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  1. LS50/GU50 Both Grid Drive
  2. Aikido filament question
  3. 6l6 Se.
  4. Feedback requested on 7591 PP design
  5. Blackburn Mullard/Philips video
  6. DIY sheilded B+ cable
  7. Experimenters Tube Sockets
  8. Used freebies precipitate questions
  9. Mains toroid as IT with DC balance?
  10. Tubes for Viva Solista 845 SET amp
  11. SE transformer for PP duty?
  12. Warning: new SS relay question / No flame I
  13. Tube Haunts Thread?
  14. Problem with Maida regulator
  15. 2 stage SE IT coupled amps..
  16. BUF420M Current Sink
  17. Direct from the mains?
  18. Annealed silicon core opt`s
  19. Designing a "cheap" highish-power PP amp...
  20. Improvements for the Mikael Abdellah KT88???
  21. DC supply on driver tube hums..
  22. Sun Audio SV-2A3
  23. Mullard Blackburn Tube Factory Tour Video
  24. SE amp: Please suggest a better operating point
  25. Paralleling Outputs or Bi-amp
  26. triple triode common cathode - only want to use 2 triodes
  27. Luxman 3045 Mono Block Tube Amp
  28. Eye tube for balancing multi amp system
  29. 12ax7 preamp.
  30. External PSU for Quad 22 pre-amplifier
  31. Keep Blowing Fuses
  32. learning tube rectified psu
  33. Series of Diode on HT Plate
  34. Quad II power amps......power output transformers!!!
  35. Mullard (factory) making tubes again
  36. CFB and A2 operation
  37. DIY triode
  38. Interesting symmetrical amp from 1955 magazine
  39. 6N23P, 6S19P anybody knows?
  40. Worlds smallest HiFi valve amp
  41. A DIY Interruptus Moment
  42. Noisy EL84 amp needs new front end
  43. Loosening up magnetic "stiction"
  44. The Return Of Blackburn Mullards?
  45. Can I use different value cap?
  46. need output transformer for Fisher
  47. help for E182CC linestage/driver
  48. User Beware: A Report On Jj Tubes
  49. Depletion mode mosfets for 2mA CCS ?
  50. New tube stash question
  51. Stepped attenuator recommendation...
  52. Pros and cons of Cascoded front ends
  53. EF86 as a volume pot, line pre 2008
  54. RCA voltage regulator
  55. Input voltage attenuation
  56. Valve Buffer amp
  57. 6y6ga
  58. Filmosound L-1 6V6 Volume pot issue
  59. 3C24 in a SE output stage - output transformer impedance recommendation !!!
  60. Another 3f4 spice triode model: 5718 submini triode
  61. Differential Amplfiers - current sources under/over the triodes
  62. Impedance rate VS impedance stability
  63. Anyone running Mikael's SE KT88 in Pentode?
  64. what double triode is less microphonic ?
  65. Need advice on proper use of anode chokes.
  66. Grounding problem?
  67. Current regulation for filament of say a 300B
  68. diagram for OTP 6.6K valve KT88
  69. Dynaco Pas Transformer
  70. Regulated screen supply
  71. Shocked!!!
  72. set el84 tube amp
  73. tube preamp RIAA
  74. 4E27 as a substitution of 845
  75. LS 37 lite audio phono
  76. I want to build an amp!!!
  77. Choosing proper g2 grid stoppers for SE UL..?
  78. audio note P1SE improvements
  79. 5687 perveance
  80. Where Can I Pick Up Neutral
  81. Hyperlinear line preamp
  82. What tube to use.
  83. Using mains transformer as output transformer
  84. Has Anyone Tried This Before??
  85. More Tube Learning (for me) Cathode followers
  86. weird hum problem
  87. Weird oscillation
  88. Tube stash strategy and testing (long)
  89. Choke loaded LTP
  90. LM Ericsson 2C51 help!
  91. Antek TXs??Any use em???
  92. Speaker impedance questions (SE KT88)
  93. Spud-Assist: Totem-Pole Current-Mirror PP Hybrid
  94. my 6922 / E88CC preamp
  95. For the moderator
  96. 3 amps for HE speakers
  97. Pentode sounds great
  98. Shindo claret
  99. james 6123hs
  100. 6550 Amplifier
  101. ARC Ls 15 Schematic
  102. Super spud-amp?
  103. Grounded Cathode phase?
  104. Speaker for your low power tube amp?
  105. Tube collection Database.
  106. E288cc value?
  107. Hi End Tube Project
  108. parallel SE 2A3
  109. Want to build a tube/SS hybrid preamp for HT
  110. Do anyone has schematic for Counterpoint SA3000 ?
  111. Thermistor B+ or primary
  112. The MingDa MC67-HA meets Frankenstein
  113. What's the biggest full wave damper diode?
  114. Maximising Tube Life
  115. Darling power supply calculations
  116. This is nice - Pix Ongen tube RIAA amp
  117. DAC - tube gain stage w/ AC heaters
  118. Microphonics?
  119. Insides of Tango Transformers
  120. Thoughts on horizontal sweep tubes?
  121. 2A3 Design Issues (Long)
  122. Design using EL42 output pentodes
  123. Blumlein's Garter Bias question
  124. Original ECL86 "Baby Huey" thread
  125. Too low heater voltage?
  126. Tube and digital?
  127. 807 monoblocks
  128. What to swap a 6AV6 for?
  129. Pot Noise Help
  130. cathode bias circuit question
  131. ECC40 driver stage for 2A3
  132. heater current and 6922 - 6n6p swap
  133. Tube Crystal Clock Oscillator
  134. Decware Zen Plate Model ZSP1
  135. Battery Power Preamp E188CC review please !
  136. 6sl7
  137. Tube sale at AES
  138. 5v3a
  139. 813 trioded Datasheet and curves
  140. TCJ My-Stock DB
  141. 845 Amp
  142. Ripple filtering help... strange slow rise and fall of voltage
  143. Plate and Filament Transformers
  144. Tentlabs Neg Bias Vs Machmat AFB
  145. Looking for 12AT7/ECC81 phonostage schematic
  146. 6AV5 PP amp Design Review
  147. 6sn7 Preamp power supply
  148. Please: tube kit for <$300?
  149. making a load line
  150. Telefunken Consoles: not just for tube and iron scavenging!
  151. Genalex Gold Lion KT77
  152. driving HD600
  153. Counterpoint SA-3000
  154. Phono stage for 2 7F7s (stereo) plus buffer?
  155. Help and your input on YAQIN MC10L EL34
  156. EL Cheapo Quad amplifier???
  157. Noob questions about a K-12/K-502 kit
  158. 3 quick transformer questions
  159. Push Pull Output tranies for SE amp?
  160. Tube Rectifier Capacitance?
  161. rca 189 b console amps need more info
  162. upgrade transformer?
  163. Parasitic oscillation? (picture)
  164. newbie question : driver/output relationship, input sensitivity
  165. Unknown tube logo
  166. Impedance, the 10x rule, losses & bandwidth
  167. el84/6bq5 PSE
  168. A very odd phase inverter- comments?
  169. Please check my work :)
  170. NOS purchase, should I be concerned?
  171. Strange splitter in the Audio Research D4
  172. 6ak5/5654 plate resistance
  173. What is the purpose of the g2 bypass cap?
  174. questionable 2a3 schematic
  175. A singular experiment with a unheated tube.
  176. Limited bass response in one channel
  177. Show me your fave phonostage circuits.
  178. tube heater voltage, how much is too much?
  179. Para feed choke
  180. Dynaco ST35 power?
  181. Tips/comments for upcoming 300B build
  182. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  183. DHT cathode follower idea
  184. GK71 Output Transformer
  185. Schematics for A.I. Mod 2D
  186. Determing Battery Voltage for cathode bias
  187. OT for audio but still tube
  188. Getting transfer characteristics
  189. Pentodes and Choke Loading
  190. Stepped airgap choke ?
  191. Noob question
  192. SE 300B Integrated Amp: Help choose circuit design
  193. SunAudio 2A3 to 300B
  194. Filament Snubber Cap Explodes! What happened?
  195. Alot of 12AX7's about
  196. DIY tube microphone preamp
  197. Wurlitzer/Fisher Amp Musings
  198. please check my work
  199. How to get cathode bias info from grid bias info?
  200. SE 300B Integrated Amp: Transformers
  201. Positive feedback, improperly drawn screen, or WTF?
  202. GE Console RC 7100 A - need some help!
  203. Output tube for 600V B+, 5800 ohm primary PP, tertiary 25% UL taps?
  204. Still tring to find a couple 100uf motor runs
  205. small push-pull amp to preamp
  206. Electraprint EL84 PP with PSA-2N
  207. Bogen MX-60A- output transformer bandwidth?
  208. 6AS7 Parallel Feed Amp
  209. Super 6BG6 vs. 6550
  210. 5687 line stage
  211. Audio Standards
  212. 4 x used 5867A (TB3/750) triodes
  213. 12au7 who has the best ultra low noise ???
  214. Questions about tweaking the Miniblok SET...
  215. The core -sonic reasons
  216. Removing pot from valve pre amp
  217. Power transformer question
  218. Tube construction materials
  219. LTP second grid
  220. How to figure out the bias point of fisher X-100A
  221. Schematic help! (Bell)
  222. Audio Note Soro SE SCHEMATICS
  223. 807 Tube Triode Connected
  224. Would you pls help.
  225. Anyone seen this amp topology before?
  226. Max. grid resistance
  227. Yaqin mc10l &quot;popping&quot;
  228. Audio Electronics Supply
  229. Alamo Fury 2566
  230. My friends in the USA - tube stores in LA
  231. Can this marraige work?
  232. RJM with 12AY7
  233. Bias winding to power sand
  234. FM Tube radio design
  235. What do you use? Not technical but relative.
  236. looking for a pre-amp schematic
  237. I have waay too many 6DJ8's
  238. Tango NP126
  239. Two 6J5 versus one 6SN7
  240. Bunch of questions regarding plate CCS and some else.
  241. Tube Store in Washington DC (6C33C Triode Buy Where??)
  242. Scott 399 Receiver Schematics?
  243. Need help with 6l6GC choices
  244. Need Hammond/Everett drawings.
  245. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  246. Ecf80
  247. Please Explain difference Mono vs Push Pull vs Single End etc
  248. VU Meters
  249. diy preamps, bottlehead, decware....
  250. Power supply choke help needed

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