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  1. Direct from the mains?
  2. PSU capacitors: 30uF film ok instead of 100uF electrolytic?
  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. Luxman 3045 Mono Block Tube Amp
  13. Eye tube for balancing multi amp system
  14. 12ax7 preamp.
  15. External PSU for Quad 22 pre-amplifier
  16. Keep Blowing Fuses
  17. learning tube rectified psu
  18. Series of Diode on HT Plate
  19. Quad II power amps......power output transformers!!!
  20. Mullard (factory) making tubes again
  21. CFB and A2 operation
  22. DIY triode
  23. Interesting symmetrical amp from 1955 magazine
  24. 6N23P, 6S19P anybody knows?
  25. Worlds smallest HiFi valve amp
  26. A DIY Interruptus Moment
  27. Noisy EL84 amp needs new front end
  28. Loosening up magnetic "stiction"
  29. The Return Of Blackburn Mullards?
  30. Can I use different value cap?
  31. tubelab SimpleSe power transformer connection question
  32. need output transformer for Fisher
  33. help for E182CC linestage/driver
  34. User Beware: A Report On Jj Tubes
  35. Depletion mode mosfets for 2mA CCS ?
  36. New tube stash question
  37. Stepped attenuator recommendation...
  38. Pros and cons of Cascoded front ends
  39. EF86 as a volume pot, line pre 2008
  40. RCA voltage regulator
  41. Input voltage attenuation
  42. Valve Buffer amp
  43. 6y6ga
  44. Filmosound L-1 6V6 Volume pot issue
  45. 3C24 in a SE output stage - output transformer impedance recommendation !!!
  46. Another 3f4 spice triode model: 5718 submini triode
  47. hp-8903B advice??
  48. need info on how to convert my bogen k10 for guitars use
  49. Differential Amplfiers - current sources under/over the triodes
  50. Impedance rate VS impedance stability
  51. Anyone running Mikael's SE KT88 in Pentode?
  52. what double triode is less microphonic ?
  53. Need advice on proper use of anode chokes.
  54. Grounding problem?
  55. Current regulation for filament of say a 300B
  56. diagram for OTP 6.6K valve KT88
  57. Dynaco Pas Transformer
  58. Regulated screen supply
  59. Shocked!!!
  60. set el84 tube amp
  61. tube preamp RIAA
  62. 4E27 as a substitution of 845
  63. LS 37 lite audio phono
  64. I want to build an amp!!!
  65. Multimeter test leads?
  66. Choosing proper g2 grid stoppers for SE UL..?
  67. audio note P1SE improvements
  68. Help for choke input regulated PSU
  69. 5687 perveance
  70. Where Can I Pick Up Neutral
  71. Hyperlinear line preamp
  72. What tube to use.
  73. Using mains transformer as output transformer
  74. AutoCAD of tube Packages?
  75. Has Anyone Tried This Before??
  76. More Tube Learning (for me) Cathode followers
  77. weird hum problem
  78. Weird oscillation
  79. Tube stash strategy and testing (long)
  80. Choke loaded LTP
  81. LM Ericsson 2C51 help!
  82. Antek TXs??Any use em???
  83. Speaker impedance questions (SE KT88)
  84. Spud-Assist: Totem-Pole Current-Mirror PP Hybrid
  85. my 6922 / E88CC preamp
  86. For the moderator
  87. 3 amps for HE speakers
  88. Pentode sounds great
  89. Shindo claret
  90. james 6123hs
  91. 6550 Amplifier
  92. ARC Ls 15 Schematic
  93. Super spud-amp?
  94. Basic Oscilloscope Usage Questions
  95. Grounded Cathode phase?
  96. Simple SE, how to wire CFB with outputs for different speaker impedances?
  97. PCB Board designer?
  98. Speaker for your low power tube amp?
  99. Tube collection Database.
  100. E288cc value?
  101. Hi End Tube Project
  102. parallel SE 2A3
  103. Want to build a tube/SS hybrid preamp for HT
  104. Do anyone has schematic for Counterpoint SA3000 ?
  105. Thermistor B+ or primary
  106. Measuring AC at Radio Frequencies
  107. The MingDa MC67-HA meets Frankenstein
  108. What's the biggest full wave damper diode?
  109. Maximising Tube Life
  110. Darling power supply calculations
  111. This is nice - Pix Ongen tube RIAA amp
  112. Tubelab SE 45... Super amp!?
  113. DAC - tube gain stage w/ AC heaters
  114. Microphonics?
  115. Insides of Tango Transformers
  116. Thoughts on horizontal sweep tubes?
  117. 2A3 Design Issues (Long)
  118. Design using EL42 output pentodes
  119. Blumlein's Garter Bias question
  120. Original ECL86 "Baby Huey" thread
  121. Too low heater voltage?
  122. Tube and digital?
  123. 807 monoblocks
  124. What to swap a 6AV6 for?
  125. Pot Noise Help
  126. cathode bias circuit question
  127. ECC40 driver stage for 2A3
  128. heater current and 6922 - 6n6p swap
  129. Tube Crystal Clock Oscillator
  130. Decware Zen Plate Model ZSP1
  131. Battery Power Preamp E188CC review please !
  132. 6sl7
  133. Tube sale at AES
  134. 5v3a
  135. 813 trioded Datasheet and curves
  136. Importance of resistor working voltage spec?
  137. TCJ My-Stock DB
  138. 845 Amp
  139. Ripple filtering help... strange slow rise and fall of voltage
  140. Plate and Filament Transformers
  141. Tentlabs Neg Bias Vs Machmat AFB
  142. Looking for 12AT7/ECC81 phonostage schematic
  143. 6AV5 PP amp Design Review
  144. 6sn7 Preamp power supply
  145. Please: tube kit for <$300?
  146. making a load line
  147. Telefunken Consoles: not just for tube and iron scavenging!
  148. Genalex Gold Lion KT77
  149. driving HD600
  150. Counterpoint SA-3000
  151. Phono stage for 2 7F7s (stereo) plus buffer?
  152. Help and your input on YAQIN MC10L EL34
  153. EL Cheapo Quad amplifier???
  154. Noob questions about a K-12/K-502 kit
  155. 3 quick transformer questions
  156. Push Pull Output tranies for SE amp?
  157. Tube Rectifier Capacitance?
  158. rca 189 b console amps need more info
  159. upgrade transformer?
  160. Parasitic oscillation? (picture)
  161. newbie question : driver/output relationship, input sensitivity
  162. Unknown tube logo
  163. Impedance, the 10x rule, losses & bandwidth
  164. el84/6bq5 PSE
  165. A very odd phase inverter- comments?
  166. Please check my work :)
  167. NOS purchase, should I be concerned?
  168. Strange splitter in the Audio Research D4
  169. 6ak5/5654 plate resistance
  170. Further Troubleshooting Simple SE
  171. What is the purpose of the g2 bypass cap?
  172. questionable 2a3 schematic
  173. overdrive circuit for hammond organs(need help)
  174. A singular experiment with a unheated tube.
  175. Limited bass response in one channel
  176. Show me your fave phonostage circuits.
  177. tube heater voltage, how much is too much?
  178. Para feed choke
  179. Dynaco ST35 power?
  180. Tips/comments for upcoming 300B build
  181. page Eli Duttman's Simple p-p with 5965 MQ EXO-173 and 6AQ5
  182. DHT cathode follower idea
  183. GK71 Output Transformer
  184. Schematics for A.I. Mod 2D
  185. Determing Battery Voltage for cathode bias
  186. OT for audio but still tube
  187. Getting transfer characteristics
  188. Pentodes and Choke Loading
  189. Stepped airgap choke ?
  190. Noob question
  191. SE 300B Integrated Amp: Help choose circuit design
  192. SunAudio 2A3 to 300B
  193. Filament Snubber Cap Explodes! What happened?
  194. Alot of 12AX7's about
  195. DIY tube microphone preamp
  196. Tube tester and PSUD II questions
  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. OpAmp Swap?
  208. Bogen MX-60A- output transformer bandwidth?
  209. 6AS7 Parallel Feed Amp
  210. PSpice model of output transformer
  211. Siemens capacitor
  212. Super 6BG6 vs. 6550
  213. 5687 line stage
  214. Audio Standards
  215. 4 x used 5867A (TB3/750) triodes
  216. 12au7 who has the best ultra low noise ???
  217. Questions about tweaking the Miniblok SET...
  218. The core -sonic reasons
  219. Removing pot from valve pre amp
  220. Power transformer question
  221. Tube construction materials
  222. LTP second grid
  223. How to figure out the bias point of fisher X-100A
  224. Schematic help! (Bell)
  225. Audio Note Soro SE SCHEMATICS
  226. 807 Tube Triode Connected
  227. Would you pls help.
  228. came across this nice 200W tube amp schematic
  229. Anyone seen this amp topology before?
  230. Max. grid resistance
  231. Yaqin mc10l &quot;popping&quot;
  232. Audio Electronics Supply
  233. Alamo Fury 2566
  234. My friends in the USA - tube stores in LA
  235. Can this marraige work?
  236. RJM with 12AY7
  237. Bias winding to power sand
  238. FM Tube radio design
  239. What do you use? Not technical but relative.
  240. looking for a pre-amp schematic
  241. I have waay too many 6DJ8's
  242. Tango NP126
  243. Two 6J5 versus one 6SN7
  244. Bunch of questions regarding plate CCS and some else.
  245. Tube Store in Washington DC (6C33C Triode Buy Where??)
  246. Scott 399 Receiver Schematics?
  247. Need help with 6l6GC choices
  248. Need Hammond/Everett drawings.
  249. 6V6 PP-based Baby Huey/Mullard inspired design needed...
  250. Ecf80

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