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  1. Interesting wiring guide find, thanks NASA!
  2. marantz 9's OPT data
  3. Why do my amps want signal ground and safety earth connected?
  4. scott 299c
  5. Tube Schematics
  6. JLTi EL34 and KT88 Amplifiers
  7. Radford sta15 looking for a nice preamp...
  8. Really subjective question
  9. Pen-toad Question
  10. Revox Model 40- leave it alone or dig in?
  11. Driver of Sumo Tubes PP for anybody: Shematic and PCB
  12. Output transformer from rowe ammi mm4
  13. Equivalent Circuit?
  14. 300b tube life
  15. CBS tube?
  16. Looking for a 700vdc supply
  17. Are all 9-pin sockets the same?
  18. Problem with short Test
  19. Troubleshooting 12B4/RH84/Akai project
  20. hi-end vacuum tube phono preamplifier
  21. PCB help
  22. QUICK transformer Question HELP
  23. Configuring an AB class amp to work in pure A class
  24. SCott LK-48-B balance pot
  25. lost a tube
  26. Lee Laboratory - model 50 Cruiser
  27. 1/2 of 12AX7 in single envelope?
  28. 2 pairs of 8150's
  29. AX84 Clean Preamp
  30. 8150 Tubes
  31. Capacitor/Choke value in SET buffer supply? (95 vdc B+)
  32. NJ Tube Auction
  33. pentode buffer
  34. Tube Buffer? 12ax7?
  35. What is this tube?
  36. Kits
  37. Power supply high voltage problems with Melos amp.
  38. 811A Class A2 with Power Drive
  39. Help ID this 12AX7/EL84 Console(?) Amp
  40. Eico HF-86
  41. Marantz 9 Filter CHOKE value??
  42. 10M45s: strange behaviour @ 100mA
  43. LtSpice - Russian tube models
  44. Before I buy KT88's
  45. Ultra Low Cost 6P1P Push Pull Schematic,PCB
  46. adding reverb to Bassman circuit
  47. 300B SE amp: One more one
  48. Already found problem with new amp
  49. LtSpice transformer - confusion
  50. OPUS 5.0 A Modern Mullard
  51. EL34 PP New Design of newbie
  52. Tubelabs SE vs. Simple SE ??
  53. Somebody knows about Lorenz e84l?(real Lorenz)
  54. Aikido Heater PSU help
  55. ecc99 with which Interstage Transformer?
  56. Looking for Audio Research Caps
  57. 2A3 SE Problem
  58. One knob tone control
  59. Tube Base Application ?
  60. The no-brainer project, some questions
  61. schematic request Yarland FV34AIII
  62. SY/Pete Millett Crossover
  63. Please don't stone me. . . .
  64. Golden Tube
  65. BH Curve & OPT choices
  66. Scott Transformers
  67. Identifying transformers
  68. Need Help understanding a triode fed LTP.
  69. How to measure and adjust bias
  70. Another cheap tube amp from China
  71. where to add master volume/gain/tone to Bogen L330?
  72. Another Williamson
  73. Weird EL84 PP behavior
  74. 300B SE Design
  75. Tube/Valve Shop in BERLIN
  76. Aikido buffer/gain selector?
  77. Gaijin friendly audio shop in Tokyo area?
  78. Troubleshooting channel dropout
  79. "groundbus" is this right?
  80. About New Production Tubes
  81. suche JJ E88CC oder 6922 Sovtek in Berlin
  82. 8ohm output transformer with a 4ohm load
  83. Power transformer - good for anything?
  84. Beginner question, swap .047uf for .05uf?
  85. Tetra phono stage
  86. Japanese OPTs
  87. Changing secondary voltage (Uncivilized way)
  88. 4EH7 opinions anyone?
  89. Silvertone 45A tubes....rare variant
  90. single 12AT7 in a tubelab simple se
  91. Finished the "big one"!
  92. CV428 or 5B254M useful?
  93. How about making your own tubes?!
  94. entry level int-amp?
  95. What Cap Is This?
  96. help please with kt-88 ultralinear o/p transformer
  97. A flea thingy that sounds good
  98. Mullard vs. Williamson 60W UL PP amp. Which one?
  99. Need help with PSUD II model
  100. 5v to 2.5v for 2a3 filament
  101. Does 2A3 require a grid stopper?
  102. Hammond ECL86/6GW8 conversion
  103. Connecting two opt's to act as one.
  104. Usefullness of tubes
  105. twisted/isolated/shielded wires?
  106. Feedback question
  107. What tubes for a tube amp?
  108. SE-OPTs
  109. Phase splitting using directly heated tubes?
  110. Change EL84 from Triode to Ultra linear
  111. DC hybrid folded-cascode for Schade
  112. New UK Manufacturer of Valves
  113. Can any here explain the JHS designation?
  114. Too good to be true???
  115. Judging a tube's condition
  116. EF86 tube preamp
  117. Any tips for snap in type caps to replace solder lug cans?
  118. 6EM7 SET Headamp
  119. Are these ALL really EL34 subs?
  120. parallel tubes
  121. Changing the frequency of AC from mains to lower, out of audible range???
  122. Se 6550
  123. New Suppo Audio EL34 amp
  124. 60Watt+ valve design wanted
  125. Interesting tube on e-bay for trans atlantic cable
  126. Need help solving problem on new 2A3 build
  127. Tube and Passive Preamps-Auto Transformers for Attenuators/Volume Control - Overview
  128. Peavey Classic 30 - Squeal
  129. Where bay M6 lamination (M4,M2) metal for transformer
  130. dynamic pentode screen draw
  131. Tube Sockets
  132. Circuit Ideas for the 815 (martian tube)
  133. Old Tektronix unit, usefull?
  134. my transformer output has a center tap: what do I do with this?
  135. 6AV5GA amp?
  136. Phase splitter idea
  137. Lowering noise in small signal pentodes?
  138. Articles from the past
  139. tube upgrade for vintage orange 120
  140. Help for LTP/CCS plus cathode follower
  141. Conrad Johnson PV-5, my next project, some simple questions
  142. ALTEC 1566a (DiY...if)
  143. Friday Night Fun with a ST-70
  144. Aikido All-In-One Octal Heater Troubles
  145. Guitar tube amp OT Calculation/Winding HELP!
  146. transimpedance amplifier
  147. Jaehong Lee OTL
  148. What tube bases to support for a new tube curve tracer
  149. 6GE5 in driver service for class B P-P
  150. Replace Electrolytics?
  151. Can OT's couple?
  152. tube solid state hybrid guitar amp, looking for schematic
  153. before i drill Simple SE Chassis Seperation of input and output
  154. gates m-3638 preamp
  155. Oversized caps (PS and coupling) in RH84: Problem?
  156. What makes a great concertina triode?
  157. Luxman SQ5A
  158. Spice model with grid current 12ax7
  159. converting a magnavox pp 6v6 in triode mode
  160. 3-leaded russian PIO caps
  161. 6V6 filaments in series
  162. my loud valve preamp
  163. Tranformer for Chinese pre amp (6N11) ?
  164. 1 watt desk speaker
  165. PE06/40 replacement
  166. Salvaged console tube reciever
  167. EF86 swap for 6BQ5 reverb?
  168. Yaqin CD3 Impressions and Internals
  169. svetlana 6D22S heater issues/question
  170. Unity-Gain EL84 Push-Pull Power Buffer
  171. Tube rectifier input capacitance
  172. Borbely hybrid Tube-MOSFET opamp
  173. Help! Tube Rolling
  174. Articles on Global Feedback
  175. Symetrical out low Zout
  176. Any Rimlock PCB sockets out there?
  177. 12SN7 Round Plate Tung Sol--is there such a thing?
  178. Vintage 2a3 tube amp
  179. Balance in CCS Long Tailed Pairs
  180. Audioromy 813 Mains Transformer
  181. Hello all, Im new from Spain, sorry for my english, and problems with my music angel
  182. use 120V x 2 for Aikido octal transformer?
  183. P-P O/P Trafo with only 2 tubes insead of 4?
  184. Eico HF-87 refurb
  185. Which SS CCS for the plate load on a 6N1P?
  186. Um, Can I do this?
  187. Eico power supply trouble (hlp plz)
  188. TV live regulator to tube preamp
  189. How to Spec Headphone output transformers
  190. Can I enlarge the mounting hole on Mosfet?
  191. Meng Yue 6P1
  192. Finding triode curves
  193. Critique my schematic 12ay7 linestage
  194. Suppresor Grid used for Feedback?
  195. Power Cascode
  196. Audio grade components
  197. Line Voltage with Yaqin MC-100B amp
  198. heater warmup and b+ delay
  199. BAL to UNBAL DAC buffer
  200. Counterpoint SA-7 - need a pic of the inside
  201. Are Chinese 6N2 the same as Russian 6N2P?
  202. New project; Musical Machine
  203. 4D32 SE amp, a few more questions
  204. Static shock with simple se
  205. Old electrolytic caps ok? MOSCODE 600
  206. Transformer Flux Band Tips and Tricks?
  207. What tube config will get this sound?
  208. On cleaning transformers
  209. My first project ELEKIT TU-870R
  210. DC7 MkII :New Schade 6080 amp.
  211. current driver tube amplifier
  212. A DC coupled headphones amp
  213. Ebay trader zhangsheng
  214. decware kits worth it?
  215. Simple test for transformer frequency response?
  216. Modular guitar tube amp power supply - interface concerns
  217. Vacuum Tube Voltmeters
  218. Power Trans. Load Test
  219. Replacing Cap Across Filter Cap
  220. Regulate HV preamp with floating LM317?
  221. Rogers cadet 3
  222. AC15 Heritage Project w/ Sound Clips
  223. Output impedance tap considerations.....
  224. Amp switch safety load
  225. MF X-10D replica problem
  226. Nice triode
  227. Low gain preamplifier
  228. Improving a Maple Tree Audio PS 2 power supply
  229. Baby Huey-ish phono?
  230. New? Local Feedback Method
  231. PSUD Help Needed: What value do I enter for current?
  232. Question on WE310
  233. How do you calculate choke size in a power supply?
  234. tubecad and tubecad se
  235. 300B amp Power Supply
  236. Adjustable internal Resonance?
  237. B+ Voltage sag for AB1 PP
  238. Maplin
  239. Preamp with an integrated amp
  240. First "boot" in 15 years
  241. Inherited these tubes. Anything interesting?
  242. What application for this tube?
  243. tantalum cap
  244. do I need to upgrade my heater supply to add another tube?
  245. Anyone have curves for a 2C52?
  246. tube-amplifier-shaped-usb-speaker
  247. pre-amp tubes: matching and care
  248. How to self taught about building tube amplifiers
  249. Any pretty good/bad chinese amps?
  250. Couple idiot questions....

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