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  1. Sophia 300B+ carbon
  2. Capacitor Temperature
  3. PL519 amp SE
  4. C3g Headphone design - will this work?
  5. Luxman 2A3 amp SE
  6. Capacitor on Aikido Power Supply Sampling Circuit
  7. Well, what have I done now?
  8. Aikido CF cathode resistor?
  9. D3A - 6P45S/El519 SE "The staircase" my first h-end amplifier.
  10. SET Cathode Biased vs. Fixed Bias?
  11. JAN6418 pre-amp advise
  12. SOHA II amp tripping
  13. 6JN6 LTspice model?
  14. unusual output transformers, what are they for?
  15. Cheap power amp kit with 6N2 + 6P3
  16. KT88 AMP I'm not sure about power supply
  17. buzz from tubes
  18. Good Power Supply??
  19. HK guitar amp - help with repair
  20. Audio Research SP6C
  21. Junk Audio Project (pics)
  22. SE SV83 Paralled Tube Amplifer
  23. Hum in SVP preamp circuit
  24. Advice/tips on tube preamplifier wanted
  25. Transformer Windfall. Now what?
  26. I am being cautious - need to install a ground plug
  27. My first scratch build (6AQ5 SE)....
  28. Pop, Pop, Pop, Pop, Pop
  29. what is this valve? and what is it for??
  30. Lazarus cascade basic preamp
  31. Seperate Power Supply Chassis and Grounding
  32. How To Solder Tips and Tricks
  33. Another CD player tube mod, TDA1541 with transformers and triode cathode followers
  34. PCL86 - Worth a try?
  35. Audio use 3D6/1299 ?
  36. How HOT should a LM317 get?
  37. KT88 amp questions
  38. Restoring a Motorola HS-1048A amp
  39. Please look at this schematic and tells me what have went wrong
  40. Lacking bass response after re-cap
  41. Generate a negative bias voltage?
  42. hammond 369ex instead of 269ex
  43. Recapped a pair of monoblocks
  44. Top Secret!
  45. Toggle or Rotary Switch for Phono Inputs
  46. Flexible tube (or SS) electronic XO
  47. LAVATORY - Lamp Valve Transistor Hybrid (will this work?)
  48. Transformer revers use question
  49. Fixed bias, cathode feedback?
  50. spudnik, spudMiG ?
  51. I need the KT120 base dimensions
  52. Need help with chassis layout.
  53. tube amp ID ?
  54. GU50 filaments voltage!
  55. Does anybody have an RCA RS171 Schematic
  56. Opinions wanted: Low Z SE power supplies
  57. DC heaters, best way to bias ?
  58. Ignition coil as SE OPT
  59. Opt color code identification (Onetics)
  60. Drawback to Larger Capacity Output Transformer Than Required?
  61. Send me some pictures of your amps
  62. leak stereo 60
  63. B2 Spice V5.0
  64. Mains Fuse and Switch Best Practice
  65. Identify these vintage tube amp rivets
  66. RCA ORTHOPHONIC LMI-32216A manual copy needed
  67. Question on strange 6l6 schematic symbols
  68. Resistor value?
  69. Paper / plastic hybrid capacitor
  70. ST70 chassis polishing
  71. Octal to RCA
  72. KT120 plate load for 150+watts
  73. Need a copy of Aikido 5687 manual pdf
  74. Nutshell Raven Headphone amp with balanced I/O
  75. Bartolucci: beware of him !!!
  76. Finding plate resistance
  77. Pleides Tube only headphone amp
  78. I think I know what I want (seasoned advice)
  79. CCS filament supply vs inductors for DHT
  80. Cap outer foil low impedance help...
  81. Distorted low end SE micro amp
  82. LM3886 + ECC82/12AU7
  83. My LCR phono with HUM....
  84. Winter 2A3 SET project.
  85. 6BQ5 pp with LM317 ccs
  86. maratz 7 clone
  87. Music Angel pre-amplifier - few modifications
  88. Transformer Questions (1st Amp Project)
  89. Morgan Jones and PS Bypass Caps
  90. Ruby Tuby at 24V?
  91. Budget Iron for Low-Power SET
  92. Output transformer mounting questions
  93. 3c24 preamp?
  94. Newb Q - JE Simple 2A3 as Monoblocks
  95. Vacuum tube amp design
  96. Counterpoint SA7.1 circuit question
  97. Variable Gain Control Topology
  98. Unknown amplifier, anyone recognice it?
  99. Harman Kardon "The Lute" A-220 - Repair manual?
  100. G2 input grid 6DQ6 push pull
  101. Schade SE 6550
  102. Heathkit aa-23 fix up
  103. 6SN7 Line Stage w/ Tone Controls
  104. Octal Heaven??
  105. how do i reach Chris the georgetown technician?
  106. mu follower bootstrap cap value
  107. POLL: The Legendary Williamson Amp Modified By SY
  108. 5Y3 PSU Question
  109. jolida 302b sweet sounding amp vs Audio Innovations 500
  110. MFA M120 any personal experience values and reviews?
  111. Scott 233D one channel bad - Next Project?
  112. Quickie GLA Tube Amp - whats the 1 ohm setting for?
  113. This Look Right?
  114. SIMPLE KIT with step by step instruction
  115. Ultra Simple PP ECC99?
  116. Heathkit Audio Analyzer
  117. The Best Valve Amp Design In Modern Time: Poll Candidates
  118. Current Requirements for Power Tubes
  119. Thermionic generator (Triode) appears to be real this time...
  120. Choosing Tube + OPT for preamp
  121. My first preamp with tubes
  122. Another New Guy Starting With %@&?~ Chinese PCB
  123. Question about output transformers.
  124. NEETS & Kirchhoff , I'm stuck
  125. Reviving a late 50's el84-based hifi
  126. Need a 7K a-a
  127. Tube ID
  128. Anyone know what these are?
  129. Let's Talk About Grounding
  130. Tube Pre Amp DIY Schematic
  131. Rectifier choice
  132. power transformer fo single tube ecl82 amplifier
  133. Today's Version of The Williamson Amp
  134. what's wrong with my calculations?
  135. Phono stage design considerations part 1: choosing 1st stage tube
  136. Can anyone suggest a practical use for this gauge on a tube amp
  137. Completed my 829 PPP w/ pmillet's driver pcb's.
  138. adding input transformer to Sony sra-2 tube preamp
  139. 6P45S 50W mono block tube amplifier
  140. Is it possible to drive 4xKT88PP with an AC coupled LTP PI?
  141. curious answer from CommonSense Audio
  142. Local Feedback for Push Pull Pentode
  143. Hickok Tv-7D/U A Setting not working
  144. Exotic interstage transformers
  145. DAC & Tube Preamp, Elevated Heater Question
  146. This Schematic Sounds Great
  147. Most Exotic MM phono preamplifier
  148. Fast track or How to utilize two 3-hole chassis for 20W+ monoblocks
  149. Strange noises on my Aikido power on
  150. lost capacitance
  151. Best SE KT66 schematic?
  152. Mixing old and new tubes
  153. Mullard 3 Tube 3 watt amplifier Question
  154. Darling Pre-amplifier using WCF for 1626's
  155. Is my tube broken? Which one should replace it?
  156. What Exactly Is Voltage Drop
  157. simplex (6c33c se amp) and stabilized current
  158. Transformers with dual primaries?
  159. Building the VTA, tubes4hifi PH16 Phono Stage
  160. K&E Preamplifier
  161. 12ax7:top psvane or top shuguang?
  162. Software To Help Design Tube Amplifier
  163. How can I drop B+ Voltage
  164. Eico HF-60's power supply.
  165. Need help with Output Transformer for EL84
  166. Where to reference filaments to ground?
  167. Maratnz 9 irons
  168. Noisy re-purposed MOT
  169. Mullard HQ Stereo Amp - Transformers Question
  170. C3g triode-strapped linearity question
  171. Making tube Rp disappear now
  172. 6E5P Connection Question
  173. Push Pull stereo amp bridged to monoblock operation
  174. Mr Blohbaum's Multiplied Transconductance Amp
  175. Vintage output transformer ID
  176. Getting Rid of Some Stickys
  177. Grid is Referenced To Ground through resistor? WHAT?
  178. Problem with CCSIC in Tubelab SE
  179. AP testing of the 6L6 SE
  180. output impedance
  181. 11BM8 heater wiring question
  182. Lower AC ripple on one side of coupling cap than the other side?
  183. HELP!! K12G Valve kit transformer
  184. 4 x EL34 or 2 x 6550 in a pp amp
  185. 5965 Telefunken tube U mh CO label ?
  186. 845 IT couple amp
  187. What makes an output tube "run away"
  188. P. Millett Engineers Amplifier
  189. Biasing problem
  190. Direct coupled driver stage - bias design
  191. Monoblock project
  192. Series DC Heater chain
  193. Tranformer advice for small powered amp.
  194. Circuit for testing tube/valve - Help!
  195. new Tubes for MHZS 33
  196. Teeny Tiny Spud
  197. Paging Andy Bartha
  198. 6ak5 / 5654 tubes in Kuala Lumpur, Malaysia
  199. aikido octal all-in-one manual
  200. Conrad Johnson MV75 help needed
  201. Leak tl12+ ECC81
  202. Kuba Serenade Stereo Console - Part II - New development - amp debug question
  203. Amperex AX569
  204. Marconi tube ID help
  205. ST-70 Input Stage, Explained For Extreme Beginners
  206. heaters connected to cathode?!
  207. HK Citation I rebuild question.
  208. tube 4-125A design
  209. Mod FISHER 100AZ-balanced input!?
  210. Akidio PS-17 CLC Resistance Value Choices
  211. More questions on parallel push-pull
  212. Inputs needed for Power Transformer Design!
  213. seeking advice about Welborne Labs kit
  214. 2A3 Design: Real World Gain Question
  215. 6M11 push-pull spud amp
  216. My first Console mod - Class is in session
  217. Wright Sound WPA 3.5 Power Transformer Replacement Options
  218. DF 96 tube
  219. S.A.C.T valve transformers
  220. Very strange....
  221. Advice Needed on PSU Over voltage
  222. Griffin G170 schematic needed
  223. Funny comment about the religion of SE
  224. calculate needed wattage for output transformer
  225. AP1 tube preamp assistance needed,please?
  226. 6AN8 or ECF80 ?
  227. Simple Cheap Amp Using 6l6 and/or 12ax7?
  228. Which Tube Amp Kit Sounds Best
  229. Push Pull 6HJ5 Monoblocks
  230. 100 V transformers
  231. unstable right channel
  232. Aikido 9 pin tubes for 2a3
  233. preamp kit
  234. 71a DHT Pre - MV Rectifier, Batteries, and TVC's
  235. Build ideas? New tube amp find and I'd like some input please.
  236. OB2 SPICE model
  237. Push pull - driver tube plate voltage
  238. Voltage Doubler Caps
  239. Morgan Jones Regulator - Questions
  240. Gu-50 SE Amp , quick question...
  241. Tube Amp Open Circuit Protection
  242. 6CU6 Sweep Tube Monoblock Power Amp Build Log
  243. je labs type 76 preamp build!
  244. Any Tube Designers Out There: Money For You
  245. Output Transformer Questions
  246. cathode bias redplate question
  247. eyelets and radial capacitors
  248. Help with MiniBlok II
  249. Reading Sovtek Date Codes
  250. ECF or PCF80 as a headphone amp

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