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  1. PP 6c33c-b
  2. Modifying the classic Williamson
  3. eimac 152TL and 304TL
  4. LTspice model for Dynaco A470 Output Transfomer
  5. audiodesignguide.com PP KT88
  6. One more 4P1L SE
  7. Mount rectifier above torroidal transformer?
  8. Extending Tube Sockets off a PCB
  9. EMG 200 tube tester
  10. Looking for a great starter stereo P-P amp
  11. Question regarding value of Telefunken tubes.
  12. Magic Eye tube
  13. Partridge Transformers
  14. 6CG7 replacing E88CC in SE KT88 Amp.
  15. Omit the filament windings -- LTM8033 from Linear
  16. Best position for bleeder resistor?
  17. anyone have experience with a Radio Craftsmen C400?
  18. Amp-A, a variation to the EL84 Push Pull theme
  19. tony's 6LU8 push-pull power amp build
  20. First Post Here
  21. MFA Lumi sings high-pitched tunes
  22. Power tubes not drawing current
  23. replacing tubes with circuitry
  24. High Voltage Regulators (Maida or zener)
  25. GU-81m tube amp schematics???
  26. Suggestions on SIPP driver stage
  27. How to eliminate the "white noise" for the 300B tube amp?
  28. 6BQ5 UL Curves?
  29. Looking for simple Schematic of 2A3 or 45 or 26 Headphone Amp SE OTL ? anyone ?
  30. 6N1P and 6N6P OTL headphone amp
  31. New Project
  32. Understanding Steve Bench's regulated power supply
  33. Preamp with buffer design
  34. JP200 preamp?
  35. IFI 6SN7 X3 (6N8P-6H8C) Tube Valve Preamp Kit Board from eBay
  36. New Tube Manufacture?
  37. Lowering B+ in PS
  38. Rectifier tube blows
  39. direct coupling
  40. Need some help with these tubes
  41. Edcor GSXE10-8-5K primary Inductance?
  42. My "Red board" chassis
  43. PP EL34
  44. Building something better with a Chinese SE EL34B Amp DIY Kit
  45. Problem with my amp, and I have run out of ideas
  46. Value of coupling caps
  47. Testing 6BQ5 on Hickok I-177B
  48. Stepped Attenuator for AI Modulus IIA
  49. Tubes are beautifully colored....right?
  50. Differential Input for Aikido Amp?
  51. MY BEST OTL PREAMPLIFIER
  52. Valve testing machine
  53. Line stage with 12AU7 and 6CG7 anyone?
  54. Vibrating capacitor
  55. MingDa MC845-C or Opera COnsonance Reference 9.9
  56. Lower gain 12AX7?
  57. Needed: schematic for Ming Da MC34ab
  58. Solid State Cathodyne Phase Splitter Device?
  59. My Wave Isn't Square.
  60. 6J7 driver in WE91 like amplifier
  61. F2a - C3m Monkey
  62. balanced/unbalanced questions decision time
  63. Stern's saville double 6
  64. GM70 psu transformer.
  65. Antek toroidal vs Edcor?
  66. current production pentode, I_a ~ 8mA
  67. Brook 10c clone
  68. Unknown lamps need help
  69. What's wrong with this?
  70. Microphonics from C0G Caps across Heaters
  71. Yarland FV34CIII vs Synthesis Nimis
  72. 12AT7 and TDA1543...
  73. Eico Hf-81 Integrated Amplifier
  74. Tubed voltage regulator for KT88se amp, need help ?
  75. 1st post what can i build with this?
  76. CJ PV-3 voltage values for schematic
  77. How to analyze square waves?
  78. From KT90 to KT88
  79. side by side bifilar windings in excess of 1000 volts
  80. looking for a great tube amp book.
  81. Revox G36 Mod for preamp
  82. 33 in triode mode...any experience ?
  83. Help with Decware Zen EL84 SET
  84. Bumblebee Caps
  85. Find schematic of amplifier mcintosh mc 275 mkiv
  86. Heater wiring - Coaxial?
  87. now mono blocks!
  88. Heathkit AA-40 or AA-121
  89. UTC o-9 ouncers for headphone amp?
  90. Help modify 6H30 Mu-follower stage
  91. Help me to identify unknown tube
  92. Valve Compressor Circuit
  93. Should I rebuild my Eico 950 Cap Tester?
  94. Choke orientation (Need help)
  95. push pull 813 tube in ultra linear mode
  96. AD1865 DAC + 6SN7 analogue stage
  97. Inexpensive tube amplifier kits?
  98. SET amp/speaker issue.
  99. No pre-Amp - Pre Amp
  100. Found a CHEAP source of output transformers in Europe
  101. How calculate cathode LEDs biased
  102. ESR test for tube amps ?
  103. asking help/knowledge asked: luxman d105u output stage
  104. Have you ever seen a 4 pin blue Alps pot??? need help
  105. Any ideas on this one???
  106. Why not 6C41C used in OTL??
  107. 6p14p(EL84) SE with 6n6p build jurnal
  108. Oscilloscope - Which one should I get ? What to look for?
  109. "Jonokuchi" - new desktop amp, or "Little red board"?
  110. Robust Driver stage recommendations
  111. Wireless World valve articles from the past
  112. Overshoot and Ringing
  113. B&K Tube Tester
  114. Harman Kardon A50K
  115. HiFi Tube amp project
  116. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  117. Tone control - good diagram needed
  118. Dolby AC3 coming on nicely.
  119. Power Supply Question
  120. Dynatuner FM-1 Restoration
  121. faulty audioromy 6550 no output and very faith sound please help
  122. just one tube preamp or driver
  123. Power triode preamp a different way
  124. 49.95 Tube amp?!
  125. Which cap for the Musical Machine?
  126. How much power do I need in the kitchen?
  127. 1Gohm or higher resistor ...
  128. Grounding check for SE 300B amp
  129. Suggest me a build for HD600 headphones
  130. 6BQ5 Screen Voltage Regulator
  131. 6SN7 Tubes
  132. My first tube Amplifier VT4C DIY record
  133. Amplifier output wattage test
  134. Troubble shooting help please.....
  135. Heater Wiring
  136. 220/110 step down in reverse ... and more
  137. Input Level Devil please help
  138. Soft start for a preamp?
  139. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  140. Using one KT77 and one EL34 per side?
  141. Help identifying transformer wires.
  142. tube pre and tube power amp
  143. Spice Models for Tubes w Screen Grid by Gurski
  144. Theremin project needs some help!
  145. Transformer abuse or other use
  146. aikido heater voltage
  147. HY51Z datasheet, help !!!
  148. 6L6 amp with unique phase splitter - check my math
  149. Dynaco A451 Output Transformer
  150. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  151. 6AU6 preamp problem
  152. Help identifying a Telefunken(?) tube...
  153. UCC85 and e-pay
  154. Lundahl LL1676 - missing data
  155. valve phono pre-amp HELP needed
  156. Preamp pcb
  157. Strange Problem In Tube Amp Build
  158. Output transformer question
  159. Replacing ECL86/6GW8 to PCL86(14GW8)???
  160. On or Off?
  161. Neg-Feedback into Grid of gain stage instead of cathode?
  162. Accuphase F-25 Japanese manual translation help!
  163. Negative supply with CT tranny
  164. E130L SE again
  165. tony builds a 7N7 preamp
  166. Tango 10429 78% Nickle Output Transformer?
  167. Bias for Ipod Input
  168. What about this driver????
  169. allen organ amp 75
  170. Needs help Tubezone Poseidon
  171. Lightbulb trick on filament circuit?
  172. AMC CVT3030a Help for repair
  173. TF110-48/UL in the UK?
  174. hum in pas2
  175. Aikido Cathode Follwer Question
  176. Fuses...what's the deal?
  177. Question Regarding a Partial Feedback 807 SE
  178. Leftover transformers
  179. Newbie "In Search of help"
  180. ELL80/ECLL800 Cathode follower
  181. The "Tube" bookshelf
  182. knight KG-240? low output help
  183. Vacuum tube VCO
  184. JE lab 2a3 , fizzy, squeal in one channel, help
  185. Trouble with a DIY EL34 Tube Amp Kit
  186. SPICE Transformer Model Spreadsheet
  187. Choosing the right triode as a Phase Inverter
  188. toob noob with GE 5670 and I'd like to do something with it. Help?
  189. my first tube amp, no tubes...
  190. Enough heat to power my CD player...
  191. My first tube amp: 6C33C
  192. S5 16LS kit as a first DIY tube build?
  193. lady day we 91 psu mod help
  194. On days like these ...
  195. The Magnetron - A Low Noise, Long Life Amplifier????
  196. 6M11's
  197. DC coupled 300B idea - request for comments
  198. Fisher bias
  199. How does anode voltage swing to twice HT voltage?
  200. Can a 7625 Ceramic Planar Triode be soldered ?
  201. AMI "DD" Project: 6L6
  202. Plate loading questions
  203. EZ81 rectifier
  204. PY500a
  205. Tube Regulator Thoughts?
  206. Fully balanced from cartridge to loudspeaker - a little help needed!
  207. OPT on the speaker side?
  208. tube circuit conversions?
  209. Current inrush limiter suggestions
  210. Repair of Philips EL6416 amplifiers.
  211. GU-19 In priboi
  212. Duncan Amps PSU Designer II
  213. using existing pre with this circuit
  214. Antek AT-070L Specs
  215. Unused tube sections
  216. Rewire Rectifier Sockets for Tube Substitution
  217. Shuguang 300BC
  218. Sn/Pb S-Sn/Cu ...
  219. What and Where is BAF?
  220. CCS plate follower 12bh7 schematic needed pls
  221. 300B DC heaters confusion
  222. Blue Tube Red Plating = Help!
  223. Tube bass preamplifier power supply (Need Help)
  224. Opera Consonance M500 mkii
  225. 6AC7EH Better but different
  226. For that hard to find 5HY 2 amp choke...
  227. Cleaning up an old ST-70 chassis
  228. Accuphase P250 Amplifier Schematic Requred
  229. Pls Help me, this 6C33C pp Schematic is OK?
  230. Loud Noise due to NFB
  231. NAMM Zoo 2011
  232. Recommended O'Scope Reading?
  233. Damage to valve amp when powered up but disconnected to speakers?
  234. preferred resistor type
  235. use more then 'maximum capacitance' after tube rectifier
  236. Headphone Tube Amp D3a
  237. Dared 5.1 tube amp
  238. Designing Transformers with J.C.Maxwell
  239. Cathode resistor calc?
  240. Selector switch question
  241. good circuit to use with Grounded Grid Pre
  242. JJ KT88 tubes glowing bright yellow.
  243. Transistorised-Tubed-Magnetic Amplifier
  244. ST-35 Tube Brands
  245. Where you buy iron transformer core for DIY audio transformer
  246. Improve this SP-11 HV supply?
  247. More Antek Iron
  248. Edcor Transformer Specs
  249. Volume control resistance question? Step Attenuator?
  250. Minimum space between 6V6 tube in Push-Pull Amp

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