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  1. Aikido Tubes
  2. Recommended tubes for AI Modulus 3A, C-J MV55 and Moscode 300
  3. Schematic Question
  4. EL34 as triode?
  5. Linestage Questions
  6. Help! Building Jax's HFTA
  7. Gobs of AC on ISCO 494
  8. Change step up ratio of input transformer?
  9. LCR RIAA rebuild
  10. common mode choke question
  11. Choosing Choke
  12. Input impedance
  13. Hey Tubelab, Transformer Question
  14. Hybrid Rectifier Check Please !
  15. 1st tube project, tubalizer?
  16. 1st Time project - Report 1
  17. ED-8000 set amp
  18. Hitachi v-202 scope
  19. Cheap and nice looking SE OPT
  20. How much difference 0.22 vs 0.33 cap?
  21. Tubelab SimpleSE
  22. 813 final design?
  23. HPHV regulator, designed by Emile Sprenger
  24. Counterpoint tube amps
  25. SS or tube voltage amplifying stages in an amp with tube output?
  26. 24V Aikido --> 6GM8 with Buffer
  27. Motorboating in Dynaco ST-70
  28. Does such a tube exist?
  29. Noisy PSU?
  30. Bell & Howell amp
  31. Valve Amp with soild state front end
  32. Controlling transient response
  33. Transcendar Budget SE Transformers
  34. Opinion on New Sensor 6SN7GTB?
  35. Determining optimal OT turns ratio
  36. Splitting up the Power Amp
  37. Sowter 5113
  38. Cascoded 6N6P
  39. MachMat or Tentlabs Heater Supply for 300B
  40. Common mode filtering for heater supplies.
  41. Distortion.
  42. 83 rectifier peak repetitive current?
  43. 813 Project has begun !
  44. C3G PX25 DRD - Will it work
  45. 6J5 (Metal Tubes) ....something goes around inside
  46. common-mode chokes
  47. EL-34 and 100k pot
  48. Scott 299 (late) OPT's
  49. Tube magazines
  50. PP plate-choke?
  51. More Phase Splitting Questions
  52. Concertina sanity check
  53. Transformer Specs
  54. The Aikido or Moskido??
  55. KT88 PP suggestion
  56. Ultrapath line amp
  57. Gross loudspeaker cone movement when using tube amps.
  58. Pre-amp power iron advice??
  59. Class A 8417 Amp
  60. DHT output tubes and DC heating
  61. rock music and SE?
  62. Disadvantages of using Zobel and Series notch filter ?
  63. old days source
  64. Mu-follower vs common cathode w/- active load
  65. K40 or K42 Russian PIO: what would you use/recommend?
  66. CCS turning off prematurely?
  67. ESL amp again!
  68. calling Moray James, and others ..wav8 or 6BM8 schemtics--PP.
  69. Does anyone know the output transformer specs of the...
  70. SE EL84 project for my friend
  71. SE amplifier - How much power?
  72. what speakers do you use?
  73. A Tube amp for a Hostille Tube Enviornment
  74. practical choice for an amp
  75. Simple cathode CCS
  76. 2A3s in push pull; class A
  77. 5 VDC heater question
  78. Power transformer snerring.
  79. Subminiature Tube & Tripath Hybrid Integrated
  80. 211
  81. Which of these output tubes?
  82. High Voltage Heater info
  83. 6SL7 in place of a 12AX7?
  84. DHT Tubes
  85. Driving 6AQ5's
  86. schematic wanted
  87. 807s replacing 6L6GCs
  88. Shielded vs twisted pair in internal wiring
  89. tube basics: computing mu and transconductance
  90. Aluminium vs steel chassis
  91. Etf06 & 07
  92. FU 13 tubes
  93. Good Souinding Direct Replacement For 325 / OP 37
  94. how to wire 6.3VDC heater on a heater with center tap (12.6V series, 6.3V parallel)?
  95. The Russian 5U4M is a 5AR4 equivalent ?
  96. WE427A Cold Cathode Diode
  97. reversing polarity in regulated B+ and other question
  98. Anthem Integrated 1
  99. Hickok 800 settings
  100. Advice/Help - Cap upgrade
  101. question on old tube sockets
  102. fisher sa-16 very red tube and?
  103. pros/cons of a 845 VS 211
  104. Preamp Power and Voltage Output
  105. Anyone seen these 6L6GCs before?
  106. online transformer info for newbies
  107. High voltage pseudo-triode
  108. Yes, again: mains-powered KILLER amp without a power transformer.
  109. Quicksilver 300b monoblock (KT88 conversion)
  110. Output transformer (SE) - DIY
  111. is Gary Pimm still around?
  112. carbon composition - 2 types
  113. Input attenuation on Leak amp
  114. 101D Sockets
  115. PC86, '88 RF Amplifiers
  116. Jolida SJ-302A tube swap
  117. Inductance for tweeter OPT
  118. Help me.......What is the 6SN7 ???????
  119. high DCR secondary (power transformer)
  120. Transformer power formula Help???
  121. 2A3 OTL 800 Ohm Speaker
  122. Trying to find specs on transformer core material
  123. 12AX7 suggestions?
  124. power supply (cap input)
  125. is it safe to connect these secondaries in series?
  126. Peter Millett's Uniamp with KT88
  127. Mystery transformer
  128. Can I phase split like this?
  129. How to model psud2 using tube regulator?
  130. Choke-loaded 6C33C stage
  131. EL84 as both driver and output stage.
  132. Silvertone (Sears) stereo amp
  133. Chasing hum in a new tube amp
  134. Zenith K731 AM/FM radio audio random cracking sound in FM mode
  135. 6bx7gt Se Amp
  136. Beard P100 Bias Lights
  137. Metasonix TS-21 modulator
  138. help with diyparadiso schematics
  139. electrostatic shield - nice to have or recommended or doesn't matter?
  140. Simple method for 240V from 240V line
  141. Audiophile bibliophilia nervosa
  142. Help with amp layout
  143. Why triode Mk3 is louder than stock Mk3
  144. Seduction or Cornet for phono???
  145. Please review my 6AQ5 Amp
  146. 832A PP Amp LTP
  147. Checklist to observe before applying the mains
  148. C3g driving 2a3: Triode or pentode?
  149. psud2 question and Fi Primer's 211 circuit
  150. Jolida JD-301A & Jadis DPL
  151. Headphones with a Tube Amp
  152. 6S3B-V Wire-Ended Single-Triode tube
  153. Anode stoppers
  154. Weird Quad II mains transformer help
  155. Mullard 5-20 parts list
  156. has anyone DIYed a Citation 2?
  157. Bogen/plexi conversion question
  158. Matched pair - different brands
  159. ERIC Mod 3460P Restore
  160. PV12 Preamplifier
  161. Grandma's old Capitol Console
  162. Music Angel
  163. What is the version of 45
  164. Aikido for guitar?
  165. Heathkit potted power transformer question
  166. Thermionic Cooling?
  167. What have the finest sound, the PX4 or the 45 ?
  168. value of a cap between driver tube and output tubes
  169. do matched pair (or maybe a quad) output tubes "aged" at the same rate?
  170. Mini EL84 Amp Done
  171. Overcoming Miller
  172. Heathkit Schematic model AA-50 needed
  173. Help me choose please
  174. Mono Class A SE Schematics
  175. Irish DIY Meet.
  176. Sizing PP OPT
  177. 6BQ5/EL90 guitar amp schematics wanted
  178. Do SE transfomers get hot?
  179. Aikido Questions
  180. LTP with interstage trafo
  181. 6BQ5 Push-Pull amplifier
  182. Amplifier input
  183. C#@$ quality 6L6EH's
  184. Mains toroids appear to be great for audio
  185. High bias point.
  186. ebay amp
  187. GU 50 output modification
  188. 6C41Cs Class-A PP
  189. My First Big Amp
  190. sv572-10
  191. Stupid PAS-2 Pot Questions
  192. Old electronics articles
  193. UL Feedback
  194. who know fd23 and fd422 tubes?
  195. Laptop amplifier
  196. Thoughts Of Modifying My First Tube Amp.
  197. Quick question for Eli Duttman (or others!)
  198. Blackened GZ32 glass envelopes
  199. Are these vintage vacuum tubes suitable.....
  200. Tube XP8109-02?!
  201. peak current 300B heater with start up
  202. Microphonic phono preamplifier
  203. Pentode Plate Load
  204. what monoblocks to build?
  205. All tube direct box
  206. max b+ for 6V6
  207. What speakers to go with tubes ??
  208. Bluenote Koala Tube CD Player
  209. OPTs and power for bi-amping
  210. Quick And Dirty ~75W Guitar Amp
  211. Old Diodes
  212. Father, I abused my Leak S/20
  213. 6688/E180F line stage?
  214. Variable feedback to enhance damping factor at low frequency
  215. Need assistance with picking the right Edcor audio transformer
  216. Critique my first design
  217. Biamping, phase of output?
  218. Ground star
  219. op-points for 27 pre...?
  220. Opinions/Experience of Toroidal valve amps
  221. hum, no way to get rid of it
  222. How to adjust my circuit for frequency response?
  223. Input Tubes?
  224. 6BG6 = 6L6GC with top cap - cheap!
  225. Maida Regulators Redux
  226. ground of DC bias supply
  227. does anyone the website for yaqin/mr. liung/music angel amps?
  228. plate load ccs ala gary p question
  229. Books for newbe
  230. 6AS7 OTL
  231. n00b phono preamp troubleshooting..
  232. TubelabSE - Anyone built?
  233. any example of SE designs using GM70?
  234. Shunt regulator question
  235. Any RH807 builders?
  236. Replacing multi-section caps with multiple caps?
  237. Recycle an Eico HFT-90 for a preamp
  238. EL84 PP output transformer for 6L6 PP class A
  239. Jensen PIO capacitor burn in
  240. toroid psu, weird results...
  241. Squeaky Noise in ARC Dual 75
  242. EL84 mod questions
  243. Measuring DC at preamp output
  244. Is Northern Electric the NEW W.E.?
  245. Burnt Woodside STA35 valve amp... Help!
  246. My tube preamplifier project
  247. Ponderings on hybrid 300B
  248. Maida Regulator Parts
  249. anyone familiar with the 211/vt4c circuit from Fi Primer?
  250. Calculating operating points of two DC stages

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