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  1. 5687 as a single stage SE amp
  2. Changing two stereo amps into two monos
  3. UL Feedback Tap Calculation
  4. Precision Test Equipment tube tester
  5. Octal pentode sub for ef86?
  6. Help with guitar amp sound
  7. to mach1: tubecad regulator using tl431
  8. Thermal management: it this not really of concern?
  9. Signal phase shift through a tube amp
  10. Common-mode EI PS Chokes
  11. Signal pentode in current production
  12. Pentode vs Ultralinear
  13. Bogen CHA33/CHA33Y
  14. Sheet Metal Gauge
  15. Help with 6N6p
  16. Can anyone help, identifing selenium bridge hookup please.
  17. E182CC substitution ?
  18. Face Plate Printing and Silk Screening
  19. Funky reading 12B4A?
  20. Sovtek 5Y3 Issues
  21. from lilliput to gargantua (just for fun)
  22. Formula for calculating HT voltage?
  23. DIY Headamp for Sennheiser-650?
  24. Nuera Tube Amps
  25. Amplifier identification
  26. Perfect tube regulator
  27. Value of grid leak resistor
  28. Comments on this circuit
  29. Just grabbed this AF mesuring equipement, Any infos before restauration is Welcome
  30. Heater current monitoring...
  31. on-off switch position in PSU
  32. A better LDO heater regulator
  33. Guitar Head Amp Schematic
  34. any feedback on Russian gas regulators like SG4S and etc.?
  35. Some cathode follower questions
  36. rectifier voltage drop
  37. Anyone please explain"What is an A1,A2 in SE amp?
  38. Interesting link for guitar amps
  39. What is the correct plate voltage in this circuit?
  40. Any1 have an Osmond PCB library for tubes?
  41. best type cap for preamp PSU
  42. Steve Bench PP loadlines
  43. single Diode power supply?
  44. Spice Error
  45. Anyone have a Welborne Labs amp?
  46. Please help out a Noobie...
  47. wellborne labs
  48. best schematic designer for tubes?
  49. hum in 1 channel
  50. B+ time delay relay
  51. something is wrong with the shunt regulator
  52. Suggestions for a high end tube amp kit
  53. Conrad Johnson PV 7 problem
  54. Math to calc optimal voltage of tube dac to match amp input sensitivity?
  55. Power supply dilemma
  56. Transformer Placement 5E3
  57. Please help: no sound and blown fuse
  58. sparking Output transformer In Webcor 14x240 Amp
  59. Designing my very first tube amp...
  60. Diode bridge for Valve Buffered GC
  61. 6S41S (6C41C) Amplifier
  62. audio research sp11 upgrade help please
  63. The good, the bad, and the ugly OTL amplifiers
  64. Z2b tube rectifier
  65. Sparks inside GZ34
  66. Help with EV4417 6cm5/EL36
  67. Guitar Amps, Overdrive Pedals, and Space Charged Tubes
  68. My Cornet2 Tube Phono Preamp
  69. bright switch to bias circuit?
  70. Regulated AC...thought some of you might be interested
  71. Aikido PSU - integrated or standalone???
  72. Frank Philipse's tube site
  73. World' smallest GM-70 set
  74. Question on output hum on tube amp?
  75. Aikido Preamp
  76. Argh!!
  77. EL84 bias point
  78. Coupling cap rating
  79. Regulated power supply
  80. outstanding book??
  81. when the datasheet says "vertical mounting: up or down", does it mean...
  82. half wave rectifier will not saturate transformer core?
  83. Did I get in over my head too soon?!?
  84. Parallel output tubes
  85. Dropping filament volts/ L-W ramblings
  86. Rogers Cadet III Power problem ?
  87. about bi-cap
  88. HOT Iron ?
  89. how to set current in G Pimm's latest self-biasing CCS circuit?
  90. Low pass active tube crossover
  91. Ecological recycling amplifier (6CU6)
  92. Need ECF80 / 6BL8 tube spice 3f4 model
  93. Capacitor above chassis
  94. PS Help
  95. Bogen-Stein! mx60a mx-60a mo100a mo-100a
  96. Transmitter tubes
  97. Power Supply Construction
  98. what are the advantages of double core output transformers vs EI ?
  99. What is a reasonable amount ripple voltage for a 300B?
  100. "Old Like" sound transformer with a Tube !
  101. I coined the phrase HIGH VIVIDITY, to differentiate our amps from High Fidelity ones
  102. P-P resistance oddity
  103. Tube preamp vs. solid state
  104. 6l6 penthode triode
  105. Rising hum when turntable is plugged into preamp ??
  106. 6SL7 or 6SL7GT for broken Tubalizer
  107. Aikido PCB and AC filaments.
  108. Help with 300b proyect.
  109. 6P14P Amp Scratch Build
  110. 6GH8 - A Little Off?
  111. design and personality
  112. An all DHT push pull amp.
  113. Junk Pile Linestage
  114. need tube rectifier info
  115. Question on voltages
  116. How to change this design from penthode to triode or UL
  117. what glass-ware program?
  118. aikido 12b4 input 6sn7 output???
  119. GZ34 and temperature
  120. schematic search crate bv-60
  121. First Guitar Amp Help
  122. power supply for my single ended amp
  123. transmitter tube amp
  124. resistor and capacitor values for Aikido preamp
  125. need opinion on 2nd hand AF analyzers prices
  126. DH rectifier hookup.
  127. WE 310A vs. Russian 310A in WE91
  128. CRC PSU for preamp
  129. Question on the installation of LL1668 plate choke
  130. max plate voltage rating in tube datasheet
  131. Tube for a shunt voltage regulator
  132. choosing cap values for aikido
  133. Tubes in the Intermediate Stage
  134. c3m + 300b + miller capacitance
  135. How do I bias up a constant current series filament circuit?
  136. The perfect phono preamp.
  137. Got my 6BG6GA's last night
  138. Tubes4HiFi SP-6 preamp
  139. Stupid electrolytic cap question.......
  140. Shuguang 807s?
  141. LX-72A Sanity Check for Noooobie?
  142. Convert EL84 to 6V6? Anyone try this?
  143. PC96
  144. Ultrapath output transformers
  145. Grant RIAA phono with 12AX7/ECC83
  146. Tube VS SS voltage regulators - any advantages?
  147. Ra-a??
  148. Help with my el509 amp almost done but with one problem.
  149. McIntosh chassis help needed
  150. Tube Voltage Regulator Design
  151. DC Tube Amplifiers
  152. Coupling cap voltage rating
  153. Anyone experienced in the 76 tube?
  154. aikido thump
  155. bypassing preamp board in integrated amp
  156. Mallory FP 2x30/500 for Scott LX-72 - NOOB
  157. is it really required to use carbon comp for grid stoppers?
  158. How much trickle current can fixed bias cathode batteries stand?
  159. Who is the administrator?
  160. LM329 as voltage reference in a CCS.
  161. Euridice Preamp with 5842 and LL1660
  162. Trans. alignments
  163. Audio Note M3 Kit modification
  164. Has anyone simulated an "Aikido" amplifier?
  165. Upgrading ST70 PS w/ SS question
  166. 6N1 Chinese tube and others
  167. 12AT7 Linestage design
  168. ECF80 instead of 7199
  169. Modifying a tube tester into a curve tracer (oscilloscope X/Y outputs) ?
  170. 6922 vs 6SN7
  171. Transformer DCR's
  172. ferrite beads v. grid resistor
  173. What went wrong with my amp? Bass driver strange movement.
  174. Toccata Phono Preamp
  175. Drawbacks of Parafeed?
  176. aikido problem
  177. RS253 giant SE monoblock (Chinese)
  178. Plate chokes & Power chokes
  179. 10uF filter cap too small? PSU schematic inside
  180. HOT ROD DELUXE: CRACKLE...POP...what to do?
  181. converting Baldwin organ amp to guitar
  182. best amp for rock n roll
  183. quick question about tube relays
  184. Yeo's Simple EL84 with a twist
  185. ST-70 OPT, A-470 question
  186. meixing 805 tube amp problems
  187. Advice for NOOBie - Dad's Scott LK-72
  188. Peavey Valve King 112
  189. KT66 SE amp, grid current or not?
  190. 269EX in a champ?
  191. How do I achieve more output power?
  192. Driver stage load resistor
  193. More Edcor XSM10K/10K Specs
  194. DC filament
  195. driver stages
  196. Bay Area DIY is Cancelled Because....
  197. Is constant filament current better way to build amps?
  198. Next amp build - Trainwreck - Princeton - Deluxe ???
  199. Quicksilver M135 Output Transformers Color Code?
  200. Dynaco ST70 clone, tubes substitution question
  201. caddocks mk132: has anyone used them for tube projects?
  202. DIY Pro Audio Recording Gear - La2a, Pultec, more.
  203. size of filtering caps SS vs OTL tube
  204. Current rating and tube current draw
  205. NUCLON -- My first hybrid guitar amp
  206. PP splitters again
  207. preamp with output trannies.
  208. Is it the 6SN7 or me?
  209. My Kind of Guitar Tuner
  210. Regulating tube amp power supply - can Iget away with a simpler CLC filtering scheme?
  211. Manufacture date of 6SN7s
  212. simple 12AU7 cathode follower
  213. How's your bench, what's your favorite setup/tool ?
  214. Siemens H42 AM/FM receiver circuit diagram?
  215. 429A load lines
  216. Mu-stage on output
  217. My new project, 2 x KT88 60W amp
  218. Tube Amp Hum
  219. Modding MEIXING MC 3008
  220. crate vc 2110 schematic ???
  221. Will this work for an EL84 push pull?
  222. "Integrated" or "stand alone"
  223. Heater to cathode voltage limits in cascodes???
  224. some Japanese can help me? (OPT trafo winding)
  225. Quicksilver 8417 a class C amp?
  226. Newcomer, where to start?
  227. Benefits of Potted Output Transformers
  228. Transformer question
  229. 6AW6A, Unloaded
  230. Aikido PSU help
  231. Rectifier that doesn't need own filament supply?
  232. Plate to Cathode Cap -- what's this??
  233. Need Help Understanding/Optimising a Schematic
  234. Simple basic question quick
  235. problem on thorens PR15 (strange filaments circuity)
  236. My 1W 5687 SE Direct Coupled Power Amp
  237. VT-25 linestage + step-down trafo
  238. What to do with 803's
  239. Newbie: KT88 amp info needed
  240. 805 tube amp, uProcessor controlled
  241. Class A Tube BJT Hybrid
  242. John Broskie's enhanced T8
  243. Audio Research SP6 E
  244. André Charlin anybody got his Tube Amp
  245. Info needed - Shuguang SG120-C Integrated Amp
  246. Help with 6SN7 preamp
  247. 12b4 vs. aikido linestage
  248. KT88/6550 as Triode
  249. 6AU6WA triode connected as a line amp?
  250. A few basic noobie questions.

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