• 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
L
Foolproof Fixed BIAS Simulator with LTSpice for PP
Replies
4
Views
192
lcsaszar
lcsaszar
M
Hybrid Cascode with Direct Heated Tube
Replies
5
Views
319
Marik
M
F
ECC81/300B Push Pull Amp
Replies
8
Views
421
fossa
F
jcalvarez
Strange input stage/phase inverter
Replies
13
Views
316
PRR
PRR
L
Q: KT88 PP UL+CFB: Switching Fixed -> Cathode BIAS
Replies
3
Views
225
6A3sUMMER
6
L
Q: Measuring Frequency Response of PP Output Transformer
Replies
126
Views
3K
ISCMMS
I
nigelwright7557
Tube/valve availability.
Replies
35
Views
2K
mdpaudio
M
S
Audio League Report, Volumes 1 and 2 (1954)
Replies
1
Views
145
rayma
R
lavane
SE 6K6 guitar amplifier schematic wanted.
Replies
11
Views
474
lavane
lavane
M
Coleman regs on IDHT
Replies
8
Views
608
euro21
E
VOB
807 PP with 8k primary imp OPT?
Replies
61
Views
995
huggygood
huggygood
Windcrest77
What is a kenotron?
Replies
8
Views
383
PRR
PRR
e_fortier
Recommandation for PP about 30-40W with 4K OPT w/o UL.
Replies
39
Views
1K
6A3sUMMER
6
E
Transformer distortion (THD)
Replies
136
Views
7K
tubes4all
T
C
16C-B28 Sweep tube data?
Replies
4
Views
111
smoking-amp
smoking-amp
Randy Bassinga
300B early distortion desired
Replies
4
Views
319
kmtang
kmtang
R
Roth Audio Music Cocoon MC4
Replies
8
Views
2K
RS232
R
rongon
Parallel-NFB Push-Pull 6L6 Amplifier Idea - Please criticize it!
Replies
54
Views
1K
rongon
rongon
H
Using Choke in Choke Input Power Supply ?
Replies
34
Views
7K
jhstewart9
jhstewart9
stephe
Boyuurange A50 300B Review + Mods Series
Replies
54
Views
10K
stephe
stephe
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