• 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
G
Single Ended KT66 / KT88 6550 Triode Strapped & Ultra Linear
Replies
20
Views
1K
Grid01
G
aleatorylamp
QUAD II mono amp/control unit/tuner (old model-1960)
Replies
72
Views
1K
aleatorylamp
aleatorylamp
1973bronco
SP-14
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42
Views
1K
grovergardner
G
andyjevans
Low Rp tube for line stage - ideas?
Replies
187
Views
14K
FlaCharlie
F
C
Preamp LT1085/LM317 heat question
Replies
18
Views
503
jean-paul
jean-paul
Sorin Cristea
1616 or 3B28 HV rectifiers?
Replies
19
Views
564
daqvin_carter
D
M
Gain reduction
Replies
30
Views
833
mr ed
M
J
My Croft super micro schematic
Replies
9
Views
820
jpk73
J
tonescout
Cooling resistors question
Replies
10
Views
739
tonescout
tonescout
A
Highly Regulated UTC LS-65 UL Amplifier
Replies
9
Views
405
ArcheusLedoux
A
J
Add a switch and circuit to change between ultra-linear and triode mode in a Dynavox VR 70 E II.
Replies
0
Views
108
Jazzmi
J
FrankieS
Variac as 'soft start'
Replies
4
Views
269
wg_ski
W
pmillett
EL84 "Engineer's Amp" (sort of)
Replies
18
Views
1K
Tubelab_com
Tubelab_com
S
EAR834 Clone Zener Diode Temperature Hot ?
Replies
0
Views
110
Scott Muni
S
D
Recommendations for PP EL84 circuits
Replies
95
Views
14K
Adolf Corkscrew
A
stephe
Mods to "Little Bear" phono-preamp
Replies
95
Views
9K
MrPeach71
M
R
Noob Power transformer question
Replies
44
Views
1K
Midnightmayhem
M
R
Help needed to determine if a 2 prong polarized or 3 prong IEC should be a replacement
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17
Views
469
riven67
R
N
6SN7 driving EL34PSE
Replies
11
Views
474
soulmerchant
soulmerchant
dubadub
Poor bass response from a Dynaco EL84 PP amp. Wrong OTs?
Replies
20
Views
645
dubadub
dubadub
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