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  1. MingDa MC845-C or Opera COnsonance Reference 9.9
  2. Lower gain 12AX7?
  3. Needed: schematic for Ming Da MC34ab
  4. 12AX7 high gain guitar amp
  5. Solid State Cathodyne Phase Splitter Device?
  6. My Wave Isn't Square.
  7. 6J7 driver in WE91 like amplifier
  8. F2a - C3m Monkey
  9. balanced/unbalanced questions decision time
  10. Stern's saville double 6
  11. GM70 psu transformer.
  12. Antek toroidal vs Edcor?
  13. current production pentode, I_a ~ 8mA
  14. Brook 10c clone
  15. Unknown lamps need help
  16. What's wrong with this?
  17. Microphonics from C0G Caps across Heaters
  18. Yarland FV34CIII vs Synthesis Nimis
  19. 12AT7 and TDA1543...
  20. Eico Hf-81 Integrated Amplifier
  21. Tubed voltage regulator for KT88se amp, need help ?
  22. 1st post what can i build with this?
  23. CJ PV-3 voltage values for schematic
  24. How to analyze square waves?
  25. From KT90 to KT88
  26. side by side bifilar windings in excess of 1000 volts
  27. looking for a great tube amp book.
  28. Revox G36 Mod for preamp
  29. 33 in triode mode...any experience ?
  30. Help with Decware Zen EL84 SET
  31. Bumblebee Caps
  32. Find schematic of amplifier mcintosh mc 275 mkiv
  33. Heater wiring - Coaxial?
  34. now mono blocks!
  35. Heathkit AA-40 or AA-121
  36. UTC o-9 ouncers for headphone amp?
  37. Help modify 6H30 Mu-follower stage
  38. Help me to identify unknown tube
  39. Valve Compressor Circuit
  40. Should I rebuild my Eico 950 Cap Tester?
  41. Choke orientation (Need help)
  42. push pull 813 tube in ultra linear mode
  43. AD1865 DAC + 6SN7 analogue stage
  44. Inexpensive tube amplifier kits?
  45. SET amp/speaker issue.
  46. No pre-Amp - Pre Amp
  47. Found a CHEAP source of output transformers in Europe
  48. How calculate cathode LEDs biased
  49. ESR test for tube amps ?
  50. Anyone familiar with my 1975 Ampeg SVT
  51. asking help/knowledge asked: luxman d105u output stage
  52. Have you ever seen a 4 pin blue Alps pot??? need help
  53. Any ideas on this one???
  54. first 5f1 build is acting funny :/
  55. '57 twin question
  56. Why not 6C41C used in OTL??
  57. 6p14p(EL84) SE with 6n6p build jurnal
  58. Oscilloscope - Which one should I get ? What to look for?
  59. "Jonokuchi" - new desktop amp, or "Little red board"?
  60. Robust Driver stage recommendations
  61. Wireless World valve articles from the past
  62. Overshoot and Ringing
  63. B&K Tube Tester
  64. Harman Kardon A50K
  65. HiFi Tube amp project
  66. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  67. Tone control - good diagram needed
  68. Pentron tube microphone mixer/preamp
  69. Dolby AC3 coming on nicely.
  70. Power Supply Question
  71. Dynatuner FM-1 Restoration
  72. faulty audioromy 6550 no output and very faith sound please help
  73. just one tube preamp or driver
  74. Power triode preamp a different way
  75. 49.95 Tube amp?!
  76. Which cap for the Musical Machine?
  77. How much power do I need in the kitchen?
  78. 1Gohm or higher resistor ...
  79. Grounding check for SE 300B amp
  80. Suggest me a build for HD600 headphones
  81. 6BQ5 Screen Voltage Regulator
  82. 6SN7 Tubes
  83. My first tube Amplifier VT4C DIY record
  84. Amplifier output wattage test
  85. Troubble shooting help please.....
  86. Heater Wiring
  87. 220/110 step down in reverse ... and more
  88. Input Level Devil please help
  89. Soft start for a preamp?
  90. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  91. Using one KT77 and one EL34 per side?
  92. Help identifying transformer wires.
  93. tube pre and tube power amp
  94. Spice Models for Tubes w Screen Grid by Gurski
  95. Theremin project needs some help!
  96. Transformer abuse or other use
  97. aikido heater voltage
  98. HY51Z datasheet, help !!!
  99. 6L6 amp with unique phase splitter - check my math
  100. Dynaco A451 Output Transformer
  101. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  102. 6AU6 preamp problem
  103. Help identifying a Telefunken(?) tube...
  104. UCC85 and e-pay
  105. Lundahl LL1676 - missing data
  106. valve phono pre-amp HELP needed
  107. Preamp pcb
  108. ECL82 pp guitar amp project
  109. Strange Problem In Tube Amp Build
  110. Output transformer question
  111. Replacing ECL86/6GW8 to PCL86(14GW8)???
  112. On or Off?
  113. Neg-Feedback into Grid of gain stage instead of cathode?
  114. Accuphase F-25 Japanese manual translation help!
  115. Negative supply with CT tranny
  116. E130L SE again
  117. tony builds a 7N7 preamp
  118. Tango 10429 78% Nickle Output Transformer?
  119. Bias for Ipod Input
  120. What about this driver????
  121. allen organ amp 75
  122. Needs help Tubezone Poseidon
  123. Lightbulb trick on filament circuit?
  124. AMC CVT3030a Help for repair
  125. TF110-48/UL in the UK?
  126. hum in pas2
  127. Aikido Cathode Follwer Question
  128. 12AX7 tube preamplifier for bass guitar (Need help)
  129. Fuses...what's the deal?
  130. Question Regarding a Partial Feedback 807 SE
  131. Preamp issue on Fender Blues Jr.
  132. Leftover transformers
  133. Newbie "In Search of help"
  134. ELL80/ECLL800 Cathode follower
  135. The "Tube" bookshelf
  136. knight KG-240? low output help
  137. Reverb trouble-Schematic reading help needed
  138. Vacuum tube VCO
  139. JE lab 2a3 , fizzy, squeal in one channel, help
  140. Trouble with a DIY EL34 Tube Amp Kit
  141. SPICE Transformer Model Spreadsheet
  142. Choosing the right triode as a Phase Inverter
  143. toob noob with GE 5670 and I'd like to do something with it. Help?
  144. my first tube amp, no tubes...
  145. Enough heat to power my CD player...
  146. My first tube amp: 6C33C
  147. S5 16LS kit as a first DIY tube build?
  148. lady day we 91 psu mod help
  149. On days like these ...
  150. The Magnetron - A Low Noise, Long Life Amplifier????
  151. 6M11's
  152. DC coupled 300B idea - request for comments
  153. Fisher bias
  154. How does anode voltage swing to twice HT voltage?
  155. Can a 7625 Ceramic Planar Triode be soldered ?
  156. AMI "DD" Project: 6L6
  157. Plate loading questions
  158. EZ81 rectifier
  159. PY500a
  160. Tube Regulator Thoughts?
  161. Fully balanced from cartridge to loudspeaker - a little help needed!
  162. OPT on the speaker side?
  163. tube circuit conversions?
  164. Current inrush limiter suggestions
  165. Repair of Philips EL6416 amplifiers.
  166. GU-19 In priboi
  167. Duncan Amps PSU Designer II
  168. Troubleshoot help for vibrato type problem
  169. using existing pre with this circuit
  170. Laney Tube Fusion 200 series 2 footswitch
  171. Antek AT-070L Specs
  172. Unused tube sections
  173. Rewire Rectifier Sockets for Tube Substitution
  174. Shuguang 300BC
  175. Sn/Pb S-Sn/Cu ...
  176. What and Where is BAF?
  177. CCS plate follower 12bh7 schematic needed pls
  178. 300B DC heaters confusion
  179. Blue Tube Red Plating = Help!
  180. Tube bass preamplifier power supply (Need Help)
  181. Opera Consonance M500 mkii
  182. 6AC7EH Better but different
  183. For that hard to find 5HY 2 amp choke...
  184. Cleaning up an old ST-70 chassis
  185. Accuphase P250 Amplifier Schematic Requred
  186. Pls Help me, this 6C33C pp Schematic is OK?
  187. Loud Noise due to NFB
  188. NAMM Zoo 2011
  189. Recommended O'Scope Reading?
  190. Damage to valve amp when powered up but disconnected to speakers?
  191. preferred resistor type
  192. use more then 'maximum capacitance' after tube rectifier
  193. Headphone Tube Amp D3a
  194. Dared 5.1 tube amp
  195. Designing Transformers with J.C.Maxwell
  196. Cathode resistor calc?
  197. Selector switch question
  198. good circuit to use with Grounded Grid Pre
  199. JJ KT88 tubes glowing bright yellow.
  200. Transistorised-Tubed-Magnetic Amplifier
  201. ST-35 Tube Brands
  202. Where you buy iron transformer core for DIY audio transformer
  203. Improve this SP-11 HV supply?
  204. More Antek Iron
  205. Edcor Transformer Specs
  206. Volume control resistance question? Step Attenuator?
  207. Minimum space between 6V6 tube in Push-Pull Amp
  208. GE Jan 6550a for SET amp?
  209. Chassis mount connector strip
  210. Transformer winding - mysterious!
  211. can anyone identify theses OT markings?
  212. Excessive hum with 1960's amp.
  213. Western Electric/Hickock 600A
  214. Pete Millett Uniamp
  215. cathode resistor sudden rising value on 7591
  216. 7591 cathode resistor unstable
  217. David
  218. Looking for a DHT Pre & Phono design / ideas please
  219. Hi, New member just bought k272a kit from Oatley
  220. Building an amp from scratch - what features would i want
  221. Lafayette LA215 voltage problem !
  222. 12ax7: How to maximize output?
  223. Low voltage tube pre-amp for T-amp
  224. Hybride bipolair amp
  225. Single end amp power supply upgrade
  226. Pentode curves - how to find operating point withoud going crazy?
  227. 6922 into 6H30 socket ?
  228. Headwize 6N1P OTL headphone amp having hum
  229. Need help to calculate R in a CCS!
  230. #40-LL1660-4*2A3
  231. Help with stereo tube amp design from parts
  232. Decoupling cap hum
  233. Plate chokes
  234. Tube output protection
  235. 12EN6 in triode mode...fine ???
  236. used 12at7
  237. Need advise with NFB loop
  238. 1964 Amplifier!!
  239. Very basic grid question????
  240. 12AX7 PULSE
  241. short article about operating points
  242. How is an amp's output measured?
  243. current/cathode feedback
  244. 6N23P, transistor PP hybrid amp project.
  245. Transformer choice for DC heater supply?
  246. Help me with i177 tubetester
  247. HeathKit Euw-15 Tube power Supply failure.
  248. Got unknown tube preamp board, need help!
  249. Ergo-Ella + Budget AVC Do-It-Box
  250. Phono pre amp question.

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