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  1. Revox Model 40- leave it alone or dig in?
  2. Driver of Sumo Tubes PP for anybody: Shematic and PCB
  3. Output transformer from rowe ammi mm4
  4. Equivalent Circuit?
  5. 300b tube life
  6. CBS tube?
  7. Looking for a 700vdc supply
  8. Are all 9-pin sockets the same?
  9. Problem with short Test
  10. Troubleshooting 12B4/RH84/Akai project
  11. hi-end vacuum tube phono preamplifier
  12. PCB help
  13. QUICK transformer Question HELP
  14. Configuring an AB class amp to work in pure A class
  15. SCott LK-48-B balance pot
  16. lost a tube
  17. Lee Laboratory - model 50 Cruiser
  18. 1/2 of 12AX7 in single envelope?
  19. 2 pairs of 8150's
  20. AX84 Clean Preamp
  21. 8150 Tubes
  22. Capacitor/Choke value in SET buffer supply? (95 vdc B+)
  23. NJ Tube Auction
  24. pentode buffer
  25. Tube Buffer? 12ax7?
  26. What is this tube?
  27. Kits
  28. Power supply high voltage problems with Melos amp.
  29. 811A Class A2 with Power Drive
  30. Help ID this 12AX7/EL84 Console(?) Amp
  31. Eico HF-86
  32. Marantz 9 Filter CHOKE value??
  33. 10M45s: strange behaviour @ 100mA
  34. LtSpice - Russian tube models
  35. Before I buy KT88's
  36. Ultra Low Cost 6P1P Push Pull Schematic,PCB
  37. adding reverb to Bassman circuit
  38. 300B SE amp: One more one
  39. Already found problem with new amp
  40. LtSpice transformer - confusion
  41. OPUS 5.0 A Modern Mullard
  42. EL34 PP New Design of newbie
  43. Tubelabs SE vs. Simple SE ??
  44. Somebody knows about Lorenz e84l?(real Lorenz)
  45. Aikido Heater PSU help
  46. ecc99 with which Interstage Transformer?
  47. Looking for Audio Research Caps
  48. 2A3 SE Problem
  49. One knob tone control
  50. Tube Base Application ?
  51. The no-brainer project, some questions
  52. schematic request Yarland FV34AIII
  53. SY/Pete Millett Crossover
  54. Please don't stone me. . . .
  55. Golden Tube
  56. BH Curve & OPT choices
  57. Scott Transformers
  58. Identifying transformers
  59. Need Help understanding a triode fed LTP.
  60. How to measure and adjust bias
  61. Another cheap tube amp from China
  62. where to add master volume/gain/tone to Bogen L330?
  63. Another Williamson
  64. Weird EL84 PP behavior
  65. 300B SE Design
  66. Tube/Valve Shop in BERLIN
  67. Aikido buffer/gain selector?
  68. Gaijin friendly audio shop in Tokyo area?
  69. Troubleshooting channel dropout
  70. "groundbus" is this right?
  71. About New Production Tubes
  72. suche JJ E88CC oder 6922 Sovtek in Berlin
  73. 8ohm output transformer with a 4ohm load
  74. Power transformer - good for anything?
  75. Beginner question, swap .047uf for .05uf?
  76. Tetra phono stage
  77. Japanese OPTs
  78. Changing secondary voltage (Uncivilized way)
  79. 4EH7 opinions anyone?
  80. Silvertone 45A tubes....rare variant
  81. single 12AT7 in a tubelab simple se
  82. Finished the "big one"!
  83. CV428 or 5B254M useful?
  84. How about making your own tubes?!
  85. entry level int-amp?
  86. What Cap Is This?
  87. help please with kt-88 ultralinear o/p transformer
  88. A flea thingy that sounds good
  89. Mullard vs. Williamson 60W UL PP amp. Which one?
  90. Need help with PSUD II model
  91. 5v to 2.5v for 2a3 filament
  92. Does 2A3 require a grid stopper?
  93. Hammond ECL86/6GW8 conversion
  94. Connecting two opt's to act as one.
  95. Usefullness of tubes
  96. twisted/isolated/shielded wires?
  97. Feedback question
  98. What tubes for a tube amp?
  99. SE-OPTs
  100. Phase splitting using directly heated tubes?
  101. Change EL84 from Triode to Ultra linear
  102. DC hybrid folded-cascode for Schade
  103. New UK Manufacturer of Valves
  104. Can any here explain the JHS designation?
  105. Too good to be true???
  106. Judging a tube's condition
  107. EF86 tube preamp
  108. Any tips for snap in type caps to replace solder lug cans?
  109. 6EM7 SET Headamp
  110. Are these ALL really EL34 subs?
  111. parallel tubes
  112. Changing the frequency of AC from mains to lower, out of audible range???
  113. Se 6550
  114. New Suppo Audio EL34 amp
  115. 60Watt+ valve design wanted
  116. Interesting tube on e-bay for trans atlantic cable
  117. Need help solving problem on new 2A3 build
  118. Tube and Passive Preamps-Auto Transformers for Attenuators/Volume Control - Overview
  119. Peavey Classic 30 - Squeal
  120. Where bay M6 lamination (M4,M2) metal for transformer
  121. dynamic pentode screen draw
  122. Tube Sockets
  123. Circuit Ideas for the 815 (martian tube)
  124. Old Tektronix unit, usefull?
  125. my transformer output has a center tap: what do I do with this?
  126. 6AV5GA amp?
  127. Phase splitter idea
  128. Lowering noise in small signal pentodes?
  129. Articles from the past
  130. tube upgrade for vintage orange 120
  131. Help for LTP/CCS plus cathode follower
  132. Conrad Johnson PV-5, my next project, some simple questions
  133. ALTEC 1566a (DiY...if)
  134. Friday Night Fun with a ST-70
  135. Aikido All-In-One Octal Heater Troubles
  136. Guitar tube amp OT Calculation/Winding HELP!
  137. transimpedance amplifier
  138. Jaehong Lee OTL
  139. What tube bases to support for a new tube curve tracer
  140. 6GE5 in driver service for class B P-P
  141. Replace Electrolytics?
  142. Can OT's couple?
  143. tube solid state hybrid guitar amp, looking for schematic
  144. before i drill Simple SE Chassis Seperation of input and output
  145. gates m-3638 preamp
  146. Oversized caps (PS and coupling) in RH84: Problem?
  147. What makes a great concertina triode?
  148. Luxman SQ5A
  149. Spice model with grid current 12ax7
  150. converting a magnavox pp 6v6 in triode mode
  151. 3-leaded russian PIO caps
  152. 6V6 filaments in series
  153. my loud valve preamp
  154. Tranformer for Chinese pre amp (6N11) ?
  155. 1 watt desk speaker
  156. PE06/40 replacement
  157. Salvaged console tube reciever
  158. EF86 swap for 6BQ5 reverb?
  159. Yaqin CD3 Impressions and Internals
  160. svetlana 6D22S heater issues/question
  161. Unity-Gain EL84 Push-Pull Power Buffer
  162. Tube rectifier input capacitance
  163. Borbely hybrid Tube-MOSFET opamp
  164. Help! Tube Rolling
  165. Articles on Global Feedback
  166. Symetrical out low Zout
  167. Any Rimlock PCB sockets out there?
  168. 12SN7 Round Plate Tung Sol--is there such a thing?
  169. Vintage 2a3 tube amp
  170. Balance in CCS Long Tailed Pairs
  171. Audioromy 813 Mains Transformer
  172. Hello all, Im new from Spain, sorry for my english, and problems with my music angel
  173. use 120V x 2 for Aikido octal transformer?
  174. P-P O/P Trafo with only 2 tubes insead of 4?
  175. Eico HF-87 refurb
  176. Which SS CCS for the plate load on a 6N1P?
  177. Um, Can I do this?
  178. Eico power supply trouble (hlp plz)
  179. TV live regulator to tube preamp
  180. How to Spec Headphone output transformers
  181. Can I enlarge the mounting hole on Mosfet?
  182. Meng Yue 6P1
  183. Finding triode curves
  184. Critique my schematic 12ay7 linestage
  185. Suppresor Grid used for Feedback?
  186. Power Cascode
  187. Audio grade components
  188. Line Voltage with Yaqin MC-100B amp
  189. heater warmup and b+ delay
  190. BAL to UNBAL DAC buffer
  191. Counterpoint SA-7 - need a pic of the inside
  192. Are Chinese 6N2 the same as Russian 6N2P?
  193. New project; Musical Machine
  194. 4D32 SE amp, a few more questions
  195. Static shock with simple se
  196. Old electrolytic caps ok? MOSCODE 600
  197. Transformer Flux Band Tips and Tricks?
  198. What tube config will get this sound?
  199. On cleaning transformers
  200. My first project ELEKIT TU-870R
  201. DC7 MkII :New Schade 6080 amp.
  202. current driver tube amplifier
  203. A DC coupled headphones amp
  204. Ebay trader zhangsheng
  205. decware kits worth it?
  206. Simple test for transformer frequency response?
  207. Modular guitar tube amp power supply - interface concerns
  208. Vacuum Tube Voltmeters
  209. Power Trans. Load Test
  210. Replacing Cap Across Filter Cap
  211. Regulate HV preamp with floating LM317?
  212. Rogers cadet 3
  213. AC15 Heritage Project w/ Sound Clips
  214. Output impedance tap considerations.....
  215. Amp switch safety load
  216. MF X-10D replica problem
  217. Nice triode
  218. Low gain preamplifier
  219. Improving a Maple Tree Audio PS 2 power supply
  220. Baby Huey-ish phono?
  221. New? Local Feedback Method
  222. PSUD Help Needed: What value do I enter for current?
  223. Question on WE310
  224. How do you calculate choke size in a power supply?
  225. tubecad and tubecad se
  226. 300B amp Power Supply
  227. Adjustable internal Resonance?
  228. B+ Voltage sag for AB1 PP
  229. Maplin
  230. Preamp with an integrated amp
  231. First "boot" in 15 years
  232. Inherited these tubes. Anything interesting?
  233. What application for this tube?
  234. tantalum cap
  235. do I need to upgrade my heater supply to add another tube?
  236. Anyone have curves for a 2C52?
  237. tube-amplifier-shaped-usb-speaker
  238. pre-amp tubes: matching and care
  239. How to self taught about building tube amplifiers
  240. Any pretty good/bad chinese amps?
  241. Couple idiot questions....
  242. Looking for the triode mode of Z759
  243. Couple idiot questions....
  244. push pull 45
  245. Video of hum noise when I switch on the reverb of my Twin Amp
  246. 6sj7 spice model
  247. Help finding parallel 45 SE schematic
  248. filling in the low end, 6bq5 12ax7 circuitry
  249. Dynaco Mark VI
  250. Looking for Sonic Frontiers SFS80 Schematic

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