• 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
GeirW
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Tube equalents.
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3
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1K
SY
SY
serengetiplains
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Western Electric 300B
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4
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4K
newkirklabs
N
A
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Big valve
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31
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7K
Giaime
Giaime
H
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Suitable Transformer for Etude 12B4A
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5
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3K
resident
resident
GeirW
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PAS phono. (curcio)
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5
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3K
GeirW
GeirW
powertriode
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SE PX4 or PX25 amp, anyone built one????????
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6
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4K
analog_sa
analog_sa
B
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bias voltage for 6BQ5 plate
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3
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5K
briansdad
B
A
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Single Stage Inverting or no?
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7
Views
2K
azira
A
ray_moth
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Balancing DC-coupled differential stages
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11
Views
6K
ray_moth
ray_moth
G
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Modifying (Reducing) Screen Voltage
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1
Views
2K
Sch3mat1c
Sch3mat1c
V
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Bridging
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3
Views
2K
Sch3mat1c
Sch3mat1c
Fuling
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Need help with PP pentode design
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13
Views
3K
Fuling
Fuling
O
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neophyte - transformer potting
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13
Views
9K
NickC
N
E
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Stage classification and efficiency
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11
Views
2K
Sch3mat1c
Sch3mat1c
andyjevans
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What PP circuit to use for 6SN7 and 2a3?
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4
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3K
Brett
Brett
T
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Eventual 300B advice welcome!
Replies
37
Views
13K
lt cdr data
L
serengetiplains
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10-15 mu DHT?
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8
Views
3K
jrdmedford
J
W
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EL34 Push Pull weirdness
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32
Views
10K
Sch3mat1c
Sch3mat1c
Trout
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Cunningham CX 301A
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11
Views
8K
Brett
Brett
J
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Help needed with preamp.
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15
Views
4K
JohanH
J
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