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  1. Paralell 10M45's for 71A DHT filament?
  2. Rod Coleman CCS/gyrator help
  3. Differential amp.Do they pass 2nd harmonics or reject them?
  4. A half 6sl7 tube
  5. failing tube
  6. Capacitor in series - Resistor across ?
  7. Tube preamp choise...
  8. Some general tube questions from a Tube newbie !!
  9. How unsafe is an Autotransformer?
  10. Can a dual triode use a common cathode resistor?
  11. Dared MC-7P
  12. SRC2496 Miniatube tube output stage
  13. Tubetech smc2b multiband compressor
  14. Tweaking/correction question - Xindak MT-1 balance
  15. HELP! ELNA CERAFINE 500V Caps
  16. Em87/ em84
  17. Pioneer SM-83 restoration
  18. Best GM70 version suited for audio??
  19. PSUDII transformer question
  20. what are these caps doing?
  21. Distortion VS OPT impedence
  22. Heater wiring approaches
  23. Rogers pops, crackle and static are driving me mad!
  24. tube power enough?
  25. Ever notice those scratches on some plates??
  26. JE 45/2A3 SE 2001 edition
  27. Difficult Time Finding Replacement Caps
  28. Mini tube output stage
  29. Mismatched Power Tubes
  30. Eimac 35TG amplifier glows !
  31. ECC88 Shield
  32. One amp channel for mid, the other for tweeter, to SE or to PP, THAT is the Question?
  33. SRRP Output stage. Calculating power output.
  34. bogen chb-35
  35. Rating for resistors in power supply?
  36. Effects of Bias /Ammeters....
  37. pentode mode distortion 6LR8? George?
  38. Info for 6b4g PP
  39. Understanding unregulated PSU
  40. C3m C3g tubes
  41. More ebay craziness
  42. Shunt Capacitor
  43. 6021 Load Line
  44. TubeRiaa - How to calculate the impendance?
  45. Fake Vacuum Tube Amps - Funny but real
  46. 12.6v+ vs 6.3v+/- heater supply
  47. Distortion Measurements
  48. modifying kt88 pp ul amp
  49. Aikido help!
  50. Are Positive Grid Voltage Traces Necessary?
  51. New to Tubes
  52. How to read "Typical Characteristics" curves
  53. 12B4 pre output cap and LF instability
  54. attractive amp kit?
  55. Stereo 7O with transformer phase splitter?
  56. Filter Cap Recommendation
  57. New Guy...With a question...
  58. Interesting wiring guide find, thanks NASA!
  59. marantz 9's OPT data
  60. Why do my amps want signal ground and safety earth connected?
  61. scott 299c
  62. Tube Schematics
  63. JLTi EL34 and KT88 Amplifiers
  64. Radford sta15 looking for a nice preamp...
  65. Really subjective question
  66. Pen-toad Question
  67. Revox Model 40- leave it alone or dig in?
  68. Driver of Sumo Tubes PP for anybody: Shematic and PCB
  69. Output transformer from rowe ammi mm4
  70. Equivalent Circuit?
  71. 300b tube life
  72. CBS tube?
  73. Looking for a 700vdc supply
  74. Are all 9-pin sockets the same?
  75. Problem with short Test
  76. Troubleshooting 12B4/RH84/Akai project
  77. hi-end vacuum tube phono preamplifier
  78. PCB help
  79. QUICK transformer Question HELP
  80. Configuring an AB class amp to work in pure A class
  81. SCott LK-48-B balance pot
  82. lost a tube
  83. Lee Laboratory - model 50 Cruiser
  84. 1/2 of 12AX7 in single envelope?
  85. 2 pairs of 8150's
  86. AX84 Clean Preamp
  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. adding reverb to Bassman circuit
  104. 300B SE amp: One more one
  105. Already found problem with new amp
  106. LtSpice transformer - confusion
  107. OPUS 5.0 A Modern Mullard
  108. EL34 PP New Design of newbie
  109. Tubelabs SE vs. Simple SE ??
  110. Somebody knows about Lorenz e84l?(real Lorenz)
  111. Aikido Heater PSU help
  112. ecc99 with which Interstage Transformer?
  113. Looking for Audio Research Caps
  114. 2A3 SE Problem
  115. One knob tone control
  116. Tube Base Application ?
  117. The no-brainer project, some questions
  118. schematic request Yarland FV34AIII
  119. SY/Pete Millett Crossover
  120. Please don't stone me. . . .
  121. Golden Tube
  122. BH Curve & OPT choices
  123. Scott Transformers
  124. Identifying transformers
  125. Need Help understanding a triode fed LTP.
  126. How to measure and adjust bias
  127. Another cheap tube amp from China
  128. where to add master volume/gain/tone to Bogen L330?
  129. Another Williamson
  130. Weird EL84 PP behavior
  131. 300B SE Design
  132. Tube/Valve Shop in BERLIN
  133. Aikido buffer/gain selector?
  134. Gaijin friendly audio shop in Tokyo area?
  135. Troubleshooting channel dropout
  136. "groundbus" is this right?
  137. About New Production Tubes
  138. suche JJ E88CC oder 6922 Sovtek in Berlin
  139. 8ohm output transformer with a 4ohm load
  140. Power transformer - good for anything?
  141. Beginner question, swap .047uf for .05uf?
  142. Tetra phono stage
  143. Japanese OPTs
  144. Changing secondary voltage (Uncivilized way)
  145. 4EH7 opinions anyone?
  146. Silvertone 45A tubes....rare variant
  147. single 12AT7 in a tubelab simple se
  148. Finished the "big one"!
  149. CV428 or 5B254M useful?
  150. How about making your own tubes?!
  151. entry level int-amp?
  152. What Cap Is This?
  153. help please with kt-88 ultralinear o/p transformer
  154. A flea thingy that sounds good
  155. Mullard vs. Williamson 60W UL PP amp. Which one?
  156. Need help with PSUD II model
  157. 5v to 2.5v for 2a3 filament
  158. Does 2A3 require a grid stopper?
  159. Hammond ECL86/6GW8 conversion
  160. Connecting two opt's to act as one.
  161. Usefullness of tubes
  162. twisted/isolated/shielded wires?
  163. Feedback question
  164. What tubes for a tube amp?
  165. SE-OPTs
  166. Phase splitting using directly heated tubes?
  167. Change EL84 from Triode to Ultra linear
  168. DC hybrid folded-cascode for Schade
  169. New UK Manufacturer of Valves
  170. Can any here explain the JHS designation?
  171. Too good to be true???
  172. Judging a tube's condition
  173. EF86 tube preamp
  174. Any tips for snap in type caps to replace solder lug cans?
  175. 6EM7 SET Headamp
  176. Are these ALL really EL34 subs?
  177. parallel tubes
  178. Changing the frequency of AC from mains to lower, out of audible range???
  179. Se 6550
  180. New Suppo Audio EL34 amp
  181. 60Watt+ valve design wanted
  182. Interesting tube on e-bay for trans atlantic cable
  183. Need help solving problem on new 2A3 build
  184. Tube and Passive Preamps-Auto Transformers for Attenuators/Volume Control - Overview
  185. Peavey Classic 30 - Squeal
  186. Where bay M6 lamination (M4,M2) metal for transformer
  187. dynamic pentode screen draw
  188. Tube Sockets
  189. Circuit Ideas for the 815 (martian tube)
  190. Old Tektronix unit, usefull?
  191. my transformer output has a center tap: what do I do with this?
  192. 6AV5GA amp?
  193. Phase splitter idea
  194. Lowering noise in small signal pentodes?
  195. Articles from the past
  196. tube upgrade for vintage orange 120
  197. Help for LTP/CCS plus cathode follower
  198. Conrad Johnson PV-5, my next project, some simple questions
  199. ALTEC 1566a (DiY...if)
  200. Friday Night Fun with a ST-70
  201. Aikido All-In-One Octal Heater Troubles
  202. Guitar tube amp OT Calculation/Winding HELP!
  203. transimpedance amplifier
  204. Jaehong Lee OTL
  205. What tube bases to support for a new tube curve tracer
  206. 6GE5 in driver service for class B P-P
  207. Replace Electrolytics?
  208. Can OT's couple?
  209. tube solid state hybrid guitar amp, looking for schematic
  210. before i drill Simple SE Chassis Seperation of input and output
  211. gates m-3638 preamp
  212. Oversized caps (PS and coupling) in RH84: Problem?
  213. What makes a great concertina triode?
  214. Luxman SQ5A
  215. Spice model with grid current 12ax7
  216. converting a magnavox pp 6v6 in triode mode
  217. 3-leaded russian PIO caps
  218. 6V6 filaments in series
  219. my loud valve preamp
  220. Tranformer for Chinese pre amp (6N11) ?
  221. 1 watt desk speaker
  222. PE06/40 replacement
  223. Salvaged console tube reciever
  224. EF86 swap for 6BQ5 reverb?
  225. Yaqin CD3 Impressions and Internals
  226. svetlana 6D22S heater issues/question
  227. Unity-Gain EL84 Push-Pull Power Buffer
  228. Tube rectifier input capacitance
  229. Borbely hybrid Tube-MOSFET opamp
  230. Help! Tube Rolling
  231. Articles on Global Feedback
  232. Symetrical out low Zout
  233. Any Rimlock PCB sockets out there?
  234. 12SN7 Round Plate Tung Sol--is there such a thing?
  235. Vintage 2a3 tube amp
  236. Balance in CCS Long Tailed Pairs
  237. Audioromy 813 Mains Transformer
  238. Hello all, Im new from Spain, sorry for my english, and problems with my music angel
  239. use 120V x 2 for Aikido octal transformer?
  240. P-P O/P Trafo with only 2 tubes insead of 4?
  241. Eico HF-87 refurb
  242. Which SS CCS for the plate load on a 6N1P?
  243. Um, Can I do this?
  244. Eico power supply trouble (hlp plz)
  245. TV live regulator to tube preamp
  246. How to Spec Headphone output transformers
  247. Can I enlarge the mounting hole on Mosfet?
  248. Meng Yue 6P1
  249. Finding triode curves
  250. Critique my schematic 12ay7 linestage

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