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  1. Heater wiring approaches
  2. Rogers pops, crackle and static are driving me mad!
  3. tube power enough?
  4. Ever notice those scratches on some plates??
  5. JE 45/2A3 SE 2001 edition
  6. Mini tube output stage
  7. Mismatched Power Tubes
  8. Eimac 35TG amplifier glows !
  9. ECC88 Shield
  10. One amp channel for mid, the other for tweeter, to SE or to PP, THAT is the Question?
  11. SRRP Output stage. Calculating power output.
  12. bogen chb-35
  13. Rating for resistors in power supply?
  14. Effects of Bias /Ammeters....
  15. pentode mode distortion 6LR8? George?
  16. Info for 6b4g PP
  17. Understanding unregulated PSU
  18. C3m C3g tubes
  19. More ebay craziness
  20. Shunt Capacitor
  21. 6021 Load Line
  22. TubeRiaa - How to calculate the impendance?
  23. Fake Vacuum Tube Amps - Funny but real
  24. 12.6v+ vs 6.3v+/- heater supply
  25. Distortion Measurements
  26. modifying kt88 pp ul amp
  27. Aikido help!
  28. Are Positive Grid Voltage Traces Necessary?
  29. New to Tubes
  30. How to read "Typical Characteristics" curves
  31. 12B4 pre output cap and LF instability
  32. attractive amp kit?
  33. Stereo 7O with transformer phase splitter?
  34. Filter Cap Recommendation
  35. New Guy...With a question...
  36. Interesting wiring guide find, thanks NASA!
  37. marantz 9's OPT data
  38. Why do my amps want signal ground and safety earth connected?
  39. scott 299c
  40. Tube Schematics
  41. JLTi EL34 and KT88 Amplifiers
  42. Radford sta15 looking for a nice preamp...
  43. Really subjective question
  44. Pen-toad Question
  45. Revox Model 40- leave it alone or dig in?
  46. Driver of Sumo Tubes PP for anybody: Shematic and PCB
  47. Output transformer from rowe ammi mm4
  48. Equivalent Circuit?
  49. 300b tube life
  50. CBS tube?
  51. Looking for a 700vdc supply
  52. Are all 9-pin sockets the same?
  53. Problem with short Test
  54. Troubleshooting 12B4/RH84/Akai project
  55. hi-end vacuum tube phono preamplifier
  56. PCB help
  57. QUICK transformer Question HELP
  58. Configuring an AB class amp to work in pure A class
  59. SCott LK-48-B balance pot
  60. lost a tube
  61. Lee Laboratory - model 50 Cruiser
  62. 1/2 of 12AX7 in single envelope?
  63. 2 pairs of 8150's
  64. 8150 Tubes
  65. Capacitor/Choke value in SET buffer supply? (95 vdc B+)
  66. NJ Tube Auction
  67. pentode buffer
  68. Tube Buffer? 12ax7?
  69. What is this tube?
  70. Kits
  71. Power supply high voltage problems with Melos amp.
  72. 811A Class A2 with Power Drive
  73. Help ID this 12AX7/EL84 Console(?) Amp
  74. Eico HF-86
  75. Marantz 9 Filter CHOKE value??
  76. 10M45s: strange behaviour @ 100mA
  77. LtSpice - Russian tube models
  78. Before I buy KT88's
  79. Ultra Low Cost 6P1P Push Pull Schematic,PCB
  80. 300B SE amp: One more one
  81. Already found problem with new amp
  82. LtSpice transformer - confusion
  83. OPUS 5.0 A Modern Mullard
  84. EL34 PP New Design of newbie
  85. Somebody knows about Lorenz e84l?(real Lorenz)
  86. Aikido Heater PSU help
  87. ecc99 with which Interstage Transformer?
  88. Looking for Audio Research Caps
  89. 2A3 SE Problem
  90. One knob tone control
  91. Tube Base Application ?
  92. The no-brainer project, some questions
  93. schematic request Yarland FV34AIII
  94. SY/Pete Millett Crossover
  95. Please don't stone me. . . .
  96. Golden Tube
  97. BH Curve & OPT choices
  98. Scott Transformers
  99. Identifying transformers
  100. Need Help understanding a triode fed LTP.
  101. How to measure and adjust bias
  102. Another cheap tube amp from China
  103. where to add master volume/gain/tone to Bogen L330?
  104. Another Williamson
  105. Weird EL84 PP behavior
  106. 300B SE Design
  107. Tube/Valve Shop in BERLIN
  108. Aikido buffer/gain selector?
  109. Gaijin friendly audio shop in Tokyo area?
  110. Troubleshooting channel dropout
  111. "groundbus" is this right?
  112. About New Production Tubes
  113. suche JJ E88CC oder 6922 Sovtek in Berlin
  114. 8ohm output transformer with a 4ohm load
  115. Power transformer - good for anything?
  116. Beginner question, swap .047uf for .05uf?
  117. Tetra phono stage
  118. Japanese OPTs
  119. Changing secondary voltage (Uncivilized way)
  120. 4EH7 opinions anyone?
  121. Silvertone 45A tubes....rare variant
  122. Finished the "big one"!
  123. CV428 or 5B254M useful?
  124. How about making your own tubes?!
  125. entry level int-amp?
  126. What Cap Is This?
  127. help please with kt-88 ultralinear o/p transformer
  128. A flea thingy that sounds good
  129. Mullard vs. Williamson 60W UL PP amp. Which one?
  130. Need help with PSUD II model
  131. 5v to 2.5v for 2a3 filament
  132. Does 2A3 require a grid stopper?
  133. Hammond ECL86/6GW8 conversion
  134. Connecting two opt's to act as one.
  135. Usefullness of tubes
  136. twisted/isolated/shielded wires?
  137. Feedback question
  138. What tubes for a tube amp?
  139. SE-OPTs
  140. Phase splitting using directly heated tubes?
  141. Change EL84 from Triode to Ultra linear
  142. DC hybrid folded-cascode for Schade
  143. New UK Manufacturer of Valves
  144. Can any here explain the JHS designation?
  145. Too good to be true???
  146. Judging a tube's condition
  147. EF86 tube preamp
  148. 6EM7 SET Headamp
  149. Are these ALL really EL34 subs?
  150. parallel tubes
  151. Changing the frequency of AC from mains to lower, out of audible range???
  152. Se 6550
  153. New Suppo Audio EL34 amp
  154. 60Watt+ valve design wanted
  155. Interesting tube on e-bay for trans atlantic cable
  156. Need help solving problem on new 2A3 build
  157. Tube and Passive Preamps-Auto Transformers for Attenuators/Volume Control - Overview
  158. Where bay M6 lamination (M4,M2) metal for transformer
  159. dynamic pentode screen draw
  160. Tube Sockets
  161. Circuit Ideas for the 815 (martian tube)
  162. Old Tektronix unit, usefull?
  163. my transformer output has a center tap: what do I do with this?
  164. 6AV5GA amp?
  165. Phase splitter idea
  166. Lowering noise in small signal pentodes?
  167. Articles from the past
  168. Help for LTP/CCS plus cathode follower
  169. Conrad Johnson PV-5, my next project, some simple questions
  170. ALTEC 1566a (DiY...if)
  171. Friday Night Fun with a ST-70
  172. Aikido All-In-One Octal Heater Troubles
  173. transimpedance amplifier
  174. Jaehong Lee OTL
  175. What tube bases to support for a new tube curve tracer
  176. 6GE5 in driver service for class B P-P
  177. Replace Electrolytics?
  178. Can OT's couple?
  179. gates m-3638 preamp
  180. Oversized caps (PS and coupling) in RH84: Problem?
  181. What makes a great concertina triode?
  182. Luxman SQ5A
  183. Spice model with grid current 12ax7
  184. converting a magnavox pp 6v6 in triode mode
  185. 6V6 filaments in series
  186. my loud valve preamp
  187. Tranformer for Chinese pre amp (6N11) ?
  188. 1 watt desk speaker
  189. PE06/40 replacement
  190. Salvaged console tube reciever
  191. EF86 swap for 6BQ5 reverb?
  192. Yaqin CD3 Impressions and Internals
  193. svetlana 6D22S heater issues/question
  194. Unity-Gain EL84 Push-Pull Power Buffer
  195. Tube rectifier input capacitance
  196. Borbely hybrid Tube-MOSFET opamp
  197. Help! Tube Rolling
  198. Articles on Global Feedback
  199. Symetrical out low Zout
  200. Any Rimlock PCB sockets out there?
  201. 12SN7 Round Plate Tung Sol--is there such a thing?
  202. Vintage 2a3 tube amp
  203. Balance in CCS Long Tailed Pairs
  204. Audioromy 813 Mains Transformer
  205. Hello all, Im new from Spain, sorry for my english, and problems with my music angel
  206. use 120V x 2 for Aikido octal transformer?
  207. P-P O/P Trafo with only 2 tubes insead of 4?
  208. Eico HF-87 refurb
  209. Which SS CCS for the plate load on a 6N1P?
  210. Um, Can I do this?
  211. Eico power supply trouble (hlp plz)
  212. TV live regulator to tube preamp
  213. How to Spec Headphone output transformers
  214. Can I enlarge the mounting hole on Mosfet?
  215. Meng Yue 6P1
  216. Finding triode curves
  217. Critique my schematic 12ay7 linestage
  218. Suppresor Grid used for Feedback?
  219. Power Cascode
  220. Audio grade components
  221. Line Voltage with Yaqin MC-100B amp
  222. heater warmup and b+ delay
  223. BAL to UNBAL DAC buffer
  224. Counterpoint SA-7 - need a pic of the inside
  225. Are Chinese 6N2 the same as Russian 6N2P?
  226. New project; Musical Machine
  227. 4D32 SE amp, a few more questions
  228. Static shock with simple se
  229. Old electrolytic caps ok? MOSCODE 600
  230. Transformer Flux Band Tips and Tricks?
  231. What tube config will get this sound?
  232. On cleaning transformers
  233. My first project ELEKIT TU-870R
  234. DC7 MkII :New Schade 6080 amp.
  235. current driver tube amplifier
  236. A DC coupled headphones amp
  237. Ebay trader zhangsheng
  238. decware kits worth it?
  239. Simple test for transformer frequency response?
  240. Power Trans. Load Test
  241. Replacing Cap Across Filter Cap
  242. Regulate HV preamp with floating LM317?
  243. Rogers cadet 3
  244. Output impedance tap considerations.....
  245. Amp switch safety load
  246. MF X-10D replica problem
  247. Nice triode
  248. Low gain preamplifier
  249. Improving a Maple Tree Audio PS 2 power supply
  250. Baby Huey-ish phono?

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