrian Immler
HSPY 400-01 strikes - how to repair it?
Replies
4
Views
1K
Adrian Immler
Adrian Immler
lineup
6AS7 How do you heat this tube?
Replies
9
Views
569
Hilumine
H
K
Best sounding version EL84/6BQ5?
Replies
42
Views
2K
Kashtan
K
ggetzoff
RH84 with Type 80 build and review
Replies
30
Views
8K
Bas Horneman
Bas Horneman
J
Papworth (Mentmore / M&A) M200 bias setting / schematic
Replies
25
Views
934
as_audio
A
D
6S19P Push Pull Build
Replies
44
Views
5K
kb2wyl
K
noisyneighbour
HELP 2nd amp build: Adapting a schematic to the components i already have
Replies
30
Views
1K
Tom Bavis
Tom Bavis
I
EL34 push-pull
Replies
59
Views
3K
nauta
N
Haze Head
First build, EL84 quality control?
Replies
39
Views
1K
Haze Head
Haze Head
dubadub
I've been Grounding wrong this whole time. How do you connect your Signal Returns to the Chassis?
Replies
16
Views
985
schiirrn
S
grahamfocal
TKD pot upgrade
Replies
13
Views
767
K.A.B
K.A.B
Kay Pirinha
Unusual designs in the Audio Research SP10 peramplifier
Replies
4
Views
405
grataku
G
hooman
EI E88CC...
Replies
89
Views
6K
gupsta
G
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