• 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
Carnhill made Sowters
Replies
81
Views
11K
gupsta
G
T
Cascode CCS for Cathode Follower
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11
Views
620
euro21
E
piecor
A circuit without a cathode resistor?
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25
Views
1K
Wavebourn
Wavebourn
M
Mystery 6SL7GT
Replies
13
Views
525
ceylon.mooney
C
N
Sansui output transformers
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61
Views
2K
niznai
N
Windcrest77
Newby question: Hybrid bridge rectifier
Replies
7
Views
428
Tubelab_com
Tubelab_com
P
Marantz Model 9 - Restoration resistor choice
Replies
27
Views
948
Pegasus123
P
tonescout
Help on single ended 211 question
Replies
6
Views
415
vinylkid58
vinylkid58
Nemeske
Ibanez TSA15 head retubing and setting the correct bias
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3
Views
148
Nemeske
Nemeske
tonescout
How stable should DC anode voltages really be?
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43
Views
4K
tonescout
tonescout
B
Is dynakitparts still shipping product
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14
Views
678
jxdking
J
elac310
Output transformers from China: understanding the market
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48
Views
3K
ceylon.mooney
C
K
Filament CCS for DHTs with automatic adjustment
Replies
46
Views
4K
KoitoYuu
K
artosalo
Simple AB2 PP-amplifier with OP-amp driver
Replies
35
Views
5K
matejsirk
M
Ciro82
Hybrid P3A - Tube differential input stage - ECC88
Replies
4
Views
891
Ciro82
Ciro82
K
Have you ever seen this done to a MkIII?
Replies
31
Views
2K
egellings
E
J
Gemtune APPJPA0901A updates
Replies
0
Views
84
Joetiii
J
W
Harmonics for PSE DHT Amplifiers
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20
Views
710
jan.didden
jan.didden
E
Oscillation with cathode feedback
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25
Views
3K
gabdx
G
M
Dynaco ST-35 question
Replies
24
Views
5K
jxdking
J
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