• 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
L
modifying valve amp with net/single bias trimpot
Replies
35
Views
2K
pblix
pblix
50AE
Simulating a swinging choke / saturating choke
Replies
30
Views
2K
50AE
50AE
D
EL34 PP output transformers
Replies
58
Views
4K
richgwilliams
richgwilliams
J
Darling 1626 Amp
Replies
18
Views
2K
je245
je245
richgwilliams
Vacuum Tube bias for designers
Replies
82
Views
4K
richgwilliams
richgwilliams
D
Audio Research LS1 transformer
Replies
2
Views
250
Depaj
D
Dorin Bodea
IN26 - new hi-level input xfmr 39Vrms out
Replies
1
Views
354
Dorin Bodea
Dorin Bodea
A
Harmon Kardon FA30X
Replies
12
Views
935
huggygood
huggygood
E
Marantz Model5 Amplifiers
Replies
19
Views
708
6A3sUMMER
6
M
Audioromy FU-29 - push pull!
Replies
25
Views
17K
maddmaxxdrummer
M
S
01A question
Replies
729
Views
127K
euro21
E
dubadub
SMPS to run Gu50 heaters? Extra filtering?
Replies
8
Views
413
baudouin0
B
N
Grounded grid preamp voltages
Replies
55
Views
3K
richgwilliams
richgwilliams
jcalvarez
Hybrid bias for output stage
Replies
46
Views
3K
richgwilliams
richgwilliams
B
Saving my Heath AA-32 amplifier or the lack of available 6GW8, ECL86 tubes
Replies
29
Views
2K
Audiomix
A
Windcrest77
Designing a solid state tube?
Replies
61
Views
4K
jcalvarez
jcalvarez
A
Hello from Mexico
Replies
17
Views
700
jcalvarez
jcalvarez
T
803 tube
Replies
12
Views
494
6A3sUMMER
6
N
Transformers and frequency response extremes?
Replies
80
Views
5K
6A3sUMMER
6
T
Zirconium coated Molybdenum, vs Tantalum vs Pyrovac
Replies
8
Views
414
toshiba_nz
T
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