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  1. Yaqin MC5881a
  2. Humming Sound from tube amp
  3. Level Five 2A3 SE schematic : opinions ?
  4. My screwup = free PCBs...
  5. New stuff on the website: A2 buffer, isolated current sensor
  6. 12.6vDC Heaters, looking for a shortcut
  7. Fisher 80-AZ bias milliamps?
  8. Can shed some light on this EL 34 schematic diagram
  9. Solid State Rectifier in Dynaco Tube Amp
  10. Big chassis designs!
  11. 12ax7 LP
  12. plitron output w/ cfb usage ideas
  13. 390 ohm should have been 390k ohm
  14. Advice sought re what tube power amp
  15. EL34 SED Winged C Black Prints: original??
  16. OPTx from Ogonowski
  17. Aikido cathode follower (ACF) with 12au7
  18. SEP EL-34 to 6L6GC?
  19. Volume Pot Spec
  20. My Tube Pre-Amp Picking up an AM radio station?
  21. Philips 6SN7 GTA & GTB
  22. ST-120 Problem With Rectifier Tube
  23. New Yaqin VK-2100
  24. Electronic parts and sub-zero temperature
  25. Bendix 6384 as EL34: Experience anyone?
  26. Audioresearch LS2B schematic needed
  27. input noise - too simple - but need explaination
  28. Plate voltage with/without tube (for fine tune bias adjustemnt)
  29. Using trimmers / potentiometers to adjust tube operating points
  30. KT88 SED winged C tolerance tall for quad
  31. Power Transformer Tolerances
  32. 12E1 Ultra Linear
  33. Comparison KT150 versus KT120
  34. 6sn7: GT GTA GTB sono differences for HIFI
  35. Audio Research LS5 Power Supply Problem
  36. Vintage grundig vs. new Yaqin. Advice?
  37. 5AR4 PSU
  38. What tube is this ?
  39. Need Schematic
  40. Budget PP Iron: Transcendar or Edcor?
  41. Yaqin MC-10L buzz
  42. Transformer buzzing when filament section is loaded
  43. Grid Stopper v Grid Leak on el84
  44. 2.5V Heater Tranformer-Best to Use One Per Channel?
  45. Amp: KT88 push-pull shunt feedback output via p-channel fet
  46. My biggest fear....
  47. I've made an awful mess...
  48. Any input for a tube noob's first attempt? Flea Watt 12b4, 6dj8, low B+
  49. Kolster-Brandes er30
  50. Buzz that goes away when input grounded.
  51. Hovland HP-100 tube replacement
  52. Dynaco ST-120 Turn On Pop or Problem
  53. Grounding two channel preamp sharing a psu.
  54. Convert hybrid amp to pure tube output?
  55. Please Help me with this tubes
  56. 211- 6e5p full amp. The first setps
  57. E810F and general pentodes design question
  58. Pop goes the bias cap.
  59. High Power Single Ended Triode, Design
  60. Yaqin MS-6V6 vs. Markhill MS-6V6
  61. Schematic please: Luxman MQ-70?
  62. Aikido tube preamp with Tortuga LDR volume control
  63. Type 37 tube preamp
  64. Figuring out a KT88 datasheet?
  65. Power supply 260V for tube preamp
  66. Aikido Tube with Tortuga volume control project
  67. Adding a pre out to amp
  68. One or two ECC82 for two channels (crosstalk)!
  69. Red Pilot (240)
  70. 77:1 Output Transformer Question
  71. Power transformer recommendation Kt88 SE and JE labs Riaa
  72. Tube output power for OPT calculation
  73. 6sn7 tube anode folower question?????
  74. Goldox 9300
  75. good quality/sounding preamp advice
  76. PL84 schematic question.
  77. YouTube Video: 12AX7 comparisons.
  78. How many volts ???
  79. Greetings all/ (newbie) Need Advice!
  80. Psud and Single Ended Amplifier
  81. Socket Combiniations
  82. From Potentiometer to Stepped Attenuator
  83. No need for bleed resistors on Fisher 90-T
  84. Sophia 300B+ carbon
  85. PL519 amp SE
  86. C3g Headphone design - will this work?
  87. Luxman 2A3 amp SE
  88. Capacitor on Aikido Power Supply Sampling Circuit
  89. Well, what have I done now?
  90. Aikido CF cathode resistor?
  91. D3A - 6P45S/El519 SE "The staircase" my first h-end amplifier.
  92. SET Cathode Biased vs. Fixed Bias?
  93. JAN6418 pre-amp advise
  94. SOHA II amp tripping
  95. 6JN6 LTspice model?
  96. unusual output transformers, what are they for?
  97. Cheap power amp kit with 6N2 + 6P3
  98. KT88 AMP I'm not sure about power supply
  99. buzz from tubes
  100. Good Power Supply??
  101. Audio Research SP6C
  102. Junk Audio Project (pics)
  103. SE SV83 Paralled Tube Amplifer
  104. Hum in SVP preamp circuit
  105. Advice/tips on tube preamplifier wanted
  106. Transformer Windfall. Now what?
  107. I am being cautious - need to install a ground plug
  108. My first scratch build (6AQ5 SE)....
  109. Pop, Pop, Pop, Pop, Pop
  110. what is this valve? and what is it for??
  111. Lazarus cascade basic preamp
  112. Seperate Power Supply Chassis and Grounding
  113. How To Solder Tips and Tricks
  114. Another CD player tube mod, TDA1541 with transformers and triode cathode followers
  115. PCL86 - Worth a try?
  116. Audio use 3D6/1299 ?
  117. How HOT should a LM317 get?
  118. KT88 amp questions
  119. Restoring a Motorola HS-1048A amp
  120. Please look at this schematic and tells me what have went wrong
  121. Lacking bass response after re-cap
  122. Generate a negative bias voltage?
  123. hammond 369ex instead of 269ex
  124. Recapped a pair of monoblocks
  125. Top Secret!
  126. Toggle or Rotary Switch for Phono Inputs
  127. Flexible tube (or SS) electronic XO
  128. LAVATORY - Lamp Valve Transistor Hybrid (will this work?)
  129. Transformer revers use question
  130. Fixed bias, cathode feedback?
  131. spudnik, spudMiG ?
  132. I need the KT120 base dimensions
  133. Need help with chassis layout.
  134. tube amp ID ?
  135. GU50 filaments voltage!
  136. Does anybody have an RCA RS171 Schematic
  137. Opinions wanted: Low Z SE power supplies
  138. DC heaters, best way to bias ?
  139. Ignition coil as SE OPT
  140. Opt color code identification (Onetics)
  141. Drawback to Larger Capacity Output Transformer Than Required?
  142. Send me some pictures of your amps
  143. leak stereo 60
  144. B2 Spice V5.0
  145. Mains Fuse and Switch Best Practice
  146. Identify these vintage tube amp rivets
  147. RCA ORTHOPHONIC LMI-32216A manual copy needed
  148. Question on strange 6l6 schematic symbols
  149. Resistor value?
  150. ST70 chassis polishing
  151. Octal to RCA
  152. KT120 plate load for 150+watts
  153. Need a copy of Aikido 5687 manual pdf
  154. Nutshell Raven Headphone amp with balanced I/O
  155. Bartolucci: beware of him !!!
  156. Finding plate resistance
  157. Pleides Tube only headphone amp
  158. I think I know what I want (seasoned advice)
  159. CCS filament supply vs inductors for DHT
  160. Cap outer foil low impedance help...
  161. Distorted low end SE micro amp
  162. LM3886 + ECC82/12AU7
  163. My LCR phono with HUM....
  164. Winter 2A3 SET project.
  165. 6BQ5 pp with LM317 ccs
  166. Marantz 7 clone
  167. Music Angel pre-amplifier - few modifications
  168. Transformer Questions (1st Amp Project)
  169. Morgan Jones and PS Bypass Caps
  170. Ruby Tuby at 24V?
  171. Budget Iron for Low-Power SET
  172. Output transformer mounting questions
  173. 3c24 preamp?
  174. Newb Q - JE Simple 2A3 as Monoblocks
  175. Vacuum tube amp design
  176. Counterpoint SA7.1 circuit question
  177. Variable Gain Control Topology
  178. Unknown amplifier, anyone recognice it?
  179. Harman Kardon "The Lute" A-220 - Repair manual?
  180. G2 input grid 6DQ6 push pull
  181. Schade SE 6550
  182. Heathkit aa-23 fix up
  183. 6SN7 Line Stage w/ Tone Controls
  184. Octal Heaven??
  185. how do i reach Chris the georgetown technician?
  186. mu follower bootstrap cap value
  187. POLL: The Legendary Williamson Amp Modified By SY
  188. 5Y3 PSU Question
  189. jolida 302b sweet sounding amp vs Audio Innovations 500
  190. MFA M120 any personal experience values and reviews?
  191. Scott 233D one channel bad - Next Project?
  192. Quickie GLA Tube Amp - whats the 1 ohm setting for?
  193. This Look Right?
  194. SIMPLE KIT with step by step instruction
  195. Ultra Simple PP ECC99?
  196. Heathkit Audio Analyzer
  197. The Best Valve Amp Design In Modern Time: Poll Candidates
  198. Current Requirements for Power Tubes
  199. Thermionic generator (Triode) appears to be real this time...
  200. Choosing Tube + OPT for preamp
  201. My first preamp with tubes
  202. Another New Guy Starting With %@&?~ Chinese PCB
  203. Question about output transformers.
  204. NEETS & Kirchhoff , I'm stuck
  205. Reviving a late 50's el84-based hifi
  206. Need a 7K a-a
  207. Tube ID
  208. Anyone know what these are?
  209. Let's Talk About Grounding
  210. Tube Pre Amp DIY Schematic
  211. Rectifier choice
  212. power transformer fo single tube ecl82 amplifier
  213. Today's Version of The Williamson Amp
  214. what's wrong with my calculations?
  215. Phono stage design considerations part 1: choosing 1st stage tube
  216. Can anyone suggest a practical use for this gauge on a tube amp
  217. Completed my 829 PPP w/ pmillet's driver pcb's.
  218. adding input transformer to Sony sra-2 tube preamp
  219. 6P45S 50W mono block tube amplifier
  220. Is it possible to drive 4xKT88PP with an AC coupled LTP PI?
  221. curious answer from CommonSense Audio
  222. Local Feedback for Push Pull Pentode
  223. Exotic interstage transformers
  224. DAC & Tube Preamp, Elevated Heater Question
  225. This Schematic Sounds Great
  226. Most Exotic MM phono preamplifier
  227. Fast track or How to utilize two 3-hole chassis for 20W+ monoblocks
  228. Strange noises on my Aikido power on
  229. lost capacitance
  230. Best SE KT66 schematic?
  231. Mixing old and new tubes
  232. Mullard 3 Tube 3 watt amplifier Question
  233. Darling Pre-amplifier using WCF for 1626's
  234. Is my tube broken? Which one should replace it?
  235. simplex (6c33c se amp) and stabilized current
  236. Transformers with dual primaries?
  237. Building the VTA, tubes4hifi PH16 Phono Stage
  238. K&E Preamplifier
  239. 12ax7:top psvane or top shuguang?
  240. Software To Help Design Tube Amplifier
  241. How can I drop B+ Voltage
  242. Eico HF-60's power supply.
  243. Need help with Output Transformer for EL84
  244. Where to reference filaments to ground?
  245. Maratnz 9 irons
  246. Noisy re-purposed MOT
  247. Mullard HQ Stereo Amp - Transformers Question
  248. C3g triode-strapped linearity question
  249. Making tube Rp disappear now
  250. 6E5P Connection Question

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