• 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
F
Graaf GM20 6C33
Replies
13
Views
5K
as_audio
A
noisyneighbour
Cathode bypass cap question, power or preamp?
Replies
5
Views
402
Michael C
M
D
Refurbishing a 1960’s Nordmende Casino Console
Replies
10
Views
559
DuRWooDJBL
D
R
Cathode bypass cap question
Replies
20
Views
517
AllenB
AllenB
edwardjurich
Gavitt Shielded Wire
Replies
10
Views
514
edwardjurich
edwardjurich
revintage
Autoformer or transformer PI
Replies
34
Views
1K
revintage
revintage
VMUNIX
ECC40 instead of ECC83 rimlock valves build
Replies
36
Views
11K
Fedeskyz
Fedeskyz
M
Polyester metallized film cap vs polypropylene metallized film cap
Replies
86
Views
8K
Positron
P
U
Counterpoint SA-11 Manual, Schematic?
Replies
2
Views
191
VivaVee
VivaVee
N
low voltage low current tube rectification
Replies
3
Views
301
stocktrader200
S
revintage
New take on the iron Concertina
Replies
22
Views
747
smoking-amp
smoking-amp
gerrittube
Measure final tube’s noise
Replies
11
Views
421
gerrittube
gerrittube
C
Williamson first stage question
Replies
233
Views
13K
catalin gramada
C
jcalvarez
Valve base extenders
Replies
1
Views
215
huggygood
huggygood
M
Low microphonics preamp tubes
Replies
11
Views
2K
hooman
hooman
grahamfocal
New source selector repair on my amp required.
Replies
0
Views
111
grahamfocal
grahamfocal
R
KT120 PPP Issues/Improvements
Replies
41
Views
3K
gabdx
G
W
Continuing saga with my 6L6 build - Global feedback to a Floating Paraphase front end
Replies
0
Views
279
wstein25
W
xusheng
The load impedance of the push-pull structure electronic tube amplifier screen remains constant
Replies
18
Views
616
gorgon53
G
T
Is anyone using the AC2/HL indirectly heated triode
Replies
1
Views
174
andyjevans
andyjevans
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