• 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
R
Anyone have the specifications for Leak Stereo 60 mains transformer
Replies
2
Views
347
grovergardner
G
N
Output Transformer Wiring question
Replies
15
Views
1K
nicoch58
nicoch58
solderbrain
Balance and bias voltage unstable
Replies
108
Views
5K
rayma
rayma
rdf
Driver 2nd order distortion inside a feedback loop?
Replies
22
Views
1K
rdf
rdf
S
Speaker impedance match - but 300b
Replies
20
Views
2K
6A3sUMMER
6
ampexperts
Here's a Mystery: Marshall Origin 50 Stuck in Low Power
Replies
3
Views
321
ampexperts
ampexperts
rusty100
Audio Research LS7 recapping - whats going on?
Replies
9
Views
1K
DDzStereo
D
P
What do you make of how this tube tests
Replies
13
Views
689
rayma
rayma
emk2
mixed/fixed bias without low voltage winding available
Replies
7
Views
517
Tom Bavis
Tom Bavis
B
Akido preamp query
Replies
4
Views
494
batteryman
B
dubadub
60Hz hum in this 6DJ8 Headphone Amp I've just built - Poor Layout?
Replies
13
Views
747
grataku
G
R
7193/2C22 to 12AU7 conversion Help?
Replies
30
Views
3K
SilentPoet
S
S
PS Chokes in parallel?
Replies
4
Views
423
andyjevans
andyjevans
solderbrain
Eico ST70 restore - short
Replies
27
Views
859
grovergardner
G
A
Self-shorting spkr output jack?
Replies
19
Views
1K
wg_ski
W
X
old rare 311CT tubes
Replies
0
Views
201
Xpim
X
S
Tubelab. com has more boards!
Replies
0
Views
286
Steve Morley
S
astouffer
388A experiments
Replies
5
Views
475
astouffer
astouffer
D
Little Bear Bx-4 Valve DC offset
Replies
0
Views
222
dj_holmes
D
AKlein
KT88SE - with EL34s
Replies
124
Views
6K
AKlein
AKlein
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