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  1. BUF420M Current Sink
  2. Direct from the mains?
  3. Annealed silicon core opt`s
  4. Designing a "cheap" highish-power PP amp...
  5. Improvements for the Mikael Abdellah KT88???
  6. DC supply on driver tube hums..
  7. Sun Audio SV-2A3
  8. Mullard Blackburn Tube Factory Tour Video
  9. SE amp: Please suggest a better operating point
  10. Paralleling Outputs or Bi-amp
  11. triple triode common cathode - only want to use 2 triodes
  12. Eye tube for balancing multi amp system
  13. 12ax7 preamp.
  14. External PSU for Quad 22 pre-amplifier
  15. Keep Blowing Fuses
  16. learning tube rectified psu
  17. Series of Diode on HT Plate
  18. Quad II power amps......power output transformers!!!
  19. Mullard (factory) making tubes again
  20. CFB and A2 operation
  21. DIY triode
  22. Interesting symmetrical amp from 1955 magazine
  23. 6N23P, 6S19P anybody knows?
  24. Worlds smallest HiFi valve amp
  25. A DIY Interruptus Moment
  26. Noisy EL84 amp needs new front end
  27. Loosening up magnetic "stiction"
  28. The Return Of Blackburn Mullards?
  29. Can I use different value cap?
  30. need output transformer for Fisher
  31. help for E182CC linestage/driver
  32. User Beware: A Report On Jj Tubes
  33. Depletion mode mosfets for 2mA CCS ?
  34. New tube stash question
  35. Stepped attenuator recommendation...
  36. Pros and cons of Cascoded front ends
  37. EF86 as a volume pot, line pre 2008
  38. RCA voltage regulator
  39. Input voltage attenuation
  40. Valve Buffer amp
  41. 6y6ga
  42. Filmosound L-1 6V6 Volume pot issue
  43. 3C24 in a SE output stage - output transformer impedance recommendation !!!
  44. Another 3f4 spice triode model: 5718 submini triode
  45. Differential Amplfiers - current sources under/over the triodes
  46. Impedance rate VS impedance stability
  47. Anyone running Mikael's SE KT88 in Pentode?
  48. what double triode is less microphonic ?
  49. Need advice on proper use of anode chokes.
  50. Grounding problem?
  51. Current regulation for filament of say a 300B
  52. diagram for OTP 6.6K valve KT88
  53. Dynaco Pas Transformer
  54. Regulated screen supply
  55. Shocked!!!
  56. set el84 tube amp
  57. tube preamp RIAA
  58. 4E27 as a substitution of 845
  59. LS 37 lite audio phono
  60. I want to build an amp!!!
  61. Choosing proper g2 grid stoppers for SE UL..?
  62. audio note P1SE improvements
  63. 5687 perveance
  64. Where Can I Pick Up Neutral
  65. Hyperlinear line preamp
  66. What tube to use.
  67. Using mains transformer as output transformer
  68. Has Anyone Tried This Before??
  69. More Tube Learning (for me) Cathode followers
  70. weird hum problem
  71. Weird oscillation
  72. Tube stash strategy and testing (long)
  73. Choke loaded LTP
  74. LM Ericsson 2C51 help!
  75. Antek TXs??Any use em???
  76. Speaker impedance questions (SE KT88)
  77. Spud-Assist: Totem-Pole Current-Mirror PP Hybrid
  78. my 6922 / E88CC preamp
  79. For the moderator
  80. 3 amps for HE speakers
  81. Pentode sounds great
  82. Shindo claret
  83. james 6123hs
  84. 6550 Amplifier
  85. ARC Ls 15 Schematic
  86. Super spud-amp?
  87. Grounded Cathode phase?
  88. Speaker for your low power tube amp?
  89. Tube collection Database.
  90. E288cc value?
  91. Hi End Tube Project
  92. parallel SE 2A3
  93. Want to build a tube/SS hybrid preamp for HT
  94. Do anyone has schematic for Counterpoint SA3000 ?
  95. Thermistor B+ or primary
  96. The MingDa MC67-HA meets Frankenstein
  97. What's the biggest full wave damper diode?
  98. Maximising Tube Life
  99. Darling power supply calculations
  100. This is nice - Pix Ongen tube RIAA amp
  101. DAC - tube gain stage w/ AC heaters
  102. Microphonics?
  103. Insides of Tango Transformers
  104. Thoughts on horizontal sweep tubes?
  105. 2A3 Design Issues (Long)
  106. Design using EL42 output pentodes
  107. Blumlein's Garter Bias question
  108. Original ECL86 "Baby Huey" thread
  109. Too low heater voltage?
  110. Tube and digital?
  111. 807 monoblocks
  112. What to swap a 6AV6 for?
  113. Pot Noise Help
  114. cathode bias circuit question
  115. ECC40 driver stage for 2A3
  116. heater current and 6922 - 6n6p swap
  117. Decware Zen Plate Model ZSP1
  118. Battery Power Preamp E188CC review please !
  119. 6sl7
  120. Tube sale at AES
  121. 5v3a
  122. 813 trioded Datasheet and curves
  123. TCJ My-Stock DB
  124. 845 Amp
  125. Ripple filtering help... strange slow rise and fall of voltage
  126. Plate and Filament Transformers
  127. Tentlabs Neg Bias Vs Machmat AFB
  128. Looking for 12AT7/ECC81 phonostage schematic
  129. 6AV5 PP amp Design Review
  130. 6sn7 Preamp power supply
  131. Please: tube kit for <$300?
  132. making a load line
  133. Telefunken Consoles: not just for tube and iron scavenging!
  134. Genalex Gold Lion KT77
  135. driving HD600
  136. Counterpoint SA-3000
  137. Phono stage for 2 7F7s (stereo) plus buffer?
  138. Help and your input on YAQIN MC10L EL34
  139. EL Cheapo Quad amplifier???
  140. Noob questions about a K-12/K-502 kit
  141. 3 quick transformer questions
  142. Push Pull Output tranies for SE amp?
  143. Tube Rectifier Capacitance?
  144. rca 189 b console amps need more info
  145. upgrade transformer?
  146. Parasitic oscillation? (picture)
  147. newbie question : driver/output relationship, input sensitivity
  148. Unknown tube logo
  149. Impedance, the 10x rule, losses & bandwidth
  150. el84/6bq5 PSE
  151. A very odd phase inverter- comments?
  152. Please check my work :)
  153. NOS purchase, should I be concerned?
  154. Strange splitter in the Audio Research D4
  155. 6ak5/5654 plate resistance
  156. What is the purpose of the g2 bypass cap?
  157. questionable 2a3 schematic
  158. A singular experiment with a unheated tube.
  159. Limited bass response in one channel
  160. Show me your fave phonostage circuits.
  161. tube heater voltage, how much is too much?
  162. Para feed choke
  163. Dynaco ST35 power?
  164. Tips/comments for upcoming 300B build
  165. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  166. DHT cathode follower idea
  167. GK71 Output Transformer
  168. Schematics for A.I. Mod 2D
  169. Determing Battery Voltage for cathode bias
  170. OT for audio but still tube
  171. Getting transfer characteristics
  172. Pentodes and Choke Loading
  173. Stepped airgap choke ?
  174. Noob question
  175. SE 300B Integrated Amp: Help choose circuit design
  176. SunAudio 2A3 to 300B
  177. Filament Snubber Cap Explodes! What happened?
  178. Alot of 12AX7's about
  179. DIY tube microphone preamp
  180. Wurlitzer/Fisher Amp Musings
  181. please check my work
  182. How to get cathode bias info from grid bias info?
  183. SE 300B Integrated Amp: Transformers
  184. Positive feedback, improperly drawn screen, or WTF?
  185. GE Console RC 7100 A - need some help!
  186. Output tube for 600V B+, 5800 ohm primary PP, tertiary 25% UL taps?
  187. Still tring to find a couple 100uf motor runs
  188. small push-pull amp to preamp
  189. Electraprint EL84 PP with PSA-2N
  190. Bogen MX-60A- output transformer bandwidth?
  191. 6AS7 Parallel Feed Amp
  192. Super 6BG6 vs. 6550
  193. 5687 line stage
  194. Audio Standards
  195. 4 x used 5867A (TB3/750) triodes
  196. 12au7 who has the best ultra low noise ???
  197. Questions about tweaking the Miniblok SET...
  198. The core -sonic reasons
  199. Removing pot from valve pre amp
  200. Power transformer question
  201. Tube construction materials
  202. LTP second grid
  203. How to figure out the bias point of fisher X-100A
  204. Schematic help! (Bell)
  205. Audio Note Soro SE SCHEMATICS
  206. 807 Tube Triode Connected
  207. Would you pls help.
  208. Anyone seen this amp topology before?
  209. Max. grid resistance
  210. Yaqin mc10l &quot;popping&quot;
  211. Audio Electronics Supply
  212. Alamo Fury 2566
  213. My friends in the USA - tube stores in LA
  214. Can this marraige work?
  215. RJM with 12AY7
  216. Bias winding to power sand
  217. FM Tube radio design
  218. What do you use? Not technical but relative.
  219. looking for a pre-amp schematic
  220. I have waay too many 6DJ8's
  221. Tango NP126
  222. Two 6J5 versus one 6SN7
  223. Bunch of questions regarding plate CCS and some else.
  224. Tube Store in Washington DC (6C33C Triode Buy Where??)
  225. Scott 399 Receiver Schematics?
  226. Need help with 6l6GC choices
  227. Need Hammond/Everett drawings.
  228. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  229. Ecf80
  230. Please Explain difference Mono vs Push Pull vs Single End etc
  231. VU Meters
  232. diy preamps, bottlehead, decware....
  233. Power supply choke help needed
  234. LED cathode biasing in push-pull input stage
  235. applying fixed bias to cathode followers
  236. Battieries for B+
  237. Put amp in chassis, then, right channel doesn't work!
  238. hammond transformers?
  239. Two Rectifiers, One transformer
  240. Tubes currently in production
  241. Rachel's Corner - Shuguang
  242. Small 50C5 Amp improvements
  243. Low voltage pentode?
  244. TX distortion
  245. DIY U-L curves
  246. Transformer spacing
  247. Covers for budget output transformers
  248. Correct for bipolar voltage doubler?
  249. Source for 100uf motor run cap.
  250. magnavox 185aa with 4-6v6

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