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  1. MC3500 with 807 tubes and modern driver tubes
  2. I need a project......preferably a HIFI amp..........
  3. REN904 for linestage?
  4. Urgent advice on Chinese purchase please!
  5. VR tubes, minimum current
  6. Senior Project Tube Preamp
  7. Antek AS-4T430 measurements
  8. small, light dc coupled 6ea7 amp sanity check
  9. 6S33S SE Transformer Set
  10. I think I blew my amp!! plase help
  11. Genalex VS Mullard 12AT7 & 12AX7's HUGE DIFF?
  12. testing 6550's on a Hickok 539b, same as KT88?
  13. 9V tube drive pedals - worth it?
  14. Music Angel XD-850MKIII 300b integrated amp
  15. 8150's
  16. More junk from China
  17. 6GM8 above 8mA/24V
  18. One Tube Sound Better Than Four?
  19. HK Citation V rebuild - any advice?
  20. 6GM8/ECC86
  21. Sound Valves vtp-101 Schematic
  22. ~17-18w sweep tube with large plate cap
  23. Fisher 500B Comparison
  24. New build of P-P PCL86 Amp
  25. Transformer question
  26. Can 110V Quad IIs be configured to 220V?
  27. Advice needed re repairing Audio Research VT100
  28. Yaqin SD-CD3 Tube Buffer - upgrading caps
  29. Gyrator PSU's in tube amps
  30. EL34 Amp Running KT66, Safe ?
  31. MJ Optimized Valve Regulator
  32. Need JAN 6418 tube stereo headphone preamp kit advice!
  33. Electronic choke
  34. Can you please help identifying this amp?
  35. [TubeAmp] Beginner's questions
  36. .47uF output cap to 1uF?
  37. Spark gaps on output transformers
  38. St 35 or St 70?
  39. Pi wound output transformers
  40. miniatures 6n1p 6n2p
  41. HK Citation V schematic?
  42. Help! can't find ef86 on my Hickok 539b roll chart! and need a tube project
  43. Physical Oscillating noise from phono stage
  44. PP 6c33c-b
  45. Modifying the classic Williamson
  46. eimac 152TL and 304TL
  47. LTspice model for Dynaco A470 Output Transfomer
  48. audiodesignguide.com PP KT88
  49. One more 4P1L SE
  50. Mount rectifier above torroidal transformer?
  51. Extending Tube Sockets off a PCB
  52. EMG 200 tube tester
  53. Looking for a great starter stereo P-P amp
  54. Question regarding value of Telefunken tubes.
  55. Magic Eye tube
  56. Partridge Transformers
  57. 6CG7 replacing E88CC in SE KT88 Amp.
  58. Omit the filament windings -- LTM8033 from Linear
  59. Best position for bleeder resistor?
  60. anyone have experience with a Radio Craftsmen C400?
  61. Amp-A, a variation to the EL84 Push Pull theme
  62. tony's 6LU8 push-pull power amp build
  63. First Post Here
  64. MFA Lumi sings high-pitched tunes
  65. Power tubes not drawing current
  66. replacing tubes with circuitry
  67. High Voltage Regulators (Maida or zener)
  68. GU-81m tube amp schematics???
  69. Suggestions on SIPP driver stage
  70. How to eliminate the "white noise" for the 300B tube amp?
  71. 6BQ5 UL Curves?
  72. Looking for simple Schematic of 2A3 or 45 or 26 Headphone Amp SE OTL ? anyone ?
  73. 6N1P and 6N6P OTL headphone amp
  74. New Project
  75. Understanding Steve Bench's regulated power supply
  76. Preamp with buffer design
  77. JP200 preamp?
  78. IFI 6SN7 X3 (6N8P-6H8C) Tube Valve Preamp Kit Board from eBay
  79. New Tube Manufacture?
  80. Lowering B+ in PS
  81. Rectifier tube blows
  82. direct coupling
  83. Need some help with these tubes
  84. Edcor GSXE10-8-5K primary Inductance?
  85. My "Red board" chassis
  86. PP EL34
  87. Building something better with a Chinese SE EL34B Amp DIY Kit
  88. Problem with my amp, and I have run out of ideas
  89. Value of coupling caps
  90. Testing 6BQ5 on Hickok I-177B
  91. Stepped Attenuator for AI Modulus IIA
  92. Tubes are beautifully colored....right?
  93. Differential Input for Aikido Amp?
  94. MY BEST OTL PREAMPLIFIER
  95. Valve testing machine
  96. Line stage with 12AU7 and 6CG7 anyone?
  97. MingDa MC845-C or Opera COnsonance Reference 9.9
  98. Lower gain 12AX7?
  99. Needed: schematic for Ming Da MC34ab
  100. Solid State Cathodyne Phase Splitter Device?
  101. My Wave Isn't Square.
  102. 6J7 driver in WE91 like amplifier
  103. F2a - C3m Monkey
  104. balanced/unbalanced questions decision time
  105. Stern's saville double 6
  106. GM70 psu transformer.
  107. Antek toroidal vs Edcor?
  108. current production pentode, I_a ~ 8mA
  109. Brook 10c clone
  110. Unknown lamps need help
  111. What's wrong with this?
  112. Microphonics from C0G Caps across Heaters
  113. Yarland FV34CIII vs Synthesis Nimis
  114. 12AT7 and TDA1543...
  115. Eico Hf-81 Integrated Amplifier
  116. Tubed voltage regulator for KT88se amp, need help ?
  117. 1st post what can i build with this?
  118. CJ PV-3 voltage values for schematic
  119. From KT90 to KT88
  120. side by side bifilar windings in excess of 1000 volts
  121. looking for a great tube amp book.
  122. Revox G36 Mod for preamp
  123. 33 in triode mode...any experience ?
  124. Help with Decware Zen EL84 SET
  125. Find schematic of amplifier mcintosh mc 275 mkiv
  126. Heater wiring - Coaxial?
  127. now mono blocks!
  128. Heathkit AA-40 or AA-121
  129. UTC o-9 ouncers for headphone amp?
  130. Help modify 6H30 Mu-follower stage
  131. Help me to identify unknown tube
  132. Valve Compressor Circuit
  133. Choke orientation (Need help)
  134. push pull 813 tube in ultra linear mode
  135. AD1865 DAC + 6SN7 analogue stage
  136. Inexpensive tube amplifier kits?
  137. SET amp/speaker issue.
  138. No pre-Amp - Pre Amp
  139. Found a CHEAP source of output transformers in Europe
  140. How calculate cathode LEDs biased
  141. ESR test for tube amps ?
  142. asking help/knowledge asked: luxman d105u output stage
  143. Have you ever seen a 4 pin blue Alps pot??? need help
  144. Any ideas on this one???
  145. Why not 6C41C used in OTL??
  146. 6p14p(EL84) SE with 6n6p build jurnal
  147. Oscilloscope - Which one should I get ? What to look for?
  148. "Jonokuchi" - new desktop amp, or "Little red board"?
  149. Robust Driver stage recommendations
  150. Wireless World valve articles from the past
  151. Overshoot and Ringing
  152. Harman Kardon A50K
  153. HiFi Tube amp project
  154. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  155. Tone control - good diagram needed
  156. Dolby AC3 coming on nicely.
  157. Power Supply Question
  158. Dynatuner FM-1 Restoration
  159. faulty audioromy 6550 no output and very faith sound please help
  160. just one tube preamp or driver
  161. Power triode preamp a different way
  162. 49.95 Tube amp?!
  163. Which cap for the Musical Machine?
  164. How much power do I need in the kitchen?
  165. Grounding check for SE 300B amp
  166. Suggest me a build for HD600 headphones
  167. 6BQ5 Screen Voltage Regulator
  168. 6SN7 Tubes
  169. My first tube Amplifier VT4C DIY record
  170. Amplifier output wattage test
  171. Troubble shooting help please.....
  172. Heater Wiring
  173. 220/110 step down in reverse ... and more
  174. Input Level Devil please help
  175. Soft start for a preamp?
  176. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  177. Using one KT77 and one EL34 per side?
  178. Help identifying transformer wires.
  179. tube pre and tube power amp
  180. Spice Models for Tubes w Screen Grid by Gurski
  181. Theremin project needs some help!
  182. Transformer abuse or other use
  183. aikido heater voltage
  184. HY51Z datasheet, help !!!
  185. 6L6 amp with unique phase splitter - check my math
  186. Dynaco A451 Output Transformer
  187. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  188. 6AU6 preamp problem
  189. Help identifying a Telefunken(?) tube...
  190. UCC85 and e-pay
  191. Lundahl LL1676 - missing data
  192. valve phono pre-amp HELP needed
  193. Preamp pcb
  194. Strange Problem In Tube Amp Build
  195. Output transformer question
  196. Replacing ECL86/6GW8 to PCL86(14GW8)???
  197. On or Off?
  198. Neg-Feedback into Grid of gain stage instead of cathode?
  199. Accuphase F-25 Japanese manual translation help!
  200. Negative supply with CT tranny
  201. E130L SE again
  202. tony builds a 7N7 preamp
  203. Tango 10429 78% Nickle Output Transformer?
  204. Bias for Ipod Input
  205. What about this driver????
  206. allen organ amp 75
  207. Needs help Tubezone Poseidon
  208. Lightbulb trick on filament circuit?
  209. AMC CVT3030a Help for repair
  210. TF110-48/UL in the UK?
  211. hum in pas2
  212. Aikido Cathode Follwer Question
  213. Question Regarding a Partial Feedback 807 SE
  214. Leftover transformers
  215. Newbie "In Search of help"
  216. ELL80/ECLL800 Cathode follower
  217. The "Tube" bookshelf
  218. knight KG-240? low output help
  219. Vacuum tube VCO
  220. JE lab 2a3 , fizzy, squeal in one channel, help
  221. Trouble with a DIY EL34 Tube Amp Kit
  222. SPICE Transformer Model Spreadsheet
  223. Choosing the right triode as a Phase Inverter
  224. toob noob with GE 5670 and I'd like to do something with it. Help?
  225. my first tube amp, no tubes...
  226. Enough heat to power my CD player...
  227. My first tube amp: 6C33C
  228. S5 16LS kit as a first DIY tube build?
  229. lady day we 91 psu mod help
  230. On days like these ...
  231. The Magnetron - A Low Noise, Long Life Amplifier????
  232. 6M11's
  233. DC coupled 300B idea - request for comments
  234. Fisher bias
  235. How does anode voltage swing to twice HT voltage?
  236. Can a 7625 Ceramic Planar Triode be soldered ?
  237. AMI "DD" Project: 6L6
  238. Plate loading questions
  239. EZ81 rectifier
  240. PY500a
  241. Tube Regulator Thoughts?
  242. Fully balanced from cartridge to loudspeaker - a little help needed!
  243. OPT on the speaker side?
  244. tube circuit conversions?
  245. Current inrush limiter suggestions
  246. Repair of Philips EL6416 amplifiers.
  247. GU-19 In priboi
  248. Duncan Amps PSU Designer II
  249. using existing pre with this circuit
  250. Antek AT-070L Specs

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