• 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
M
Sylvania 520 tube tester
Replies
3
Views
432
mdpaudio
M
B
Duo Vac, New Chinese tube tester?
Replies
19
Views
5K
huggygood
huggygood
b_force
Super simple heater/filament and HT/B+ switcher
Replies
5
Views
593
b_force
b_force
R
Old transformer ID
Replies
4
Views
2K
trobbins
trobbins
Miniwatt
Choke current rating
Replies
8
Views
608
trobbins
trobbins
N
300B Board Layout question
Replies
22
Views
1K
rayma
rayma
D
Spice Models
Replies
10
Views
729
baudouin0
B
legarem
Searching B9D magnoval high quality sockets for EL519/EL509/6P45S
Replies
1
Views
321
JonSnell Electronic
JonSnell Electronic
S
Estimating inductance per turn
Replies
26
Views
2K
MuzicalMatt
MuzicalMatt
R
Electrohome PA-300 question
Replies
2
Views
301
rockdoc
R
B
EF80/6BX6 glow on power up
Replies
10
Views
569
baudouin0
B
P
Subminiature tubes/valves for Hi-FI
Replies
65
Views
4K
pcardoso73
P
ChuckORWC
Ditching the balance pot in Bottlehead Smash
Replies
4
Views
478
6A3sUMMER
6
J
Opinions sought: Broskie's Aikido vs. CCDA line stages
Replies
16
Views
2K
rongon
rongon
T
Aikido Noval Stereo vs 9 pin dual mono
Replies
1
Views
435
Alashikata
A
P
SEPP output transformer
Replies
13
Views
4K
Depanatoru
D
doctor underhill
anyone able to decipher a 539 Sylvania date code?
Replies
4
Views
620
Tom Bavis
Tom Bavis
G
300B 'Perque' driver
Replies
2
Views
493
grataku
G
P
PT and OT in close proximity
Replies
41
Views
3K
6A3sUMMER
6
W
Musings on the design of “the big one(s)”
Replies
25
Views
1K
Fuling
Fuling
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