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  1. power supply issues
  2. Which Amperex ECC88 is the best?
  3. laney PA amp questions
  4. Grid battery bias on phono....
  5. EL34 identification
  6. UL vs SE
  7. 6sn7 operating points
  8. HELP! B+ voltage problem/burning power resistor
  9. are these tubes any good ?????
  10. Free Lunch/Monkey/DRD inspired 2A3
  11. E280F Triode mode operating point
  12. EL84 Guitar amp questions (long, sorry)
  13. 2nd Aikido PCB and PSU groupbuy
  14. Newbie question...
  15. Help in getting more gain out of 300B SE
  16. ECC808 what to do
  17. Microphonics When Hot, Raytheon CK5842
  18. MOSCODE hybrid DIY
  19. transformer question
  20. help, my amp humz
  21. Le tube preamp
  22. Ideal operating point of 6sj7
  23. Convert a non-valve amp to a Valve (tube) Amp
  24. Anyone tried the Hammond 1642SE in a BIG SE amp?
  25. MOSFET current source as triode load
  26. C-core transformers
  27. choke and choke
  28. High Voltage Power Supply Caps
  29. suggestions for 300B tubes
  30. Differential input stage
  31. rca conversion
  32. heating
  33. Russian 6N8S/1578
  34. DIY tube amp squeals when turned up
  35. ECL80-Amp from Andreas Kirschner
  36. HSS preamp, anyone care to comment
  37. help me design an input stage for 6b4G PP
  38. Instrument/Microphone Tube Pre-amp
  39. first-time tube DIY project...phono preamp
  40. A question regarding schematics
  41. My first creation
  42. Your opinion on this VCCS heater supply please.
  43. Looking for ORIGINAL GE 6L6GC
  44. Need help - O/T trannies for future project
  45. ECL82 (6BM8) PP Stereo
  46. first DIY amp start up-yowza HELP!
  47. Ronette Info
  48. GE 5687 (5 stars)
  49. vox ac4
  50. Help: Toroid choke for a preamp
  51. Who makes a 1962 Bassman head chassis?
  52. does meter degrade sound ?
  53. Eye Tube (1629) controller help
  54. Scott 99B & 99C Public Auction Find
  55. tube id book
  56. radio , tv station and radar stations still use the best single end class a amplifier
  57. Stupid question?
  58. looking for ideas on a small tube amp stand?
  59. Cascode gain stage info?????
  60. hi gain preamp
  61. Tube flashing
  62. Bogen tube amp with variable Damping Factor
  63. Question re Allen Wright PP-1cs
  64. What is a good Tube tester to get?
  65. High Gain Preamp
  66. SACThailand
  67. You know you're a tube junky when...
  68. 6AU6 to do EF86 duty?
  69. 6Н28Б-В datasheet?
  70. Is single ended Class A better than push-pull?
  71. Is 845 better than 211 tube amplifier?
  72. Cool Fireworks (tubes are tough!)
  73. Big Big hum ???
  74. 5687 filament heater question
  75. Anyone know agood MOSFET drive for RCA 811A Tube?
  76. Who is into musical instrument tube amplification?
  77. buffer stage ECC88 or ECC83?
  78. EL34 Integrated
  79. Solid state HT regulator??
  80. Tubes driving dipole mids
  81. How do I turn an high current signal into a line level signal??
  82. Peer review, UL question
  83. Grundig TK60 - Where is the Line Out ?
  84. 12AX7, EL34 or 6L6 design wanted
  85. RCA to Speakers?
  86. Morgan Jones - Valve books
  87. Any one tried to use subminiature for input tubes?
  88. Tube data for current manufacturers?
  89. Pentode to Triode Switch
  90. fried Heatkit IP-17 power supply
  91. Suggestions for Tube Amplifier
  92. SMPS for 300B heater ?
  93. What does this mean?
  94. heater/cathode query
  95. Bottlehead S.E.X Amp
  96. Old Meets New
  97. 6336-SE modification
  98. 6as7 pre-amp questions.
  99. Help in calculating NFB loop.
  100. ECL86 - quick and dirty
  101. Help! Q? about Ohm load in '59 Bassman RI
  102. preamp tubes change
  103. Parallel PP ECL86
  104. Anyone build a Minimal Reactance PSU?
  105. Transformer hook-up question to 115V AC line
  106. Langevin Schematic Archive
  107. PPP EL84 Amp
  108. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  109. Aikido: Width control
  110. Shielded Input Wire
  111. choke
  112. Multiple Inputs in One Shielded Cable?
  113. Presence control on a SE ?
  114. Question : pentode ccs schematic ?
  115. right capacitor value?
  116. Anybody knows this tube--WE 430C
  117. Transformer substitution help
  118. CFB Issues
  119. Please Suggest: Old Tube Usages
  120. Very powerful push/pull circuit
  121. Project choice for KT88
  122. Tamura F-475 in Parafeed?
  123. Kofi Annan in: "Push and Pull with Me"
  124. Schmitt dephaser
  125. Anyone using Chelmer Valves?
  126. SET w/ 300B Ultrapath + Parafeed Typologies
  127. a question about local feedback
  128. about input transformer
  129. Power transformer selection madness
  130. EF91 Line Stage questions
  131. Sourcing parts for Dynaco PAS rebuild
  132. HH Scott 223 monoblock schematics
  133. info needed on the 7c6 tube
  134. A final question on grounding(yeah right!)
  135. Schematics and Manuals Site Found
  136. Sprague/Cap Color Codes ?
  137. saba console radio working?
  138. Feedback and mu-followers
  139. Hundreds of 6AL5s
  140. Orange/Red Spot on The Anode of Sovtek 6L6GC
  141. Best way to isolate non-isolated RCAs?
  142. Power Resistor Smoking on HF-81
  143. Audio Innovations L-2
  144. first tube project
  145. And now a question about power switch...
  146. 2E24 ultralinear
  147. tube pin numbers
  148. Will This possibly work?
  149. What is the right current for a 300B at 400V and -80V grid bias?
  150. Simple Cap-Coupled CF Advise Needed
  151. tube amp layout reality check
  152. plitron
  153. How long does a 7199 last?
  154. Modding Tube Mixer Into DAW Front End
  155. CAE Cascode Diffamp Front End
  156. recommended resistor wattage
  157. 6.3V Rectifier Tube Lit by 5V
  158. Precision Electronics Amp w/ 6GT5's, Convert to 6L6's?
  159. WE121A, Please critique me
  160. Grommes / Western Electric G5M Tube Mixer Mods
  161. schemes needed
  162. PP to PPP
  163. aikido voltage swing
  164. voltage drop across a CCS...
  165. bogen db20 Schematic
  166. Mullards branded as Telefunkens???
  167. Pentodes; plate resistance; damping...
  168. PP amp has become SE?
  169. anyone mod a NYAL Moscode superIt?
  170. update to phillips sepp otl?
  171. DC filament supply LC or CL
  172. No Bass Control
  173. Unison Research Simply2 or s2schematics
  174. Border Patrol Power Supply
  175. Any leads on repairing a vintage Alamo Capri tube amp? >>
  176. nanocrystalline amorphous OPT
  177. El84 Pp
  178. Preamp, Euridice?
  179. Has anyone built a PS like this?
  180. Tube sockets in Eagle?
  181. E235L tubes
  182. Grid Input Transformers
  183. Aikido Power Supply
  184. ralph power pp amp with 807 ?
  185. fender clone, 6SJ7 vs. 6SN7
  186. tube stores in moscow
  187. 211 and 845
  188. Need help with amp
  189. Altec 1570B
  190. UL to triode
  191. How can I improve this tube amp (see pics)?
  192. klimo merlin preamp sch wanted
  193. CCS question
  194. *****es brew step 2 ... or grid bias ... how to?
  195. Filaments for the Aikido
  196. RE: RC-19 or RC-30
  197. My experience building a DRD d3A/300B amp
  198. TIP50 + LM317 High Voltage Regulator
  199. Any info on old "Cosmos" amp'?
  200. What more do I need to know?
  201. EBAY Find Of The Year Club LOL
  202. Partial feedback DHP SE amp
  203. newbie question
  204. Tube 1616
  205. Class A tube integrated circuit request
  206. Global Feedback Source Point
  207. These look interesting for that SE project
  208. Phillips AG9008 amp - looking for diagram
  209. 3cx3000
  210. EL86 and speakers? 800 Ohm
  211. Looking for CAT SL-1 Schematic
  212. el84 - 807 ?
  213. Low-voltage Tubebuffer by David Lin
  214. changing diodes with 5AR4 tubes
  215. 801 amp PS
  216. what can I do with these tubes?
  217. How to 'fine tune' your amps?
  218. Otl
  219. Rogers E40a schematic?
  220. Peavey Triple X Rewire! Help!
  221. Butler Monad A 100
  222. Using the UTC LS-33 as a Push-Pull output for 2A3's
  223. 2A3 AC filament hum
  224. A question about diodes...
  225. 5R4WGY/A/B , input filter capacitors
  226. attenuator hook up?
  227. best material for mounting tubes sideways
  228. Amp suggestions needed
  229. CC vs EI I mean toroids are out of question
  230. Newbie need help in designing tube preamp for my 3886 GC??Please Help me!!
  231. Inviting Comment on Schematic
  232. SE 2A3 input stage
  233. DIY Tube Amp Questions
  234. Need tube buffer circuit for sub-woofer out
  235. How to connect electrostatic shield of power transformer?
  236. Your favourite filament supply for DHT's?
  237. Quantum Impex
  238. Channel Switching Real McTube?
  239. so who owns a dac5 or m8 phono
  240. OPT at frequency extremes
  241. Parafeed with resistive load
  242. EL34 SE triode mode A class sch wanted
  243. Dumont (where theres smoke theres sound)
  244. HYBRID- Schematic
  245. I have a pair of JBL control 5 speakers, which valve amp design you recommend?
  246. sovtek 300B
  247. 12au6 preamp
  248. Engineering Drawings PCB Mount Tube Sockets
  249. Help with a choke for first-time DIY...
  250. Power SRPP

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