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  1. 4-pin tube socket spring clips
  2. Quad FM1 tuner, could be in wrong section
  3. My first tube amp and speaker build I'm loven it
  4. 211 IT amp, battery vs fixed bias
  5. 300B Tube Failure
  6. how to see if a Mullard 12ax7 reissue is long or short plate
  7. Can capacitors, how do they fail?
  8. Long Preamp to Power Amp Cable Lengths
  9. My time at Hovland - HP-100 Lore
  10. hybrid quad design
  11. TooB NooB: Options?
  12. Preamp grounding
  13. Express PCB and POV-ray
  14. Looking for circuit of SE amp. for 4D32
  15. 865 tetrode in triode mode...WOW !
  16. MP-2A preamp
  17. Is a 7 watt per channel amp enough
  18. Help: Interstage Transformer for 7788 (E810F) Tube in Triode ?
  19. Transformers
  20. Pentode curves for GU 50 SE amp with 700V B+
  21. Valve op-amp pre ?
  22. Use only half of OPT secondary?
  23. On/Off cycling
  24. Tube operating points help
  25. OTL Heater Questions
  26. tube output question
  27. RIAA LCR Mythos
  28. first tube amp
  29. M135 retubing and eventual modification
  30. Taylor 211 vs. GE 211
  31. regulated
  32. What should I do with these eico hf-12's?
  33. Dynaco mk3 clone hum issue
  34. First DIY project, which SE tube amp should I build?
  35. 6n11 tube headphone amp
  36. Kt88 Pin alignement problem=did a mistake
  37. LTspice Frustration...help, please..
  38. Bias mods
  39. Maida tracking preregulator?
  40. 230 VAC to 2*140 VAC transformer - 20VA
  41. Re gettering?
  42. Distortion rise on OPT
  43. How to build a transconductance tester for small driver tubes?
  44. Musical Fidelity X-10D Cap Mod
  45. 6N3 & 6E2 tubes.
  46. help with local nfb
  47. What should I build
  48. leak st20
  49. Wright Audio WPA 3.5 Humpot & schematics
  50. the old light bulb trick
  51. Dynaco ST70 KIT - your opinion please
  52. Wire for tubes using a plate cap?
  53. Lundahl LL1660 OPT Franks 6SN7 linestage
  54. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
  55. Tomiko 10k PP transformer?
  56. Powerdrive for higher grid wattage A2 transmitter tubes
  57. Marantz Model 5 Amps and Model Seven Preamp
  58. How to calculate output transformers
  59. Grounding considerations with external PS
  60. Cathodyne fet buffered balanced line out
  61. 807pp + input phase splitter
  62. leak st 20
  63. Questions about Champ mods, NF loop and more
  64. Does anyone know what this is!..???
  65. Thought Exercise: Submini Circlotron OTL Amp
  66. Preamp Grounding PCB
  67. Manley 440: Tubes red cherry after replacing old tubes with new ones
  68. EL95 Parallel Push Pull design
  69. What is the ideal low-noise heater power for high-power output tubes?
  70. Beijing 6N6T
  71. Tube recomedations for my first tube amp
  72. Tube Load Lines and B+
  73. Hybrid rectifier possible in PSUD?
  74. Hickok calibration
  75. Bias voltage slower to come up
  76. Can You Reccommend a 6922 tube?
  77. Miniblok Resistor Parameter Modulation using Pots
  78. gm70 driver tube tests
  79. 300B Globe physical dimensions
  80. DIY Fisher 800b into a mic pre
  81. OPT Modification Question-Help please?
  82. Cant find origin
  83. Fixing Sneaky Oscillation in P-P Amplifiers
  84. fu-29 Audioromy
  85. Almarro A205A as experimentation platform
  86. Thoughts on layout and potential for improvements
  87. What is the difference between "rectifier tubes" and "power tubes"
  88. uTracer...
  89. EL84/UL84 single valve amp
  90. Mic preamp - strange high frequency roll off problem
  91. Tissbury audio
  92. midification to srpp preamplifier input voltage
  93. DHT SE amp with ultrapath
  94. Tube mic preamp problem
  95. Output transformer: reasons for destruction?
  96. Bewitch KT88
  97. SE OPT Wiring
  98. maggie 185 to stereo guitar amp?
  99. Budget 300b tubes recommendations
  100. Hum problem through one channel
  101. Audio Research LS22 DIY
  102. 300V Tube Power Supply From 120VAC Without Rectifier?
  103. NOS Tube: Black Spot on Getter Flashing? Help
  104. FET Source Follower Distortion
  105. TUBE/MOSFET/BJT hibrid amp
  106. PYE Black Box amplifier
  107. Tube tester
  108. what OPT for 211 parallel SE amp?
  109. Opinions for 6550 bias.
  110. 832A as a Single Ended Tetrode Amp?
  111. DCPP - "Engineer's Amplifier" : Need a bit of help
  112. quicky rebuild 6v6 to 807
  113. Old fire bottles.
  114. Regulated Power Supply using 6550
  115. GU50 SE vs 300B SE tube amp??
  116. Help with voltages
  117. New to valves & this forum.
  118. new amp 2a3 pp
  119. Telefunken EL153 SE circuity
  120. RH 84 Variation: Direct Coupled Pentode
  121. Single Transformer, two valve rectifiers
  122. Capacitors for Radio Frequency Amlifier and Converter Oscillator Tubes
  123. Tube Screening Cans
  124. PSU grounding
  125. 6AX4GT TV damper
  126. plate on chinese 6L6 red on one side
  127. FM stereo decoder
  128. Under the Christmas Tree - Valve Amplifiers 4th Ed.
  129. Using those dern 1625 tubes: a simple SEP amplifier
  130. Pairs of resistors in opposite directions
  131. 45 spice model
  132. APEX 460 Tube mic modification
  133. EL84 and 6BQ5 are Same?
  134. Simple hybrid amplifier (35W/8Ohm)
  135. Yaqin mc 10l or qinpu 6000 mkii
  136. Reported attack site?
  137. LCR RIAA Phono with DHTs
  138. New Here -Would Like to Build
  139. 12E1 push pull poweramp
  140. marantz model 9
  141. I would appreciate some helpfull advice from Aikido builders
  142. Dynaco ST70 big Snorting noise.
  143. Good Soft Distortion
  144. magnavox 8301 revamp, need's a second look
  145. Circuit or schematic for current source of 7.5mA
  146. Sakuma's bleeder tubes and series connected transfomers
  147. Tube measurement
  148. adding tone control to SE 6v6 amp
  149. Easy Little 6L6 SE
  150. knight KA-55
  151. Hum in tube amp
  152. Lundahl LL1660 10 mA Alt V
  153. 12au7 valve preamp (again?)
  154. Simple DC heating question
  155. 6146B?
  156. Reduce gain on power amp?
  157. ES9023 DAC(subbu) + Tube Preamp with Remote and R2R volume control(Danzup)
  158. AC heaters question
  159. Anyone tried this Mcintosh c22 knock off.
  160. Help me to find pins for tube socket
  161. HT delay pcb...
  162. Power supply, heater questions...
  163. Heathkit AA-151, to separate pre-amp advise needed?
  164. grounding
  165. 2 Stage GM-70 amp in A2... possible?
  166. GlassWare Janus Shunt Rectifier Tube Swap
  167. Schematics
  168. SE 6B4G driver tube options?
  169. seeking datasheet of 6J2B-V in english
  170. Nailing Hum in my Phono Stage
  171. Shaving voltage off HV supply?
  172. LEAK T12 and POINT ONE - worth having ?
  173. Quicksilvers Mid Mono Schematic?
  174. Russian & East European Tube Factory Logos
  175. Lampizator Channel
  176. RIAA triode or pentode
  177. Cute Little Tube Oscilloscope, Thought I'd share.
  178. Is it really possible to deliver 2W into 40 ohms with an SET ?
  179. se
  180. Connecting Two Amps to Common Input
  181. Wiring Aikido using LSA/HPA switch
  182. Most exotic SET power amplifier
  183. Help with rogers cadet 3 integrated
  184. Opamps for servos in tube amps - Christmas gift from LT, 12-12-12!
  185. tube amp hum........normal or suggested fix?
  186. Building a beast: Stereo EL84 auto bias PP tube amp
  187. Becker Brescia auto radio
  188. Double feedback pentode Power Stage
  189. Anyone Using Guiguang 300b tubes?
  190. Where to get Audio Note Gaku-On service manual?
  191. Sanity Check - Input Transformer Overshoot
  192. TOA HA-355 vintage tube PA amp schematic
  193. EL34 PushPull UL Amp
  194. 6L6G emission too high
  195. Need help designing BIAS circuit for old Bell amp
  196. Heathkit A-5A 6L6 PP Integrated Amp
  197. Where to put the meter
  198. Radii GS-40pp
  199. Concept dilemma (pre/pwr/spud content)
  200. What to do with these Eimac tubes?
  201. Driving 211 with VT25 or EL34?
  202. DIY AMP start project - Help choosing one
  203. Pilot 248B Amp with weak channel
  204. 6H30 VA stage?
  205. What is the best way to connect DC filaments?
  206. suggestions for a parallel feed 45 amp?
  207. Counterpoint SA 5.1 repairs
  208. The Morgan Jones mini tube headphone Amplifier
  209. Borbely headphone amp
  210. Found An Amplifier In My Basement I'd Forgotten About & Learn It's Sought After
  211. Floating OPT oscilloscope measuraments
  212. I Wasn't Away That Long, What's WIth The Price Hikes On All My Old Toys?
  213. Channel voltage mismatch
  214. OS70/1750 datasheets
  215. Beautiful Chassis
  216. 6A4, 46 and 47...excellent sound tubes !!!!
  217. Is it Overkill to use Duelund Caps in Power Stage (Counterpoint SA-5.1)
  218. Quicksilver M135 Schematic?
  219. recognize this old amp?
  220. grey fogging inside 6sn7
  221. Point to point or pcb?
  222. Quad query
  223. Fixing a Velleman K4040 - Buzz HIss Crackle Blown Tubes
  224. Found Original Genalex 12AX7..Need Advice..
  225. OPT power rating and amplifier power
  226. 6BG6-GA
  227. EL84 driving EL84 SET with fixed bias
  228. P2P 6CG7 Input Buffer
  229. 865 in triode mode...anyone ever tried it?
  230. PP KT88 Amp Low frequency Ringing
  231. World audio designs kel34
  232. Glassware Audio Design
  233. 2A3 mounted horizontally
  234. from tube amp to fm reciever
  235. diy tube amp
  236. Cary 805ae xlr option
  237. ST-70 mono makeover
  238. breaking in audio capacitors
  239. Question about 6V6GT amp schematic
  240. Sherwood Schematic
  241. Ever hear of a D7L1 or D7L3 YR7 tube?
  242. Psvane Replica RCA 2A3 tube - WR2A3
  243. 845 Driver Circuit
  244. ADJUSTABLE BIAS MOD KIT
  245. Gold Lion B749 12au7 Thoughts?
  246. Siliconray SRK 09 tube amp kit help
  247. Quantum minstrel
  248. Does anyone know how John Lee Hooker recorded this? (1949)
  249. Please Identify these black capacitors.
  250. New Tubes too silent (6P15P)

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