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  1. SET Cathode Biased vs. Fixed Bias?
  2. JAN6418 pre-amp advise
  3. SOHA II amp tripping
  4. 6JN6 LTspice model?
  5. unusual output transformers, what are they for?
  6. Cheap power amp kit with 6N2 + 6P3
  7. KT88 AMP I'm not sure about power supply
  8. buzz from tubes
  9. Good Power Supply??
  10. Audio Research SP6C
  11. Junk Audio Project (pics)
  12. SE SV83 Paralled Tube Amplifer
  13. Hum in SVP preamp circuit
  14. Advice/tips on tube preamplifier wanted
  15. Transformer Windfall. Now what?
  16. I am being cautious - need to install a ground plug
  17. My first scratch build (6AQ5 SE)....
  18. Pop, Pop, Pop, Pop, Pop
  19. what is this valve? and what is it for??
  20. Lazarus cascade basic preamp
  21. Seperate Power Supply Chassis and Grounding
  22. How To Solder Tips and Tricks
  23. Another CD player tube mod, TDA1541 with transformers and triode cathode followers
  24. PCL86 - Worth a try?
  25. Audio use 3D6/1299 ?
  26. How HOT should a LM317 get?
  27. KT88 amp questions
  28. Restoring a Motorola HS-1048A amp
  29. Please look at this schematic and tells me what have went wrong
  30. Lacking bass response after re-cap
  31. Generate a negative bias voltage?
  32. hammond 369ex instead of 269ex
  33. Recapped a pair of monoblocks
  34. Top Secret!
  35. Toggle or Rotary Switch for Phono Inputs
  36. Flexible tube (or SS) electronic XO
  37. LAVATORY - Lamp Valve Transistor Hybrid (will this work?)
  38. Transformer revers use question
  39. Fixed bias, cathode feedback?
  40. spudnik, spudMiG ?
  41. I need the KT120 base dimensions
  42. Need help with chassis layout.
  43. tube amp ID ?
  44. GU50 filaments voltage!
  45. Does anybody have an RCA RS171 Schematic
  46. Opinions wanted: Low Z SE power supplies
  47. DC heaters, best way to bias ?
  48. Ignition coil as SE OPT
  49. Opt color code identification (Onetics)
  50. Drawback to Larger Capacity Output Transformer Than Required?
  51. Send me some pictures of your amps
  52. leak stereo 60
  53. B2 Spice V5.0
  54. Mains Fuse and Switch Best Practice
  55. Identify these vintage tube amp rivets
  56. RCA ORTHOPHONIC LMI-32216A manual copy needed
  57. Question on strange 6l6 schematic symbols
  58. Resistor value?
  59. ST70 chassis polishing
  60. Octal to RCA
  61. KT120 plate load for 150+watts
  62. Need a copy of Aikido 5687 manual pdf
  63. Nutshell Raven Headphone amp with balanced I/O
  64. Bartolucci: beware of him !!!
  65. Finding plate resistance
  66. Pleides Tube only headphone amp
  67. I think I know what I want (seasoned advice)
  68. CCS filament supply vs inductors for DHT
  69. Cap outer foil low impedance help...
  70. Distorted low end SE micro amp
  71. LM3886 + ECC82/12AU7
  72. My LCR phono with HUM....
  73. Winter 2A3 SET project.
  74. 6BQ5 pp with LM317 ccs
  75. Marantz 7 clone
  76. Music Angel pre-amplifier - few modifications
  77. Transformer Questions (1st Amp Project)
  78. Morgan Jones and PS Bypass Caps
  79. Ruby Tuby at 24V?
  80. Budget Iron for Low-Power SET
  81. Output transformer mounting questions
  82. 3c24 preamp?
  83. Newb Q - JE Simple 2A3 as Monoblocks
  84. Vacuum tube amp design
  85. Counterpoint SA7.1 circuit question
  86. Variable Gain Control Topology
  87. Unknown amplifier, anyone recognice it?
  88. Harman Kardon "The Lute" A-220 - Repair manual?
  89. G2 input grid 6DQ6 push pull
  90. Schade SE 6550
  91. Heathkit aa-23 fix up
  92. 6SN7 Line Stage w/ Tone Controls
  93. Octal Heaven??
  94. how do i reach Chris the georgetown technician?
  95. mu follower bootstrap cap value
  96. POLL: The Legendary Williamson Amp Modified By SY
  97. 5Y3 PSU Question
  98. jolida 302b sweet sounding amp vs Audio Innovations 500
  99. MFA M120 any personal experience values and reviews?
  100. Scott 233D one channel bad - Next Project?
  101. Quickie GLA Tube Amp - whats the 1 ohm setting for?
  102. This Look Right?
  103. SIMPLE KIT with step by step instruction
  104. Ultra Simple PP ECC99?
  105. Heathkit Audio Analyzer
  106. The Best Valve Amp Design In Modern Time: Poll Candidates
  107. Current Requirements for Power Tubes
  108. Thermionic generator (Triode) appears to be real this time...
  109. Choosing Tube + OPT for preamp
  110. My first preamp with tubes
  111. Another New Guy Starting With %@&?~ Chinese PCB
  112. Question about output transformers.
  113. NEETS & Kirchhoff , I'm stuck
  114. Reviving a late 50's el84-based hifi
  115. Need a 7K a-a
  116. Tube ID
  117. Anyone know what these are?
  118. Let's Talk About Grounding
  119. Tube Pre Amp DIY Schematic
  120. Rectifier choice
  121. power transformer fo single tube ecl82 amplifier
  122. Today's Version of The Williamson Amp
  123. what's wrong with my calculations?
  124. Phono stage design considerations part 1: choosing 1st stage tube
  125. Can anyone suggest a practical use for this gauge on a tube amp
  126. Completed my 829 PPP w/ pmillet's driver pcb's.
  127. adding input transformer to Sony sra-2 tube preamp
  128. 6P45S 50W mono block tube amplifier
  129. Is it possible to drive 4xKT88PP with an AC coupled LTP PI?
  130. curious answer from CommonSense Audio
  131. Local Feedback for Push Pull Pentode
  132. Hickok Tv-7D/U A Setting not working
  133. Exotic interstage transformers
  134. DAC & Tube Preamp, Elevated Heater Question
  135. This Schematic Sounds Great
  136. Most Exotic MM phono preamplifier
  137. Fast track or How to utilize two 3-hole chassis for 20W+ monoblocks
  138. Strange noises on my Aikido power on
  139. lost capacitance
  140. Best SE KT66 schematic?
  141. Mixing old and new tubes
  142. Mullard 3 Tube 3 watt amplifier Question
  143. Darling Pre-amplifier using WCF for 1626's
  144. Is my tube broken? Which one should replace it?
  145. What Exactly Is Voltage Drop
  146. simplex (6c33c se amp) and stabilized current
  147. Transformers with dual primaries?
  148. Building the VTA, tubes4hifi PH16 Phono Stage
  149. K&E Preamplifier
  150. 12ax7:top psvane or top shuguang?
  151. Software To Help Design Tube Amplifier
  152. How can I drop B+ Voltage
  153. Eico HF-60's power supply.
  154. Need help with Output Transformer for EL84
  155. Where to reference filaments to ground?
  156. Maratnz 9 irons
  157. Noisy re-purposed MOT
  158. Mullard HQ Stereo Amp - Transformers Question
  159. C3g triode-strapped linearity question
  160. Making tube Rp disappear now
  161. 6E5P Connection Question
  162. Push Pull stereo amp bridged to monoblock operation
  163. Mr Blohbaum's Multiplied Transconductance Amp
  164. Vintage output transformer ID
  165. Getting Rid of Some Stickys
  166. Grid is Referenced To Ground through resistor? WHAT?
  167. Problem with CCSIC in Tubelab SE
  168. AP testing of the 6L6 SE
  169. output impedance
  170. 11BM8 heater wiring question
  171. Lower AC ripple on one side of coupling cap than the other side?
  172. HELP!! K12G Valve kit transformer
  173. 4 x EL34 or 2 x 6550 in a pp amp
  174. 5965 Telefunken tube U mh CO label ?
  175. 845 IT couple amp
  176. What makes an output tube "run away"
  177. P. Millett Engineers Amplifier
  178. Biasing problem
  179. Direct coupled driver stage - bias design
  180. Monoblock project
  181. Series DC Heater chain
  182. Tranformer advice for small powered amp.
  183. Circuit for testing tube/valve - Help!
  184. new Tubes for MHZS 33
  185. Teeny Tiny Spud
  186. Paging Andy Bartha
  187. 6ak5 / 5654 tubes in Kuala Lumpur, Malaysia
  188. aikido octal all-in-one manual
  189. Conrad Johnson MV75 help needed
  190. Leak tl12+ ECC81
  191. Kuba Serenade Stereo Console - Part II - New development - amp debug question
  192. Amperex AX569
  193. Marconi tube ID help
  194. ST-70 Input Stage, Explained For Extreme Beginners
  195. heaters connected to cathode?!
  196. HK Citation I rebuild question.
  197. tube 4-125A design
  198. Mod FISHER 100AZ-balanced input!?
  199. Akidio PS-17 CLC Resistance Value Choices
  200. More questions on parallel push-pull
  201. Inputs needed for Power Transformer Design!
  202. seeking advice about Welborne Labs kit
  203. 2A3 Design: Real World Gain Question
  204. 6M11 push-pull spud amp
  205. My first Console mod - Class is in session
  206. Wright Sound WPA 3.5 Power Transformer Replacement Options
  207. DF 96 tube
  208. S.A.C.T valve transformers
  209. Very strange....
  210. Advice Needed on PSU Over voltage
  211. Griffin G170 schematic needed
  212. Funny comment about the religion of SE
  213. calculate needed wattage for output transformer
  214. AP1 tube preamp assistance needed,please?
  215. 6AN8 or ECF80 ?
  216. Simple Cheap Amp Using 6l6 and/or 12ax7?
  217. Which Tube Amp Kit Sounds Best
  218. Push Pull 6HJ5 Monoblocks
  219. 100 V transformers
  220. unstable right channel
  221. Aikido 9 pin tubes for 2a3
  222. preamp kit
  223. 71a DHT Pre - MV Rectifier, Batteries, and TVC's
  224. Build ideas? New tube amp find and I'd like some input please.
  225. OB2 SPICE model
  226. Push pull - driver tube plate voltage
  227. Voltage Doubler Caps
  228. Morgan Jones Regulator - Questions
  229. Gu-50 SE Amp , quick question...
  230. Tube Amp Open Circuit Protection
  231. 6CU6 Sweep Tube Monoblock Power Amp Build Log
  232. je labs type 76 preamp build!
  233. Any Tube Designers Out There: Money For You
  234. Output Transformer Questions
  235. cathode bias redplate question
  236. eyelets and radial capacitors
  237. Help with MiniBlok II
  238. Reading Sovtek Date Codes
  239. ECF or PCF80 as a headphone amp
  240. 60 Watt Mono Build
  241. Amp for Klipsch Heresy
  242. The ultimate 300B
  243. Stage gain and cascading
  244. NOS Tube Socket Question
  245. 75 Watt/Channel Monoblock Custom Amp
  246. Wiring variac
  247. 1SH29B russian miniature tube - useful for audio?
  248. Humming in PP EL84 Tubes aMP.
  249. Repurposing a Tube Reel to Reel
  250. YaQin MC-10L Vs ST70: Sound Quality

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