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  1. Shunt Capacitor
  2. 6021 Load Line
  3. TubeRiaa - How to calculate the impendance?
  4. Fake Vacuum Tube Amps - Funny but real
  5. 12.6v+ vs 6.3v+/- heater supply
  6. Distortion Measurements
  7. modifying kt88 pp ul amp
  8. Aikido help!
  9. Are Positive Grid Voltage Traces Necessary?
  10. New to Tubes
  11. How to read "Typical Characteristics" curves
  12. 12B4 pre output cap and LF instability
  13. attractive amp kit?
  14. Stereo 7O with transformer phase splitter?
  15. Filter Cap Recommendation
  16. New Guy...With a question...
  17. Interesting wiring guide find, thanks NASA!
  18. marantz 9's OPT data
  19. Why do my amps want signal ground and safety earth connected?
  20. scott 299c
  21. Tube Schematics
  22. JLTi EL34 and KT88 Amplifiers
  23. Radford sta15 looking for a nice preamp...
  24. Really subjective question
  25. Pen-toad Question
  26. Revox Model 40- leave it alone or dig in?
  27. Driver of Sumo Tubes PP for anybody: Shematic and PCB
  28. Output transformer from rowe ammi mm4
  29. Equivalent Circuit?
  30. 300b tube life
  31. CBS tube?
  32. Looking for a 700vdc supply
  33. Are all 9-pin sockets the same?
  34. Problem with short Test
  35. Troubleshooting 12B4/RH84/Akai project
  36. hi-end vacuum tube phono preamplifier
  37. PCB help
  38. QUICK transformer Question HELP
  39. Configuring an AB class amp to work in pure A class
  40. SCott LK-48-B balance pot
  41. lost a tube
  42. Lee Laboratory - model 50 Cruiser
  43. 1/2 of 12AX7 in single envelope?
  44. 2 pairs of 8150's
  45. AX84 Clean Preamp
  46. 8150 Tubes
  47. Capacitor/Choke value in SET buffer supply? (95 vdc B+)
  48. NJ Tube Auction
  49. pentode buffer
  50. Tube Buffer? 12ax7?
  51. What is this tube?
  52. Kits
  53. Power supply high voltage problems with Melos amp.
  54. 811A Class A2 with Power Drive
  55. Help ID this 12AX7/EL84 Console(?) Amp
  56. Eico HF-86
  57. Marantz 9 Filter CHOKE value??
  58. 10M45s: strange behaviour @ 100mA
  59. LtSpice - Russian tube models
  60. Before I buy KT88's
  61. Ultra Low Cost 6P1P Push Pull Schematic,PCB
  62. adding reverb to Bassman circuit
  63. 300B SE amp: One more one
  64. Already found problem with new amp
  65. LtSpice transformer - confusion
  66. OPUS 5.0 A Modern Mullard
  67. EL34 PP New Design of newbie
  68. Tubelabs SE vs. Simple SE ??
  69. Somebody knows about Lorenz e84l?(real Lorenz)
  70. Aikido Heater PSU help
  71. ecc99 with which Interstage Transformer?
  72. Looking for Audio Research Caps
  73. 2A3 SE Problem
  74. One knob tone control
  75. Tube Base Application ?
  76. The no-brainer project, some questions
  77. schematic request Yarland FV34AIII
  78. SY/Pete Millett Crossover
  79. Please don't stone me. . . .
  80. Golden Tube
  81. BH Curve & OPT choices
  82. Scott Transformers
  83. Identifying transformers
  84. Need Help understanding a triode fed LTP.
  85. How to measure and adjust bias
  86. Another cheap tube amp from China
  87. where to add master volume/gain/tone to Bogen L330?
  88. Another Williamson
  89. Weird EL84 PP behavior
  90. 300B SE Design
  91. Tube/Valve Shop in BERLIN
  92. Aikido buffer/gain selector?
  93. Gaijin friendly audio shop in Tokyo area?
  94. Troubleshooting channel dropout
  95. "groundbus" is this right?
  96. About New Production Tubes
  97. suche JJ E88CC oder 6922 Sovtek in Berlin
  98. 8ohm output transformer with a 4ohm load
  99. Power transformer - good for anything?
  100. Beginner question, swap .047uf for .05uf?
  101. Tetra phono stage
  102. Japanese OPTs
  103. Changing secondary voltage (Uncivilized way)
  104. 4EH7 opinions anyone?
  105. Silvertone 45A tubes....rare variant
  106. single 12AT7 in a tubelab simple se
  107. Finished the "big one"!
  108. CV428 or 5B254M useful?
  109. How about making your own tubes?!
  110. entry level int-amp?
  111. What Cap Is This?
  112. help please with kt-88 ultralinear o/p transformer
  113. A flea thingy that sounds good
  114. Mullard vs. Williamson 60W UL PP amp. Which one?
  115. Need help with PSUD II model
  116. 5v to 2.5v for 2a3 filament
  117. Does 2A3 require a grid stopper?
  118. Hammond ECL86/6GW8 conversion
  119. Connecting two opt's to act as one.
  120. Usefullness of tubes
  121. twisted/isolated/shielded wires?
  122. Feedback question
  123. What tubes for a tube amp?
  124. SE-OPTs
  125. Phase splitting using directly heated tubes?
  126. Change EL84 from Triode to Ultra linear
  127. DC hybrid folded-cascode for Schade
  128. New UK Manufacturer of Valves
  129. Can any here explain the JHS designation?
  130. Too good to be true???
  131. Judging a tube's condition
  132. EF86 tube preamp
  133. Any tips for snap in type caps to replace solder lug cans?
  134. 6EM7 SET Headamp
  135. Are these ALL really EL34 subs?
  136. parallel tubes
  137. Changing the frequency of AC from mains to lower, out of audible range???
  138. Se 6550
  139. New Suppo Audio EL34 amp
  140. 60Watt+ valve design wanted
  141. Interesting tube on e-bay for trans atlantic cable
  142. Need help solving problem on new 2A3 build
  143. Tube and Passive Preamps-Auto Transformers for Attenuators/Volume Control - Overview
  144. Peavey Classic 30 - Squeal
  145. Where bay M6 lamination (M4,M2) metal for transformer
  146. dynamic pentode screen draw
  147. Tube Sockets
  148. Circuit Ideas for the 815 (martian tube)
  149. Old Tektronix unit, usefull?
  150. my transformer output has a center tap: what do I do with this?
  151. 6AV5GA amp?
  152. Phase splitter idea
  153. Lowering noise in small signal pentodes?
  154. Articles from the past
  155. tube upgrade for vintage orange 120
  156. Help for LTP/CCS plus cathode follower
  157. Conrad Johnson PV-5, my next project, some simple questions
  158. ALTEC 1566a (DiY...if)
  159. Friday Night Fun with a ST-70
  160. Aikido All-In-One Octal Heater Troubles
  161. Guitar tube amp OT Calculation/Winding HELP!
  162. transimpedance amplifier
  163. Jaehong Lee OTL
  164. What tube bases to support for a new tube curve tracer
  165. 6GE5 in driver service for class B P-P
  166. Replace Electrolytics?
  167. Can OT's couple?
  168. tube solid state hybrid guitar amp, looking for schematic
  169. before i drill Simple SE Chassis Seperation of input and output
  170. gates m-3638 preamp
  171. Oversized caps (PS and coupling) in RH84: Problem?
  172. What makes a great concertina triode?
  173. Luxman SQ5A
  174. Spice model with grid current 12ax7
  175. converting a magnavox pp 6v6 in triode mode
  176. 3-leaded russian PIO caps
  177. 6V6 filaments in series
  178. my loud valve preamp
  179. Tranformer for Chinese pre amp (6N11) ?
  180. 1 watt desk speaker
  181. PE06/40 replacement
  182. Salvaged console tube reciever
  183. EF86 swap for 6BQ5 reverb?
  184. Yaqin CD3 Impressions and Internals
  185. svetlana 6D22S heater issues/question
  186. Unity-Gain EL84 Push-Pull Power Buffer
  187. Tube rectifier input capacitance
  188. Borbely hybrid Tube-MOSFET opamp
  189. Help! Tube Rolling
  190. Articles on Global Feedback
  191. Symetrical out low Zout
  192. Any Rimlock PCB sockets out there?
  193. 12SN7 Round Plate Tung Sol--is there such a thing?
  194. Vintage 2a3 tube amp
  195. Balance in CCS Long Tailed Pairs
  196. Audioromy 813 Mains Transformer
  197. Hello all, Im new from Spain, sorry for my english, and problems with my music angel
  198. use 120V x 2 for Aikido octal transformer?
  199. P-P O/P Trafo with only 2 tubes insead of 4?
  200. Eico HF-87 refurb
  201. Which SS CCS for the plate load on a 6N1P?
  202. Um, Can I do this?
  203. Eico power supply trouble (hlp plz)
  204. TV live regulator to tube preamp
  205. How to Spec Headphone output transformers
  206. Can I enlarge the mounting hole on Mosfet?
  207. Meng Yue 6P1
  208. Finding triode curves
  209. Critique my schematic 12ay7 linestage
  210. Suppresor Grid used for Feedback?
  211. Power Cascode
  212. Audio grade components
  213. Line Voltage with Yaqin MC-100B amp
  214. heater warmup and b+ delay
  215. BAL to UNBAL DAC buffer
  216. Counterpoint SA-7 - need a pic of the inside
  217. Are Chinese 6N2 the same as Russian 6N2P?
  218. New project; Musical Machine
  219. 4D32 SE amp, a few more questions
  220. Static shock with simple se
  221. Old electrolytic caps ok? MOSCODE 600
  222. Transformer Flux Band Tips and Tricks?
  223. What tube config will get this sound?
  224. On cleaning transformers
  225. My first project ELEKIT TU-870R
  226. DC7 MkII :New Schade 6080 amp.
  227. current driver tube amplifier
  228. A DC coupled headphones amp
  229. Ebay trader zhangsheng
  230. decware kits worth it?
  231. Simple test for transformer frequency response?
  232. Modular guitar tube amp power supply - interface concerns
  233. Vacuum Tube Voltmeters
  234. Power Trans. Load Test
  235. Replacing Cap Across Filter Cap
  236. Regulate HV preamp with floating LM317?
  237. Rogers cadet 3
  238. AC15 Heritage Project w/ Sound Clips
  239. Output impedance tap considerations.....
  240. Amp switch safety load
  241. MF X-10D replica problem
  242. Nice triode
  243. Low gain preamplifier
  244. Improving a Maple Tree Audio PS 2 power supply
  245. Baby Huey-ish phono?
  246. New? Local Feedback Method
  247. PSUD Help Needed: What value do I enter for current?
  248. Question on WE310
  249. How do you calculate choke size in a power supply?
  250. tubecad and tubecad se

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