• 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
Fsatsil
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Best EL84pp kit??
Replies
41
Views
13K
nightanole
N
807tubenut
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Looking for PP 7027a shematic
Replies
1
Views
1K
Eli Duttman
E
C
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power supply reassignment problem
Replies
44
Views
4K
20to20
2
S
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Confused with designing
Replies
6
Views
1K
Globulator
Globulator
mobyd
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SEDHT amp - decisions decisions
Replies
1
Views
1K
djn
djn
A
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Need guidance with heathkit SA-2 refurbish/mods
Replies
9
Views
5K
Eli Duttman
E
E
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Tube Square-Law, what and how to set up?
Replies
9
Views
2K
kenpeter
K
D
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Another silly tube yesting question
Replies
3
Views
1K
dperry
D
A
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Hi-end definitive vacuum tube phono pre
Replies
65
Views
19K
Allen Wright
A
S
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Ideas for a simple 6080/6AS7 Push-Pull amplifier
Replies
29
Views
29K
kenpeter
K
B
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SRPP power using power tranny as OPT?
Replies
18
Views
5K
aardvarkash10
aardvarkash10
807tubenut
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Need help finding schematic. Conn 720
Replies
0
Views
2K
807tubenut
807tubenut
C
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st70 standby switch/cathode stripping SS rect
Replies
74
Views
10K
M Gregg
M Gregg
A
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OPT for parafeed SE
Replies
4
Views
2K
kevinkr
kevinkr
M
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Finished K-12 Kit with cedar / brass chassis (pics)
Replies
15
Views
3K
Maxwell Smart
M
A
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Preamp Conord´s with some malfunctioning
Replies
14
Views
2K
aguantesoda
A
rsumperl
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Initial 'DQ5' testing
Replies
14
Views
3K
flacoman
F
M
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Mains power transformer on S5 K-12 kit hums?
Replies
2
Views
1K
Maxwell Smart
M
IG81
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Signal transformer question
Replies
62
Views
9K
IG81
IG81
rsumperl
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Any thoughts on this transformer on eBay?
Replies
9
Views
2K
Ian444
I
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