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  1. O'netics, Electra Print: anyone have both?
  2. How to maximize power transfer in tube circuit designs, damping is not the question!
  3. Inexpensive 2.5k primary SET OPT with 90mA+ DC bias rating?
  4. 4p1L Ultralinear
  5. RH300B 12W with 1% THD
  6. This is where the adventure begins
  7. 12AU7 pre rebuild suggestions
  8. Subwoofer Channel on Tube Amp
  9. Changing input tube from 12ax7 to 6AU6A on OTL project
  10. Yaqin MC5881a
  11. Humming Sound from tube amp
  12. Level Five 2A3 SE schematic : opinions ?
  13. My screwup = free PCBs...
  14. New stuff on the website: A2 buffer, isolated current sensor
  15. 12.6vDC Heaters, looking for a shortcut
  16. Fisher 80-AZ bias milliamps?
  17. Can shed some light on this EL 34 schematic diagram
  18. Solid State Rectifier in Dynaco Tube Amp
  19. Big chassis designs!
  20. 12ax7 LP
  21. plitron output w/ cfb usage ideas
  22. 390 ohm should have been 390k ohm
  23. Advice sought re what tube power amp
  24. EL34 SED Winged C Black Prints: original??
  25. OPTx from Ogonowski
  26. Aikido cathode follower (ACF) with 12au7
  27. Ampeg vt60 tri ax (did it really exist?)
  28. SEP EL-34 to 6L6GC?
  29. Volume Pot Spec
  30. My Tube Pre-Amp Picking up an AM radio station?
  31. Philips 6SN7 GTA & GTB
  32. ST-120 Problem With Rectifier Tube
  33. New Yaqin VK-2100
  34. Electronic parts and sub-zero temperature
  35. Bendix 6384 as EL34: Experience anyone?
  36. Audioresearch LS2B schematic needed
  37. input noise - too simple - but need explaination
  38. Plate voltage with/without tube (for fine tune bias adjustemnt)
  39. Using trimmers / potentiometers to adjust tube operating points
  40. KT88 SED winged C tolerance tall for quad
  41. Power Transformer Tolerances
  42. 12E1 Ultra Linear
  43. Comparison KT150 versus KT120
  44. 6sn7: GT GTA GTB sono differences for HIFI
  45. Audio Research LS5 Power Supply Problem
  46. Vintage grundig vs. new Yaqin. Advice?
  47. 5AR4 PSU
  48. What tube is this ?
  49. Need Schematic
  50. Budget PP Iron: Transcendar or Edcor?
  51. Yaqin MC-10L buzz
  52. Transformer buzzing when filament section is loaded
  53. Grid Stopper v Grid Leak on el84
  54. 2.5V Heater Tranformer-Best to Use One Per Channel?
  55. Amp: KT88 push-pull shunt feedback output via p-channel fet
  56. My biggest fear....
  57. I've made an awful mess...
  58. Any input for a tube noob's first attempt? Flea Watt 12b4, 6dj8, low B+
  59. HV scope use
  60. Kolster-Brandes er30
  61. Buzz that goes away when input grounded.
  62. Hovland HP-100 tube replacement
  63. Dynaco ST-120 Turn On Pop or Problem
  64. Grounding two channel preamp sharing a psu.
  65. Convert hybrid amp to pure tube output?
  66. Please Help me with this tubes
  67. resistor maximum voltage rating
  68. 211- 6e5p full amp. The first setps
  69. E810F and general pentodes design question
  70. Pop goes the bias cap.
  71. High Power Single Ended Triode, Design
  72. Yaqin MS-6V6 vs. Markhill MS-6V6
  73. Schematic please: Luxman MQ-70?
  74. Aikido tube preamp with Tortuga LDR volume control
  75. Type 37 tube preamp
  76. Figuring out a KT88 datasheet?
  77. Power supply 260V for tube preamp
  78. Aikido Tube with Tortuga volume control project
  79. Adding a pre out to amp
  80. One or two ECC82 for two channels (crosstalk)!
  81. Red Pilot (240)
  82. 77:1 Output Transformer Question
  83. Power transformer recommendation Kt88 SE and JE labs Riaa
  84. Tube output power for OPT calculation
  85. 6sn7 tube anode folower question?????
  86. Goldox 9300
  87. good quality/sounding preamp advice
  88. PL84 schematic question.
  89. YouTube Video: 12AX7 comparisons.
  90. How many volts ???
  91. Greetings all/ (newbie) Need Advice!
  92. Psud and Single Ended Amplifier
  93. Socket Combiniations
  94. From Potentiometer to Stepped Attenuator
  95. No need for bleed resistors on Fisher 90-T
  96. Sophia 300B+ carbon
  97. Capacitor Temperature
  98. PL519 amp SE
  99. C3g Headphone design - will this work?
  100. Luxman 2A3 amp SE
  101. Capacitor on Aikido Power Supply Sampling Circuit
  102. Well, what have I done now?
  103. Aikido CF cathode resistor?
  104. D3A - 6P45S/El519 SE "The staircase" my first h-end amplifier.
  105. SET Cathode Biased vs. Fixed Bias?
  106. JAN6418 pre-amp advise
  107. SOHA II amp tripping
  108. 6JN6 LTspice model?
  109. unusual output transformers, what are they for?
  110. Cheap power amp kit with 6N2 + 6P3
  111. KT88 AMP I'm not sure about power supply
  112. buzz from tubes
  113. Good Power Supply??
  114. HK guitar amp - help with repair
  115. Audio Research SP6C
  116. Junk Audio Project (pics)
  117. SE SV83 Paralled Tube Amplifer
  118. Hum in SVP preamp circuit
  119. Advice/tips on tube preamplifier wanted
  120. Transformer Windfall. Now what?
  121. I am being cautious - need to install a ground plug
  122. My first scratch build (6AQ5 SE)....
  123. Pop, Pop, Pop, Pop, Pop
  124. what is this valve? and what is it for??
  125. Lazarus cascade basic preamp
  126. Seperate Power Supply Chassis and Grounding
  127. How To Solder Tips and Tricks
  128. Another CD player tube mod, TDA1541 with transformers and triode cathode followers
  129. PCL86 - Worth a try?
  130. Audio use 3D6/1299 ?
  131. How HOT should a LM317 get?
  132. KT88 amp questions
  133. Restoring a Motorola HS-1048A amp
  134. Please look at this schematic and tells me what have went wrong
  135. Lacking bass response after re-cap
  136. Generate a negative bias voltage?
  137. hammond 369ex instead of 269ex
  138. Recapped a pair of monoblocks
  139. Top Secret!
  140. Toggle or Rotary Switch for Phono Inputs
  141. Flexible tube (or SS) electronic XO
  142. LAVATORY - Lamp Valve Transistor Hybrid (will this work?)
  143. Transformer revers use question
  144. Fixed bias, cathode feedback?
  145. spudnik, spudMiG ?
  146. I need the KT120 base dimensions
  147. Need help with chassis layout.
  148. tube amp ID ?
  149. GU50 filaments voltage!
  150. Does anybody have an RCA RS171 Schematic
  151. Opinions wanted: Low Z SE power supplies
  152. DC heaters, best way to bias ?
  153. Ignition coil as SE OPT
  154. Opt color code identification (Onetics)
  155. Drawback to Larger Capacity Output Transformer Than Required?
  156. Send me some pictures of your amps
  157. leak stereo 60
  158. B2 Spice V5.0
  159. Mains Fuse and Switch Best Practice
  160. Identify these vintage tube amp rivets
  161. RCA ORTHOPHONIC LMI-32216A manual copy needed
  162. Question on strange 6l6 schematic symbols
  163. Resistor value?
  164. Paper / plastic hybrid capacitor
  165. ST70 chassis polishing
  166. Octal to RCA
  167. KT120 plate load for 150+watts
  168. Need a copy of Aikido 5687 manual pdf
  169. Nutshell Raven Headphone amp with balanced I/O
  170. Bartolucci: beware of him !!!
  171. Finding plate resistance
  172. Pleides Tube only headphone amp
  173. I think I know what I want (seasoned advice)
  174. CCS filament supply vs inductors for DHT
  175. Cap outer foil low impedance help...
  176. Distorted low end SE micro amp
  177. LM3886 + ECC82/12AU7
  178. My LCR phono with HUM....
  179. Winter 2A3 SET project.
  180. 6BQ5 pp with LM317 ccs
  181. maratz 7 clone
  182. Music Angel pre-amplifier - few modifications
  183. Transformer Questions (1st Amp Project)
  184. Morgan Jones and PS Bypass Caps
  185. Ruby Tuby at 24V?
  186. Budget Iron for Low-Power SET
  187. Output transformer mounting questions
  188. 3c24 preamp?
  189. Newb Q - JE Simple 2A3 as Monoblocks
  190. Vacuum tube amp design
  191. Counterpoint SA7.1 circuit question
  192. Variable Gain Control Topology
  193. Unknown amplifier, anyone recognice it?
  194. Harman Kardon "The Lute" A-220 - Repair manual?
  195. G2 input grid 6DQ6 push pull
  196. Schade SE 6550
  197. Heathkit aa-23 fix up
  198. 6SN7 Line Stage w/ Tone Controls
  199. Octal Heaven??
  200. how do i reach Chris the georgetown technician?
  201. mu follower bootstrap cap value
  202. POLL: The Legendary Williamson Amp Modified By SY
  203. 5Y3 PSU Question
  204. jolida 302b sweet sounding amp vs Audio Innovations 500
  205. MFA M120 any personal experience values and reviews?
  206. Scott 233D one channel bad - Next Project?
  207. Quickie GLA Tube Amp - whats the 1 ohm setting for?
  208. This Look Right?
  209. SIMPLE KIT with step by step instruction
  210. Ultra Simple PP ECC99?
  211. Heathkit Audio Analyzer
  212. The Best Valve Amp Design In Modern Time: Poll Candidates
  213. Current Requirements for Power Tubes
  214. Thermionic generator (Triode) appears to be real this time...
  215. Choosing Tube + OPT for preamp
  216. My first preamp with tubes
  217. Another New Guy Starting With %@&?~ Chinese PCB
  218. Question about output transformers.
  219. NEETS & Kirchhoff , I'm stuck
  220. Reviving a late 50's el84-based hifi
  221. Need a 7K a-a
  222. Tube ID
  223. Anyone know what these are?
  224. Let's Talk About Grounding
  225. Tube Pre Amp DIY Schematic
  226. Rectifier choice
  227. power transformer fo single tube ecl82 amplifier
  228. Today's Version of The Williamson Amp
  229. what's wrong with my calculations?
  230. Phono stage design considerations part 1: choosing 1st stage tube
  231. Can anyone suggest a practical use for this gauge on a tube amp
  232. Completed my 829 PPP w/ pmillet's driver pcb's.
  233. adding input transformer to Sony sra-2 tube preamp
  234. 6P45S 50W mono block tube amplifier
  235. Is it possible to drive 4xKT88PP with an AC coupled LTP PI?
  236. curious answer from CommonSense Audio
  237. Local Feedback for Push Pull Pentode
  238. Hickok Tv-7D/U A Setting not working
  239. Exotic interstage transformers
  240. DAC & Tube Preamp, Elevated Heater Question
  241. This Schematic Sounds Great
  242. Most Exotic MM phono preamplifier
  243. Fast track or How to utilize two 3-hole chassis for 20W+ monoblocks
  244. Strange noises on my Aikido power on
  245. lost capacitance
  246. Best SE KT66 schematic?
  247. Mixing old and new tubes
  248. Mullard 3 Tube 3 watt amplifier Question
  249. Darling Pre-amplifier using WCF for 1626's
  250. Is my tube broken? Which one should replace it?

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