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  1. EL84/6BQ5 LUXMAN Amps
  2. Heresy? Replacing tube rectifier w/Weber Copper Cap
  3. Direct Coupled Choke-assisted Mu-stage
  4. Another 845 SE
  5. Is it possible - 6922 Active X-over running with ~ +/- 40V ?
  6. 12FQ8's ?
  7. my first tube site
  8. different measurements
  9. DIY Dyna MK 2's and using bottlehead C4S
  10. Elektor ECL86 RIAA Preamp
  11. ECC88 - upgrading from Teonex - Help ?
  12. B+ problem?
  13. Realistic SAF 24c - Need some help
  14. what is the cap
  15. EAR 509 Mkii manual
  16. Where do you draw the line between tube and sand?
  17. Shinrock transformers
  18. OT: Anybody having problems getting to AA ? nt
  19. how much above B+ will voltage swing in OPT?
  20. bias meter and pot lead length
  21. 211 biasing voltages preferances
  22. Definitely NOT a Loftin-White!!
  23. Val MP 211 info wanted
  24. Look for EL33 PP structure circuit
  25. Rodding Bogen CHB-10A Mono Blocks
  26. two value tube amps for active DIY horns
  27. GEC 912+
  28. soon available as wrist watch.....
  29. Low sensitivity speakers and valvs, no nfb?
  30. Has anyone built this amp?
  31. Difference bewteen ultralinear & triode mode?
  32. 7586 nuvistor
  33. Valve Identification-Help
  34. KT 88 schematic search
  35. Bias the new power tube
  36. 6M6G Structure of the circuit
  37. I Think I Saw Heaven !
  38. Tron Syren
  39. extremely low output
  40. project suggestion with spare trans
  41. cinema amps
  42. c3g producing sparks
  43. Where to get transformer parts?
  44. penta labs
  45. Dynaco ST70 clone
  46. anyone tried the diy paradise simple el84 pp
  47. compression?
  48. 100V trannies as valve OPT
  49. 6bm8 / Ecl82 Pse & Srpp
  50. Lowther LL26 restoration
  51. Can I trust my Valve Tester
  52. (RCA) 6SN7 GTC spec?
  53. re: need help on Counterpoint SA5.1 preamp
  54. Why no CCS in PP output stage?
  55. 811-A amp
  56. DYNACO 120W AMP for DYNA A-451
  57. 35watts el34 amp schematic search ?
  58. tube
  59. My first design. PSE 211 to review.
  60. new 832 tubes?
  61. How to test a tube
  62. 50V line trafos for tube O/P?
  63. Distortion analysis mu follower
  64. the general radio experimenter
  65. resistor value, please
  66. PL519 PP design
  67. Dealers for output irons in EU wanted
  68. Any Twin Power triode Noval type?
  69. ARC SP9 Preamp voltages
  70. Power transformer
  71. OTL for Raven R2
  72. passive preamp (autoformer)
  73. How fragile are Sylvania 10Y tubes?
  74. SE 6SN7/813 direct coupling
  75. Riken Ohm Vs Kiwame
  76. Advantage of Valve Preamp?
  77. SiC Schottky rectifiers.
  78. 30 W from 6c33b?
  79. Built-in bleeder in ASC?
  80. 833 and GU-48
  81. Safety with high volts: 101
  82. Kofi Annan in: "B+... PLUS!!!"
  83. searching for darling tubes.
  84. Audio Research LS8 scheme
  85. My new pp KT88 design
  86. Tubepreamp and Zappulse?
  87. Comments on Transcendent Sound products
  88. regaring 833se
  89. Asc Oil Capacitors
  90. Buy Tubes
  91. Placement of power amp imput resistor
  92. Brimar EL34
  93. Elekit TU-870
  94. Tube amplifier mods
  95. Stromberg-Carlson project
  96. How to design the straight load line for choke loaded tube ?
  97. OPT failure modes
  98. Life of tubes - what to expect?
  99. Profiteering from Gordan Rankin Designs
  100. Gain/Schematic Question
  101. Heath Distortion Measurement Set HD-1
  102. Tube troubleshooting question
  103. Speaker tube amp with headphones
  104. Gain of 6AK5
  105. R vs. RC on secondaries
  106. My simple 5010 amplifiers
  107. constant current sources...
  108. Critical resistors
  109. Digital tube designs?
  110. 2A3 SE Amp
  111. Dact closeout
  112. Mysterious runaway output tube
  113. Ampex 351 Power Transformer
  114. better the Pass camp?
  115. My first tube amp kit.
  116. Plate Resistor
  117. EZ81 tube rectifier
  118. 4K:10K interstage
  119. DIY in New York City
  120. can I tone control the Peavey Classic 60/60
  121. dead project, new life?
  122. Guitar overdriven preamp schematics?
  123. Interesting Read On 300B's
  124. Low voltage tubes
  125. Perser SA20 Restoration
  126. IP headroom with LTP splitter
  127. Triode strapping 6l6gc PP
  128. Question on design
  129. Peavey Classic 60/60 bias mod advice
  130. pin outs on Hammond tube amp?
  131. cathode follower
  132. Positive feedback online issue #16
  133. el84 help
  134. RIAA help
  135. Advise for my first tube amplifier, please
  136. My 50/10Y amp with hybrid PSU... am I doing the standby switch right?
  137. What can I build with this iron?
  138. Hey Planet_10 (and others)
  139. Tube sockets for Harmon-K Citation II
  140. Seeking a source for Mundorf M-caps.
  141. Question on ZZ-1000/8228
  142. noise analysis
  143. Using latching signal relay in SE guitar amp.
  144. Help wanted with fixing french DRG valve preamp....
  145. How hot are they supposed to get?
  146. EF86 Triode Mode
  147. Using a 6SL7 in a tube overdrive pedal instead of 12AX7?
  148. Guitar Amp Question!!!!! Adding Film Cap?
  149. naive questions
  150. Rozenblits Grounded grid preamp layout
  151. Help extend the life of my 805's
  152. Difference between 5687, 5687WA and 5687WB tubes?
  153. The first tube "integrated circuit" (1926)
  154. Fix loose connection in base with solder pot?
  155. 91a 300b conversion to 2a3
  156. Adams Amp Discussion, please help! :)
  157. Had a bad accident with my TT21 today.
  158. Different sound for CD Tube Player
  159. Tube audio transformer
  160. Hybrid Srpp
  161. "it is just SO hard to get bad sound from EL84 PP amp"
  162. Wire types??
  163. triode vs. pentode for pp output.
  164. 6GK5 vs. EC95/6ER5
  165. 25BQ6GTB?? Any Good?
  166. do pp output tubes have to be matched?
  167. Ampex 600 pre
  168. line-stage preamp tubes? which ones to use...
  169. Another timekiller project
  170. 6sn7GT
  171. problem with EL84 PP amp
  172. a speaker whose load varies too much for an OTL
  173. Mystery manufacturer/distributor
  174. 37s Anyone?
  175. sv811-10 push pull
  176. 416B dangerous tube?
  177. blew my amp because of distortion pedal
  178. Help with Tube Phono Output Impedance
  179. Minimum current for choke operation
  180. stored energy in output transformer?
  181. socket mounting depth
  182. Parafeeding a push pull
  183. Different direct heating styles?
  184. The most simple tube preamp
  185. Sample/hold DC servo circuit
  186. Interstage transformer as OPT?
  187. What can you do with cheap 1kV power?
  188. Marshall Super Lead MkII
  189. Flashing Rectifier Tube- Bad Thing?
  190. Amp for my speakers, PLEASE Help
  191. suitable preamp for a tube amp (kt88+12ax7)
  192. anyone know of a kit to make tube night light?
  193. Sprague capasitor id
  194. Question on Tango XE-20S
  195. 6SL7 diff pair - how to set up????
  196. Hwat should be the best driver for a 520V2 ?
  197. problem: half power on push-pull ?
  198. Screen voltage - standby cut (Roland Bolt 60)
  199. Triode Dick/FdeGrove 2A3 PP amplifier
  200. PSU for perusal
  201. Kt66 Gec Replica
  202. 6as7
  203. Please confirm my transformer math.
  204. Anything wrong with this design?
  205. Buffer Line Pre-Amp Power Tx
  206. Why filter in tube DAC?
  207. advances in tube amp design?
  208. How to determine grid leak current?
  209. dissimilar triode for White cathode follower?
  210. tube rectifier
  211. 6Vdc from 6,3Vac
  212. Computer Grade Cap or Inverter Grade Cap???
  213. Peculiar Sovtek EL34 bevaviour
  214. 5AS4 sub for 5U4
  215. Preamp hum again
  216. Modifying amp to accept different tubes (Newbie alert!)
  217. Quetion for Thorsten
  218. OPT axis
  219. Schematic Counterpoint SA3.1 and SA-9
  220. optimizing constant current heater supply
  221. Valve Art KT100
  222. baxandall tone control
  223. Kofi Annan in: "Brownin' Out!"
  224. strange tube
  225. Monarch SA-30 Schematic
  226. Power Supply for 300B Monoblock
  227. Matisse Line Amp
  228. Panel mounting on a woode case
  229. Hardware??
  230. another way to turn a pentode or tetrode into a triode
  231. 0Z4 as a rectifier?
  232. Unused HV windings on power transformer
  233. Mundorf M-Lytic and Silver-in-Oil Capacitors
  234. grainy preamp gain
  235. Need help with PS for 1626 "Darling" amp
  236. questions about power supply for 6l6 pp
  237. Proof that demagnetizing tubes works
  238. ECC88/5687/2A3 amp voltages
  239. What can I do with these? (tube and OPT question)
  240. Blowing fuses
  241. questions about transfo
  242. Common Cathode Resistor
  243. Why a Zobel network across OPT primary or secondary?
  244. Morgan Jones "Valve Amplifiers"
  245. Why?
  246. 833 push pull design help
  247. Lamm schematics
  248. Mu Followers -- ressources?
  249. Pennsylvania DIY's
  250. Interstage trans? Yes please!

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