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  1. How to test a 6H30 tube
  2. Karaoke Tube Hi-end In The Future
  3. What makes the old McIntosh stuff so good?
  4. Paralell 10M45's for 71A DHT filament?
  5. Rod Coleman CCS/gyrator help
  6. Differential amp.Do they pass 2nd harmonics or reject them?
  7. A half 6sl7 tube
  8. failing tube
  9. Capacitor in series - Resistor across ?
  10. Tube preamp choise...
  11. Some general tube questions from a Tube newbie !!
  12. How unsafe is an Autotransformer?
  13. Can a dual triode use a common cathode resistor?
  14. Dared MC-7P
  15. SRC2496 Miniatube tube output stage
  16. Tubetech smc2b multiband compressor
  17. Tweaking/correction question - Xindak MT-1 balance
  18. Em87/ em84
  19. Pioneer SM-83 restoration
  20. Best GM70 version suited for audio??
  21. PSUDII transformer question
  22. what are these caps doing?
  23. Distortion VS OPT impedence
  24. Heater wiring approaches
  25. Rogers pops, crackle and static are driving me mad!
  26. tube power enough?
  27. Ever notice those scratches on some plates??
  28. JE 45/2A3 SE 2001 edition
  29. Mini tube output stage
  30. Mismatched Power Tubes
  31. Eimac 35TG amplifier glows !
  32. ECC88 Shield
  33. One amp channel for mid, the other for tweeter, to SE or to PP, THAT is the Question?
  34. SRRP Output stage. Calculating power output.
  35. bogen chb-35
  36. Rating for resistors in power supply?
  37. Effects of Bias /Ammeters....
  38. pentode mode distortion 6LR8? George?
  39. Info for 6b4g PP
  40. Understanding unregulated PSU
  41. C3m C3g tubes
  42. More ebay craziness
  43. Shunt Capacitor
  44. 6021 Load Line
  45. TubeRiaa - How to calculate the impendance?
  46. Fake Vacuum Tube Amps - Funny but real
  47. 12.6v+ vs 6.3v+/- heater supply
  48. Distortion Measurements
  49. modifying kt88 pp ul amp
  50. Aikido help!
  51. Are Positive Grid Voltage Traces Necessary?
  52. New to Tubes
  53. How to read "Typical Characteristics" curves
  54. 12B4 pre output cap and LF instability
  55. attractive amp kit?
  56. Stereo 7O with transformer phase splitter?
  57. Filter Cap Recommendation
  58. New Guy...With a question...
  59. Interesting wiring guide find, thanks NASA!
  60. marantz 9's OPT data
  61. Why do my amps want signal ground and safety earth connected?
  62. scott 299c
  63. Tube Schematics
  64. JLTi EL34 and KT88 Amplifiers
  65. Radford sta15 looking for a nice preamp...
  66. Really subjective question
  67. Pen-toad Question
  68. Revox Model 40- leave it alone or dig in?
  69. Driver of Sumo Tubes PP for anybody: Shematic and PCB
  70. Output transformer from rowe ammi mm4
  71. Equivalent Circuit?
  72. 300b tube life
  73. CBS tube?
  74. Looking for a 700vdc supply
  75. Are all 9-pin sockets the same?
  76. Problem with short Test
  77. Troubleshooting 12B4/RH84/Akai project
  78. hi-end vacuum tube phono preamplifier
  79. PCB help
  80. QUICK transformer Question HELP
  81. Configuring an AB class amp to work in pure A class
  82. SCott LK-48-B balance pot
  83. lost a tube
  84. Lee Laboratory - model 50 Cruiser
  85. 1/2 of 12AX7 in single envelope?
  86. 2 pairs of 8150's
  87. 8150 Tubes
  88. Capacitor/Choke value in SET buffer supply? (95 vdc B+)
  89. NJ Tube Auction
  90. pentode buffer
  91. Tube Buffer? 12ax7?
  92. What is this tube?
  93. Kits
  94. Power supply high voltage problems with Melos amp.
  95. 811A Class A2 with Power Drive
  96. Help ID this 12AX7/EL84 Console(?) Amp
  97. Eico HF-86
  98. Marantz 9 Filter CHOKE value??
  99. 10M45s: strange behaviour @ 100mA
  100. LtSpice - Russian tube models
  101. Before I buy KT88's
  102. Ultra Low Cost 6P1P Push Pull Schematic,PCB
  103. 300B SE amp: One more one
  104. Already found problem with new amp
  105. LtSpice transformer - confusion
  106. OPUS 5.0 A Modern Mullard
  107. EL34 PP New Design of newbie
  108. Tubelabs SE vs. Simple SE ??
  109. Somebody knows about Lorenz e84l?(real Lorenz)
  110. Aikido Heater PSU help
  111. ecc99 with which Interstage Transformer?
  112. Looking for Audio Research Caps
  113. 2A3 SE Problem
  114. One knob tone control
  115. Tube Base Application ?
  116. The no-brainer project, some questions
  117. schematic request Yarland FV34AIII
  118. SY/Pete Millett Crossover
  119. Please don't stone me. . . .
  120. Golden Tube
  121. BH Curve & OPT choices
  122. Scott Transformers
  123. Identifying transformers
  124. Need Help understanding a triode fed LTP.
  125. How to measure and adjust bias
  126. Another cheap tube amp from China
  127. where to add master volume/gain/tone to Bogen L330?
  128. Another Williamson
  129. Weird EL84 PP behavior
  130. 300B SE Design
  131. Tube/Valve Shop in BERLIN
  132. Aikido buffer/gain selector?
  133. Gaijin friendly audio shop in Tokyo area?
  134. Troubleshooting channel dropout
  135. "groundbus" is this right?
  136. About New Production Tubes
  137. suche JJ E88CC oder 6922 Sovtek in Berlin
  138. 8ohm output transformer with a 4ohm load
  139. Power transformer - good for anything?
  140. Beginner question, swap .047uf for .05uf?
  141. Tetra phono stage
  142. Japanese OPTs
  143. Changing secondary voltage (Uncivilized way)
  144. 4EH7 opinions anyone?
  145. Silvertone 45A tubes....rare variant
  146. single 12AT7 in a tubelab simple se
  147. Finished the "big one"!
  148. CV428 or 5B254M useful?
  149. How about making your own tubes?!
  150. entry level int-amp?
  151. What Cap Is This?
  152. help please with kt-88 ultralinear o/p transformer
  153. A flea thingy that sounds good
  154. Mullard vs. Williamson 60W UL PP amp. Which one?
  155. Need help with PSUD II model
  156. 5v to 2.5v for 2a3 filament
  157. Does 2A3 require a grid stopper?
  158. Hammond ECL86/6GW8 conversion
  159. Connecting two opt's to act as one.
  160. Usefullness of tubes
  161. twisted/isolated/shielded wires?
  162. Feedback question
  163. What tubes for a tube amp?
  164. SE-OPTs
  165. Phase splitting using directly heated tubes?
  166. Change EL84 from Triode to Ultra linear
  167. DC hybrid folded-cascode for Schade
  168. New UK Manufacturer of Valves
  169. Can any here explain the JHS designation?
  170. Too good to be true???
  171. Judging a tube's condition
  172. EF86 tube preamp
  173. 6EM7 SET Headamp
  174. Are these ALL really EL34 subs?
  175. parallel tubes
  176. Changing the frequency of AC from mains to lower, out of audible range???
  177. Se 6550
  178. New Suppo Audio EL34 amp
  179. 60Watt+ valve design wanted
  180. Interesting tube on e-bay for trans atlantic cable
  181. Need help solving problem on new 2A3 build
  182. Tube and Passive Preamps-Auto Transformers for Attenuators/Volume Control - Overview
  183. Where bay M6 lamination (M4,M2) metal for transformer
  184. dynamic pentode screen draw
  185. Tube Sockets
  186. Circuit Ideas for the 815 (martian tube)
  187. Old Tektronix unit, usefull?
  188. my transformer output has a center tap: what do I do with this?
  189. 6AV5GA amp?
  190. Phase splitter idea
  191. Lowering noise in small signal pentodes?
  192. Articles from the past
  193. Help for LTP/CCS plus cathode follower
  194. Conrad Johnson PV-5, my next project, some simple questions
  195. ALTEC 1566a (DiY...if)
  196. Friday Night Fun with a ST-70
  197. Aikido All-In-One Octal Heater Troubles
  198. transimpedance amplifier
  199. Jaehong Lee OTL
  200. What tube bases to support for a new tube curve tracer
  201. 6GE5 in driver service for class B P-P
  202. Replace Electrolytics?
  203. Can OT's couple?
  204. before i drill Simple SE Chassis Seperation of input and output
  205. gates m-3638 preamp
  206. Oversized caps (PS and coupling) in RH84: Problem?
  207. What makes a great concertina triode?
  208. Luxman SQ5A
  209. Spice model with grid current 12ax7
  210. converting a magnavox pp 6v6 in triode mode
  211. 6V6 filaments in series
  212. my loud valve preamp
  213. Tranformer for Chinese pre amp (6N11) ?
  214. 1 watt desk speaker
  215. PE06/40 replacement
  216. Salvaged console tube reciever
  217. EF86 swap for 6BQ5 reverb?
  218. Yaqin CD3 Impressions and Internals
  219. svetlana 6D22S heater issues/question
  220. Unity-Gain EL84 Push-Pull Power Buffer
  221. Tube rectifier input capacitance
  222. Borbely hybrid Tube-MOSFET opamp
  223. Help! Tube Rolling
  224. Articles on Global Feedback
  225. Symetrical out low Zout
  226. Any Rimlock PCB sockets out there?
  227. 12SN7 Round Plate Tung Sol--is there such a thing?
  228. Vintage 2a3 tube amp
  229. Balance in CCS Long Tailed Pairs
  230. Audioromy 813 Mains Transformer
  231. Hello all, Im new from Spain, sorry for my english, and problems with my music angel
  232. use 120V x 2 for Aikido octal transformer?
  233. P-P O/P Trafo with only 2 tubes insead of 4?
  234. Eico HF-87 refurb
  235. Which SS CCS for the plate load on a 6N1P?
  236. Um, Can I do this?
  237. Eico power supply trouble (hlp plz)
  238. TV live regulator to tube preamp
  239. How to Spec Headphone output transformers
  240. Can I enlarge the mounting hole on Mosfet?
  241. Meng Yue 6P1
  242. Finding triode curves
  243. Critique my schematic 12ay7 linestage
  244. Suppresor Grid used for Feedback?
  245. Power Cascode
  246. Audio grade components
  247. Line Voltage with Yaqin MC-100B amp
  248. heater warmup and b+ delay
  249. BAL to UNBAL DAC buffer
  250. Counterpoint SA-7 - need a pic of the inside

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