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  1. 300B amp PS optimization?
  2. Different value for .47uf coupling cap
  3. Old Olympic audio tube amp
  4. What Design to Use?
  5. KT90's anyone using'em ?
  6. What are they?
  7. Replace el34 with 6p3s
  8. Advice on 6V6 push pull Parallel
  9. squealing output transformer
  10. Melos Sha Gold
  11. Ways to Lower B+ in a Tube Rectifed PS
  12. Oregon Electronics D6 HV supplies: info needed please
  13. My version of the Vacuum State FVP5
  14. Diy Tube Phono Preamp
  15. double check the math
  16. Kitparts line stage
  17. Aikido tube heater floating
  18. Cathode and other types of feedback
  19. Tube God TH-1 Amp Regulator PCB ????
  20. step-up travel transformer for small preamp?
  21. Help a total tube amp newbie find a super simple design...
  22. heretical unity gain and ccs question
  23. Vox tubes glowing red hot
  24. What To Do
  25. Parallel Two Tubes
  26. 4 x PSE EL34
  27. EL34 CCS help
  28. Tube curve tracer project
  29. Single Ended EL-34?
  30. maxi tube tester?
  31. Zener Bias
  32. Looking to build a tube amp.
  33. Tube humming question
  34. YAPPAP (Yet Another Push-Pull Amplifier Project)
  35. voltage output dac ==> TUBE
  36. Heater switch transistor
  37. Anything post power transformer that can cause it to hum / buzz?
  38. Aikido enclosure
  39. Power Transformers. Decisions
  40. First tube after IV
  41. Suggestions for Upgrade - VDV70/100
  42. New Hybrid Output Stage and booster for SE Amp
  43. Pro and cons high DCR filter choke
  44. do-it yourself leslie help
  45. John Broskie Aikido boards
  46. Making a muscular triode monoblock amplifier using P-P Eimac 450TH's
  47. Limited run PCBs - where's copyright???
  48. Hammond Amp Question
  49. Impedance matching
  50. 6111 output for CD player - opinions - some help?
  51. Sensitivity Limiter - Bogen Mx-30a
  52. Are my speakers efficient enough for tubes?
  53. Ping Sy: LED for Cathode Bias
  54. PSU capacitors/electrolytics
  55. 2A3 monoblock power supply
  56. 2 tube questions
  57. Just acquired HEATHKIT W4-AM-*picture*
  58. Passive line stage with tubes
  59. My favorite preamp
  60. Again, a preamp tube choice.
  61. Class Double A
  62. Two Stereo Tube Amps Into Monoblocks
  63. Multi-purpose tube amp (line and guitar inputs)
  64. Espey AM/FM radio (pentagrid mixer, etc.)
  65. Need help for DIY EL34PP tube amp
  66. Higher value oil capacitors?
  67. Transconductance.
  68. 5763 tetrode on OTL ?
  69. cornford harlequin
  70. Need help: 5687 tubes and heat dissipation
  71. Tube preamp, tone control problem
  72. Use 5KV transformer as output transformer?
  73. Any EL84 alternatives?
  74. help on id of tubes
  75. Sovtek 6CA7-EH Producing smoke...
  76. building V4's and phono pre
  77. pre out on a integrated tube amp?
  78. 6SN7 some good some bad
  79. Phono pre amp - thanks SY
  80. 6c33c Tube preamp
  81. Tubes for Lumley ST40 power amplifier?
  82. Plate supply of Conrad Johnson PV-5 ?
  83. 6CD6GA in Enhanced Triode Mode for SE Amp
  84. Fender 6G15 clone
  85. Gridstoppers against RF, a necessity ?
  86. where do I.E.T. tubes come from
  87. I wanna DIY a PP 6550 Guitar Setup
  88. Hum 300b Again
  89. Pse El34
  90. Mcintosh MR65 Tube Tuner
  91. Problem: Really Bright glowing 6CA7
  92. New member introduction & question
  93. The "PowerTotem"... a new way to SET?
  94. Please advice on KT88 Push Pull
  95. console "guitar amp" part 2
  96. Odd's n Ends Revisited 6V6 SE amp
  97. Bottlehead Foreplay with chipamp
  98. Next Amp: 2a3PSE, 300B or KT88SE UL
  99. transformer list
  100. do 300b amps really sound any good?
  101. Capacitance For Mono Block Design
  102. pilot 264
  103. Octal equivalents for 6C45?
  104. lm3875 chipamp and tube pre loud buzzing
  105. Using a spdt switch to select between triode mode and pentode mode on a guitar amp.
  106. 32 ohm bass amp.
  107. PSE UL EL84 or 6V6 or EL34?
  108. Paraphase Splitter - why is it unpopular?
  109. Tubed IR spectrophotometer
  110. Very Basic 12AX7 Heater Question
  111. 6072A/12AY7 for an AKG C12 Microphone
  112. SET Suggestions
  113. Will ccs work with a DHT?
  114. Resistor type and power rating
  115. tube patents
  116. Why use E182CC?
  117. tube
  118. understanding transformer codes
  119. Maida regulator, these results expected?
  120. Moto chassis pulled! pics!
  121. glasshouse kit amps. Any good?
  122. class B
  123. a.r.t. mpa tube pre amp
  124. Upper and lower triode in E88CC
  125. Booster Amps
  126. Help on Magnavox Paraphase (Gabevee?)
  127. New stock pre -amp tubes. Whats good?
  128. CV2492 / 6922 / E88CC
  129. HK Citation II Bias "issues"
  130. 3k vs. 5k transformer for PP 2A3
  131. Turret terminal board for line stage construction?
  132. Tube Cage Question
  133. Small and easy ESL amp
  134. SOVTEK 6550WE's any good?
  135. power tube for drivers
  136. 12B4A line driver/preamp
  137. Question about tube amp power supply caps
  138. Why separate AC heater supplies for driver and power tubes?
  139. Using one half of double triode
  140. huh ?
  141. holy cow, this sounds nice
  142. my SY CCS is only giving me 15mA
  143. Changing filter cap in HH Scott
  144. Why Class AB is bad
  145. Problem, please help !!!!!!
  146. Eico hf-30 reworking
  147. KT88 Bias Adjustment
  148. Interstage Distortion Measurements
  149. Survey: Aikido distortion
  150. Loftin-White Mod
  151. Music Angel EL34
  152. How much filtering required for DC heaters?
  153. What is the best input/driver for 2A3 SE?
  154. tube kits....
  155. !2ax7 heater wiring? Series / parallel?
  156. Shunt regulator
  157. Trying to choose a project...
  158. Old Projector amp conversion project
  159. Experiences with TJ Mesh Plate DHT's
  160. The lost Millman Seely chapters on audio amps
  161. Individual fixed bias and transf coupling
  162. Transmitter e-tour
  163. 7984
  164. Screen driven EL36 / 6CM5 /PL36 /25E5
  165. Clone Marantz 7C power supply
  166. On - board supply ?
  167. Name that EL34!
  168. How much plate voltage for 6N1P's?
  169. minimalist valve pre for follower
  170. Schematic opinion needed (guitar amp)
  171. Tube availability: what would you do?
  172. Silvertone 1472 Makeover
  173. Looking for EL32 schematic
  174. oil bath cooling for tubes?
  175. Aikido Crackle Hiss Noise Solved
  176. Mini-p1 tweaks
  177. Refried Power Supply?
  178. The Edcor meets the 6AV5
  179. old console radio as guitar amp
  180. Anyone have curves for a 5HC7?
  181. Any common cathode (grounded grid) schematics?
  182. SIMPLE tube amplifier for...dummy guy...
  183. ground and earth
  184. Tube Cad Journal dead
  185. First amp
  186. 6922 direct coupled to 2A3
  187. Ok guys, get your daggers out.......
  188. How would you build a hybrid LM3xxx amp?
  189. Tade no tube amp!
  190. Sherwood 5500
  191. Most accurate way of matching triodes ?
  192. Help Identify This AMP!
  193. Old Tube Equipment Turnon
  194. Current Sourced Cathode Follower
  195. Tube Tester Data
  196. noob pre/pwer amp recording ?s
  197. Anyone heard of "in-rush" limiter resistor
  198. Will adding a 10H/125mA choke hurt bass performance
  199. Fixed bias vs. auto bias
  200. Not your average output transformer problem
  201. Balanced Audio Technology VK 3i preamplifier
  202. Musical Fidelity X10-D - changing tubes problem
  203. power transformers in series
  204. Loud sudden rumbling when turn on amp
  205. Help with tube amplification?
  206. UTC CG-431 Terminal Arrangement
  207. Mingda MC34B tweaks
  208. Symphonic Line Die Erleuchtung Reference
  209. 6SL7 Diffamp front end
  210. PT/OPT Orientation questions
  211. Effect of using 50k pot instead of 100k pot in tube preamp?
  212. Using the Crowhurst articles and Claus Byrith
  213. 12SX7
  214. Bridge SE amplifier
  215. Cad Sw
  216. Kit amps in the UK
  217. ECC82 based preamp
  218. How important is the coupling cap?
  219. any pcb layout for marshall standard 50w valve amp ?
  220. pentode driven 300b set amp - any info?
  221. Circlotron Preamp with ECC88.
  222. Removing tone controls - Need a little help
  223. SE EL84 amplifier schematics
  224. Output coupling - Choke-coil method?
  225. 7788 tube mic preamp design
  226. Amperex 6085 Tube- Where to Buy?
  227. Can a 5687 drive four 813's in triode mode ?
  228. Schematics needed for Heathkit S33
  229. Tube Sparking
  230. Vacuum Tube Pre O.C.L.
  231. Why no single triode OTL power stages?
  232. 6922 .2 sections in parallel
  233. Pre-amp input remote control
  234. Any benefit to DC heater on parallel supply rectifier (GZ34)?
  235. Relpacing 6EU7s with 12AX7s - Good idea?
  236. These Valves good for anything?
  237. buzz problem
  238. Help with trafo
  239. Svetlana EL509 III tubes
  240. Noise on Aikido output
  241. Book “Single Ended Amplifiers” by John (not Gordon) Rankin
  242. EV4417 6CM5 (6x) P-P Amp Schematic
  243. Need recommendation for cathode bypass cap
  244. Simplest flea-powered amp?
  245. Decisions, Decisions - Help me select iron
  246. 966 mercury vapor rectifier
  247. Sound Practices CDs
  248. Question about DIY EL34PP amp
  249. noisy noisy noisy noisy noisy tube
  250. Help needed lowering B+ for DIY amp

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