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  1. preamp gain and output transformer question
  2. Would an s5 K-12M kit suffice?
  3. 6c45 and passive volume control?
  4. Something of Interest to Newbies
  5. Chinese Tube Amp & DIY .. Pro & Con
  6. Franks Ultimate Preamp....
  7. Interstage Transformer Nomenclature
  8. PP or SE for Horns?
  9. Output transformer in SIMetrix?
  10. seampcad
  11. Looking for an amp project
  12. Unison Research Smart 845 schematics
  13. HELP - From the audiophile Heads - Amp Advice
  14. 8233, 8116 & 6BZ6 valves - what are they good for?
  15. wires of output transformer are too thin!
  16. Reichert Feral Eye
  17. BIG LOUD SCREECH on LEFT channel only
  18. humming from volume
  19. Paia TubeHead and Symmetry Trims
  20. Output trafo for WE-91 L'Audiophile amp?
  21. Transformer voltage too high for 300B amp
  22. More shopping help please - GE Combo 330
  23. Bias filtering
  24. PP pentode screen supply
  25. 6v6 and OPT with 10-12k ohm(primary impedence)
  26. Identity Help - Is it worth working on
  27. Need info about 5G84 tube
  28. RF Noise in Power Supply
  29. My audionote Kit one have problem on 300B cathode terminal
  30. Partial Feedback Amplifiers
  31. filament transformer vs plate transformer
  32. Any subs for 6N1 & 6N2 twin triode valves?
  33. PSU questions
  34. Any designs for 6EJ7 out there?
  35. SRPP headphoneamp with E88CC
  36. newbie to DIY
  37. Just bought a leak stereo 20 (pics!)
  38. Mysterious Output Transformer....
  39. Hum free 5687 AC filament supply, is it possable ?
  40. Will This Preamp Work
  41. help with input pot on el84 PP amp
  42. NOS Philmore Output Transformern or Modern
  43. tube amp
  44. power supply, Help please!!!
  45. Tubes and magnetic fields
  46. Driver tube for 45 interstage 1:1
  47. 89 db is it enough ?
  48. Troubl-shooting heater voltage for filament
  49. arcing in rectifier tube
  50. 1/8" Aluminum for top plate?
  51. Shopping list
  52. 6sn7 valves
  53. Neon flashes with the music
  54. Help in SE 807 amp
  55. naim user defects to valves !
  56. tamura opt need help
  57. Line stage question
  58. Tube question, how to read the difference.
  59. What Tube amp for Biginner?
  60. Leak Stereo 20 rebuild/restore question
  61. Is there any advantage in using preamp tubes in output stages ??
  62. 12b4 as PP output tubes
  63. Valves stripped bare….
  64. Anybody know this TUBE?
  65. Noob Q: are the efficiency figures for valve amps the same as with transistors?
  66. Need help understanding something about UL stages
  67. I'd like to make a simple 50 amplifier
  68. gates tube pre-amp info??
  69. OT - To those who correspond with me....
  70. Could use info on Grommes + knight.
  71. Single Ended Ultra linear, anyone built one?
  72. Audio Innovations 800 Anniversary problem
  73. Transformer coupled 6SN7 push-pull DAC output stage?
  74. Vkh max voltage
  75. Mosfet differences with valves
  76. Need schematic - Audio Research LS2B MKII
  77. EL84M specs.
  78. What to do with these?
  79. Dyna Mk IV Driver Boards
  80. OTL driving series arrays
  81. Voltage problem
  82. Amp intermittently blowing fuse at power up
  83. Worlds Best Preamp
  84. Heathkit TT-1A Calibration
  85. surplus 12ax7a
  86. Phase Splitter as input stage
  87. DHT DC heater question
  88. Wanted-Assembly manual for Scott LK-150
  89. Happy new year, sophielove.
  90. Need UTC PVM-3 primary ?
  91. power amp for small studio
  92. Preamp
  93. Problems with EICO HF-12 amp.
  94. Technics SU-30A's schema???
  95. Tube PWM driver
  96. Tungsram tube data
  97. S-5 Electronics K-12M (11MS8) 8 wpc PP Tube Amp Kit ($139)
  98. sharp cutoff pentode
  99. JJ E34L failure(s)
  100. Valve effects loop
  101. Bruce Moore "Companion" - Schematic
  102. CT impedence mismatch?
  103. Tube multiplex adapter parts replacement
  104. SY gets jiggy (5692 measurements)
  105. Tube Drag Racing!
  106. OTL, quick `n dirty
  107. 6V6 stereo amp
  108. humming from amplifier
  109. Any tube audiophile in New Dephli, India
  110. What are terminal 1 & 4 of 300B tube
  111. Tube Nube - need advice on Scott LK150
  112. Pentode AB1 or AB2?
  113. #56 tube line stage
  114. **** another unusual hum problem !!
  115. Any comments on Eico HF-14 and HF-85
  116. sensitivities of amplifier configurations
  117. Building a Sun Audio sv 300b Mk II clone
  118. wanted information! vellman vaa-70 tube amp
  119. old tubes, what to do?
  120. Knowledge needed. Need answer to basic yet puzzling question.
  121. tubes 5965A and 5814A
  122. 6s4a as driver for 6as7 in SEAmp
  123. Tube Manufactures Cross references
  124. KT88 vs. KT90 bench test
  125. Variable Voltage Technology(uk) iron
  126. Tutorial: building techniques
  127. Anyone tried UL or Triode connecting the $140 kit ?
  128. Using microphone transformers as phase splitters .
  129. Tube Cooling Recommendations
  130. WE 300B Vs &&&&
  131. Line stage board off from overseas. problems
  132. Volume control for tube amplifier ??
  133. Mro Pt8
  134. looking for se 811 schematics
  135. 6ar5??
  136. bias meter
  137. 829B/3E29 datasheet triodemode
  138. A better triode strap?
  139. outputtransformer data needed
  140. info wanted about a output transformer
  141. WE316a/VT191 triode
  142. Bogen DS-225
  143. PPP KT66, Jensen P15N, Hammond PowTran 378CX/193L Choke
  144. 6V6GT and 6L6GT
  145. Unknown vaccumtubes
  146. Milleroux OPT
  147. Tube equalents.
  148. Western Electric 300B
  149. AVVT Tubes
  150. PAS phono. (curcio)
  151. Suitable Transformer for Etude 12B4A
  152. SE tube in mono amp
  153. Pentode current sink - how to connect the control grid?
  154. where are audio equipments in Beijing?
  155. Mullard 3-3 Question
  156. Grounded Grid w/ remote volume
  157. Modifying (Reducing) Screen Voltage
  158. Single Stage Inverting or no?
  159. bias arrangements for P-P amps.
  160. Beginner's heaphone amp?
  161. Bridging
  162. Valve circuit in I, Robot
  163. ECC33, 34, 35 tubes?
  164. Help!! any good EL3n Push Pull circuits????
  165. What PP circuit to use for 6SN7 and 2a3?
  166. Stage classification and efficiency
  167. 2x8w SET choice.
  168. 10-15 mu DHT?
  169. Possible computer speaker amp
  170. Help me make a preamp decision
  171. Plitron PAT4006 - advice please
  172. Big valve
  173. Need help with PP pentode design
  174. EQ-circuits.
  175. measuring the power choke inductance confusion
  176. Single-end... which tube?
  177. bias voltage for 6BQ5 plate
  178. small poweramp with 12AH7 and 6AU6WA...
  179. Layout Check
  180. auto component placer with tube PCB prints
  181. Hammond 300BX for a Dynaco modified Mullard 5-20 circuit
  182. Audio Electronics Supply AE-1 problems
  183. Cunningham CX 301A
  184. Quicksilver zener diode mod
  185. ELC7? I need help to identify this valve
  186. Spice 3f4 "Koren" models
  187. parallel or push-pull
  188. Isolation
  189. Telefunken 6SN7; Are They Imported Or Genuine TFK MFD?
  190. Magic Gu15
  191. Help identifing RCA transformer
  192. Problem with tube overheating. PLEASE HELP
  193. Battery powered phono.
  194. Ancient Valve Amp and Rola Speaker PLEASE HELP!
  195. Has anyone used a triode as a shunt regulator?
  196. EL84 SE design recommendations?
  197. need a good low parts phono tube preamp schematic....
  198. Shunt Feedback - effect on input impedance
  199. searching bogen db10a schematic
  200. Swinging choke?
  201. Schematic help. (thread split)
  202. Playing with a Magic Eye.
  203. A music coming from component.
  204. DIY meeting in Belgium ?
  205. EL34 Push Pull weirdness
  206. Balancing DC-coupled differential stages
  207. Jadis JPS 2 schematic
  208. Leak Stereo20 rebuild ?
  209. Vintage amp rebuild advice
  210. simple 6v6 push-pull schematic ?
  211. valve newbie; 6H1H pre-amp.
  212. Polyprops as cathode bypass
  213. Eventual 300B advice welcome!
  214. Thinking about getting into Tubes, any kit recommendations?
  215. Another Mullard 5-20.
  216. Subbing EL86 (6CW5) for EL84
  217. Valve Warmer/Distortion PCB
  218. Having a problem with building this 6C45 PP amp.
  219. Blue glow in tube. Is the tube dead or not?
  220. Repairing VTL TL2.5
  221. Another ECL86 (integrated this time)
  222. CJ MV55 triode mode
  223. Mullard 20W Amp
  224. Pro Model Tubes,for example Avalon
  225. How to find out which is which????
  226. Matching a preamp to high output impedance source
  227. VSE PP1 driver stage
  228. Thordarson Choke type 1-8C42
  229. Ediswan ECL86 datasheet wanted.
  230. Minimal approach with hybrid rectification: Is this possible?
  231. SS vs. Tube Rectification (and chokes)?
  232. Help wanted on SRPP preamp
  233. New Pas Question no photos
  234. amp-schematic questions...
  235. 5902 subminiature audio pentode
  236. TPP versus PSE.
  237. my fun....
  238. Schematic for Siemens F2a tube amp
  239. Snubber
  240. Which preamp ?
  241. Distortion+low volume..
  242. JJ Tesla
  243. Dynaco Pas
  244. feedback resistor
  245. Grid stoppers?
  246. Transcendent T8 with 12 output tubes
  247. Can anyone recommend a good buffer circuit
  248. happy with my MC-25
  249. A building block approach to valve amp design
  250. math quiz- input z triode amp

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