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  1. PSU id and help (psu designer ii)
  2. The all DHT SET Headphone Amp
  3. Assistance with rectifiers in PSUD
  4. Music Angel XD 500 MkII Bias setting
  5. Magnoval
  6. S.E.X. amp plate chokes replacements
  7. Ampex 600 Questions
  8. Antek out of business until April
  9. SE EL34 in triode schematic
  10. Sylvania Console?
  11. Can output transfomers be pick and mixed?
  12. i have just notice that my yaqin 2100 vk bias settings is all over the place.
  13. Preamp Design Review Request
  14. Red Plate Of Doom
  15. LED cathode bias noise issue
  16. PCL86 se amplif.
  17. Is This a good Amplier?
  18. Question: Class AB Hybrid with small signal triode and Power Mosfet output?
  19. Contemporary Transformer for Doubler
  20. The volume pot - The hidden villain of preamp
  21. Heathkit EUW-15 Univ. Power Supply (Tube)
  22. diamond cathode tubes
  23. 6146B
  24. ef86 based preamp
  25. 12FQ7 Why and will it be shortage?
  26. Trouble w/ Maida regulator bias supply
  27. impedance calculations
  28. calibrate stark 8-77?
  29. EZLoad Dummy Load
  30. Best kit for a rookie tube builder
  31. schematic question? 805 feedback
  32. 6av5ga distortion spectrum
  33. Single stage line with anode-cathode feedback
  34. VNAV' SUMO Contest 2011
  35. Direct heated triode (dht) cathode bypass: different options
  36. choice of driver for RS 241
  37. Wiring up 3 6.3 Volt Heaters to a 12V supply
  38. Adding LED's to my tubes4hifi sp6 preamp
  39. Stripped down HK A-300
  40. Westrex 2332A amplifiers
  41. Leak st20
  42. Where could I find these sockets???
  43. Hammond L-112
  44. 4-pin tube socket spring clips
  45. Quad FM1 tuner, could be in wrong section
  46. My first tube amp and speaker build I'm loven it
  47. 211 IT amp, battery vs fixed bias
  48. 300B Tube Failure
  49. how to see if a Mullard 12ax7 reissue is long or short plate
  50. Can capacitors, how do they fail?
  51. Long Preamp to Power Amp Cable Lengths
  52. My time at Hovland - HP-100 Lore
  53. hybrid quad design
  54. TooB NooB: Options?
  55. Preamp grounding
  56. Express PCB and POV-ray
  57. Looking for circuit of SE amp. for 4D32
  58. 865 tetrode in triode mode...WOW !
  59. MP-2A preamp
  60. Is a 7 watt per channel amp enough
  61. Help: Interstage Transformer for 7788 (E810F) Tube in Triode ?
  62. Transformers
  63. Pentode curves for GU 50 SE amp with 700V B+
  64. Valve op-amp pre ?
  65. Use only half of OPT secondary?
  66. On/Off cycling
  67. Tube operating points help
  68. OTL Heater Questions
  69. tube output question
  70. RIAA LCR Mythos
  71. first tube amp
  72. M135 retubing and eventual modification
  73. Taylor 211 vs. GE 211
  74. regulated
  75. What should I do with these eico hf-12's?
  76. Dynaco mk3 clone hum issue
  77. First DIY project, which SE tube amp should I build?
  78. 6n11 tube headphone amp
  79. Kt88 Pin alignement problem=did a mistake
  80. LTspice Frustration...help, please..
  81. Bias mods
  82. Maida tracking preregulator?
  83. 230 VAC to 2*140 VAC transformer - 20VA
  84. Re gettering?
  85. Distortion rise on OPT
  86. How to build a transconductance tester for small driver tubes?
  87. Musical Fidelity X-10D Cap Mod
  88. 6N3 & 6E2 tubes.
  89. help with local nfb
  90. What should I build
  91. leak st20
  92. Wright Audio WPA 3.5 Humpot & schematics
  93. the old light bulb trick
  94. Dynaco ST70 KIT - your opinion please
  95. Wire for tubes using a plate cap?
  96. Lundahl LL1660 OPT Franks 6SN7 linestage
  97. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
  98. Tomiko 10k PP transformer?
  99. Powerdrive for higher grid wattage A2 transmitter tubes
  100. Marantz Model 5 Amps and Model Seven Preamp
  101. How to calculate output transformers
  102. Grounding considerations with external PS
  103. Cathodyne fet buffered balanced line out
  104. 807pp + input phase splitter
  105. leak st 20
  106. Does anyone know what this is!..???
  107. Thought Exercise: Submini Circlotron OTL Amp
  108. Preamp Grounding PCB
  109. Manley 440: Tubes red cherry after replacing old tubes with new ones
  110. EL95 Parallel Push Pull design
  111. What is the ideal low-noise heater power for high-power output tubes?
  112. Beijing 6N6T
  113. Tube recomedations for my first tube amp
  114. Tube Load Lines and B+
  115. Hybrid rectifier possible in PSUD?
  116. Bias voltage slower to come up
  117. Can You Reccommend a 6922 tube?
  118. Miniblok Resistor Parameter Modulation using Pots
  119. gm70 driver tube tests
  120. 300B Globe physical dimensions
  121. DIY Fisher 800b into a mic pre
  122. OPT Modification Question-Help please?
  123. Cant find origin
  124. Fixing Sneaky Oscillation in P-P Amplifiers
  125. fu-29 Audioromy
  126. Almarro A205A as experimentation platform
  127. Thoughts on layout and potential for improvements
  128. What is the difference between "rectifier tubes" and "power tubes"
  129. EL84/UL84 single valve amp
  130. Mic preamp - strange high frequency roll off problem
  131. Tissbury audio
  132. midification to srpp preamplifier input voltage
  133. DHT SE amp with ultrapath
  134. Tube mic preamp problem
  135. Output transformer: reasons for destruction?
  136. Bewitch KT88
  137. SE OPT Wiring
  138. Budget 300b tubes recommendations
  139. Hum problem through one channel
  140. Audio Research LS22 DIY
  141. 300V Tube Power Supply From 120VAC Without Rectifier?
  142. NOS Tube: Black Spot on Getter Flashing? Help
  143. FET Source Follower Distortion
  144. TUBE/MOSFET/BJT hibrid amp
  145. PYE Black Box amplifier
  146. what OPT for 211 parallel SE amp?
  147. Opinions for 6550 bias.
  148. 832A as a Single Ended Tetrode Amp?
  149. DCPP - "Engineer's Amplifier" : Need a bit of help
  150. quicky rebuild 6v6 to 807
  151. Old fire bottles.
  152. Regulated Power Supply using 6550
  153. GU50 SE vs 300B SE tube amp??
  154. Help with voltages
  155. New to valves & this forum.
  156. new amp 2a3 pp
  157. Telefunken EL153 SE circuity
  158. RH 84 Variation: Direct Coupled Pentode
  159. Single Transformer, two valve rectifiers
  160. Capacitors for Radio Frequency Amlifier and Converter Oscillator Tubes
  161. Tube Screening Cans
  162. PSU grounding
  163. 6AX4GT TV damper
  164. plate on chinese 6L6 red on one side
  165. FM stereo decoder
  166. Under the Christmas Tree - Valve Amplifiers 4th Ed.
  167. Using those dern 1625 tubes: a simple SEP amplifier
  168. Pairs of resistors in opposite directions
  169. 45 spice model
  170. APEX 460 Tube mic modification
  171. EL84 and 6BQ5 are Same?
  172. Simple hybrid amplifier (35W/8Ohm)
  173. Yaqin mc 10l or qinpu 6000 mkii
  174. Reported attack site?
  175. LCR RIAA Phono with DHTs
  176. New Here -Would Like to Build
  177. 12E1 push pull poweramp
  178. marantz model 9
  179. I would appreciate some helpfull advice from Aikido builders
  180. Dynaco ST70 big Snorting noise.
  181. Good Soft Distortion
  182. magnavox 8301 revamp, need's a second look
  183. Circuit or schematic for current source of 7.5mA
  184. Sakuma's bleeder tubes and series connected transfomers
  185. Tube measurement
  186. adding tone control to SE 6v6 amp
  187. Easy Little 6L6 SE
  188. knight KA-55
  189. Hum in tube amp
  190. Lundahl LL1660 10 mA Alt V
  191. 12au7 valve preamp (again?)
  192. Simple DC heating question
  193. 6146B?
  194. Reduce gain on power amp?
  195. ES9023 DAC(subbu) + Tube Preamp with Remote and R2R volume control(Danzup)
  196. AC heaters question
  197. Anyone tried this Mcintosh c22 knock off.
  198. Help me to find pins for tube socket
  199. HT delay pcb...
  200. Power supply, heater questions...
  201. Heathkit AA-151, to separate pre-amp advise needed?
  202. grounding
  203. 2 Stage GM-70 amp in A2... possible?
  204. GlassWare Janus Shunt Rectifier Tube Swap
  205. Schematics
  206. SE 6B4G driver tube options?
  207. seeking datasheet of 6J2B-V in english
  208. Nailing Hum in my Phono Stage
  209. Shaving voltage off HV supply?
  210. LEAK T12 and POINT ONE - worth having ?
  211. Quicksilvers Mid Mono Schematic?
  212. Russian & East European Tube Factory Logos
  213. Lampizator Channel
  214. RIAA triode or pentode
  215. Cute Little Tube Oscilloscope, Thought I'd share.
  216. Is it really possible to deliver 2W into 40 ohms with an SET ?
  217. se
  218. Connecting Two Amps to Common Input
  219. Wiring Aikido using LSA/HPA switch
  220. Most exotic SET power amplifier
  221. Help with rogers cadet 3 integrated
  222. Opamps for servos in tube amps - Christmas gift from LT, 12-12-12!
  223. tube amp hum........normal or suggested fix?
  224. Building a beast: Stereo EL84 auto bias PP tube amp
  225. Becker Brescia auto radio
  226. Double feedback pentode Power Stage
  227. Anyone Using Guiguang 300b tubes?
  228. Where to get Audio Note Gaku-On service manual?
  229. Sanity Check - Input Transformer Overshoot
  230. TOA HA-355 vintage tube PA amp schematic
  231. EL34 PushPull UL Amp
  232. 6L6G emission too high
  233. Need help designing BIAS circuit for old Bell amp
  234. Heathkit A-5A 6L6 PP Integrated Amp
  235. Where to put the meter
  236. Radii GS-40pp
  237. Concept dilemma (pre/pwr/spud content)
  238. What to do with these Eimac tubes?
  239. Driving 211 with VT25 or EL34?
  240. DIY AMP start project - Help choosing one
  241. Pilot 248B Amp with weak channel
  242. 6H30 VA stage?
  243. What is the best way to connect DC filaments?
  244. suggestions for a parallel feed 45 amp?
  245. Counterpoint SA 5.1 repairs
  246. The Morgan Jones mini tube headphone Amplifier
  247. Borbely headphone amp
  248. Found An Amplifier In My Basement I'd Forgotten About & Learn It's Sought After
  249. Floating OPT oscilloscope measuraments
  250. I Wasn't Away That Long, What's WIth The Price Hikes On All My Old Toys?

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