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  1. Universal audio / Avalon mic pre schematics
  2. Since transconductance amps has become so popular lately...
  3. Mecanical PSU hum
  4. help i.d. this amplifier
  5. Question about a hybrid PSU design
  6. 35Z5GT half-wave rectifier
  7. Best place to use 2 Jupiter Bee caps in tube amp?
  8. what rating for diode of 450Volts DC
  9. Telefunken 6L6GC ???????
  10. Why are my amps doing this?
  11. How to calculate the gain of an input-driver stage?
  12. 6L6 vs EL34
  13. protect your amps
  14. Snap Ring Octal Sockets
  15. Suitable operating point for 6SN7 as a differential driver ?
  16. Suitable rectifier
  17. 6N1P & SV83 mu stage driving 845?
  18. Has anyone built a transformer coupled preamp?
  19. Circuit diagram for RCA vintage 6BQ5 amplifier?
  20. Driver valve discussion
  21. Help to choose the tubes!
  22. Why hum in one channel only?
  23. DC heater noise WORSE than AC
  24. Rdh 4
  25. 900v B+ Silly time.
  26. tube rectifier arrangement
  27. Matrix Amp?
  28. Dynaco Stereo 70 amplifier
  29. Ultimate power switch?
  30. AC or DC current for 300B and 2A3 tube filaments ?
  31. 0.1uF @ 3000V Ceramic?
  32. Power Triodes in current production
  33. Anyone in the world identify eico trans?
  34. Mullard 5-20 in triode mode
  35. THX certification, or integrated near THX Quality,
  36. Feedback resistor on Baxandall tone stack?
  37. SE Pentode or PP Triode ?
  38. how does one "voice" a tube amp
  39. Musical fidelity Nu-Vista
  40. Tube substitutions in Heathkit W5M
  41. PSUD2 question
  42. 6L6 class A P-P CFB amp
  43. i have a matched pair of 3cx1000a7..
  44. Different silvering patterns on tube tops?
  45. Help with amp rebuild
  46. Mystery (to me) phase inverter?
  47. Biasing
  48. SE KT88 Amp
  49. Good design?
  50. Auto Biasing
  51. nuvistor MC step up
  52. Corian for tube amp?
  53. 6AQ5 Line stage?
  54. 6550 o/p stage
  55. Help with finding preamp schematic
  56. AVO data for 8417 (Quicksilver) tubes
  57. Any experience with this nice toroidal OT?
  58. 300B SE cathode feedback to grid?
  59. hummmmmmm?
  60. no bass makes pedro a whiny boy
  61. Iron, glass, sand and lead.
  62. Is this any good? Considerations
  63. 2A3 SET Output Transformer opinions/recommendations
  64. My 6C45 DC 6C41, advice wanted
  65. DIY valve
  66. A good SE project?
  67. who will build me this special "line tubeamp"
  68. PI filters
  69. Designing a simple dc filament supply?
  70. Rogers Cadett amp
  71. HI & a few words/questions ...
  72. 6d22s
  73. eBay
  74. Chassis layout for Stereo JE Labs 300BDX
  75. Output transformer help
  76. CAD Program for Tubes
  77. 801A/816 tubes wanted
  78. This little thing might save your life!
  79. What happens if I loose the cathode bias?
  80. beginners ecl82 power supply
  81. 2MHz, High voltage source?
  82. beginner's ecl82
  83. Handmade Electronics Metal Punches?
  84. EL34 types
  85. Spice Model 6CW4
  86. El/pl 519
  87. Euridice symetric to Amp?
  88. use of 6dj8 as driver on a direct coupled 2a3 se amp
  89. Western Electric 275A Schematic
  90. Where to source 833 power tube
  91. capacitor reactance
  92. Overvoltaging resistors
  93. EL84 Push Pull amp.
  94. Power supply load capacity
  95. Tube preamp problem
  96. E88C (6DL4/ 8255), any circuit for it?
  97. Is there a name for this drive method?
  98. 6BM8 Question
  99. Tube mic preamp/mixer
  100. Please cast your votes..or make a suggestion or 2
  101. RIAA in LTspice
  102. Parallel ECC82 comment please
  103. A push-pull amp i can live with
  104. Sub-miniature russian amp help
  105. Tube Optical-Isolation Unit
  106. MKP in the Powersupply.
  107. 6SN7-GTB Globe (Chinese)
  108. 12BH7 Specs
  109. Is this worth my time?
  110. choke value
  111. ipod + tubes
  112. Leak tl/25+ OPT selection
  113. Gabevee's Maggie (MAG1515)
  114. Can partial feedback be as effective as global fb for decent damping factor?
  115. Which trans wire is which?
  116. What's wrong with this tube?
  117. F: great sound control with ECC82
  118. 30W UL 6L6P-P amp
  119. 300B stereo SE amp and PP2A3 monoblocks
  120. 6S45P matching
  121. Inductors made for crossover in an amp?
  122. PX4 or AVO44 or AV044 based SETA
  123. power conditioning
  124. Microphone preamp with compressor
  125. Current production rectifiers
  126. mu stage help...
  127. Non-Polar caps to cathode bypass
  128. 5u4 / solid state switchable supply
  129. 12AX7 sound ... going with the trend
  130. 6L6 PP Design Recommendations?
  131. EL 34 30W ultra linear
  132. Convert Audion Silver Knight PP monos
  133. Too much gain
  134. The long lost linear gain stage
  135. Philco power tranny diagram/5u4 supply
  136. Kt88 Se
  137. supersize me, please. (powersupply)
  138. Seeking advice on "Circlotron" cross-coupled feedback OTL design
  139. Best 6CA7?
  140. ECC99 line preamp
  141. coupling caps???
  142. variable regulated negitive grid supply
  143. hum loop advice
  144. Against all odds...
  145. 6as7 se amp
  146. Help .. tube amplifier .. 1st !
  147. winding a toroidal pp output
  148. solid state Vs Tube Rectification
  149. Cryoed Tubes...what To Expect?
  150. I'm looking for 6H13C tubes
  151. Which ST-70 ?
  152. Some questions about Van Scoyoc X-coupled splitter
  153. Quicksilver 8417 bias runaway?
  154. Most effective use of valve pre & active xover
  155. Tube possibilities for 2.9k-ohm speaker?
  156. Help on Preamp Mute Switch
  157. Fixed bias supply problems...
  158. Help with VTL preamp...
  159. question about 811A and 572B
  160. Dual Stereo Cathode Folower Setup
  161. tube tester
  162. Audio Innovation 1000 SE
  163. 6as7 PP Schematic Help
  164. Newbie Question: Need help diagnosing a problem, tubes on, music fades out quickly
  165. 7591EH failure
  166. opt frequency response
  167. Anyone got any opinions on this?
  168. My ForePlay Processor Controlled Preamp
  169. Tube ghetto blaster ?
  170. Help trouble shooting
  171. "The Fisher" tube amp 7189 output tubes
  172. UTC output transformers specs
  173. Regulation options for 807 g2
  174. My Mullard 5/20
  175. KT88 power amp
  176. High voltage regulator
  177. Filament voltage ?
  178. Unity Gain Unbalanced to Balanced Phase Splitter
  179. Anyone know the g1-g2 capacitance of 6AU6?
  180. Any good Transformer or Tube manufactureres in India ?
  181. McMartin MA-20?
  182. Help with Jolida 302A
  183. need 13fd7 curves
  184. Drd Kt88?
  185. miniature tube amp
  186. 300B pp schematic found, what about it?
  187. Tube Output Stage
  188. se otl
  189. Toroidals as OPTs?
  190. Tube advice
  191. Understanding OPT primary Z and load matching.
  192. help with Optomal placement of output transformers.
  193. 50h B26
  194. Anyone know what this is?? Strange tube/ bulb.
  195. Please ID output transformer
  196. Cheap and Easy Tube Phono Preamp
  197. Carbon film vs metal film resistors in a stepped attenuator?
  198. Alps pots vs. TKD pots? TKD worth the extra$$?
  199. Opamp as tube driver: Protection ideas?
  200. Looking for schematics CROFT OTL APPARITION
  201. ISO (new Tango) info...
  202. Noob Question on Driver Stages
  203. High Voltage Reference
  204. DIY valve amp
  205. Inverted Interstage Transformer
  206. regarding to the design of iron-cored inductors (chokes)
  207. Trying to find an amp
  208. 12v tube output stage for cs43122 based dac?
  209. Wattages & Loudness: ?I'm Lost?
  210. cmrr of common cathode
  211. The Next Step. (and budget tube amplifier kits/designs).
  212. non-diy amplifiers with choke input power supplies
  213. Does a cathode bypass capacitor reduce hum?
  214. a tube convert tries a mosfet
  215. Motorboating in leak 20
  216. New MC preamp is comming alive
  217. HV tubes
  218. power supply pspice simulation problem
  219. Can a tube rectifier handle a C dual LC?
  220. Valve schematic & PC board design
  221. Just acqired some strange tubes.........
  222. Sovtek 6L6WXT
  223. RCA tubes, need info
  224. Stromberg Carlson 245M
  225. mounting tubes upside-down
  226. 6922 acting strange........or is it ?
  227. Naive CCS quesion
  228. DIY scrap tubebuffer with ECC88
  229. choke current rating
  230. Velleman K8010
  231. Tube mic preamp for speaker measurements
  232. 833a plate resistance ?
  233. second harmonic distortion
  234. Speakers not connected on tube amp, good or bad?
  235. different psu filter topologies ?
  236. Does anyone know this english amp ?
  237. kt88 power amplifier
  238. physical layout of 6B4G PP amp?
  239. Tube Life
  240. PSUD2 designer accuracy?
  241. Need advice on old 6bq5 amp...........
  242. rca83 rectifier precautions
  243. Multi chassis grounding scheme.
  244. 717a Datasheet
  245. 12B4 Battery Bias from (Preamp: Foreplay or 5687 or 12B4 )
  246. Need Six-pac amp schematic
  247. Any clue of how to use this part as a current sink for a CF?
  248. Tweeks on tubes - bring out the demagnetiserss
  249. Absolute. Best. Chassis. Ever.
  250. Zout adapted for 2 EL34 80W Va=560V

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