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  1. Antek out of business until April
  2. SE EL34 in triode schematic
  3. Sylvania Console?
  4. Can output transfomers be pick and mixed?
  5. i have just notice that my yaqin 2100 vk bias settings is all over the place.
  6. Preamp Design Review Request
  7. Red Plate Of Doom
  8. LED cathode bias noise issue
  9. PCL86 se amplif.
  10. Is This a good Amplier?
  11. Question: Class AB Hybrid with small signal triode and Power Mosfet output?
  12. Contemporary Transformer for Doubler
  13. The volume pot - The hidden villain of preamp
  14. Heathkit EUW-15 Univ. Power Supply (Tube)
  15. diamond cathode tubes
  16. 6146B
  17. ef86 based preamp
  18. 12FQ7 Why and will it be shortage?
  19. Trouble w/ Maida regulator bias supply
  20. impedance calculations
  21. calibrate stark 8-77?
  22. EZLoad Dummy Load
  23. Best kit for a rookie tube builder
  24. schematic question? 805 feedback
  25. 6av5ga distortion spectrum
  26. Single stage line with anode-cathode feedback
  27. VNAV' SUMO Contest 2011
  28. Direct heated triode (dht) cathode bypass: different options
  29. choice of driver for RS 241
  30. Wiring up 3 6.3 Volt Heaters to a 12V supply
  31. Adding LED's to my tubes4hifi sp6 preamp
  32. Stripped down HK A-300
  33. Westrex 2332A amplifiers
  34. Leak st20
  35. Where could I find these sockets???
  36. Hammond L-112
  37. 4-pin tube socket spring clips
  38. Quad FM1 tuner, could be in wrong section
  39. My first tube amp and speaker build I'm loven it
  40. 211 IT amp, battery vs fixed bias
  41. 300B Tube Failure
  42. how to see if a Mullard 12ax7 reissue is long or short plate
  43. Can capacitors, how do they fail?
  44. Long Preamp to Power Amp Cable Lengths
  45. My time at Hovland - HP-100 Lore
  46. hybrid quad design
  47. TooB NooB: Options?
  48. Preamp grounding
  49. Express PCB and POV-ray
  50. Looking for circuit of SE amp. for 4D32
  51. 865 tetrode in triode mode...WOW !
  52. MP-2A preamp
  53. Is a 7 watt per channel amp enough
  54. Help: Interstage Transformer for 7788 (E810F) Tube in Triode ?
  55. Transformers
  56. Pentode curves for GU 50 SE amp with 700V B+
  57. Valve op-amp pre ?
  58. Use only half of OPT secondary?
  59. On/Off cycling
  60. Tube operating points help
  61. OTL Heater Questions
  62. tube output question
  63. RIAA LCR Mythos
  64. first tube amp
  65. M135 retubing and eventual modification
  66. Taylor 211 vs. GE 211
  67. regulated
  68. What should I do with these eico hf-12's?
  69. Dynaco mk3 clone hum issue
  70. First DIY project, which SE tube amp should I build?
  71. 6n11 tube headphone amp
  72. Kt88 Pin alignement problem=did a mistake
  73. LTspice Frustration...help, please..
  74. Bias mods
  75. Maida tracking preregulator?
  76. 230 VAC to 2*140 VAC transformer - 20VA
  77. Re gettering?
  78. Distortion rise on OPT
  79. How to build a transconductance tester for small driver tubes?
  80. Musical Fidelity X-10D Cap Mod
  81. 6N3 & 6E2 tubes.
  82. help with local nfb
  83. What should I build
  84. leak st20
  85. Wright Audio WPA 3.5 Humpot & schematics
  86. the old light bulb trick
  87. Dynaco ST70 KIT - your opinion please
  88. Wire for tubes using a plate cap?
  89. Lundahl LL1660 OPT Franks 6SN7 linestage
  90. GU-50 PP + 10k:16-8-4 Ohm ,20w OPT..what is the best to do?
  91. Tomiko 10k PP transformer?
  92. Powerdrive for higher grid wattage A2 transmitter tubes
  93. Marantz Model 5 Amps and Model Seven Preamp
  94. How to calculate output transformers
  95. Grounding considerations with external PS
  96. Cathodyne fet buffered balanced line out
  97. 807pp + input phase splitter
  98. leak st 20
  99. Questions about Champ mods, NF loop and more
  100. Does anyone know what this is!..???
  101. Thought Exercise: Submini Circlotron OTL Amp
  102. Preamp Grounding PCB
  103. Manley 440: Tubes red cherry after replacing old tubes with new ones
  104. EL95 Parallel Push Pull design
  105. What is the ideal low-noise heater power for high-power output tubes?
  106. Beijing 6N6T
  107. Tube recomedations for my first tube amp
  108. Tube Load Lines and B+
  109. Hybrid rectifier possible in PSUD?
  110. Hickok calibration
  111. Bias voltage slower to come up
  112. Can You Reccommend a 6922 tube?
  113. Miniblok Resistor Parameter Modulation using Pots
  114. gm70 driver tube tests
  115. 300B Globe physical dimensions
  116. DIY Fisher 800b into a mic pre
  117. OPT Modification Question-Help please?
  118. Cant find origin
  119. Fixing Sneaky Oscillation in P-P Amplifiers
  120. fu-29 Audioromy
  121. Almarro A205A as experimentation platform
  122. Thoughts on layout and potential for improvements
  123. What is the difference between "rectifier tubes" and "power tubes"
  124. uTracer...
  125. EL84/UL84 single valve amp
  126. Mic preamp - strange high frequency roll off problem
  127. Tissbury audio
  128. midification to srpp preamplifier input voltage
  129. DHT SE amp with ultrapath
  130. Tube mic preamp problem
  131. Output transformer: reasons for destruction?
  132. Bewitch KT88
  133. SE OPT Wiring
  134. maggie 185 to stereo guitar amp?
  135. Budget 300b tubes recommendations
  136. Hum problem through one channel
  137. Audio Research LS22 DIY
  138. 300V Tube Power Supply From 120VAC Without Rectifier?
  139. NOS Tube: Black Spot on Getter Flashing? Help
  140. FET Source Follower Distortion
  141. TUBE/MOSFET/BJT hibrid amp
  142. PYE Black Box amplifier
  143. Tube tester
  144. what OPT for 211 parallel SE amp?
  145. Opinions for 6550 bias.
  146. 832A as a Single Ended Tetrode Amp?
  147. DCPP - "Engineer's Amplifier" : Need a bit of help
  148. quicky rebuild 6v6 to 807
  149. Old fire bottles.
  150. Regulated Power Supply using 6550
  151. GU50 SE vs 300B SE tube amp??
  152. Help with voltages
  153. New to valves & this forum.
  154. new amp 2a3 pp
  155. Telefunken EL153 SE circuity
  156. RH 84 Variation: Direct Coupled Pentode
  157. Single Transformer, two valve rectifiers
  158. Capacitors for Radio Frequency Amlifier and Converter Oscillator Tubes
  159. Tube Screening Cans
  160. PSU grounding
  161. 6AX4GT TV damper
  162. plate on chinese 6L6 red on one side
  163. FM stereo decoder
  164. Under the Christmas Tree - Valve Amplifiers 4th Ed.
  165. Using those dern 1625 tubes: a simple SEP amplifier
  166. Pairs of resistors in opposite directions
  167. 45 spice model
  168. APEX 460 Tube mic modification
  169. EL84 and 6BQ5 are Same?
  170. Simple hybrid amplifier (35W/8Ohm)
  171. Yaqin mc 10l or qinpu 6000 mkii
  172. Reported attack site?
  173. LCR RIAA Phono with DHTs
  174. New Here -Would Like to Build
  175. 12E1 push pull poweramp
  176. marantz model 9
  177. I would appreciate some helpfull advice from Aikido builders
  178. Dynaco ST70 big Snorting noise.
  179. Good Soft Distortion
  180. magnavox 8301 revamp, need's a second look
  181. Circuit or schematic for current source of 7.5mA
  182. Sakuma's bleeder tubes and series connected transfomers
  183. Tube measurement
  184. adding tone control to SE 6v6 amp
  185. Easy Little 6L6 SE
  186. knight KA-55
  187. Hum in tube amp
  188. Lundahl LL1660 10 mA Alt V
  189. 12au7 valve preamp (again?)
  190. Simple DC heating question
  191. 6146B?
  192. Reduce gain on power amp?
  193. ES9023 DAC(subbu) + Tube Preamp with Remote and R2R volume control(Danzup)
  194. AC heaters question
  195. Anyone tried this Mcintosh c22 knock off.
  196. Help me to find pins for tube socket
  197. HT delay pcb...
  198. Power supply, heater questions...
  199. Heathkit AA-151, to separate pre-amp advise needed?
  200. grounding
  201. 2 Stage GM-70 amp in A2... possible?
  202. GlassWare Janus Shunt Rectifier Tube Swap
  203. Schematics
  204. SE 6B4G driver tube options?
  205. seeking datasheet of 6J2B-V in english
  206. Nailing Hum in my Phono Stage
  207. Shaving voltage off HV supply?
  208. LEAK T12 and POINT ONE - worth having ?
  209. Quicksilvers Mid Mono Schematic?
  210. Russian & East European Tube Factory Logos
  211. Lampizator Channel
  212. RIAA triode or pentode
  213. Cute Little Tube Oscilloscope, Thought I'd share.
  214. Is it really possible to deliver 2W into 40 ohms with an SET ?
  215. se
  216. Connecting Two Amps to Common Input
  217. Wiring Aikido using LSA/HPA switch
  218. Most exotic SET power amplifier
  219. Help with rogers cadet 3 integrated
  220. Opamps for servos in tube amps - Christmas gift from LT, 12-12-12!
  221. tube amp hum........normal or suggested fix?
  222. Building a beast: Stereo EL84 auto bias PP tube amp
  223. Becker Brescia auto radio
  224. Double feedback pentode Power Stage
  225. Anyone Using Guiguang 300b tubes?
  226. Where to get Audio Note Gaku-On service manual?
  227. Sanity Check - Input Transformer Overshoot
  228. TOA HA-355 vintage tube PA amp schematic
  229. EL34 PushPull UL Amp
  230. 6L6G emission too high
  231. Need help designing BIAS circuit for old Bell amp
  232. Heathkit A-5A 6L6 PP Integrated Amp
  233. Where to put the meter
  234. Radii GS-40pp
  235. Concept dilemma (pre/pwr/spud content)
  236. What to do with these Eimac tubes?
  237. Driving 211 with VT25 or EL34?
  238. DIY AMP start project - Help choosing one
  239. Pilot 248B Amp with weak channel
  240. 6H30 VA stage?
  241. What is the best way to connect DC filaments?
  242. suggestions for a parallel feed 45 amp?
  243. Counterpoint SA 5.1 repairs
  244. The Morgan Jones mini tube headphone Amplifier
  245. Borbely headphone amp
  246. Found An Amplifier In My Basement I'd Forgotten About & Learn It's Sought After
  247. Floating OPT oscilloscope measuraments
  248. I Wasn't Away That Long, What's WIth The Price Hikes On All My Old Toys?
  249. Channel voltage mismatch
  250. OS70/1750 datasheets

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