Audio Project Amplifier Speaker Loudspeaker Kit
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Tubes - Showing threads 9201 to 9400 of 11907 available
Tweeks on tubes - bring out the demagnetiserss07-31-2004 07:19 AM - 36 replies
Absolute. Best. Chassis. Ever.07-29-2004 05:58 PM - 23 replies
Zout adapted for 2 EL34 80W Va=560V07-29-2004 04:37 PM - 2 replies
load line - truth or fiction07-29-2004 03:34 AM - 4 replies
Best place to place bleeder resistor in a power supply?07-29-2004 01:13 AM - 13 replies
Pretty Tubes07-28-2004 06:59 PM - 4 replies
Preamp: Foreplay or 5687 or 12B407-28-2004 04:17 PM - 24 replies
want to make otl with 6 tung-sol 6336a07-28-2004 04:02 PM - 9 replies
6L6'S vs EL34's07-28-2004 10:26 AM - 8 replies
Creating a headphone amp out of existing 2A3 amp07-28-2004 05:32 AM - 9 replies
What can you tell me about Halldorson transformers07-28-2004 01:44 AM - 5 replies
Mu follower, headphone amp?07-27-2004 02:20 PM - 6 replies
CROFT OTL (APPARITION MODEL) Schematics07-27-2004 01:17 PM - 2 replies
Is there a 'Gainclone' Of the tube world?07-27-2004 03:24 AM - 28 replies
Line Amp Design review07-27-2004 12:59 AM - 14 replies
Looking for a very special project07-27-2004 12:47 AM - 8 replies
Designing a LC power supply07-26-2004 07:22 PM - 5 replies
psu caps07-26-2004 07:05 PM - 8 replies
Easiest CAD to learn to layout my chassis?07-26-2004 05:43 AM - 5 replies
newbie asks question :cathode biasing07-26-2004 03:42 AM - 9 replies
mr. pimm's ccs rev.3?07-25-2004 08:25 PM - 9 replies
Audio Research LS22 - Looking for schematics07-25-2004 07:23 PM - 0 replies
Beard P10007-25-2004 03:33 PM - 12 replies
shunt regulation??07-25-2004 02:05 AM - 4 replies
Vitamin Q VS Jensen07-24-2004 10:08 PM - 2 replies
Mystery Russian tube logo ?07-24-2004 07:33 PM - 4 replies
Counterpoint SA-7 Schematic07-24-2004 06:24 PM - 27 replies
Dual rectification off single sencondary transformer question07-24-2004 06:09 PM - 7 replies
Night dreaming? / Middle of the night bloom07-24-2004 03:20 PM - 54 replies
Which preamp to choose for my ECC88s?07-23-2004 06:36 PM - 13 replies
looking for morgan jones phono amp schematic07-23-2004 07:20 AM - 2 replies
Amp for a beginner07-23-2004 03:42 AM - 10 replies
Question about direct coupling a anode follower into a cathode follower.07-23-2004 01:25 AM - 45 replies
On Line Tube Learning for newbies....07-22-2004 07:49 PM - 92 replies
EL34 Vs. EL84.......07-22-2004 07:00 PM - 1 reply
New DHT heater07-22-2004 08:21 AM - 58 replies
A Career in Tube Audio?07-22-2004 07:31 AM - 12 replies
Xicon Polypropylene Cap for Valve Amp07-22-2004 07:30 AM - 0 replies
ECC99 Heater / Cathode Max Volt07-22-2004 01:59 AM - 5 replies
Replacing Tubes07-21-2004 03:31 PM - 1 reply
schematics wanted please07-21-2004 03:02 PM - 3 replies
MCUTracer -- the missing code07-21-2004 02:05 PM - 0 replies
How do you double the voltage on a PSU?07-21-2004 12:16 AM - 17 replies
EL34 tubes to Proboi M50 amp07-20-2004 12:35 PM - 3 replies
ATH-W1000 headphones need amplifier07-20-2004 09:08 AM - 3 replies
g. pimm's rev3. and rev. 4 -6P1P/5687 ???07-18-2004 03:26 PM - 3 replies
DIY Power Brake?07-18-2004 02:43 PM - 12 replies
New EL84 SE schemat.07-17-2004 11:48 PM - 1 reply
32 NOS RCA 1644 (12L6-GT) Twin Pentode tubes07-17-2004 01:05 PM - 7 replies
reducing hum07-17-2004 11:18 AM - 5 replies
Lafayette LA-22407-17-2004 10:59 AM - 3 replies
Comments on RSD Tubes07-17-2004 03:53 AM - 1 reply
Tube heatsink07-16-2004 07:27 PM - 1 reply
wondering about direction07-16-2004 05:42 PM - 1 reply
An Ultra -linear question07-16-2004 01:59 PM - 5 replies
5687 Preamp as I plan to build it.07-15-2004 10:52 PM - 33 replies
Hoekstra DC-Coupled 300B ... oooooh!07-15-2004 08:49 PM - 11 replies
5687_6n1p_6p1p_gary pimm07-15-2004 08:26 PM - 2 replies
How lucky are we? TJ type 50 triode to be made. Make your preferences known now!07-15-2004 02:25 PM - 3 replies
Biasing DC heaters07-15-2004 10:55 AM - 6 replies
EL34 SE amp schematics07-15-2004 07:35 AM - 8 replies
Negative Voltage with Tube Rectification?07-15-2004 06:52 AM - 7 replies
Tube Amp on eBay07-14-2004 09:33 PM - 20 replies
Headphone amp with 6P41S07-14-2004 08:09 PM - 4 replies
Experiences with White CF/CCS CF output stage07-14-2004 01:38 PM - 50 replies
Holes in the anode plate?07-14-2004 08:21 AM - 2 replies
5687 pre?07-14-2004 07:43 AM - 13 replies
tube design literature07-14-2004 12:11 AM - 4 replies
Trace Elliott schematic07-13-2004 01:50 PM - 1 reply
tube choice?07-13-2004 01:47 PM - 3 replies
Choke identity07-13-2004 01:44 PM - 1 reply
spotted this on ebay - 700w triodes anyone?07-13-2004 10:26 AM - 8 replies
HELP!!! for tube lovers07-13-2004 09:08 AM - 7 replies
How do you properly ground a Tamura OPT?07-13-2004 05:03 AM - 2 replies
Akihabara shopping07-13-2004 02:41 AM - 12 replies
Might be interested in this distortion thread07-13-2004 02:06 AM - 9 replies
PSE Active Loaded 12B4A anyone?07-12-2004 09:51 PM - 12 replies
Set 6080/6as707-12-2004 06:11 AM - 34 replies
solid state just isn't doing it for me!!07-12-2004 03:28 AM - 9 replies
Where can I use this tubes07-11-2004 08:05 PM - 12 replies
Interesting math conundrum.07-11-2004 05:00 PM - 8 replies
schematic from this amp 45/717a/5u4..07-11-2004 11:40 AM - 4 replies
Strange Tube07-11-2004 11:27 AM - 11 replies
power supply help!!!!07-10-2004 05:33 PM - 1 reply
se tubeamp with px407-10-2004 04:18 PM - 1 reply
Fixed bias PP questions07-10-2004 09:04 AM - 1 reply
Identifying Eico transformers07-10-2004 12:54 AM - 0 replies
metal shield07-09-2004 10:10 PM - 3 replies
why multi pins ?07-09-2004 06:43 PM - 9 replies
2A3 PSE 'Arcadia' by SJS, or sorta07-09-2004 06:34 PM - 2 replies
John Swenson's (In my eyes revolutionary) preamp!07-09-2004 03:13 PM - 49 replies
tube opamps07-09-2004 02:24 AM - 9 replies
Help please with rare tube cd player07-08-2004 10:46 PM - 22 replies
OT impedance problem07-08-2004 08:41 PM - 2 replies
Amperex 6DJ807-08-2004 07:45 PM - 8 replies
tiny amp07-08-2004 06:25 PM - 6 replies
6C33 Internal Impedance (rp)?07-08-2004 04:57 PM - 8 replies
guitar preamp07-08-2004 03:19 PM - 8 replies
increasing o/p impedance to match IT??07-08-2004 02:24 PM - 3 replies
Grundig TK-60 Reel to Reel Questions07-08-2004 01:08 PM - 1 reply
Michaelson and Austin Oddysee07-08-2004 02:15 AM - 16 replies
6gk6 tubes07-08-2004 01:47 AM - 2 replies
Anyone know anything about a 6AV5GA?07-07-2004 11:14 PM - 42 replies
A safe (?) DC coupled amp07-07-2004 09:47 PM - 4 replies
amp in trouble07-07-2004 09:35 PM - 22 replies
how to calculate lower operating point?07-07-2004 06:09 AM - 11 replies
Anyone on the tube forum ever heard a Bride Of Zen preamp?07-06-2004 09:41 PM - 7 replies
Audio Innovations 800 mk107-06-2004 09:03 PM - 0 replies
Field of Dreams (a pair of FRT502 modulators)07-06-2004 04:50 PM - 6 replies
cathode follower07-06-2004 01:46 PM - 2 replies
ECC808- what is it more like?07-06-2004 08:35 AM - 7 replies
Help needed to find these rare values!07-06-2004 08:19 AM - 43 replies
New PP amp just completed - a few unusual features (long)07-06-2004 08:00 AM - 4 replies
MKP VS Electrolyte07-06-2004 01:58 AM - 9 replies
is 5mA too low???07-06-2004 12:47 AM - 11 replies
Dynaco FM3 220v-120v07-05-2004 09:27 PM - 7 replies
does plate current/voltage effect tube sound????07-05-2004 04:54 PM - 10 replies
Any opinions on the ECC81?07-05-2004 04:41 PM - 6 replies
#26 line stage help07-05-2004 04:22 PM - 4 replies
coupling caps? RTX vs Jupiter wax07-05-2004 04:18 PM - 6 replies
MC275 Hum Conundrum07-04-2004 10:41 PM - 0 replies
We91a07-04-2004 08:47 PM - 36 replies
Is 50 degrees C too hot?07-04-2004 04:36 PM - 4 replies
Using LEDs to bias grid voltage?07-04-2004 01:39 PM - 12 replies
DIY Hybride amplifiers07-04-2004 07:00 AM - 21 replies
wa i popped a tube lol07-04-2004 03:47 AM - 11 replies
6C33C substitute07-03-2004 06:21 PM - 5 replies
Resistor popped...need help for replacement in Yaqin amp07-03-2004 05:26 PM - 8 replies
Check this eye candy out....07-03-2004 02:39 PM - 2 replies
Russian 5U4GB07-03-2004 01:31 PM - 5 replies
simple phono preamp circuit needed07-03-2004 01:20 AM - 4 replies
Black gate PS capacitors07-02-2004 04:52 PM - 12 replies
amp troubles07-02-2004 04:15 PM - 5 replies
Instruments Of Amplification - DIY07-02-2004 04:14 PM - 3 replies
my EL84 pre-amp with schematic07-02-2004 03:33 PM - 3 replies
Hammond AO29 to guitar amp?07-02-2004 12:28 PM - 1 reply
Radical (insane) PSU ideas07-02-2004 11:52 AM - 21 replies
First Tube Amp Considerations...07-02-2004 03:16 AM - 41 replies
hardcore tube night light?07-02-2004 02:58 AM - 4 replies
Frankenstein tube amp07-01-2004 09:33 PM - 6 replies
Can I use this tube?07-01-2004 07:36 PM - 3 replies
help for DHT bias in PP07-01-2004 06:15 PM - 2 replies
Multiple projects07-01-2004 05:06 PM - 11 replies
recommend operating point for EL84?07-01-2004 04:27 PM - 6 replies
First time builder, need advice.07-01-2004 03:52 PM - 26 replies
Tube Depot...07-01-2004 09:40 AM - 2 replies
schematics07-01-2004 05:05 AM - 6 replies
BOGEN MX60A Schematic07-01-2004 03:40 AM - 7 replies
Help with 1626 PSE Amp needed06-30-2004 10:32 PM - 3 replies
OTL question.06-30-2004 02:41 PM - 2 replies
diy tube amp06-30-2004 02:32 PM - 10 replies
Load line for CF06-30-2004 02:10 PM - 4 replies
DIY Vacuum tube amp06-30-2004 01:35 PM - 2 replies
Hammond or James OPT for SE 300B ?06-30-2004 12:09 PM - 25 replies
PSE 6550 schematic needed06-30-2004 10:20 AM - 7 replies
Schematic for Siemens "Table" Amplifier06-29-2004 11:51 PM - 0 replies
power supply for 6922 mu follower06-29-2004 08:18 PM - 5 replies
Dead simple tube circuit06-29-2004 08:16 PM - 1 reply
Any info on a Musical Fidelity X-Pre?06-29-2004 05:42 PM - 0 replies
Autoformer CF amp06-29-2004 04:19 PM - 11 replies
2a3 or otl on an fullrange coral06-29-2004 01:38 PM - 5 replies
My New Project Completed06-29-2004 01:04 PM - 7 replies
SE el8406-28-2004 03:14 PM - 10 replies
Many thanks!06-28-2004 03:14 PM - 0 replies
can i use this circuit as headphone amp?06-28-2004 08:52 AM - 1 reply
Switching power supply & filament06-28-2004 07:37 AM - 2 replies
tube phono amp req'd06-27-2004 02:55 PM - 28 replies
Had a strange problem today...06-27-2004 04:17 AM - 2 replies
wsw siemens ultralinear 815 410 G !!?!06-26-2004 05:22 PM - 6 replies
Bottlehead Gear06-25-2004 04:16 PM - 6 replies
Amp, Stange temporary buzz, what is that?06-25-2004 03:09 PM - 5 replies
2a3 schematic06-25-2004 11:42 AM - 2 replies
NEWBIE needs help-static in one channel of preamp06-25-2004 03:51 AM - 5 replies
Vintage speaker screw outs to 1/4" plug06-25-2004 03:41 AM - 1 reply
Flashing EL3406-24-2004 06:48 PM - 31 replies
Sovtek 2A3 tolerances / defected tube?06-24-2004 07:11 AM - 5 replies
Massive Parallel Operating06-23-2004 06:48 PM - 40 replies
filter circuit for 866a06-23-2004 06:14 PM - 3 replies
reasonable powered simple amp06-23-2004 05:28 PM - 6 replies
6c19pi ?06-23-2004 11:34 AM - 1 reply
S5 Electronics 139 $ tube amp06-23-2004 11:25 AM - 4 replies
12AU7 or 12AT7 instead of 12AX7 ?06-23-2004 09:41 AM - 5 replies
Tube Pre-Amp < $20006-22-2004 10:46 PM - 12 replies
Modification of 2A3 SE Circuit06-22-2004 01:20 PM - 5 replies
beta followers06-22-2004 10:10 AM - 16 replies
Q: Stereo Amp / Dual PS Chokes06-21-2004 04:01 PM - 6 replies
using Mosfets as diode in PS06-21-2004 03:10 PM - 5 replies
Sonic Frontiers Power 2SE06-21-2004 09:33 AM - 1 reply
Curcio daniel06-21-2004 03:41 AM - 2 replies
Ecc89 / Ecc18906-20-2004 11:27 PM - 10 replies
Magnavox06-20-2004 09:51 PM - 9 replies
Tube Preamp 'Clone' PCB copys on ebay (Marantz, McIntosh, etc)06-20-2004 03:07 PM - 57 replies
tube rectifier life expectancy06-20-2004 11:09 AM - 12 replies
Metal VS Glass06-20-2004 05:29 AM - 6 replies
does anybody know this transfo?06-20-2004 12:07 AM - 24 replies
need help finding tube make06-19-2004 07:50 PM - 8 replies
VTL deluxe 300 amps - adjustment question06-19-2004 04:47 PM - 7 replies
Building Marshall Plexi06-19-2004 01:40 PM - 1 reply
help converting conrad johnson MV-55 into triode!06-19-2004 09:21 AM - 2 replies
Does more tubes = more filter capacitors?06-19-2004 12:15 AM - 3 replies

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