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  1. 6BQ5 UL Curves?
  2. Looking for simple Schematic of 2A3 or 45 or 26 Headphone Amp SE OTL ? anyone ?
  3. 6N1P and 6N6P OTL headphone amp
  4. New Project
  5. Understanding Steve Bench's regulated power supply
  6. Preamp with buffer design
  7. JP200 preamp?
  8. IFI 6SN7 X3 (6N8P-6H8C) Tube Valve Preamp Kit Board from eBay
  9. New Tube Manufacture?
  10. Lowering B+ in PS
  11. Rectifier tube blows
  12. direct coupling
  13. Need some help with these tubes
  14. Edcor GSXE10-8-5K primary Inductance?
  15. My "Red board" chassis
  16. PP EL34
  17. Building something better with a Chinese SE EL34B Amp DIY Kit
  18. Problem with my amp, and I have run out of ideas
  19. Value of coupling caps
  20. Testing 6BQ5 on Hickok I-177B
  21. Stepped Attenuator for AI Modulus IIA
  22. Tubes are beautifully colored....right?
  23. Differential Input for Aikido Amp?
  24. MY BEST OTL PREAMPLIFIER
  25. Valve testing machine
  26. Line stage with 12AU7 and 6CG7 anyone?
  27. MingDa MC845-C or Opera COnsonance Reference 9.9
  28. Lower gain 12AX7?
  29. Needed: schematic for Ming Da MC34ab
  30. Solid State Cathodyne Phase Splitter Device?
  31. My Wave Isn't Square.
  32. 6J7 driver in WE91 like amplifier
  33. F2a - C3m Monkey
  34. balanced/unbalanced questions decision time
  35. Stern's saville double 6
  36. GM70 psu transformer.
  37. Antek toroidal vs Edcor?
  38. current production pentode, I_a ~ 8mA
  39. Brook 10c clone
  40. Unknown lamps need help
  41. What's wrong with this?
  42. Microphonics from C0G Caps across Heaters
  43. Yarland FV34CIII vs Synthesis Nimis
  44. 12AT7 and TDA1543...
  45. Eico Hf-81 Integrated Amplifier
  46. Tubed voltage regulator for KT88se amp, need help ?
  47. 1st post what can i build with this?
  48. CJ PV-3 voltage values for schematic
  49. How to analyze square waves?
  50. From KT90 to KT88
  51. side by side bifilar windings in excess of 1000 volts
  52. looking for a great tube amp book.
  53. Revox G36 Mod for preamp
  54. 33 in triode mode...any experience ?
  55. Help with Decware Zen EL84 SET
  56. Find schematic of amplifier mcintosh mc 275 mkiv
  57. Heater wiring - Coaxial?
  58. now mono blocks!
  59. Heathkit AA-40 or AA-121
  60. UTC o-9 ouncers for headphone amp?
  61. Help modify 6H30 Mu-follower stage
  62. Help me to identify unknown tube
  63. Valve Compressor Circuit
  64. Should I rebuild my Eico 950 Cap Tester?
  65. Choke orientation (Need help)
  66. push pull 813 tube in ultra linear mode
  67. AD1865 DAC + 6SN7 analogue stage
  68. Inexpensive tube amplifier kits?
  69. SET amp/speaker issue.
  70. No pre-Amp - Pre Amp
  71. Found a CHEAP source of output transformers in Europe
  72. How calculate cathode LEDs biased
  73. ESR test for tube amps ?
  74. asking help/knowledge asked: luxman d105u output stage
  75. Have you ever seen a 4 pin blue Alps pot??? need help
  76. Any ideas on this one???
  77. Why not 6C41C used in OTL??
  78. 6p14p(EL84) SE with 6n6p build jurnal
  79. Oscilloscope - Which one should I get ? What to look for?
  80. "Jonokuchi" - new desktop amp, or "Little red board"?
  81. Robust Driver stage recommendations
  82. Wireless World valve articles from the past
  83. Overshoot and Ringing
  84. B&K Tube Tester
  85. Harman Kardon A50K
  86. HiFi Tube amp project
  87. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  88. Tone control - good diagram needed
  89. Dolby AC3 coming on nicely.
  90. Power Supply Question
  91. Dynatuner FM-1 Restoration
  92. faulty audioromy 6550 no output and very faith sound please help
  93. just one tube preamp or driver
  94. Power triode preamp a different way
  95. 49.95 Tube amp?!
  96. Which cap for the Musical Machine?
  97. How much power do I need in the kitchen?
  98. 1Gohm or higher resistor ...
  99. Grounding check for SE 300B amp
  100. Suggest me a build for HD600 headphones
  101. 6BQ5 Screen Voltage Regulator
  102. 6SN7 Tubes
  103. My first tube Amplifier VT4C DIY record
  104. Amplifier output wattage test
  105. Troubble shooting help please.....
  106. Heater Wiring
  107. 220/110 step down in reverse ... and more
  108. Input Level Devil please help
  109. Soft start for a preamp?
  110. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  111. Using one KT77 and one EL34 per side?
  112. Help identifying transformer wires.
  113. tube pre and tube power amp
  114. Spice Models for Tubes w Screen Grid by Gurski
  115. Theremin project needs some help!
  116. Transformer abuse or other use
  117. aikido heater voltage
  118. HY51Z datasheet, help !!!
  119. 6L6 amp with unique phase splitter - check my math
  120. Dynaco A451 Output Transformer
  121. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  122. 6AU6 preamp problem
  123. Help identifying a Telefunken(?) tube...
  124. UCC85 and e-pay
  125. Lundahl LL1676 - missing data
  126. valve phono pre-amp HELP needed
  127. Preamp pcb
  128. Strange Problem In Tube Amp Build
  129. Output transformer question
  130. Replacing ECL86/6GW8 to PCL86(14GW8)???
  131. On or Off?
  132. Neg-Feedback into Grid of gain stage instead of cathode?
  133. Accuphase F-25 Japanese manual translation help!
  134. Negative supply with CT tranny
  135. E130L SE again
  136. tony builds a 7N7 preamp
  137. Tango 10429 78% Nickle Output Transformer?
  138. Bias for Ipod Input
  139. What about this driver????
  140. allen organ amp 75
  141. Needs help Tubezone Poseidon
  142. Lightbulb trick on filament circuit?
  143. AMC CVT3030a Help for repair
  144. TF110-48/UL in the UK?
  145. hum in pas2
  146. Aikido Cathode Follwer Question
  147. Fuses...what's the deal?
  148. Question Regarding a Partial Feedback 807 SE
  149. Leftover transformers
  150. Newbie "In Search of help"
  151. ELL80/ECLL800 Cathode follower
  152. The "Tube" bookshelf
  153. knight KG-240? low output help
  154. Vacuum tube VCO
  155. JE lab 2a3 , fizzy, squeal in one channel, help
  156. Trouble with a DIY EL34 Tube Amp Kit
  157. SPICE Transformer Model Spreadsheet
  158. Choosing the right triode as a Phase Inverter
  159. toob noob with GE 5670 and I'd like to do something with it. Help?
  160. my first tube amp, no tubes...
  161. Enough heat to power my CD player...
  162. My first tube amp: 6C33C
  163. S5 16LS kit as a first DIY tube build?
  164. lady day we 91 psu mod help
  165. On days like these ...
  166. The Magnetron - A Low Noise, Long Life Amplifier????
  167. 6M11's
  168. DC coupled 300B idea - request for comments
  169. Fisher bias
  170. How does anode voltage swing to twice HT voltage?
  171. Can a 7625 Ceramic Planar Triode be soldered ?
  172. AMI "DD" Project: 6L6
  173. Plate loading questions
  174. EZ81 rectifier
  175. PY500a
  176. Tube Regulator Thoughts?
  177. Fully balanced from cartridge to loudspeaker - a little help needed!
  178. OPT on the speaker side?
  179. tube circuit conversions?
  180. Current inrush limiter suggestions
  181. Repair of Philips EL6416 amplifiers.
  182. GU-19 In priboi
  183. Duncan Amps PSU Designer II
  184. using existing pre with this circuit
  185. Antek AT-070L Specs
  186. Unused tube sections
  187. Rewire Rectifier Sockets for Tube Substitution
  188. Shuguang 300BC
  189. Sn/Pb S-Sn/Cu ...
  190. What and Where is BAF?
  191. CCS plate follower 12bh7 schematic needed pls
  192. 300B DC heaters confusion
  193. Blue Tube Red Plating = Help!
  194. Tube bass preamplifier power supply (Need Help)
  195. Opera Consonance M500 mkii
  196. 6AC7EH Better but different
  197. For that hard to find 5HY 2 amp choke...
  198. Cleaning up an old ST-70 chassis
  199. Accuphase P250 Amplifier Schematic Requred
  200. Pls Help me, this 6C33C pp Schematic is OK?
  201. Loud Noise due to NFB
  202. NAMM Zoo 2011
  203. Recommended O'Scope Reading?
  204. Damage to valve amp when powered up but disconnected to speakers?
  205. preferred resistor type
  206. use more then 'maximum capacitance' after tube rectifier
  207. Headphone Tube Amp D3a
  208. Dared 5.1 tube amp
  209. Designing Transformers with J.C.Maxwell
  210. Cathode resistor calc?
  211. Selector switch question
  212. good circuit to use with Grounded Grid Pre
  213. JJ KT88 tubes glowing bright yellow.
  214. Transistorised-Tubed-Magnetic Amplifier
  215. ST-35 Tube Brands
  216. Where you buy iron transformer core for DIY audio transformer
  217. Improve this SP-11 HV supply?
  218. More Antek Iron
  219. Edcor Transformer Specs
  220. Volume control resistance question? Step Attenuator?
  221. Minimum space between 6V6 tube in Push-Pull Amp
  222. GE Jan 6550a for SET amp?
  223. Chassis mount connector strip
  224. Transformer winding - mysterious!
  225. can anyone identify theses OT markings?
  226. Excessive hum with 1960's amp.
  227. Western Electric/Hickock 600A
  228. Pete Millett Uniamp
  229. cathode resistor sudden rising value on 7591
  230. 7591 cathode resistor unstable
  231. David
  232. Looking for a DHT Pre & Phono design / ideas please
  233. Hi, New member just bought k272a kit from Oatley
  234. Building an amp from scratch - what features would i want
  235. Lafayette LA215 voltage problem !
  236. 12ax7: How to maximize output?
  237. Low voltage tube pre-amp for T-amp
  238. Hybride bipolair amp
  239. Single end amp power supply upgrade
  240. Pentode curves - how to find operating point withoud going crazy?
  241. 6922 into 6H30 socket ?
  242. Headwize 6N1P OTL headphone amp having hum
  243. Need help to calculate R in a CCS!
  244. #40-LL1660-4*2A3
  245. Help with stereo tube amp design from parts
  246. Decoupling cap hum
  247. Plate chokes
  248. Tube output protection
  249. 12EN6 in triode mode...fine ???
  250. used 12at7

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