Audio Project Amplifier Speaker Loudspeaker Kit
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Tubes - Showing threads 2401 to 2600 of 11693 available
VAL MPS mark II preamp gain reduction10-11-2007 09:49 AM - 6 replies
It is asked drawing 100 or 200 watts amplifier10-10-2007 10:55 PM - 1 reply
Mystery ST-70 Driver Board10-10-2007 09:33 PM - 9 replies
First Timer needs help10-10-2007 08:47 PM - 24 replies
Help. Bogen m60a10-10-2007 08:09 PM - 5 replies
grid-grounded preamp sound10-10-2007 02:52 PM - 11 replies
Rectifier switching / choke ringing noise10-10-2007 01:03 PM - 13 replies
Single Ended Amp Design -- Help Needed10-10-2007 11:18 AM - 3 replies
tube current10-10-2007 10:01 AM - 5 replies
Needed : ECF83, can anyone help ??10-10-2007 07:52 AM - 11 replies
Problem with a solid state CCS10-10-2007 07:00 AM - 5 replies
Looking for low-ish rp single triode10-09-2007 05:59 PM - 18 replies
Cleaning beverage out of inside tube amp10-09-2007 05:40 PM - 15 replies
Aikido problems!!!10-09-2007 02:31 PM - 16 replies
Another Power Supply Question10-09-2007 10:27 AM - 12 replies
2a3 output transformers....10-09-2007 04:18 AM - 3 replies
yet another 6em7 amp10-09-2007 04:18 AM - 6 replies
zenith amp10-09-2007 03:35 AM - 6 replies
6AG7 Amplifier10-08-2007 07:47 PM - 11 replies
Valve Power Supplies?10-08-2007 01:15 PM - 2 replies
tube tracer article10-08-2007 11:39 AM - 0 replies
PCB design techniques for Tube Amps10-08-2007 06:23 AM - 13 replies
Adjectives for tube sound!10-08-2007 05:49 AM - 6 replies
Question about Amperex tubes and a preamp10-08-2007 04:33 AM - 2 replies
I want to build a preamp for my dad.. thoughts?10-07-2007 11:46 PM - 31 replies
Constant Current DC Heater Supply10-07-2007 10:10 PM - 10 replies
Weekend Fun with Tubes - Guitar Preamp10-07-2007 04:25 PM - 5 replies
Which valves for MF CD-T10-07-2007 04:23 PM - 1 reply
6C33C-EB / 6C33C-EV extended life ?10-07-2007 01:46 PM - 2 replies
Yamamoto A-08S RCA 45 tube amplifier original schematic10-07-2007 11:32 AM - 1 reply
Audiovalve RKV schematic (hybrid headphones amp)10-07-2007 08:37 AM - 2 replies
Music Angel EL34 XDSE10-07-2007 08:20 AM - 1 reply
Dynaco PAS Preamp Tone Controls10-07-2007 04:32 AM - 0 replies
build 805 or 845 se for ~$100010-07-2007 01:02 AM - 5 replies
Built a quick 26 pre yesterday..nice so far,,10-06-2007 09:30 PM - 0 replies
An UL preamp idea.10-06-2007 07:43 PM - 15 replies
6BX7 PSpice Model?10-06-2007 02:56 AM - 8 replies
using 24G and 3B28 in an od ball amp.......10-06-2007 02:10 AM - 6 replies
Tube Line Buffer10-05-2007 05:17 PM - 8 replies
Please help me build an amp for my father10-05-2007 06:41 AM - 25 replies
Why is my phono amp fatiguing?10-05-2007 03:23 AM - 25 replies
Heater current drawn by 841610-05-2007 02:49 AM - 3 replies
want dead counterpoint SA100 SA-100 in good cosmetics10-04-2007 08:52 PM - 0 replies
Cathode Followers and Clipping10-04-2007 08:42 PM - 7 replies
transformer secondary connections10-04-2007 07:31 PM - 0 replies
imp amp10-04-2007 03:32 PM - 0 replies
Information 6DJ810-04-2007 03:32 PM - 2 replies
Smoothing Cap = Noise Source?10-04-2007 07:11 AM - 2 replies
peavey ultra 60 footswitch wiring diagram10-04-2007 07:03 AM - 0 replies
6S19P budget SE.10-04-2007 05:34 AM - 5 replies
adding reverb to a PA head10-04-2007 02:16 AM - 9 replies
My 2 new latest Dynaco ST-70's10-04-2007 01:10 AM - 10 replies
help with KT88 / mikaels SE amp10-03-2007 10:12 PM - 1 reply
twin reverb 100 watt10-03-2007 05:48 PM - 3 replies
adding LEDs to amp head10-03-2007 04:48 PM - 4 replies
What Is Line Level????10-03-2007 03:32 PM - 3 replies
chokes, caps, and long distance relationships10-03-2007 05:23 AM - 3 replies
First foray into tubes!!10-02-2007 10:01 PM - 22 replies
Simple Hi-end 845 amplifier10-02-2007 06:03 PM - 56 replies
increased choke inductance - recommended?10-02-2007 05:21 PM - 8 replies
HELP PLEASE - with preamp design10-02-2007 01:08 PM - 5 replies
Alternative to James OPTs10-02-2007 07:29 AM - 25 replies
DIY preamp tube: Audio Research Reference 3???10-02-2007 05:23 AM - 7 replies
Crowhurst's Twin Coupled Amplifier10-02-2007 12:10 AM - 23 replies
6lw6 tv sweep tube bias?10-01-2007 11:11 PM - 14 replies
24V aikido build!10-01-2007 09:01 PM - 10 replies
magnavox tube radio10-01-2007 08:29 PM - 43 replies
New S5 L series kits10-01-2007 07:09 PM - 1 reply
Anyone has experience with Stranwood10-01-2007 03:26 PM - 1 reply
6n6p amp10-01-2007 10:59 AM - 2 replies
DC Darling Amp – Buzzing on both channels.10-01-2007 08:42 AM - 9 replies
6SL7 EL34 300B amp10-01-2007 04:32 AM - 2 replies
I just installed Yeos (DIY Paradise) DC Blocker10-01-2007 02:06 AM - 10 replies
Measuring Cathode Current09-30-2007 10:30 PM - 7 replies
Need the Ogirin Circuit of Bruce Berman09-30-2007 03:45 PM - 5 replies
Input Choke Too Small09-29-2007 10:07 PM - 1 reply
Poodle gives clues to capacitor construction09-29-2007 09:00 PM - 7 replies
Would a line stage/preamp be beneficial? NEWBIE question09-29-2007 05:23 PM - 21 replies
6p45c09-29-2007 09:21 AM - 9 replies
fanon pa amp schematic09-29-2007 01:57 AM - 3 replies
line stage confusion09-28-2007 10:07 PM - 2 replies
Hammond Transformer Secondary Connections09-28-2007 06:30 PM - 7 replies
Klimo Merlin LS Tube Power Supply09-28-2007 05:22 AM - 0 replies
OPT Design Assistante (EL84)09-28-2007 04:07 AM - 110 replies
Hum - can't find an answer by searching the forum09-27-2007 05:33 PM - 26 replies
Please critique my plans for a WE91 clone.09-27-2007 01:29 PM - 41 replies
Emission Labs 300B Mesh plate09-27-2007 04:28 AM - 3 replies
DRD Power Supply09-27-2007 04:00 AM - 1 reply
Octal Champ works - pls check design09-26-2007 11:46 PM - 9 replies
telefunken EL 34 audio tube09-26-2007 09:05 PM - 3 replies
Bias instability in Heathkit W-5M amp09-26-2007 06:55 PM - 2 replies
EL-34 instability in EICO HF-35 amp09-26-2007 05:43 PM - 0 replies
Russian paper in oil caps - any good?09-26-2007 02:21 PM - 18 replies
Matching Impedances09-26-2007 12:34 AM - 3 replies
Open-Source Audio Input Switch09-25-2007 11:21 PM - 60 replies
Phono pre amp RF problem09-25-2007 04:43 PM - 26 replies
Best CHEAP + best BEST current production EL34?09-25-2007 04:40 PM - 19 replies
New toy09-25-2007 01:49 PM - 4 replies
EL84 SEP schematic. Some questions.09-25-2007 01:36 PM - 5 replies
Referencing DC heaters to cathode09-24-2007 06:58 PM - 31 replies
Need advice on Val Audio amp with EL-34 Tubes09-24-2007 05:05 PM - 49 replies
Please help a newbie with PSU current requirement for Aikido linestage09-24-2007 02:07 PM - 1 reply
Loudspeaker noise from 300B09-24-2007 10:06 AM - 1 reply
Schematic for GU-50, EL34, 6J32P ???09-24-2007 09:11 AM - 3 replies
alternative for heater / B+ references09-23-2007 11:15 PM - 4 replies
need a little help from some tube Gurus!!!09-23-2007 08:32 PM - 14 replies
EF86 + SPICE = no noise contribution?09-23-2007 08:18 PM - 1 reply
One channel softer than the other, humming and buzzing09-23-2007 05:46 PM - 3 replies
6n1 tube = 6n1p09-23-2007 05:46 PM - 2 replies
Parallel Output Transformers09-23-2007 05:39 PM - 20 replies
Distortion from heater sag?09-23-2007 04:03 PM - 33 replies
Testing 5842 / 417a09-23-2007 08:56 AM - 1 reply
RH ECL86 Amp: Dave?09-23-2007 04:48 AM - 7 replies
High gain pentodes09-23-2007 03:12 AM - 14 replies
Tube Matching and Push-Pull09-23-2007 12:00 AM - 2 replies
What constitutes a leaky Coupling capacitor?09-22-2007 10:04 PM - 5 replies
Question on Input Connections09-22-2007 07:08 PM - 2 replies
s5electronics tube amp kit damping factor09-22-2007 12:25 PM - 9 replies
6L6s and cabinet selections HELP!!!!09-22-2007 07:04 AM - 11 replies
source of nickel + silicon steel laminations09-22-2007 04:40 AM - 1 reply
Explanation for this problem?09-22-2007 12:19 AM - 4 replies
turn off thump09-21-2007 10:05 PM - 6 replies
Pop from amp when turning off09-21-2007 12:16 PM - 2 replies
Big Paper in Oil Caps09-21-2007 12:02 PM - 10 replies
Valve noobie asks for help / advice09-21-2007 01:12 AM - 40 replies
Polypropylene vs electrolytic in Power supply09-21-2007 12:15 AM - 25 replies
6S4P vs 584209-20-2007 11:17 PM - 4 replies
Calibrating Your Hickok Tube Tester09-20-2007 06:17 PM - 0 replies
Which 2A3 ?09-20-2007 01:25 PM - 18 replies
New design: 12V push-pull tube amplifier09-20-2007 12:54 PM - 3 replies
hybrid power supply: diode bridge into diode tube09-20-2007 08:02 AM - 8 replies
heater reference to B+ and buzzing trafo09-20-2007 05:31 AM - 9 replies
Just finished a new PP headphone amp - and it works !!09-19-2007 05:15 PM - 22 replies
Hum cancelling scheme?09-19-2007 06:24 AM - 15 replies
Run a transformer backwards?09-19-2007 05:16 AM - 20 replies
FIVRE RRCF info needed09-19-2007 04:14 AM - 2 replies
Siemens Valvo ED-800009-18-2007 09:15 PM - 2 replies
6J5 and 6F6 SE - enough gain for guitar?09-18-2007 05:32 PM - 10 replies
My last Zamir Aleph09-18-2007 04:56 PM - 18 replies
Questions about first tube PSU!09-18-2007 04:20 PM - 2 replies
Looking for site09-18-2007 12:11 PM - 3 replies
Heater voltage mismatch09-18-2007 12:51 AM - 16 replies
Contacting Pete Millet for 813 PSU?09-18-2007 12:46 AM - 2 replies
Suggestions for first tube project?09-17-2007 10:16 PM - 12 replies
Just Saying Howdy09-17-2007 07:55 PM - 2 replies
Wiring a tube rectifier PSU09-17-2007 07:07 PM - 8 replies
Looking for a small yet powerful pentode / dual triode?09-17-2007 01:20 PM - 15 replies
Earth Bus Wire - Where can I get it?09-17-2007 02:53 AM - 29 replies
Tube Amp Startup09-16-2007 11:29 PM - 30 replies
45 amplifier09-16-2007 08:23 PM - 10 replies
Noob saying Hi...09-16-2007 07:52 PM - 11 replies
Maida regulator09-16-2007 05:40 PM - 12 replies
Sensitivity limiter in Bogen MX60a09-16-2007 03:33 PM - 0 replies
Just finished first amp09-16-2007 12:26 PM - 14 replies
6080 / 6AS7G power amplifier09-16-2007 12:10 PM - 1 reply
Schematics09-16-2007 04:09 AM - 2 replies
General questions before finishing up ST-35 clone09-16-2007 03:48 AM - 8 replies
Will a 12AX7 sub. for 12DW7/7247?09-15-2007 11:40 PM - 6 replies
Deutsche Wurlitzer Lyric Jukebox?09-15-2007 09:10 PM - 0 replies
Made in China buyer beware...09-15-2007 08:32 PM - 33 replies
Variac to power-up Beveridge OTLs?09-15-2007 07:58 PM - 1 reply
Any ideas on how old this is?09-15-2007 04:06 PM - 5 replies
Philips Tube radio09-15-2007 03:01 PM - 5 replies
Improve Avel toroid in OTL amp09-15-2007 01:13 PM - 0 replies
tube pre amp mods in queensland, australia09-15-2007 02:07 AM - 1 reply
6SL7GT pre-amp09-14-2007 09:39 PM - 8 replies
Aikido circuit question09-14-2007 09:02 PM - 3 replies
question09-14-2007 07:52 PM - 0 replies
Edcor OPT's w/ SimpleSE09-14-2007 06:51 PM - 52 replies
Please check this PSU09-14-2007 04:25 PM - 12 replies
met. MKP in oil capacitors for PSU?09-14-2007 09:15 AM - 3 replies
EH EL34's at +600V?09-14-2007 09:15 AM - 33 replies
The Infamous Kay 703C! - Help finding an output transformer?09-14-2007 08:05 AM - 4 replies
MOT's as output transformers?09-14-2007 02:53 AM - 9 replies
Grain oriented silicon steel core data needed09-14-2007 02:08 AM - 0 replies
Gibson reverb driver transformer09-13-2007 11:56 PM - 5 replies
PSUD II help09-13-2007 05:36 PM - 10 replies
Edcor In SE Guitar Amp09-13-2007 05:09 PM - 9 replies
Tube curves09-13-2007 12:42 PM - 4 replies
S-5 electronics amp kits09-12-2007 11:53 PM - 8 replies
up-to-date El Cheapo schematic09-12-2007 04:26 PM - 12 replies
unknown output trannie09-12-2007 10:59 AM - 1 reply
Help needed with KT88 Amp design09-12-2007 06:10 AM - 25 replies
Bogen MX60a09-11-2007 09:22 PM - 4 replies
AIKIDO - Low-volage with buffer version09-11-2007 12:59 PM - 3 replies
6N6P cascode calculation09-11-2007 07:09 AM - 2 replies
866a Min operating voltages09-11-2007 05:03 AM - 10 replies
new 6V6 amp09-11-2007 03:33 AM - 7 replies
Tube-based CCS- 0.2uF cap OK?09-10-2007 09:47 PM - 1 reply
DHT filament PSU: What would you do?09-10-2007 08:53 AM - 11 replies
PSU problem09-10-2007 06:00 AM - 6 replies
811A se amp using a solid state driver09-09-2007 05:07 PM - 11 replies
ECC83 - Long Plate vs Short Plate09-09-2007 12:46 PM - 16 replies
Tube Matching09-09-2007 11:41 AM - 11 replies
Cascoded mu-follower09-09-2007 11:29 AM - 5 replies
DIY speaker choice for SE09-09-2007 07:34 AM - 11 replies
Output transformer wanted09-08-2007 09:58 PM - 2 replies
big valve traffo for guitar amp?09-08-2007 11:56 AM - 15 replies
Tube Tester09-07-2007 10:37 PM - 5 replies
835 amp09-07-2007 08:34 PM - 2 replies

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