• 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
bst
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Capacitors in series for coupling?
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11
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4K
indianajo
indianajo
F
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balanced tube preamp
Replies
29
Views
25K
hidnplayr
hidnplayr
G
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6DJ8 tube schematic as balanced line stage?
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1
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4K
Gordy
G
A
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Knight amp circut voltages
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1
Views
1K
SY
SY
hidnplayr
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What tube is this?
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3
Views
1K
hidnplayr
hidnplayr
G
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6DJ8 (balanced) tube line stage
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1
Views
2K
gaborbela
G
E
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Yet another passive attenuator
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0
Views
2K
eam
E
Big John
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El Cheapo ok for a first build?
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6
Views
3K
Big John
Big John
O
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Output transformers... which one...?
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4
Views
4K
rknize
rknize
jackinnj
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The soul of a new "electrostatic" machine
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5
Views
2K
jackinnj
jackinnj
M
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Wire construction for capped tube plates
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16
Views
3K
Shoog
Shoog
emk2
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Faulty 5881 tube ?
Replies
11
Views
4K
MellowTone
MellowTone
B
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Grid resistor location
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4
Views
4K
m6tt
M
N
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Jean Hiraga SE KT88
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9
Views
9K
rumad
R
Pyre
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Just finished testing my first 832A amp
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44
Views
25K
rparsh
R
Z
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microwave oven transformer..
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20
Views
14K
SGregory
SGregory
N
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Japanese OPTs
Replies
47
Views
16K
nicoch58
nicoch58
M
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MF Xpre - help pls!!
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0
Views
1K
Muzear
M
SY
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SY gets jiggy (5692 measurements)
Replies
31
Views
8K
Majestic
Majestic
SDB777
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How many watts are really needed?
Replies
38
Views
10K
Jaime
Jaime
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