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  1. Determining cap values (old radio)
  2. thoughts on 300b operating points with 3k output
  3. Grounded Grid wiring question
  4. PP-Triode , PP-UL , PP-Pentode-strapped-as-Triode
  5. Found some EC8010
  6. SE PX4 or PX25 amp, anyone built one????????
  7. HAL-O Damping Instruments
  8. An intriguing 6S45P direct coupled 300B amplifier
  9. difference between Cayin and Jolida
  10. 417a line preamp help
  11. kenwood trio el84 push pull schematic
  12. Any comments on this design?
  13. Amp for speaker testing
  14. Shielding preamp power supply
  15. Troubleshooting EL34 push pull amp
  16. amp input volume
  17. What Mullard 12AX7 is better?
  18. Universal audio / Avalon mic pre schematics
  19. Since transconductance amps has become so popular lately...
  20. Mecanical PSU hum
  21. help i.d. this amplifier
  22. Question about a hybrid PSU design
  23. 35Z5GT half-wave rectifier
  24. Riviera 725 guitar tubes amp
  25. Best place to use 2 Jupiter Bee caps in tube amp?
  26. what rating for diode of 450Volts DC
  27. Telefunken 6L6GC ???????
  28. Why are my amps doing this?
  29. How to calculate the gain of an input-driver stage?
  30. 6L6 vs EL34
  31. protect your amps
  32. Snap Ring Octal Sockets
  33. Suitable operating point for 6SN7 as a differential driver ?
  34. Suitable rectifier
  35. 6N1P & SV83 mu stage driving 845?
  36. Has anyone built a transformer coupled preamp?
  37. Circuit diagram for RCA vintage 6BQ5 amplifier?
  38. Driver valve discussion
  39. Help to choose the tubes!
  40. Why hum in one channel only?
  41. DC heater noise WORSE than AC
  42. Rdh 4
  43. 900v B+ Silly time.
  44. tube rectifier arrangement
  45. Matrix Amp?
  46. Dynaco Stereo 70 amplifier
  47. Ultimate power switch?
  48. AC or DC current for 300B and 2A3 tube filaments ?
  49. 0.1uF @ 3000V Ceramic?
  50. Power Triodes in current production
  51. Anyone in the world identify eico trans?
  52. Mullard 5-20 in triode mode
  53. THX certification, or integrated near THX Quality,
  54. Feedback resistor on Baxandall tone stack?
  55. SE Pentode or PP Triode ?
  56. how does one "voice" a tube amp
  57. Musical fidelity Nu-Vista
  58. Tube substitutions in Heathkit W5M
  59. PSUD2 question
  60. 6L6 class A P-P CFB amp
  61. i have a matched pair of 3cx1000a7..
  62. Different silvering patterns on tube tops?
  63. Designing Guitar Amp's Project
  64. Help with amp rebuild
  65. Mystery (to me) phase inverter?
  66. Biasing
  67. SE KT88 Amp
  68. Good design?
  69. Auto Biasing
  70. nuvistor MC step up
  71. Corian for tube amp?
  72. 6AQ5 Line stage?
  73. 6550 o/p stage
  74. Help with finding preamp schematic
  75. AVO data for 8417 (Quicksilver) tubes
  76. Any experience with this nice toroidal OT?
  77. 300B SE cathode feedback to grid?
  78. hummmmmmm?
  79. ERO KP1832 Bypass Caps for sale
  80. no bass makes pedro a whiny boy
  81. Iron, glass, sand and lead.
  82. Is this any good? Considerations
  83. 2A3 SET Output Transformer opinions/recommendations
  84. My 6C45 DC 6C41, advice wanted
  85. DIY valve
  86. A good SE project?
  87. who will build me this special "line tubeamp"
  88. PI filters
  89. Designing a simple dc filament supply?
  90. Rogers Cadett amp
  91. HI & a few words/questions ...
  92. 6d22s
  93. eBay
  94. Chassis layout for Stereo JE Labs 300BDX
  95. Output transformer help
  96. CAD Program for Tubes
  97. 801A/816 tubes wanted
  98. This little thing might save your life!
  99. What happens if I loose the cathode bias?
  100. beginners ecl82 power supply
  101. 2MHz, High voltage source?
  102. beginner's ecl82
  103. Handmade Electronics Metal Punches?
  104. EL34 types
  105. Spice Model 6CW4
  106. El/pl 519
  107. Euridice symetric to Amp?
  108. use of 6dj8 as driver on a direct coupled 2a3 se amp
  109. Western Electric 275A Schematic
  110. Where to source 833 power tube
  111. capacitor reactance
  112. Overvoltaging resistors
  113. EL84 Push Pull amp.
  114. Power supply load capacity
  115. Tube preamp problem
  116. E88C (6DL4/ 8255), any circuit for it?
  117. Is there a name for this drive method?
  118. 6BM8 Question
  119. Tube mic preamp/mixer
  120. Please cast your votes..or make a suggestion or 2
  121. RIAA in LTspice
  122. Parallel ECC82 comment please
  123. A push-pull amp i can live with
  124. Sub-miniature russian amp help
  125. Tube Optical-Isolation Unit
  126. MKP in the Powersupply.
  127. 6SN7-GTB Globe (Chinese)
  128. 12BH7 Specs
  129. Is this worth my time?
  130. choke value
  131. ipod + tubes
  132. Leak tl/25+ OPT selection
  133. Gabevee's Maggie (MAG1515)
  134. Can partial feedback be as effective as global fb for decent damping factor?
  135. Which trans wire is which?
  136. What's wrong with this tube?
  137. F: great sound control with ECC82
  138. 30W UL 6L6P-P amp
  139. 300B stereo SE amp and PP2A3 monoblocks
  140. 6S45P matching
  141. Inductors made for crossover in an amp?
  142. PX4 or AVO44 or AV044 based SETA
  143. power conditioning
  144. Microphone preamp with compressor
  145. Current production rectifiers
  146. mu stage help...
  147. Non-Polar caps to cathode bypass
  148. 5u4 / solid state switchable supply
  149. 12AX7 sound ... going with the trend
  150. 6L6 PP Design Recommendations?
  151. EL 34 30W ultra linear
  152. Convert Audion Silver Knight PP monos
  153. Too much gain
  154. The long lost linear gain stage
  155. Philco power tranny diagram/5u4 supply
  156. Kt88 Se
  157. supersize me, please. (powersupply)
  158. Seeking advice on "Circlotron" cross-coupled feedback OTL design
  159. Best 6CA7?
  160. ECC99 line preamp
  161. coupling caps???
  162. variable regulated negitive grid supply
  163. hum loop advice
  164. Against all odds...
  165. 6as7 se amp
  166. Help .. tube amplifier .. 1st !
  167. winding a toroidal pp output
  168. solid state Vs Tube Rectification
  169. Cryoed Tubes...what To Expect?
  170. I'm looking for 6H13C tubes
  171. Which ST-70 ?
  172. Some questions about Van Scoyoc X-coupled splitter
  173. Quicksilver 8417 bias runaway?
  174. Most effective use of valve pre & active xover
  175. Tube possibilities for 2.9k-ohm speaker?
  176. Help on Preamp Mute Switch
  177. Fixed bias supply problems...
  178. Help with VTL preamp...
  179. question about 811A and 572B
  180. Dual Stereo Cathode Folower Setup
  181. tube tester
  182. Audio Innovation 1000 SE
  183. 6as7 PP Schematic Help
  184. Newbie Question: Need help diagnosing a problem, tubes on, music fades out quickly
  185. 7591EH failure
  186. opt frequency response
  187. Anyone got any opinions on this?
  188. My ForePlay Processor Controlled Preamp
  189. Tube ghetto blaster ?
  190. Help trouble shooting
  191. "The Fisher" tube amp 7189 output tubes
  192. UTC output transformers specs
  193. Regulation options for 807 g2
  194. My Mullard 5/20
  195. Anyone tried Black Beauty caps??
  196. KT88 power amp
  197. High voltage regulator
  198. Filament voltage ?
  199. Unity Gain Unbalanced to Balanced Phase Splitter
  200. Anyone know the g1-g2 capacitance of 6AU6?
  201. Any good Transformer or Tube manufactureres in India ?
  202. McMartin MA-20?
  203. Help with Jolida 302A
  204. need 13fd7 curves
  205. Drd Kt88?
  206. miniature tube amp
  207. 300B pp schematic found, what about it?
  208. Tube Output Stage
  209. se otl
  210. Toroidals as OPTs?
  211. Tube advice
  212. Understanding OPT primary Z and load matching.
  213. help with Optomal placement of output transformers.
  214. 50h B26
  215. Anyone know what this is?? Strange tube/ bulb.
  216. Please ID output transformer
  217. Cheap and Easy Tube Phono Preamp
  218. Carbon film vs metal film resistors in a stepped attenuator?
  219. Alps pots vs. TKD pots? TKD worth the extra$$?
  220. Opamp as tube driver: Protection ideas?
  221. Looking for schematics CROFT OTL APPARITION
  222. ISO (new Tango) info...
  223. Noob Question on Driver Stages
  224. High Voltage Reference
  225. DIY valve amp
  226. JJ multisection caps
  227. Inverted Interstage Transformer
  228. regarding to the design of iron-cored inductors (chokes)
  229. Trying to find an amp
  230. 12v tube output stage for cs43122 based dac?
  231. Wattages & Loudness: ?I'm Lost?
  232. cmrr of common cathode
  233. The Next Step. (and budget tube amplifier kits/designs).
  234. non-diy amplifiers with choke input power supplies
  235. Does a cathode bypass capacitor reduce hum?
  236. a tube convert tries a mosfet
  237. Motorboating in leak 20
  238. New MC preamp is comming alive
  239. HV tubes
  240. power supply pspice simulation problem
  241. Can a tube rectifier handle a C dual LC?
  242. Valve schematic & PC board design
  243. Just acqired some strange tubes.........
  244. Sovtek 6L6WXT
  245. RCA tubes, need info
  246. Stromberg Carlson 245M
  247. mounting tubes upside-down
  248. 6922 acting strange........or is it ?
  249. Fender Champ: What Transformers?
  250. Naive CCS quesion

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