• 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
B
Chinese EL34/6SN7GT SE Unusual Topology
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73
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7K
batteryman
B
P
EF86 Microphone preamp with solid state follower
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54
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3K
Pacemaker
P
Tubelab_com
Anyone tried the Hammond 1642SE in a BIG SE amp?
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57
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17K
rdf
rdf
M
An interesting McIntosh tale
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10
Views
638
Windcrest77
Windcrest77
mbrennwa
Which DHT tubes for an electrostatic tube amp?
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24
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2K
mbrennwa
mbrennwa
G
GU-81m tube amp schematics???
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193
Views
67K
Zoran
Z
P
Valve preamp identify
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17
Views
1K
Penki76
P
H
Plate choke with center tap as autoformer
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11
Views
637
Hificat
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DamonB
Small tubes with the nicest glow. What is cheap and easy?
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29
Views
2K
wg_ski
W
N
Heathkit GR-21 FM multiplex radio
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10
Views
507
newb2toobs
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kmj
Rebuilt Reel to reel, Help with VU-meters
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8
Views
659
Mooly
Mooly
freddi
How might a 6GM5 do tied as triode?
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29
Views
4K
Marco audio
Marco audio
T
Does anyone use an RCD on the DC Plate HT?
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1
Views
233
euro21
E
SimpleMouse
LOMC Load Values
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6
Views
473
SimpleMouse
SimpleMouse
D
Thanks before I move on over.....for a time.
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0
Views
262
dimwatt
D
G
United Electronics 805 tube dating
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4
Views
360
rayma
rayma
J
two tube amps with same power rating/class/topology, but differing loudness?
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8
Views
421
russc
russc
J
Is this 12BH7 amp cathode biased or fixed biased?
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11
Views
656
6A3sUMMER
6
mbrennwa
Anything wrong with fixed grid bias?
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5
Views
737
jan.didden
jan.didden
P
NYD one bottle preamp questions
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8
Views
525
Positron
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