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  1. Mixer from pre-amp design
  2. SE Output Tranny - Dumb Question
  3. What Tube for a Differential Amplifier?
  4. Thinking of buying a Lumley Reference ST70 with attached passive pre
  5. Psu
  6. Protection of the Irreplaceable
  7. Trix T621 PA amplifier (British)
  8. Resistor types ??? (carbon or metal film)
  9. First Amp Build
  10. Help ID these little PP output xfrmrs?
  11. Rectifier voltage drop question
  12. dc and ac heater supply in Aikido
  13. Can I obtain a suitable B+ voltage with spare parts?
  14. Multi tap transformers dont use the whole windings?
  15. First layout with spud
  16. EL152, GU50 and EL156
  17. Convert a 110 volt Mcintosh Mc275 to 230volt
  18. transformer maker list
  19. design a preamp, so easy....
  20. SRPP - determining load and balancing
  21. Idea for all C3g phono stage
  22. temp check
  23. Pentode Question
  24. K & K Audio Transformer phase splitter?
  25. Transformer Efficiency
  26. How to test a 6H30 tube
  27. Karaoke Tube Hi-end In The Future
  28. What makes the old McIntosh stuff so good?
  29. Paralell 10M45's for 71A DHT filament?
  30. Rod Coleman CCS/gyrator help
  31. Differential amp.Do they pass 2nd harmonics or reject them?
  32. A half 6sl7 tube
  33. failing tube
  34. Capacitor in series - Resistor across ?
  35. Tube preamp choise...
  36. Some general tube questions from a Tube newbie !!
  37. How unsafe is an Autotransformer?
  38. Can a dual triode use a common cathode resistor?
  39. Dared MC-7P
  40. SRC2496 Miniatube tube output stage
  41. Tubetech smc2b multiband compressor
  42. Tweaking/correction question - Xindak MT-1 balance
  43. HELP! ELNA CERAFINE 500V Caps
  44. Em87/ em84
  45. Pioneer SM-83 restoration
  46. Best GM70 version suited for audio??
  47. PSUDII transformer question
  48. what are these caps doing?
  49. Distortion VS OPT impedence
  50. Heater wiring approaches
  51. Rogers pops, crackle and static are driving me mad!
  52. tube power enough?
  53. Ever notice those scratches on some plates??
  54. JE 45/2A3 SE 2001 edition
  55. Difficult Time Finding Replacement Caps
  56. Mini tube output stage
  57. Mismatched Power Tubes
  58. Eimac 35TG amplifier glows !
  59. ECC88 Shield
  60. One amp channel for mid, the other for tweeter, to SE or to PP, THAT is the Question?
  61. SRRP Output stage. Calculating power output.
  62. bogen chb-35
  63. Rating for resistors in power supply?
  64. Effects of Bias /Ammeters....
  65. pentode mode distortion 6LR8? George?
  66. Info for 6b4g PP
  67. Understanding unregulated PSU
  68. C3m C3g tubes
  69. More ebay craziness
  70. Shunt Capacitor
  71. 6021 Load Line
  72. TubeRiaa - How to calculate the impendance?
  73. Fake Vacuum Tube Amps - Funny but real
  74. 12.6v+ vs 6.3v+/- heater supply
  75. Distortion Measurements
  76. modifying kt88 pp ul amp
  77. Aikido help!
  78. Are Positive Grid Voltage Traces Necessary?
  79. New to Tubes
  80. How to read "Typical Characteristics" curves
  81. 12B4 pre output cap and LF instability
  82. attractive amp kit?
  83. Stereo 7O with transformer phase splitter?
  84. Filter Cap Recommendation
  85. New Guy...With a question...
  86. Interesting wiring guide find, thanks NASA!
  87. marantz 9's OPT data
  88. Why do my amps want signal ground and safety earth connected?
  89. scott 299c
  90. Tube Schematics
  91. JLTi EL34 and KT88 Amplifiers
  92. Radford sta15 looking for a nice preamp...
  93. Really subjective question
  94. Pen-toad Question
  95. Revox Model 40- leave it alone or dig in?
  96. Driver of Sumo Tubes PP for anybody: Shematic and PCB
  97. Output transformer from rowe ammi mm4
  98. Equivalent Circuit?
  99. 300b tube life
  100. CBS tube?
  101. Looking for a 700vdc supply
  102. Are all 9-pin sockets the same?
  103. Problem with short Test
  104. Troubleshooting 12B4/RH84/Akai project
  105. hi-end vacuum tube phono preamplifier
  106. PCB help
  107. QUICK transformer Question HELP
  108. Configuring an AB class amp to work in pure A class
  109. SCott LK-48-B balance pot
  110. lost a tube
  111. Lee Laboratory - model 50 Cruiser
  112. 1/2 of 12AX7 in single envelope?
  113. 2 pairs of 8150's
  114. AX84 Clean Preamp
  115. 8150 Tubes
  116. Capacitor/Choke value in SET buffer supply? (95 vdc B+)
  117. NJ Tube Auction
  118. pentode buffer
  119. Tube Buffer? 12ax7?
  120. What is this tube?
  121. Kits
  122. Power supply high voltage problems with Melos amp.
  123. 811A Class A2 with Power Drive
  124. Help ID this 12AX7/EL84 Console(?) Amp
  125. Eico HF-86
  126. Marantz 9 Filter CHOKE value??
  127. 10M45s: strange behaviour @ 100mA
  128. LtSpice - Russian tube models
  129. Before I buy KT88's
  130. Ultra Low Cost 6P1P Push Pull Schematic,PCB
  131. adding reverb to Bassman circuit
  132. 300B SE amp: One more one
  133. Already found problem with new amp
  134. LtSpice transformer - confusion
  135. OPUS 5.0 A Modern Mullard
  136. EL34 PP New Design of newbie
  137. Tubelabs SE vs. Simple SE ??
  138. Somebody knows about Lorenz e84l?(real Lorenz)
  139. Aikido Heater PSU help
  140. ecc99 with which Interstage Transformer?
  141. Looking for Audio Research Caps
  142. 2A3 SE Problem
  143. One knob tone control
  144. Tube Base Application ?
  145. The no-brainer project, some questions
  146. schematic request Yarland FV34AIII
  147. SY/Pete Millett Crossover
  148. Please don't stone me. . . .
  149. Golden Tube
  150. BH Curve & OPT choices
  151. Scott Transformers
  152. Identifying transformers
  153. Need Help understanding a triode fed LTP.
  154. How to measure and adjust bias
  155. Another cheap tube amp from China
  156. where to add master volume/gain/tone to Bogen L330?
  157. Another Williamson
  158. Weird EL84 PP behavior
  159. 300B SE Design
  160. Tube/Valve Shop in BERLIN
  161. Aikido buffer/gain selector?
  162. Gaijin friendly audio shop in Tokyo area?
  163. Troubleshooting channel dropout
  164. "groundbus" is this right?
  165. About New Production Tubes
  166. suche JJ E88CC oder 6922 Sovtek in Berlin
  167. 8ohm output transformer with a 4ohm load
  168. Power transformer - good for anything?
  169. Beginner question, swap .047uf for .05uf?
  170. Tetra phono stage
  171. Japanese OPTs
  172. Changing secondary voltage (Uncivilized way)
  173. 4EH7 opinions anyone?
  174. Silvertone 45A tubes....rare variant
  175. single 12AT7 in a tubelab simple se
  176. Finished the "big one"!
  177. CV428 or 5B254M useful?
  178. How about making your own tubes?!
  179. entry level int-amp?
  180. What Cap Is This?
  181. help please with kt-88 ultralinear o/p transformer
  182. A flea thingy that sounds good
  183. Mullard vs. Williamson 60W UL PP amp. Which one?
  184. Need help with PSUD II model
  185. 5v to 2.5v for 2a3 filament
  186. Does 2A3 require a grid stopper?
  187. Hammond ECL86/6GW8 conversion
  188. Connecting two opt's to act as one.
  189. Usefullness of tubes
  190. twisted/isolated/shielded wires?
  191. Feedback question
  192. What tubes for a tube amp?
  193. SE-OPTs
  194. Phase splitting using directly heated tubes?
  195. Change EL84 from Triode to Ultra linear
  196. DC hybrid folded-cascode for Schade
  197. New UK Manufacturer of Valves
  198. Can any here explain the JHS designation?
  199. Too good to be true???
  200. Judging a tube's condition
  201. EF86 tube preamp
  202. Any tips for snap in type caps to replace solder lug cans?
  203. 6EM7 SET Headamp
  204. Are these ALL really EL34 subs?
  205. parallel tubes
  206. Changing the frequency of AC from mains to lower, out of audible range???
  207. Se 6550
  208. New Suppo Audio EL34 amp
  209. 60Watt+ valve design wanted
  210. Interesting tube on e-bay for trans atlantic cable
  211. Need help solving problem on new 2A3 build
  212. Tube and Passive Preamps-Auto Transformers for Attenuators/Volume Control - Overview
  213. Peavey Classic 30 - Squeal
  214. Where bay M6 lamination (M4,M2) metal for transformer
  215. dynamic pentode screen draw
  216. Tube Sockets
  217. Circuit Ideas for the 815 (martian tube)
  218. Old Tektronix unit, usefull?
  219. my transformer output has a center tap: what do I do with this?
  220. 6AV5GA amp?
  221. Phase splitter idea
  222. Lowering noise in small signal pentodes?
  223. Articles from the past
  224. tube upgrade for vintage orange 120
  225. Help for LTP/CCS plus cathode follower
  226. Conrad Johnson PV-5, my next project, some simple questions
  227. ALTEC 1566a (DiY...if)
  228. Friday Night Fun with a ST-70
  229. Aikido All-In-One Octal Heater Troubles
  230. Guitar tube amp OT Calculation/Winding HELP!
  231. transimpedance amplifier
  232. Jaehong Lee OTL
  233. What tube bases to support for a new tube curve tracer
  234. 6GE5 in driver service for class B P-P
  235. Replace Electrolytics?
  236. Can OT's couple?
  237. tube solid state hybrid guitar amp, looking for schematic
  238. before i drill Simple SE Chassis Seperation of input and output
  239. gates m-3638 preamp
  240. Oversized caps (PS and coupling) in RH84: Problem?
  241. What makes a great concertina triode?
  242. Luxman SQ5A
  243. Spice model with grid current 12ax7
  244. converting a magnavox pp 6v6 in triode mode
  245. 3-leaded russian PIO caps
  246. 6V6 filaments in series
  247. my loud valve preamp
  248. Tranformer for Chinese pre amp (6N11) ?
  249. 1 watt desk speaker
  250. PE06/40 replacement

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