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  1. 6sn7,6h30,6c33c ?
  2. signal ground and earth ground
  3. Recommended 6SN7 and 6SL7
  4. Question about BAT VK 75
  5. Please,a) cause of high pitched hum, b)DC wires twisted or not
  6. What kind of tube is this
  7. Tube Identification Help Please
  8. Balanced Load Design
  9. "lift off " or "Houston we have a problem"
  10. Anyone wound SE transformer for 6c33c-b?
  11. EL802 driving a 845 ?
  12. Diodes in series and hybrids
  13. Vacuum tube modeling software - beta testers wanted
  14. Parallel Push Pull Drivers
  15. 6V6 in triode connect mode
  16. OPT winding orientation
  17. 6.3v Heater Regulator Schematic
  18. An Important Read
  19. Did a real nice find
  20. New guy with DIY ground ?s--yes, even after searching:D
  21. 5u4g vs 5u4gb
  22. Tube amp volume fluctuation
  23. Bad tube?
  24. 1626's watt?
  25. fellow Hawkeye lookin' for cadman!
  26. Shuagang 2A3C
  27. Parallel SE vs. Single SE Output Question
  28. PP OPT Core dimension
  29. Confirmation of Primary Impedance?
  30. What does a hole on the guide pin of an octal base represent?
  31. Sepp?
  32. 6AS7 lowpower amp?
  33. Dual Mono PSU with shared earth..
  34. Breadboard 6C33C-B S.E.T
  35. audionote schematic wanted !!
  36. DIY Extreme performance Output Transformers - AMSOL
  37. Dressing up Ampex 2012 tube amps
  38. About McIntosh C22 power transformer
  39. it is almost alive
  40. Ef86, 6H30PI and 2 EL34
  41. 7868 tubes in Bogen CHB100
  42. DIY Powdered Iron Tranny Core
  43. Which BG cap best suited for cathode bypass?
  44. Oscillation question- pre or power?
  45. changing (de)coupling cap values
  46. opamp driving tubes
  47. tube 833a
  48. My latest Project (nightmare)
  49. output transformer primary imp. calculation
  50. rogers cadet mk3 hummm.....
  51. Someone help: SE shematic with GK71?
  52. Calling Graham Ingle of black cat electronics
  53. Old Emerson Tube Radio... great find!
  54. Fender princeton/champ clone
  55. E810F in triode
  56. GZ37 replacement?
  57. Bias adjustment question
  58. 6W Self Inverting 6BQ5 Amp
  59. Inductance a problem with wirewound pots?
  60. Fun circuit with a 12ax7 (ecc83)
  61. want to do PP-GM70
  62. spraying the guts of my amp...
  63. How to drop 10v from mains for 300b amp.
  64. SE Output Primary Impedence
  65. Different input valves for KT88
  66. EL84/6BQ5 LUXMAN Amps
  67. Heresy? Replacing tube rectifier w/Weber Copper Cap
  68. Direct Coupled Choke-assisted Mu-stage
  69. Another 845 SE
  70. Is it possible - 6922 Active X-over running with ~ +/- 40V ?
  71. 12FQ8's ?
  72. my first tube site
  73. different measurements
  74. DIY Dyna MK 2's and using bottlehead C4S
  75. Elektor ECL86 RIAA Preamp
  76. ECC88 - upgrading from Teonex - Help ?
  77. B+ problem?
  78. Realistic SAF 24c - Need some help
  79. what is the cap
  80. EAR 509 Mkii manual
  81. Where do you draw the line between tube and sand?
  82. Shinrock transformers
  83. OT: Anybody having problems getting to AA ? nt
  84. how much above B+ will voltage swing in OPT?
  85. bias meter and pot lead length
  86. 211 biasing voltages preferances
  87. Definitely NOT a Loftin-White!!
  88. Val MP 211 info wanted
  89. Look for EL33 PP structure circuit
  90. Rodding Bogen CHB-10A Mono Blocks
  91. two value tube amps for active DIY horns
  92. GEC 912+
  93. soon available as wrist watch.....
  94. Low sensitivity speakers and valvs, no nfb?
  95. Has anyone built this amp?
  96. Difference bewteen ultralinear & triode mode?
  97. 7586 nuvistor
  98. Valve Identification-Help
  99. KT 88 schematic search
  100. Bias the new power tube
  101. 6M6G Structure of the circuit
  102. I Think I Saw Heaven !
  103. Tron Syren
  104. extremely low output
  105. project suggestion with spare trans
  106. cinema amps
  107. c3g producing sparks
  108. Where to get transformer parts?
  109. penta labs
  110. Dynaco ST70 clone
  111. anyone tried the diy paradise simple el84 pp
  112. compression?
  113. 100V trannies as valve OPT
  114. 6bm8 / Ecl82 Pse & Srpp
  115. Lowther LL26 restoration
  116. Can I trust my Valve Tester
  117. (RCA) 6SN7 GTC spec?
  118. re: need help on Counterpoint SA5.1 preamp
  119. Why no CCS in PP output stage?
  120. 811-A amp
  121. DYNACO 120W AMP for DYNA A-451
  122. 35watts el34 amp schematic search ?
  123. tube
  124. My first design. PSE 211 to review.
  125. new 832 tubes?
  126. How to test a tube
  127. 50V line trafos for tube O/P?
  128. Distortion analysis mu follower
  129. the general radio experimenter
  130. resistor value, please
  131. PL519 PP design
  132. Dealers for output irons in EU wanted
  133. Any Twin Power triode Noval type?
  134. ARC SP9 Preamp voltages
  135. Power transformer
  136. OTL for Raven R2
  137. passive preamp (autoformer)
  138. How fragile are Sylvania 10Y tubes?
  139. SE 6SN7/813 direct coupling
  140. Riken Ohm Vs Kiwame
  141. Advantage of Valve Preamp?
  142. SiC Schottky rectifiers.
  143. 30 W from 6c33b?
  144. Built-in bleeder in ASC?
  145. 833 and GU-48
  146. Safety with high volts: 101
  147. Kofi Annan in: "B+... PLUS!!!"
  148. searching for darling tubes.
  149. Audio Research LS8 scheme
  150. My new pp KT88 design
  151. Tubepreamp and Zappulse?
  152. Comments on Transcendent Sound products
  153. regaring 833se
  154. Asc Oil Capacitors
  155. Buy Tubes
  156. Placement of power amp imput resistor
  157. Brimar EL34
  158. Elekit TU-870
  159. Tube amplifier mods
  160. Stromberg-Carlson project
  161. How to design the straight load line for choke loaded tube ?
  162. OPT failure modes
  163. Life of tubes - what to expect?
  164. Profiteering from Gordan Rankin Designs
  165. Gain/Schematic Question
  166. Heath Distortion Measurement Set HD-1
  167. Tube troubleshooting question
  168. Speaker tube amp with headphones
  169. Gain of 6AK5
  170. R vs. RC on secondaries
  171. My simple 5010 amplifiers
  172. constant current sources...
  173. Critical resistors
  174. Digital tube designs?
  175. 2A3 SE Amp
  176. Dact closeout
  177. Mysterious runaway output tube
  178. Ampex 351 Power Transformer
  179. better the Pass camp?
  180. My first tube amp kit.
  181. Plate Resistor
  182. EZ81 tube rectifier
  183. 4K:10K interstage
  184. DIY in New York City
  185. can I tone control the Peavey Classic 60/60
  186. dead project, new life?
  187. Guitar overdriven preamp schematics?
  188. Interesting Read On 300B's
  189. Low voltage tubes
  190. Perser SA20 Restoration
  191. IP headroom with LTP splitter
  192. Triode strapping 6l6gc PP
  193. Question on design
  194. Peavey Classic 60/60 bias mod advice
  195. pin outs on Hammond tube amp?
  196. cathode follower
  197. Positive feedback online issue #16
  198. el84 help
  199. RIAA help
  200. Advise for my first tube amplifier, please
  201. My 50/10Y amp with hybrid PSU... am I doing the standby switch right?
  202. What can I build with this iron?
  203. Hey Planet_10 (and others)
  204. Tube sockets for Harmon-K Citation II
  205. Seeking a source for Mundorf M-caps.
  206. Question on ZZ-1000/8228
  207. noise analysis
  208. Using latching signal relay in SE guitar amp.
  209. Help wanted with fixing french DRG valve preamp....
  210. How hot are they supposed to get?
  211. EF86 Triode Mode
  212. Using a 6SL7 in a tube overdrive pedal instead of 12AX7?
  213. Guitar Amp Question!!!!! Adding Film Cap?
  214. naive questions
  215. Rozenblits Grounded grid preamp layout
  216. Help extend the life of my 805's
  217. Difference between 5687, 5687WA and 5687WB tubes?
  218. The first tube "integrated circuit" (1926)
  219. Fix loose connection in base with solder pot?
  220. 91a 300b conversion to 2a3
  221. Adams Amp Discussion, please help! :)
  222. Had a bad accident with my TT21 today.
  223. Different sound for CD Tube Player
  224. Tube audio transformer
  225. Hybrid Srpp
  226. "it is just SO hard to get bad sound from EL84 PP amp"
  227. Wire types??
  228. triode vs. pentode for pp output.
  229. 6GK5 vs. EC95/6ER5
  230. 25BQ6GTB?? Any Good?
  231. do pp output tubes have to be matched?
  232. Ampex 600 pre
  233. line-stage preamp tubes? which ones to use...
  234. Another timekiller project
  235. 6sn7GT
  236. problem with EL84 PP amp
  237. a speaker whose load varies too much for an OTL
  238. Mystery manufacturer/distributor
  239. 37s Anyone?
  240. sv811-10 push pull
  241. 416B dangerous tube?
  242. blew my amp because of distortion pedal
  243. Help with Tube Phono Output Impedance
  244. Minimum current for choke operation
  245. stored energy in output transformer?
  246. socket mounting depth
  247. Parafeeding a push pull
  248. Different direct heating styles?
  249. The most simple tube preamp
  250. Sample/hold DC servo circuit

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