| Tubes - Showing threads 4201 to 4400 of 11911 available |
▫ 5842 grounded grid ▫ 02-05-2007 03:36 AM - 19 replies
▫ measuring hum ▫ 02-04-2007 11:18 PM - 16 replies
▫ 12A6 Healthkit A7 Amp ▫ 02-04-2007 10:57 PM - 2 replies
▫ Russian RF Double Tetrodes ▫ 02-04-2007 06:32 PM - 10 replies
▫ Opinions or inputs on Altec 1570B amplifiers ▫ 02-04-2007 01:20 PM - 26 replies
▫ Chinese EL34 amp to modify ▫ 02-04-2007 11:35 AM - 50 replies
▫ GE 97F cap polarity ??? ▫ 02-03-2007 09:20 PM - 0 replies
▫ 6C8G phase inverter ▫ 02-03-2007 09:05 PM - 4 replies
▫ Shall I disassemble this ampex for parts? ▫ 02-03-2007 08:24 PM - 9 replies
▫ Power Amp Build from Eico ST70 - Negative Feedback Question ▫ 02-03-2007 04:34 PM - 15 replies
▫ ECC83 cathode grounded = awesome overdrive (?!?!?) ▫ 02-03-2007 10:47 AM - 9 replies
▫ Looking for a Balanced Mic Preamp w 12AX7 ▫ 02-03-2007 10:23 AM - 4 replies
▫ Does anyone has a T.A.C.-34 or a T.A.C.-88 schematic? ▫ 02-03-2007 08:29 AM - 1 reply
▫ Conrad Johnson PV10L Phono stage DIY ▫ 02-03-2007 07:54 AM - 2 replies
▫ NEW KT66's ▫ 02-03-2007 05:11 AM - 18 replies
▫ Edcor outputs? ▫ 02-03-2007 04:32 AM - 4 replies
▫ Schematic Comment on 'Principles of Power" book ?? ▫ 02-03-2007 04:17 AM - 2 replies
▫ what kind of resistor is this? ▫ 02-02-2007 10:06 PM - 12 replies
▫ stereo push pull amp one heater supply for power tubes ▫ 02-02-2007 09:35 PM - 5 replies
▫ Building new GU-50 stereo amp... ▫ 02-02-2007 08:02 PM - 87 replies
▫ Tubes and microphonics ▫ 02-02-2007 06:27 PM - 13 replies
▫ 829 or GU-29 audio amplifier schematics? ▫ 02-02-2007 02:13 PM - 46 replies
▫ Electrolytic types... ▫ 02-02-2007 12:29 PM - 1 reply
▫ Consonance t99 schematic/ minimax pre ▫ 02-02-2007 11:25 AM - 1 reply
▫ Useful Supplier of Transformers, Chokes, Chassis and other stuff ▫ 02-02-2007 10:48 AM - 0 replies
▫ Serious case of brain fry. You out there Thorsten? ▫ 02-02-2007 08:19 AM - 19 replies
▫ Upgrading a Beard P100 tubeamp ▫ 02-01-2007 08:08 PM - 15 replies
▫ Tube Amplifier with OT100 ▫ 02-01-2007 03:40 PM - 0 replies
▫ bogen m120 schematic ▫ 02-01-2007 03:22 PM - 0 replies
▫ Question about Thorsten's Tube Phono Pre ▫ 02-01-2007 01:12 AM - 0 replies
▫ PP Output Trafo Measurement ▫ 01-31-2007 11:07 PM - 8 replies
▫ push pull balancing ▫ 01-31-2007 10:49 PM - 4 replies
▫ New issue Mullard Tubes ▫ 01-31-2007 10:09 PM - 8 replies
▫ Help on triode ▫ 01-31-2007 07:22 AM - 1 reply
▫ 5 Volt Damper Diodes? ▫ 01-31-2007 04:33 AM - 12 replies
▫ Please help diagnose preamp problem ▫ 01-31-2007 02:58 AM - 9 replies
▫ 6N1/6N3 substitution ▫ 01-30-2007 11:25 PM - 7 replies
▫ Cathode feedback and input impedance ▫ 01-30-2007 10:05 PM - 2 replies
▫ Optimal ripple voltage on b+ supply ▫ 01-30-2007 09:24 PM - 14 replies
▫ Setup suggestion between DAC-AH and ST-70 ▫ 01-30-2007 07:28 PM - 6 replies
▫ Simple Low Voltage Tube Preamp? ▫ 01-30-2007 05:42 PM - 11 replies
▫ Anyone built this 100W GEC amp? How is the sound? ▫ 01-30-2007 03:29 PM - 0 replies
▫ Does anyone have VT150 schematic? ▫ 01-30-2007 03:26 PM - 3 replies
▫ Ignition Coil Toobe Amplifier ▫ 01-30-2007 02:01 PM - 13 replies
▫ Voltage swing of Heffa? ▫ 01-30-2007 01:29 PM - 3 replies
▫ All pentode PP amp? ▫ 01-30-2007 07:35 AM - 7 replies
▫ GZ34 anode load resistor calculation - help? ▫ 01-30-2007 05:08 AM - 16 replies
▫ Capacitor choice for attached schematic ▫ 01-29-2007 09:39 PM - 11 replies
▫ need help with adding headphone output to S5 Electronics kit / K501 kit ▫ 01-29-2007 09:23 PM - 0 replies
▫ The sound of... tubes ! ▫ 01-29-2007 07:46 PM - 65 replies
▫ All quiet on the SN front - recommended choice of tubes ▫ 01-29-2007 05:29 PM - 4 replies
▫ Moscode 600 hum/turn off thump ▫ 01-29-2007 03:02 PM - 10 replies
▫ Tube Tester Resto Basics ▫ 01-29-2007 02:40 PM - 13 replies
▫ Marshall 100v 8100U Guitar Amp Hums ▫ 01-29-2007 02:20 PM - 0 replies
▫ What's the simple killer tube amp? Anyone? ▫ 01-29-2007 01:24 PM - 18 replies
▫ Help - CFB in a KT88 SE amp ▫ 01-29-2007 06:20 AM - 4 replies
▫ Any Russian speakers here? ▫ 01-29-2007 02:19 AM - 6 replies
▫ 6av6 Diode use? ▫ 01-29-2007 12:37 AM - 1 reply
▫ Power Supply ▫ 01-29-2007 12:03 AM - 6 replies
▫ Choke rating for choke input duty ▫ 01-28-2007 11:42 PM - 14 replies
▫ drawing a loadline for a power stage EL34 tube. ▫ 01-28-2007 10:22 PM - 3 replies
▫ Experiencing problems to insert tubes ▫ 01-28-2007 09:31 PM - 6 replies
▫ Preamp signal wiring ideas ? ▫ 01-28-2007 09:23 PM - 7 replies
▫ el34PP circuit evaluation!! ▫ 01-28-2007 06:58 PM - 2 replies
▫ "Re-Forming" Caps on Old Tube Amp ▫ 01-28-2007 02:20 PM - 6 replies
▫ Gary Pimm website? ▫ 01-28-2007 11:11 AM - 8 replies
▫ Haltron (UK), Trigon (UK) and Ultron (germany) ECC83 tubes info request. ▫ 01-28-2007 10:35 AM - 2 replies
▫ Audio Research D150 bias setting ▫ 01-28-2007 07:09 AM - 0 replies
▫ Cathodyne phase splitter with CCS? ▫ 01-28-2007 06:26 AM - 42 replies
▫ Has anyone tried 2 x 6550 100W amp? ▫ 01-28-2007 03:59 AM - 19 replies
▫ Headphone amp with tube PS ▫ 01-28-2007 03:54 AM - 22 replies
▫ modelling PSU for Aikido ▫ 01-27-2007 11:09 PM - 16 replies
▫ 27 head phone amp or.?? ▫ 01-27-2007 05:42 PM - 0 replies
▫ New Chassis Fabrication Pics and Capacitor Question ▫ 01-27-2007 02:04 PM - 9 replies
▫ Replacing old caps in the SP8 pre-amp ▫ 01-27-2007 09:55 AM - 5 replies
▫ Tube choice for Class A2 ▫ 01-27-2007 04:25 AM - 59 replies
▫ hybrid graetz in PSUDII ▫ 01-27-2007 01:16 AM - 1 reply
▫ 6C45P Spud ▫ 01-26-2007 10:52 PM - 0 replies
▫ Philips ECG 12AX7WA or GE 5751 ?? Opinions, please. ▫ 01-26-2007 06:31 PM - 0 replies
▫ Single Ended EL34 Amp ▫ 01-26-2007 05:57 PM - 20 replies
▫ Rp / Rk on Aikido preamp ▫ 01-26-2007 04:48 PM - 11 replies
▫ hum in amp! ▫ 01-26-2007 12:17 PM - 49 replies
▫ Looking for a 83 rectifier model ▫ 01-26-2007 10:22 AM - 1 reply
▫ Advice wanted on ebay SET amps ▫ 01-26-2007 09:03 AM - 3 replies
▫ Resistors for ultralinear-to-triode conversion ▫ 01-26-2007 06:44 AM - 6 replies
▫ Gary Pimm ▫ 01-24-2007 11:03 PM - 0 replies
▫ resistor values for lifting ground AND LED ▫ 01-24-2007 10:55 PM - 1 reply
▫ output transformer impedance choices ▫ 01-24-2007 10:33 PM - 3 replies
▫ Feedback disc recording amp ▫ 01-24-2007 08:09 PM - 0 replies
▫ 6bm8/ECL82 vs EL84 ▫ 01-24-2007 06:21 PM - 9 replies
▫ B+ filter caps ▫ 01-24-2007 04:49 PM - 12 replies
▫ (Newbie) CSS Question ▫ 01-24-2007 12:34 PM - 8 replies
▫ 6P15P Tubes: Push Pull Possible? ▫ 01-24-2007 11:42 AM - 21 replies
▫ Tube X-ref list ?? ▫ 01-24-2007 07:56 AM - 1 reply
▫ AVO tube tester spares ▫ 01-24-2007 07:53 AM - 7 replies
▫ Add gain before or after the phase splitter? ▫ 01-24-2007 07:23 AM - 84 replies
▫ ping SY: Red Light LED question ▫ 01-23-2007 06:22 PM - 5 replies
▫ Greinacher voltage multiplier ▫ 01-23-2007 02:14 PM - 10 replies
▫ Dead channel ▫ 01-23-2007 01:49 PM - 15 replies
▫ Euphonia is back! ▫ 01-23-2007 01:14 PM - 1 reply
▫ What's the best 417A & 437A? ▫ 01-23-2007 02:27 AM - 3 replies
▫ Eico ST70 OPT / Schematic Question ▫ 01-23-2007 01:19 AM - 11 replies
▫ Is this feasible? ▫ 01-22-2007 07:48 PM - 4 replies
▫ Repairing 805 tubes ▫ 01-22-2007 07:44 PM - 1 reply
▫ jadis defy 7 help ▫ 01-22-2007 07:14 PM - 0 replies
▫ 6n1p Screen ▫ 01-22-2007 01:59 PM - 1 reply
▫ Mc275ce ▫ 01-22-2007 01:33 PM - 1 reply
▫ Are these tubes are the same? ▫ 01-22-2007 10:25 AM - 6 replies
▫ "King of tube(s) for line-stages" ▫ 01-22-2007 10:10 AM - 4 replies
▫ Acoustic Plan PhonoMaster ▫ 01-22-2007 06:33 AM - 0 replies
▫ Heathkit AA-81 schematic ▫ 01-22-2007 12:07 AM - 1 reply
▫ has anyone kept a copy of gpimm's latest self-biasing CCS? ▫ 01-21-2007 09:05 PM - 2 replies
▫ How to wire inductor - s and n ▫ 01-21-2007 06:46 PM - 3 replies
▫ Rogers Cadet III schematics Corrections ▫ 01-21-2007 02:38 PM - 4 replies
▫ Hickok TV-7/U restoration advice needed. ▫ 01-21-2007 02:32 PM - 2 replies
▫ Rogers Cadet III to SY's Red Light District or Gingertubes's Baby Huey ▫ 01-21-2007 12:17 PM - 24 replies
▫ 24v Aikido for newb. ▫ 01-20-2007 11:43 PM - 23 replies
▫ Powering Up Old Tube Amps/Receivers ▫ 01-20-2007 11:17 PM - 3 replies
▫ preliminary schematic drawing rev.1a ▫ 01-20-2007 11:04 PM - 9 replies
▫ Not a typical MKIII Dynaco. ▫ 01-20-2007 09:46 PM - 10 replies
▫ mosfet buffer for power stage ▫ 01-20-2007 04:59 PM - 4 replies
▫ 304TL based Class A ▫ 01-20-2007 04:08 PM - 25 replies
▫ EI KT-90 news ▫ 01-20-2007 04:08 PM - 5 replies
▫ Purchasing NOS Tubes ▫ 01-20-2007 03:48 PM - 6 replies
▫ tube power supply design resources ▫ 01-20-2007 02:03 PM - 3 replies
▫ High Voltage Regulator Design ▫ 01-20-2007 06:56 AM - 22 replies
▫ max. output for two 5881 tubes? ▫ 01-19-2007 09:50 PM - 7 replies
▫ Excessive current draw in Fender Deville ▫ 01-19-2007 08:19 PM - 4 replies
▫ driving your power stage ▫ 01-19-2007 07:33 PM - 23 replies
▫ Need schematic Cary Audio SLP-70 preamp ▫ 01-19-2007 03:05 PM - 0 replies
▫ Bridge-balanced amplifiers ▫ 01-19-2007 11:54 AM - 0 replies
▫ Tell-tale signs of good feedback usage? ▫ 01-19-2007 11:31 AM - 22 replies
▫ Any mid priced SE transformers around? ▫ 01-19-2007 03:41 AM - 21 replies
▫ Bias resistor ▫ 01-18-2007 09:48 PM - 14 replies
▫ Some sneek peeks ▫ 01-18-2007 06:32 PM - 6 replies
▫ Old radio with 4 pin sockets, info? ▫ 01-18-2007 05:30 PM - 16 replies
▫ need help on pot tapers ▫ 01-18-2007 05:17 PM - 3 replies
▫ amplifier for unknown output transformers? ▫ 01-18-2007 02:31 PM - 20 replies
▫ A typical KT88 tubes ▫ 01-18-2007 02:31 PM - 0 replies
▫ vista audio ▫ 01-18-2007 02:31 PM - 0 replies
▫ CV4014 and 5650 - any audio application of these tubes? ▫ 01-18-2007 12:03 PM - 0 replies
▫ SVP-PRO schematic ▫ 01-17-2007 10:19 PM - 3 replies
▫ Looking for a good source for attenuators ▫ 01-17-2007 09:29 PM - 4 replies
▫ Center-tap to ground? ▫ 01-17-2007 08:42 PM - 3 replies
▫ 6n1p-ev operating points ▫ 01-17-2007 06:24 PM - 2 replies
▫ where to find old pot's with switch built in ▫ 01-17-2007 06:21 PM - 3 replies
▫ Maggie refurb project ▫ 01-17-2007 03:50 PM - 17 replies
▫ Parafeed output ▫ 01-17-2007 02:51 PM - 0 replies
▫ Hirtel junior stereo italian tube amp ▫ 01-17-2007 07:57 AM - 3 replies
▫ power supply help ▫ 01-17-2007 06:24 AM - 6 replies
▫ 7189/7189A Problem ▫ 01-17-2007 02:37 AM - 6 replies
▫ Glow modulation tubes ▫ 01-16-2007 08:30 PM - 9 replies
▫ Transformer Hum leaks to Speakers ▫ 01-16-2007 08:22 PM - 16 replies
▫ EAR Yoshino V20 Amplifier ▫ 01-16-2007 07:38 PM - 20 replies
▫ Repair a tube tester? ▫ 01-16-2007 01:39 PM - 3 replies
▫ Mullard high speed tester ▫ 01-16-2007 01:39 PM - 11 replies
▫ starting PP - 6p3s ▫ 01-16-2007 10:05 AM - 17 replies
▫ 6BL7 rA in PP ▫ 01-16-2007 09:17 AM - 1 reply
▫ Why such high plate voltage in 2A3 DRD? ▫ 01-15-2007 11:55 PM - 2 replies
▫ to parafeed or not to parafeed that is the question ▫ 01-15-2007 11:43 PM - 63 replies
▫ Lowering voltage output of transformer ▫ 01-15-2007 11:14 PM - 8 replies
▫ Using EL34 in a line stage ▫ 01-15-2007 08:27 PM - 7 replies
▫ peerless transfomer information ▫ 01-15-2007 06:58 PM - 17 replies
▫ Output transformer design for SS amp ▫ 01-15-2007 02:43 PM - 12 replies
▫ CD source fortube amp ▫ 01-15-2007 02:36 PM - 0 replies
▫ What's the SIMPLEST 50W or higher Amp Schematic but best sound you've heard ? ▫ 01-15-2007 02:08 PM - 6 replies
▫ BIG tube amplifier, two qbl5/3500 tubes ▫ 01-15-2007 01:21 PM - 23 replies
▫ EL34 or 6L6 mono help me please!! ▫ 01-15-2007 12:59 PM - 0 replies
▫ Why don't we use output tubes as cathode followers? ▫ 01-15-2007 05:22 AM - 15 replies
▫ 6C33 driver recommendations ▫ 01-15-2007 04:47 AM - 3 replies
▫ 100watt power, fixed gain far cleaner than Marshall amp any sugestion ▫ 01-15-2007 04:15 AM - 6 replies
▫ Minimum Zener Current with Pass Device ▫ 01-14-2007 11:33 PM - 6 replies
▫ Favorite easy 6V6 push-pull circuit? ▫ 01-14-2007 10:22 PM - 48 replies
▫ Tubecad soft-clipping circuit ▫ 01-14-2007 10:16 PM - 2 replies
▫ broskie voltage regulator ▫ 01-14-2007 08:26 PM - 2 replies
▫ E88CC dissipation in Aikido ▫ 01-14-2007 08:12 PM - 6 replies
▫ Magnavox 6BQ5/EL84 and Mr. Gabe ▫ 01-14-2007 06:31 PM - 42 replies
▫ Aikido hum has me stumped !!!! ▫ 01-14-2007 06:08 PM - 21 replies
▫ 5842 and 5842 WA for 300B ▫ 01-14-2007 06:05 PM - 11 replies
▫ Basic tube combination question. ▫ 01-14-2007 12:39 PM - 3 replies
▫ Resistive ps voltage follower ▫ 01-14-2007 10:35 AM - 22 replies
▫ First time DIY tube ▫ 01-14-2007 08:34 AM - 2 replies
▫ Need help with hum and faint left channel on my S5 Electronics kit ▫ 01-14-2007 12:02 AM - 4 replies
▫ grid impedence of paralleled tubes in push pull ▫ 01-13-2007 11:35 PM - 2 replies
▫ Fender Bassman PT Rewind ▫ 01-13-2007 11:24 PM - 4 replies
▫ rectification ▫ 01-13-2007 10:53 PM - 9 replies
▫ 6AU6 Varieties ▫ 01-13-2007 08:35 PM - 2 replies
▫ EMI tubes (British made) ▫ 01-13-2007 08:34 PM - 4 replies
▫ valve wear symptoms? ▫ 01-13-2007 08:28 PM - 9 replies
▫ Standby switch, snap, crackle, pop? ▫ 01-13-2007 03:59 PM - 10 replies
▫ Aikido PSU questions (Bas Boards) ▫ 01-13-2007 12:05 PM - 2 replies
▫ one tube amps ▫ 01-13-2007 10:36 AM - 0 replies
▫ Intermittant Clicking ▫ 01-13-2007 04:34 AM - 16 replies
▫ How to solve noise/storing/on car Tube Amp ? any Schematic ? ▫ 01-13-2007 01:22 AM - 3 replies
▫ Series MOSFET regulator better with just voltage ref on gate or with error amp? ▫ 01-13-2007 12:22 AM - 68 replies
▫ Tube spice models ▫ 01-13-2007 12:02 AM - 30 replies
▫ Audible Illusions Modulus faulty? ▫ 01-12-2007 10:44 PM - 4 replies
▫ Ei Tubes.. ▫ 01-12-2007 10:06 PM - 6 replies
▫ more output transformer questions ▫ 01-12-2007 04:43 PM - 34 replies
▫ 6C33 design comments? ▫ 01-12-2007 10:55 AM - 38 replies
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