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

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