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  1. are these tubes any good ?????
  2. Free Lunch/Monkey/DRD inspired 2A3
  3. E280F Triode mode operating point
  4. EL84 Guitar amp questions (long, sorry)
  5. 2nd Aikido PCB and PSU groupbuy
  6. Newbie question...
  7. Help in getting more gain out of 300B SE
  8. ECC808 what to do
  9. Microphonics When Hot, Raytheon CK5842
  10. MOSCODE hybrid DIY
  11. transformer question
  12. help, my amp humz
  13. Le tube preamp
  14. Ideal operating point of 6sj7
  15. Anyone tried the Hammond 1642SE in a BIG SE amp?
  16. MOSFET current source as triode load
  17. C-core transformers
  18. choke and choke
  19. High Voltage Power Supply Caps
  20. suggestions for 300B tubes
  21. Differential input stage
  22. rca conversion
  23. heating
  24. Russian 6N8S/1578
  25. DIY tube amp squeals when turned up
  26. ECL80-Amp from Andreas Kirschner
  27. HSS preamp, anyone care to comment
  28. help me design an input stage for 6b4G PP
  29. Instrument/Microphone Tube Pre-amp
  30. first-time tube DIY project...phono preamp
  31. A question regarding schematics
  32. My first creation
  33. Your opinion on this VCCS heater supply please.
  34. Looking for ORIGINAL GE 6L6GC
  35. Need help - O/T trannies for future project
  36. ECL82 (6BM8) PP Stereo
  37. first DIY amp start up-yowza HELP!
  38. Ronette Info
  39. GE 5687 (5 stars)
  40. vox ac4
  41. Help: Toroid choke for a preamp
  42. Who makes a 1962 Bassman head chassis?
  43. does meter degrade sound ?
  44. Eye Tube (1629) controller help
  45. Scott 99B & 99C Public Auction Find
  46. tube id book
  47. radio , tv station and radar stations still use the best single end class a amplifier
  48. Stupid question?
  49. looking for ideas on a small tube amp stand?
  50. Cascode gain stage info?????
  51. hi gain preamp
  52. Tube flashing
  53. Bogen tube amp with variable Damping Factor
  54. Question re Allen Wright PP-1cs
  55. What is a good Tube tester to get?
  56. High Gain Preamp
  57. SACThailand
  58. You know you're a tube junky when...
  59. 6AU6 to do EF86 duty?
  60. 6Н28Б-В datasheet?
  61. Is single ended Class A better than push-pull?
  62. Is 845 better than 211 tube amplifier?
  63. Cool Fireworks (tubes are tough!)
  64. Big Big hum ???
  65. 5687 filament heater question
  66. Anyone know agood MOSFET drive for RCA 811A Tube?
  67. Who is into musical instrument tube amplification?
  68. buffer stage ECC88 or ECC83?
  69. EL34 Integrated
  70. Solid state HT regulator??
  71. Tubes driving dipole mids
  72. How do I turn an high current signal into a line level signal??
  73. Peer review, UL question
  74. Grundig TK60 - Where is the Line Out ?
  75. 12AX7, EL34 or 6L6 design wanted
  76. RCA to Speakers?
  77. Morgan Jones - Valve books
  78. Any one tried to use subminiature for input tubes?
  79. Tube data for current manufacturers?
  80. Pentode to Triode Switch
  81. fried Heatkit IP-17 power supply
  82. Suggestions for Tube Amplifier
  83. SMPS for 300B heater ?
  84. What does this mean?
  85. heater/cathode query
  86. Bottlehead S.E.X Amp
  87. Old Meets New
  88. 6336-SE modification
  89. 6as7 pre-amp questions.
  90. Help in calculating NFB loop.
  91. ECL86 - quick and dirty
  92. Help! Q? about Ohm load in '59 Bassman RI
  93. preamp tubes change
  94. Parallel PP ECL86
  95. Anyone build a Minimal Reactance PSU?
  96. Transformer hook-up question to 115V AC line
  97. Langevin Schematic Archive
  98. PPP EL84 Amp
  99. Interesting comparison between NOS RCA 12ax7, Chinese 12ax7a
  100. Aikido: Width control
  101. Shielded Input Wire
  102. choke
  103. Multiple Inputs in One Shielded Cable?
  104. Presence control on a SE ?
  105. Question : pentode ccs schematic ?
  106. right capacitor value?
  107. Anybody knows this tube--WE 430C
  108. Transformer substitution help
  109. CFB Issues
  110. Please Suggest: Old Tube Usages
  111. Very powerful push/pull circuit
  112. Project choice for KT88
  113. Tamura F-475 in Parafeed?
  114. Kofi Annan in: "Push and Pull with Me"
  115. Schmitt dephaser
  116. Anyone using Chelmer Valves?
  117. SET w/ 300B Ultrapath + Parafeed Typologies
  118. a question about local feedback
  119. about input transformer
  120. Power transformer selection madness
  121. EF91 Line Stage questions
  122. Sourcing parts for Dynaco PAS rebuild
  123. HH Scott 223 monoblock schematics
  124. info needed on the 7c6 tube
  125. A final question on grounding(yeah right!)
  126. Schematics and Manuals Site Found
  127. Sprague/Cap Color Codes ?
  128. saba console radio working?
  129. Feedback and mu-followers
  130. Hundreds of 6AL5s
  131. Orange/Red Spot on The Anode of Sovtek 6L6GC
  132. Best way to isolate non-isolated RCAs?
  133. Power Resistor Smoking on HF-81
  134. Audio Innovations L-2
  135. first tube project
  136. And now a question about power switch...
  137. 2E24 ultralinear
  138. tube pin numbers
  139. Will This possibly work?
  140. What is the right current for a 300B at 400V and -80V grid bias?
  141. Simple Cap-Coupled CF Advise Needed
  142. tube amp layout reality check
  143. plitron
  144. How long does a 7199 last?
  145. Modding Tube Mixer Into DAW Front End
  146. CAE Cascode Diffamp Front End
  147. recommended resistor wattage
  148. 6.3V Rectifier Tube Lit by 5V
  149. Precision Electronics Amp w/ 6GT5's, Convert to 6L6's?
  150. WE121A, Please critique me
  151. Grommes / Western Electric G5M Tube Mixer Mods
  152. schemes needed
  153. PP to PPP
  154. aikido voltage swing
  155. voltage drop across a CCS...
  156. bogen db20 Schematic
  157. Mullards branded as Telefunkens???
  158. Pentodes; plate resistance; damping...
  159. PP amp has become SE?
  160. anyone mod a NYAL Moscode superIt?
  161. update to phillips sepp otl?
  162. DC filament supply LC or CL
  163. No Bass Control
  164. Unison Research Simply2 or s2schematics
  165. Border Patrol Power Supply
  166. Any leads on repairing a vintage Alamo Capri tube amp? >>
  167. nanocrystalline amorphous OPT
  168. El84 Pp
  169. Preamp, Euridice?
  170. Has anyone built a PS like this?
  171. Tube sockets in Eagle?
  172. E235L tubes
  173. Grid Input Transformers
  174. Aikido Power Supply
  175. ralph power pp amp with 807 ?
  176. fender clone, 6SJ7 vs. 6SN7
  177. tube stores in moscow
  178. 211 and 845
  179. Need help with amp
  180. Altec 1570B
  181. UL to triode
  182. How can I improve this tube amp (see pics)?
  183. klimo merlin preamp sch wanted
  184. CCS question
  185. *****es brew step 2 ... or grid bias ... how to?
  186. Filaments for the Aikido
  187. RE: RC-19 or RC-30
  188. My experience building a DRD d3A/300B amp
  189. TIP50 + LM317 High Voltage Regulator
  190. Any info on old "Cosmos" amp'?
  191. What more do I need to know?
  192. EBAY Find Of The Year Club LOL
  193. Partial feedback DHP SE amp
  194. newbie question
  195. Tube 1616
  196. Class A tube integrated circuit request
  197. Global Feedback Source Point
  198. These look interesting for that SE project
  199. Phillips AG9008 amp - looking for diagram
  200. 3cx3000
  201. EL86 and speakers? 800 Ohm
  202. Looking for CAT SL-1 Schematic
  203. el84 - 807 ?
  204. Low-voltage Tubebuffer by David Lin
  205. changing diodes with 5AR4 tubes
  206. 801 amp PS
  207. what can I do with these tubes?
  208. How to 'fine tune' your amps?
  209. Otl
  210. Rogers E40a schematic?
  211. Peavey Triple X Rewire! Help!
  212. Butler Monad A 100
  213. Using the UTC LS-33 as a Push-Pull output for 2A3's
  214. 2A3 AC filament hum
  215. A question about diodes...
  216. 5R4WGY/A/B , input filter capacitors
  217. attenuator hook up?
  218. best material for mounting tubes sideways
  219. Amp suggestions needed
  220. CC vs EI I mean toroids are out of question
  221. Newbie need help in designing tube preamp for my 3886 GC??Please Help me!!
  222. Inviting Comment on Schematic
  223. SE 2A3 input stage
  224. DIY Tube Amp Questions
  225. Need tube buffer circuit for sub-woofer out
  226. How to connect electrostatic shield of power transformer?
  227. Your favourite filament supply for DHT's?
  228. Quantum Impex
  229. Channel Switching Real McTube?
  230. so who owns a dac5 or m8 phono
  231. OPT at frequency extremes
  232. Parafeed with resistive load
  233. EL34 SE triode mode A class sch wanted
  234. Dumont (where theres smoke theres sound)
  235. HYBRID- Schematic
  236. I have a pair of JBL control 5 speakers, which valve amp design you recommend?
  237. sovtek 300B
  238. 12au6 preamp
  239. Engineering Drawings PCB Mount Tube Sockets
  240. Help with a choke for first-time DIY...
  241. Power SRPP
  242. Anode Loading Vs. Cathode Loading ?
  243. Purist 2 Line Amp
  244. Yet Another "EURIDICE" Pre Amp, 4CH This Time
  245. radio receiver
  246. Help Vintage Guitar Hummer
  247. Pioneer SM83 and 500k pot
  248. How many ways to connect a pentode...
  249. How do I go about repairing a vintage Pilotone AA-410A monoblock tube amp?
  250. Any pitfalls to tapping voltage doubler?

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