• 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
T
Hum pot implementation on 2a3
Replies
23
Views
5K
Bigun
Bigun
stenak
From triode wired to pentode wired
Replies
8
Views
1K
stenak
stenak
Miniwatt
"Schade" feedback and triode connection
Replies
19
Views
2K
6A3sUMMER
6
B
Tube plate dissipation vs power output
Replies
89
Views
7K
45
4
rongon
For RIAA preamp: Large value caps vs. Regulated/Stabilized PSU
Replies
301
Views
27K
Marco audio
Marco audio
tonescout
Strange 'tick' or 'spark' noise on power up of valve pre amp - any ideas what it could be [it's not the valves noise]
Replies
33
Views
2K
Diabolical Artificer
Diabolical Artificer
F
CRC with more resistance than CLC
Replies
34
Views
2K
67339
6
F
DIY tube equipment from Ukraine
Replies
8
Views
1K
50AE
50AE
Diabolical Artificer
Coupling cap choice
Replies
11
Views
2K
tubelectron
tubelectron
bloozestringer
Tube preamp remote volume/selector
Replies
0
Views
357
bloozestringer
bloozestringer
R
Cheaper substitute for Lundahl LL1671
Replies
17
Views
2K
robyrenny
R
G
6336a
Replies
23
Views
13K
bondini
bondini
SoaDMTGguy
Trying to work out the function of tubes for purposes of tube rolling
Replies
63
Views
3K
Windcrest77
Windcrest77
H
Aiyima TUBE-A3
Replies
16
Views
5K
HaiderGill
H
G
Copland CTA 405 bias adjustment
Replies
2
Views
643
Gatto55
G
T
Russian UHF amplifier tubes
Replies
33
Views
11K
Studley
S
bondini
6KT8 pin-out - pentode G3 tied to heater
Replies
7
Views
830
Tubelab_com
Tubelab_com
rhthatcher
Tube MC Phono Stage - RIAA Calculator / Formula Help?
Replies
40
Views
4K
rhthatcher
rhthatcher
W
Resistor used for measuring bias keeps failing -- what can I do?
Replies
62
Views
4K
TonyTecson
TonyTecson
djn
I can’t find a wire description for this transformer
Replies
5
Views
357
djn
djn
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