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  1. constant current filament regs
  2. 6SN7 Basics (Newbie)
  3. Anyone tried the EH fat bottle 6CA7?
  4. TJ Tubes
  5. My tubes are going down. HELP !!!!
  6. Tino Zottola...where are you ?
  7. Lilliput amp
  8. filament rails
  9. Ss Diodes??
  10. Tube mic preamp
  11. CCS Filament Regulators for split filaments
  12. Quicksilver 8417 power supply caps?
  13. Audio Research LS7
  14. simple valve preamp
  15. valve preamp
  16. stand by switch or not?
  17. Omega Grand 6 and which amp?
  18. Line amp to speakers
  19. a bit more bass?
  20. Output transformer application help please.
  21. 5687 pre...some problems
  22. Recommendations needed for designs of PP pentode strapped as Triode
  23. KT88 push pull noob questions (sry)
  24. Need help identifying Stromberg Carlson Amp
  25. help needed diagnosing Grounded Grid power supply
  26. Building a tube Model????
  27. EL34 best for triode strapping ?
  28. Subwoofer amp
  29. Replacing Valves
  30. help me on 845 scheme....
  31. Help valve newb salvage some old TV tubes
  32. Cathode follower distortion results
  33. Bullet Proof 6L6GC Recommendation PLEASE
  34. newbie recomendations please
  35. NOS Tubes
  36. Audio Research CA-50 tube rolling
  37. OT on Decaware SE84C-S
  38. Change PP Amp Into Phono Pre?
  39. pl84 ore el84
  40. VTL Compact 100 Monoblock x 2.
  41. Battery bias a 6SU7 in the 300b billies
  42. Speaker impedance roughly 6 ohms, 2A3 SET...
  43. B2 Spice SE tranformer parameters
  44. Determining cap values (old radio)
  45. thoughts on 300b operating points with 3k output
  46. Grounded Grid wiring question
  47. PP-Triode , PP-UL , PP-Pentode-strapped-as-Triode
  48. Found some EC8010
  49. SE PX4 or PX25 amp, anyone built one????????
  50. HAL-O Damping Instruments
  51. An intriguing 6S45P direct coupled 300B amplifier
  52. difference between Cayin and Jolida
  53. 417a line preamp help
  54. kenwood trio el84 push pull schematic
  55. Any comments on this design?
  56. Amp for speaker testing
  57. Shielding preamp power supply
  58. Troubleshooting EL34 push pull amp
  59. amp input volume
  60. What Mullard 12AX7 is better?
  61. Universal audio / Avalon mic pre schematics
  62. Since transconductance amps has become so popular lately...
  63. Mecanical PSU hum
  64. help i.d. this amplifier
  65. Question about a hybrid PSU design
  66. 35Z5GT half-wave rectifier
  67. Best place to use 2 Jupiter Bee caps in tube amp?
  68. what rating for diode of 450Volts DC
  69. Telefunken 6L6GC ???????
  70. Why are my amps doing this?
  71. How to calculate the gain of an input-driver stage?
  72. 6L6 vs EL34
  73. protect your amps
  74. Snap Ring Octal Sockets
  75. Suitable operating point for 6SN7 as a differential driver ?
  76. Suitable rectifier
  77. 6N1P & SV83 mu stage driving 845?
  78. Has anyone built a transformer coupled preamp?
  79. Circuit diagram for RCA vintage 6BQ5 amplifier?
  80. Driver valve discussion
  81. Help to choose the tubes!
  82. Why hum in one channel only?
  83. DC heater noise WORSE than AC
  84. Rdh 4
  85. 900v B+ Silly time.
  86. tube rectifier arrangement
  87. Matrix Amp?
  88. Dynaco Stereo 70 amplifier
  89. Ultimate power switch?
  90. AC or DC current for 300B and 2A3 tube filaments ?
  91. 0.1uF @ 3000V Ceramic?
  92. Power Triodes in current production
  93. Anyone in the world identify eico trans?
  94. Mullard 5-20 in triode mode
  95. THX certification, or integrated near THX Quality,
  96. Feedback resistor on Baxandall tone stack?
  97. SE Pentode or PP Triode ?
  98. how does one "voice" a tube amp
  99. Musical fidelity Nu-Vista
  100. Tube substitutions in Heathkit W5M
  101. PSUD2 question
  102. 6L6 class A P-P CFB amp
  103. i have a matched pair of 3cx1000a7..
  104. Different silvering patterns on tube tops?
  105. Help with amp rebuild
  106. Mystery (to me) phase inverter?
  107. Biasing
  108. SE KT88 Amp
  109. Good design?
  110. Auto Biasing
  111. nuvistor MC step up
  112. Corian for tube amp?
  113. 6AQ5 Line stage?
  114. 6550 o/p stage
  115. Help with finding preamp schematic
  116. AVO data for 8417 (Quicksilver) tubes
  117. Any experience with this nice toroidal OT?
  118. 300B SE cathode feedback to grid?
  119. hummmmmmm?
  120. no bass makes pedro a whiny boy
  121. Iron, glass, sand and lead.
  122. Is this any good? Considerations
  123. 2A3 SET Output Transformer opinions/recommendations
  124. My 6C45 DC 6C41, advice wanted
  125. DIY valve
  126. A good SE project?
  127. who will build me this special "line tubeamp"
  128. PI filters
  129. Designing a simple dc filament supply?
  130. Rogers Cadett amp
  131. HI & a few words/questions ...
  132. 6d22s
  133. eBay
  134. Chassis layout for Stereo JE Labs 300BDX
  135. Output transformer help
  136. CAD Program for Tubes
  137. 801A/816 tubes wanted
  138. This little thing might save your life!
  139. What happens if I loose the cathode bias?
  140. beginners ecl82 power supply
  141. 2MHz, High voltage source?
  142. beginner's ecl82
  143. Handmade Electronics Metal Punches?
  144. EL34 types
  145. Spice Model 6CW4
  146. El/pl 519
  147. Euridice symetric to Amp?
  148. use of 6dj8 as driver on a direct coupled 2a3 se amp
  149. Western Electric 275A Schematic
  150. Where to source 833 power tube
  151. capacitor reactance
  152. Overvoltaging resistors
  153. EL84 Push Pull amp.
  154. Power supply load capacity
  155. Tube preamp problem
  156. E88C (6DL4/ 8255), any circuit for it?
  157. Is there a name for this drive method?
  158. 6BM8 Question
  159. Tube mic preamp/mixer
  160. Please cast your votes..or make a suggestion or 2
  161. RIAA in LTspice
  162. Parallel ECC82 comment please
  163. A push-pull amp i can live with
  164. Sub-miniature russian amp help
  165. Tube Optical-Isolation Unit
  166. MKP in the Powersupply.
  167. 6SN7-GTB Globe (Chinese)
  168. 12BH7 Specs
  169. Is this worth my time?
  170. choke value
  171. ipod + tubes
  172. Leak tl/25+ OPT selection
  173. Gabevee's Maggie (MAG1515)
  174. Can partial feedback be as effective as global fb for decent damping factor?
  175. Which trans wire is which?
  176. What's wrong with this tube?
  177. F: great sound control with ECC82
  178. 30W UL 6L6P-P amp
  179. 300B stereo SE amp and PP2A3 monoblocks
  180. 6S45P matching
  181. Inductors made for crossover in an amp?
  182. PX4 or AVO44 or AV044 based SETA
  183. power conditioning
  184. Microphone preamp with compressor
  185. Current production rectifiers
  186. mu stage help...
  187. Non-Polar caps to cathode bypass
  188. 5u4 / solid state switchable supply
  189. 12AX7 sound ... going with the trend
  190. 6L6 PP Design Recommendations?
  191. EL 34 30W ultra linear
  192. Convert Audion Silver Knight PP monos
  193. Too much gain
  194. The long lost linear gain stage
  195. Philco power tranny diagram/5u4 supply
  196. Kt88 Se
  197. supersize me, please. (powersupply)
  198. Seeking advice on "Circlotron" cross-coupled feedback OTL design
  199. Best 6CA7?
  200. ECC99 line preamp
  201. coupling caps???
  202. variable regulated negitive grid supply
  203. hum loop advice
  204. Against all odds...
  205. 6as7 se amp
  206. Help .. tube amplifier .. 1st !
  207. winding a toroidal pp output
  208. solid state Vs Tube Rectification
  209. Cryoed Tubes...what To Expect?
  210. I'm looking for 6H13C tubes
  211. Which ST-70 ?
  212. Some questions about Van Scoyoc X-coupled splitter
  213. Quicksilver 8417 bias runaway?
  214. Most effective use of valve pre & active xover
  215. Tube possibilities for 2.9k-ohm speaker?
  216. Help on Preamp Mute Switch
  217. Fixed bias supply problems...
  218. Help with VTL preamp...
  219. question about 811A and 572B
  220. Dual Stereo Cathode Folower Setup
  221. tube tester
  222. Audio Innovation 1000 SE
  223. 6as7 PP Schematic Help
  224. Newbie Question: Need help diagnosing a problem, tubes on, music fades out quickly
  225. 7591EH failure
  226. opt frequency response
  227. Anyone got any opinions on this?
  228. My ForePlay Processor Controlled Preamp
  229. Tube ghetto blaster ?
  230. Help trouble shooting
  231. "The Fisher" tube amp 7189 output tubes
  232. UTC output transformers specs
  233. Regulation options for 807 g2
  234. My Mullard 5/20
  235. KT88 power amp
  236. High voltage regulator
  237. Filament voltage ?
  238. Unity Gain Unbalanced to Balanced Phase Splitter
  239. Anyone know the g1-g2 capacitance of 6AU6?
  240. Any good Transformer or Tube manufactureres in India ?
  241. McMartin MA-20?
  242. Help with Jolida 302A
  243. need 13fd7 curves
  244. Drd Kt88?
  245. miniature tube amp
  246. 300B pp schematic found, what about it?
  247. Tube Output Stage
  248. se otl
  249. Toroidals as OPTs?
  250. Tube advice

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