• 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
A
5V filament winding connected to secondary of output transformer?
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23
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1K
egellings
E
Lingwendil
Balanced feedback to individual driver cathodes?
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14
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1K
thisusername
T
M
AliExpress DIY AUDIO NOTE MEI SHU <= Is it worth?
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26
Views
2K
waltube
waltube
S
Audio Research D70 "POP!" on shutdown
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18
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2K
SMOTH
S
N
EL84 PP Output Transformer Recommendations?
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140
Views
14K
Never Get Old
N
djn
Do capacitors go bad if they are not used?
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56
Views
4K
Elvee
Elvee
Tha(t)oneGuy
The Fever Bile eBay 6J1 preamp everyone loves (Smart people pls help!)
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18
Views
1K
Tha(t)oneGuy
Tha(t)oneGuy
claudiomas
Eimac 100TH SE
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22
Views
8K
suwaned
suwaned
revintage
PP with Rod Coleman CCS heater regulators
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36
Views
2K
waltube
waltube
eldarvanyar
RH84 V2 capacitors - help choosing Rubycon LLE, Nichicon FZ, FZ, Kemet PEG124
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8
Views
1K
eldarvanyar
eldarvanyar
N
Help with modifying cold cathode on guitar amp
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10
Views
922
6A3sUMMER
6
eldarvanyar
Sony TC-200 R2R Transformers
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9
Views
1K
FlaCharlie
F
L
SE SV-811-10 power supply
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67
Views
17K
mgfisher400
M
W
  • Poll Poll
Circuit choices for sub output - stay with original intent, or….?
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0
Views
192
wg_ski
W
C
Can I mod an unbalanced design to make it balanced?
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21
Views
1K
egellings
E
S
Oddball filament voltage
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25
Views
1K
SCD
S
B
Kappler phase inverter
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8
Views
977
jhstewart9
jhstewart9
D
Strange soft-clipping artifact in waveform
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8
Views
774
dtbradio
D
Sorin Cristea
GK-71 anode cap - suggestion?
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12
Views
1K
Marco audio
Marco audio
S
6LU8 SE
Replies
16
Views
1K
SCD
S
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