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  1. 12.6vDC Heaters, looking for a shortcut
  2. Fisher 80-AZ bias milliamps?
  3. Can shed some light on this EL 34 schematic diagram
  4. Solid State Rectifier in Dynaco Tube Amp
  5. Big chassis designs!
  6. 12ax7 LP
  7. plitron output w/ cfb usage ideas
  8. 390 ohm should have been 390k ohm
  9. Advice sought re what tube power amp
  10. EL34 SED Winged C Black Prints: original??
  11. OPTx from Ogonowski
  12. Aikido cathode follower (ACF) with 12au7
  13. Ampeg vt60 tri ax (did it really exist?)
  14. SEP EL-34 to 6L6GC?
  15. Volume Pot Spec
  16. My Tube Pre-Amp Picking up an AM radio station?
  17. Philips 6SN7 GTA & GTB
  18. ST-120 Problem With Rectifier Tube
  19. New Yaqin VK-2100
  20. Electronic parts and sub-zero temperature
  21. Bendix 6384 as EL34: Experience anyone?
  22. Audioresearch LS2B schematic needed
  23. input noise - too simple - but need explaination
  24. Plate voltage with/without tube (for fine tune bias adjustemnt)
  25. Using trimmers / potentiometers to adjust tube operating points
  26. KT88 SED winged C tolerance tall for quad
  27. Power Transformer Tolerances
  28. 12E1 Ultra Linear
  29. Comparison KT150 versus KT120
  30. 6sn7: GT GTA GTB sono differences for HIFI
  31. Audio Research LS5 Power Supply Problem
  32. Vintage grundig vs. new Yaqin. Advice?
  33. 5AR4 PSU
  34. What tube is this ?
  35. Need Schematic
  36. Budget PP Iron: Transcendar or Edcor?
  37. Yaqin MC-10L buzz
  38. Transformer buzzing when filament section is loaded
  39. Grid Stopper v Grid Leak on el84
  40. 2.5V Heater Tranformer-Best to Use One Per Channel?
  41. Amp: KT88 push-pull shunt feedback output via p-channel fet
  42. My biggest fear....
  43. I've made an awful mess...
  44. Any input for a tube noob's first attempt? Flea Watt 12b4, 6dj8, low B+
  45. HV scope use
  46. Kolster-Brandes er30
  47. Buzz that goes away when input grounded.
  48. Hovland HP-100 tube replacement
  49. Dynaco ST-120 Turn On Pop or Problem
  50. Grounding two channel preamp sharing a psu.
  51. Convert hybrid amp to pure tube output?
  52. Please Help me with this tubes
  53. resistor maximum voltage rating
  54. 211- 6e5p full amp. The first setps
  55. E810F and general pentodes design question
  56. Pop goes the bias cap.
  57. High Power Single Ended Triode, Design
  58. Yaqin MS-6V6 vs. Markhill MS-6V6
  59. Schematic please: Luxman MQ-70?
  60. Aikido tube preamp with Tortuga LDR volume control
  61. Type 37 tube preamp
  62. Figuring out a KT88 datasheet?
  63. Power supply 260V for tube preamp
  64. Aikido Tube with Tortuga volume control project
  65. Adding a pre out to amp
  66. One or two ECC82 for two channels (crosstalk)!
  67. Red Pilot (240)
  68. 77:1 Output Transformer Question
  69. Power transformer recommendation Kt88 SE and JE labs Riaa
  70. Tube output power for OPT calculation
  71. 6sn7 tube anode folower question?????
  72. Goldox 9300
  73. good quality/sounding preamp advice
  74. PL84 schematic question.
  75. YouTube Video: 12AX7 comparisons.
  76. How many volts ???
  77. Greetings all/ (newbie) Need Advice!
  78. Psud and Single Ended Amplifier
  79. Socket Combiniations
  80. From Potentiometer to Stepped Attenuator
  81. No need for bleed resistors on Fisher 90-T
  82. Sophia 300B+ carbon
  83. Capacitor Temperature
  84. PL519 amp SE
  85. C3g Headphone design - will this work?
  86. Luxman 2A3 amp SE
  87. Capacitor on Aikido Power Supply Sampling Circuit
  88. Well, what have I done now?
  89. Aikido CF cathode resistor?
  90. D3A - 6P45S/El519 SE "The staircase" my first h-end amplifier.
  91. SET Cathode Biased vs. Fixed Bias?
  92. JAN6418 pre-amp advise
  93. SOHA II amp tripping
  94. 6JN6 LTspice model?
  95. unusual output transformers, what are they for?
  96. Cheap power amp kit with 6N2 + 6P3
  97. KT88 AMP I'm not sure about power supply
  98. buzz from tubes
  99. Good Power Supply??
  100. HK guitar amp - help with repair
  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. Paper / plastic hybrid capacitor
  151. ST70 chassis polishing
  152. Octal to RCA
  153. KT120 plate load for 150+watts
  154. Need a copy of Aikido 5687 manual pdf
  155. Nutshell Raven Headphone amp with balanced I/O
  156. Bartolucci: beware of him !!!
  157. Finding plate resistance
  158. Pleides Tube only headphone amp
  159. I think I know what I want (seasoned advice)
  160. CCS filament supply vs inductors for DHT
  161. Cap outer foil low impedance help...
  162. Distorted low end SE micro amp
  163. LM3886 + ECC82/12AU7
  164. My LCR phono with HUM....
  165. Winter 2A3 SET project.
  166. 6BQ5 pp with LM317 ccs
  167. maratz 7 clone
  168. Music Angel pre-amplifier - few modifications
  169. Transformer Questions (1st Amp Project)
  170. Morgan Jones and PS Bypass Caps
  171. Ruby Tuby at 24V?
  172. Budget Iron for Low-Power SET
  173. Output transformer mounting questions
  174. 3c24 preamp?
  175. Newb Q - JE Simple 2A3 as Monoblocks
  176. Vacuum tube amp design
  177. Counterpoint SA7.1 circuit question
  178. Variable Gain Control Topology
  179. Unknown amplifier, anyone recognice it?
  180. Harman Kardon "The Lute" A-220 - Repair manual?
  181. G2 input grid 6DQ6 push pull
  182. Schade SE 6550
  183. Heathkit aa-23 fix up
  184. 6SN7 Line Stage w/ Tone Controls
  185. Octal Heaven??
  186. how do i reach Chris the georgetown technician?
  187. mu follower bootstrap cap value
  188. POLL: The Legendary Williamson Amp Modified By SY
  189. 5Y3 PSU Question
  190. jolida 302b sweet sounding amp vs Audio Innovations 500
  191. MFA M120 any personal experience values and reviews?
  192. Scott 233D one channel bad - Next Project?
  193. Quickie GLA Tube Amp - whats the 1 ohm setting for?
  194. This Look Right?
  195. SIMPLE KIT with step by step instruction
  196. Ultra Simple PP ECC99?
  197. Heathkit Audio Analyzer
  198. The Best Valve Amp Design In Modern Time: Poll Candidates
  199. Current Requirements for Power Tubes
  200. Thermionic generator (Triode) appears to be real this time...
  201. Choosing Tube + OPT for preamp
  202. My first preamp with tubes
  203. Another New Guy Starting With %@&?~ Chinese PCB
  204. Question about output transformers.
  205. NEETS & Kirchhoff , I'm stuck
  206. Reviving a late 50's el84-based hifi
  207. Need a 7K a-a
  208. Tube ID
  209. Anyone know what these are?
  210. Let's Talk About Grounding
  211. Tube Pre Amp DIY Schematic
  212. Rectifier choice
  213. power transformer fo single tube ecl82 amplifier
  214. Today's Version of The Williamson Amp
  215. what's wrong with my calculations?
  216. Phono stage design considerations part 1: choosing 1st stage tube
  217. Can anyone suggest a practical use for this gauge on a tube amp
  218. Completed my 829 PPP w/ pmillet's driver pcb's.
  219. adding input transformer to Sony sra-2 tube preamp
  220. 6P45S 50W mono block tube amplifier
  221. Is it possible to drive 4xKT88PP with an AC coupled LTP PI?
  222. curious answer from CommonSense Audio
  223. Local Feedback for Push Pull Pentode
  224. Hickok Tv-7D/U A Setting not working
  225. Exotic interstage transformers
  226. DAC & Tube Preamp, Elevated Heater Question
  227. This Schematic Sounds Great
  228. Most Exotic MM phono preamplifier
  229. Fast track or How to utilize two 3-hole chassis for 20W+ monoblocks
  230. Strange noises on my Aikido power on
  231. lost capacitance
  232. Best SE KT66 schematic?
  233. Mixing old and new tubes
  234. Mullard 3 Tube 3 watt amplifier Question
  235. Darling Pre-amplifier using WCF for 1626's
  236. Is my tube broken? Which one should replace it?
  237. What Exactly Is Voltage Drop
  238. simplex (6c33c se amp) and stabilized current
  239. Transformers with dual primaries?
  240. Building the VTA, tubes4hifi PH16 Phono Stage
  241. K&E Preamplifier
  242. 12ax7:top psvane or top shuguang?
  243. Software To Help Design Tube Amplifier
  244. How can I drop B+ Voltage
  245. Eico HF-60's power supply.
  246. Need help with Output Transformer for EL84
  247. Where to reference filaments to ground?
  248. Maratnz 9 irons
  249. Noisy re-purposed MOT
  250. Mullard HQ Stereo Amp - Transformers Question

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