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  1. ECC88 Shield
  2. One amp channel for mid, the other for tweeter, to SE or to PP, THAT is the Question?
  3. SRRP Output stage. Calculating power output.
  4. bogen chb-35
  5. Rating for resistors in power supply?
  6. Effects of Bias /Ammeters....
  7. pentode mode distortion 6LR8? George?
  8. Info for 6b4g PP
  9. Understanding unregulated PSU
  10. C3m C3g tubes
  11. More ebay craziness
  12. Shunt Capacitor
  13. 6021 Load Line
  14. TubeRiaa - How to calculate the impendance?
  15. Fake Vacuum Tube Amps - Funny but real
  16. 12.6v+ vs 6.3v+/- heater supply
  17. Distortion Measurements
  18. modifying kt88 pp ul amp
  19. Aikido help!
  20. Are Positive Grid Voltage Traces Necessary?
  21. New to Tubes
  22. How to read "Typical Characteristics" curves
  23. 12B4 pre output cap and LF instability
  24. attractive amp kit?
  25. Stereo 7O with transformer phase splitter?
  26. Filter Cap Recommendation
  27. New Guy...With a question...
  28. Interesting wiring guide find, thanks NASA!
  29. marantz 9's OPT data
  30. Why do my amps want signal ground and safety earth connected?
  31. scott 299c
  32. Tube Schematics
  33. JLTi EL34 and KT88 Amplifiers
  34. Radford sta15 looking for a nice preamp...
  35. Really subjective question
  36. Pen-toad Question
  37. Revox Model 40- leave it alone or dig in?
  38. Driver of Sumo Tubes PP for anybody: Shematic and PCB
  39. Output transformer from rowe ammi mm4
  40. Equivalent Circuit?
  41. 300b tube life
  42. CBS tube?
  43. Looking for a 700vdc supply
  44. Are all 9-pin sockets the same?
  45. Problem with short Test
  46. Troubleshooting 12B4/RH84/Akai project
  47. hi-end vacuum tube phono preamplifier
  48. PCB help
  49. QUICK transformer Question HELP
  50. Configuring an AB class amp to work in pure A class
  51. SCott LK-48-B balance pot
  52. lost a tube
  53. Lee Laboratory - model 50 Cruiser
  54. 1/2 of 12AX7 in single envelope?
  55. 2 pairs of 8150's
  56. AX84 Clean Preamp
  57. 8150 Tubes
  58. Capacitor/Choke value in SET buffer supply? (95 vdc B+)
  59. NJ Tube Auction
  60. pentode buffer
  61. Tube Buffer? 12ax7?
  62. What is this tube?
  63. Kits
  64. Power supply high voltage problems with Melos amp.
  65. 811A Class A2 with Power Drive
  66. Help ID this 12AX7/EL84 Console(?) Amp
  67. Eico HF-86
  68. Marantz 9 Filter CHOKE value??
  69. 10M45s: strange behaviour @ 100mA
  70. LtSpice - Russian tube models
  71. Before I buy KT88's
  72. Ultra Low Cost 6P1P Push Pull Schematic,PCB
  73. adding reverb to Bassman circuit
  74. 300B SE amp: One more one
  75. Already found problem with new amp
  76. LtSpice transformer - confusion
  77. OPUS 5.0 A Modern Mullard
  78. EL34 PP New Design of newbie
  79. Tubelabs SE vs. Simple SE ??
  80. Somebody knows about Lorenz e84l?(real Lorenz)
  81. Aikido Heater PSU help
  82. ecc99 with which Interstage Transformer?
  83. Looking for Audio Research Caps
  84. 2A3 SE Problem
  85. One knob tone control
  86. Tube Base Application ?
  87. The no-brainer project, some questions
  88. schematic request Yarland FV34AIII
  89. SY/Pete Millett Crossover
  90. Please don't stone me. . . .
  91. Golden Tube
  92. BH Curve & OPT choices
  93. Scott Transformers
  94. Identifying transformers
  95. Need Help understanding a triode fed LTP.
  96. How to measure and adjust bias
  97. Another cheap tube amp from China
  98. where to add master volume/gain/tone to Bogen L330?
  99. Another Williamson
  100. Weird EL84 PP behavior
  101. 300B SE Design
  102. Tube/Valve Shop in BERLIN
  103. Aikido buffer/gain selector?
  104. Gaijin friendly audio shop in Tokyo area?
  105. Troubleshooting channel dropout
  106. "groundbus" is this right?
  107. About New Production Tubes
  108. suche JJ E88CC oder 6922 Sovtek in Berlin
  109. 8ohm output transformer with a 4ohm load
  110. Power transformer - good for anything?
  111. Beginner question, swap .047uf for .05uf?
  112. Tetra phono stage
  113. Japanese OPTs
  114. Changing secondary voltage (Uncivilized way)
  115. 4EH7 opinions anyone?
  116. Silvertone 45A tubes....rare variant
  117. single 12AT7 in a tubelab simple se
  118. Finished the "big one"!
  119. CV428 or 5B254M useful?
  120. How about making your own tubes?!
  121. entry level int-amp?
  122. What Cap Is This?
  123. help please with kt-88 ultralinear o/p transformer
  124. A flea thingy that sounds good
  125. Mullard vs. Williamson 60W UL PP amp. Which one?
  126. Need help with PSUD II model
  127. 5v to 2.5v for 2a3 filament
  128. Does 2A3 require a grid stopper?
  129. Hammond ECL86/6GW8 conversion
  130. Connecting two opt's to act as one.
  131. Usefullness of tubes
  132. twisted/isolated/shielded wires?
  133. Feedback question
  134. What tubes for a tube amp?
  135. SE-OPTs
  136. Phase splitting using directly heated tubes?
  137. Change EL84 from Triode to Ultra linear
  138. DC hybrid folded-cascode for Schade
  139. New UK Manufacturer of Valves
  140. Can any here explain the JHS designation?
  141. Too good to be true???
  142. Judging a tube's condition
  143. EF86 tube preamp
  144. Any tips for snap in type caps to replace solder lug cans?
  145. 6EM7 SET Headamp
  146. Are these ALL really EL34 subs?
  147. parallel tubes
  148. Changing the frequency of AC from mains to lower, out of audible range???
  149. Se 6550
  150. New Suppo Audio EL34 amp
  151. 60Watt+ valve design wanted
  152. Interesting tube on e-bay for trans atlantic cable
  153. Need help solving problem on new 2A3 build
  154. Tube and Passive Preamps-Auto Transformers for Attenuators/Volume Control - Overview
  155. Peavey Classic 30 - Squeal
  156. Where bay M6 lamination (M4,M2) metal for transformer
  157. dynamic pentode screen draw
  158. Tube Sockets
  159. Circuit Ideas for the 815 (martian tube)
  160. Old Tektronix unit, usefull?
  161. my transformer output has a center tap: what do I do with this?
  162. 6AV5GA amp?
  163. Phase splitter idea
  164. Lowering noise in small signal pentodes?
  165. Articles from the past
  166. tube upgrade for vintage orange 120
  167. Help for LTP/CCS plus cathode follower
  168. Conrad Johnson PV-5, my next project, some simple questions
  169. ALTEC 1566a (DiY...if)
  170. Friday Night Fun with a ST-70
  171. Aikido All-In-One Octal Heater Troubles
  172. Guitar tube amp OT Calculation/Winding HELP!
  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. tube solid state hybrid guitar amp, looking for schematic
  180. before i drill Simple SE Chassis Seperation of input and output
  181. gates m-3638 preamp
  182. Oversized caps (PS and coupling) in RH84: Problem?
  183. What makes a great concertina triode?
  184. Luxman SQ5A
  185. Spice model with grid current 12ax7
  186. converting a magnavox pp 6v6 in triode mode
  187. 3-leaded russian PIO caps
  188. 6V6 filaments in series
  189. my loud valve preamp
  190. Tranformer for Chinese pre amp (6N11) ?
  191. 1 watt desk speaker
  192. PE06/40 replacement
  193. Salvaged console tube reciever
  194. EF86 swap for 6BQ5 reverb?
  195. Yaqin CD3 Impressions and Internals
  196. svetlana 6D22S heater issues/question
  197. Unity-Gain EL84 Push-Pull Power Buffer
  198. Tube rectifier input capacitance
  199. Borbely hybrid Tube-MOSFET opamp
  200. Help! Tube Rolling
  201. Articles on Global Feedback
  202. Symetrical out low Zout
  203. Any Rimlock PCB sockets out there?
  204. 12SN7 Round Plate Tung Sol--is there such a thing?
  205. Vintage 2a3 tube amp
  206. Balance in CCS Long Tailed Pairs
  207. Audioromy 813 Mains Transformer
  208. Hello all, Im new from Spain, sorry for my english, and problems with my music angel
  209. use 120V x 2 for Aikido octal transformer?
  210. P-P O/P Trafo with only 2 tubes insead of 4?
  211. Eico HF-87 refurb
  212. Which SS CCS for the plate load on a 6N1P?
  213. Um, Can I do this?
  214. Eico power supply trouble (hlp plz)
  215. TV live regulator to tube preamp
  216. How to Spec Headphone output transformers
  217. Can I enlarge the mounting hole on Mosfet?
  218. Meng Yue 6P1
  219. Finding triode curves
  220. Critique my schematic 12ay7 linestage
  221. Suppresor Grid used for Feedback?
  222. Power Cascode
  223. Audio grade components
  224. Line Voltage with Yaqin MC-100B amp
  225. heater warmup and b+ delay
  226. BAL to UNBAL DAC buffer
  227. Counterpoint SA-7 - need a pic of the inside
  228. Are Chinese 6N2 the same as Russian 6N2P?
  229. New project; Musical Machine
  230. 4D32 SE amp, a few more questions
  231. Static shock with simple se
  232. Old electrolytic caps ok? MOSCODE 600
  233. Transformer Flux Band Tips and Tricks?
  234. What tube config will get this sound?
  235. On cleaning transformers
  236. My first project ELEKIT TU-870R
  237. DC7 MkII :New Schade 6080 amp.
  238. current driver tube amplifier
  239. A DC coupled headphones amp
  240. Ebay trader zhangsheng
  241. decware kits worth it?
  242. Simple test for transformer frequency response?
  243. Modular guitar tube amp power supply - interface concerns
  244. Vacuum Tube Voltmeters
  245. Power Trans. Load Test
  246. Replacing Cap Across Filter Cap
  247. Regulate HV preamp with floating LM317?
  248. Rogers cadet 3
  249. AC15 Heritage Project w/ Sound Clips
  250. Output impedance tap considerations.....

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