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  1. B&K Tube Tester
  2. Harman Kardon A50K
  3. HiFi Tube amp project
  4. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  5. Tone control - good diagram needed
  6. Pentron tube microphone mixer/preamp
  7. Dolby AC3 coming on nicely.
  8. Power Supply Question
  9. Dynatuner FM-1 Restoration
  10. faulty audioromy 6550 no output and very faith sound please help
  11. just one tube preamp or driver
  12. Power triode preamp a different way
  13. 49.95 Tube amp?!
  14. Which cap for the Musical Machine?
  15. How much power do I need in the kitchen?
  16. 1Gohm or higher resistor ...
  17. Grounding check for SE 300B amp
  18. Suggest me a build for HD600 headphones
  19. 6BQ5 Screen Voltage Regulator
  20. 6SN7 Tubes
  21. My first tube Amplifier VT4C DIY record
  22. Amplifier output wattage test
  23. Troubble shooting help please.....
  24. Heater Wiring
  25. 220/110 step down in reverse ... and more
  26. Input Level Devil please help
  27. Soft start for a preamp?
  28. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  29. Using one KT77 and one EL34 per side?
  30. Help identifying transformer wires.
  31. tube pre and tube power amp
  32. Spice Models for Tubes w Screen Grid by Gurski
  33. Theremin project needs some help!
  34. Transformer abuse or other use
  35. aikido heater voltage
  36. HY51Z datasheet, help !!!
  37. 6L6 amp with unique phase splitter - check my math
  38. Dynaco A451 Output Transformer
  39. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  40. 6AU6 preamp problem
  41. Help identifying a Telefunken(?) tube...
  42. UCC85 and e-pay
  43. Lundahl LL1676 - missing data
  44. valve phono pre-amp HELP needed
  45. Preamp pcb
  46. ECL82 pp guitar amp project
  47. Strange Problem In Tube Amp Build
  48. Output transformer question
  49. Replacing ECL86/6GW8 to PCL86(14GW8)???
  50. On or Off?
  51. Neg-Feedback into Grid of gain stage instead of cathode?
  52. Accuphase F-25 Japanese manual translation help!
  53. Negative supply with CT tranny
  54. E130L SE again
  55. tony builds a 7N7 preamp
  56. Tango 10429 78% Nickle Output Transformer?
  57. Bias for Ipod Input
  58. What about this driver????
  59. allen organ amp 75
  60. Needs help Tubezone Poseidon
  61. Lightbulb trick on filament circuit?
  62. AMC CVT3030a Help for repair
  63. TF110-48/UL in the UK?
  64. hum in pas2
  65. Aikido Cathode Follwer Question
  66. 12AX7 tube preamplifier for bass guitar (Need help)
  67. Fuses...what's the deal?
  68. Question Regarding a Partial Feedback 807 SE
  69. Preamp issue on Fender Blues Jr.
  70. Leftover transformers
  71. Newbie "In Search of help"
  72. ELL80/ECLL800 Cathode follower
  73. The "Tube" bookshelf
  74. knight KG-240? low output help
  75. Reverb trouble-Schematic reading help needed
  76. Vacuum tube VCO
  77. JE lab 2a3 , fizzy, squeal in one channel, help
  78. Trouble with a DIY EL34 Tube Amp Kit
  79. SPICE Transformer Model Spreadsheet
  80. Choosing the right triode as a Phase Inverter
  81. toob noob with GE 5670 and I'd like to do something with it. Help?
  82. my first tube amp, no tubes...
  83. Enough heat to power my CD player...
  84. My first tube amp: 6C33C
  85. S5 16LS kit as a first DIY tube build?
  86. lady day we 91 psu mod help
  87. On days like these ...
  88. The Magnetron - A Low Noise, Long Life Amplifier????
  89. 6M11's
  90. DC coupled 300B idea - request for comments
  91. Fisher bias
  92. How does anode voltage swing to twice HT voltage?
  93. Can a 7625 Ceramic Planar Triode be soldered ?
  94. AMI "DD" Project: 6L6
  95. Plate loading questions
  96. EZ81 rectifier
  97. PY500a
  98. Tube Regulator Thoughts?
  99. Fully balanced from cartridge to loudspeaker - a little help needed!
  100. OPT on the speaker side?
  101. tube circuit conversions?
  102. Current inrush limiter suggestions
  103. Repair of Philips EL6416 amplifiers.
  104. GU-19 In priboi
  105. Duncan Amps PSU Designer II
  106. Troubleshoot help for vibrato type problem
  107. using existing pre with this circuit
  108. Laney Tube Fusion 200 series 2 footswitch
  109. Antek AT-070L Specs
  110. Unused tube sections
  111. Rewire Rectifier Sockets for Tube Substitution
  112. Shuguang 300BC
  113. Sn/Pb S-Sn/Cu ...
  114. What and Where is BAF?
  115. CCS plate follower 12bh7 schematic needed pls
  116. 300B DC heaters confusion
  117. Blue Tube Red Plating = Help!
  118. Tube bass preamplifier power supply (Need Help)
  119. Opera Consonance M500 mkii
  120. 6AC7EH Better but different
  121. For that hard to find 5HY 2 amp choke...
  122. Cleaning up an old ST-70 chassis
  123. Accuphase P250 Amplifier Schematic Requred
  124. Pls Help me, this 6C33C pp Schematic is OK?
  125. Loud Noise due to NFB
  126. NAMM Zoo 2011
  127. Recommended O'Scope Reading?
  128. Damage to valve amp when powered up but disconnected to speakers?
  129. preferred resistor type
  130. use more then 'maximum capacitance' after tube rectifier
  131. Headphone Tube Amp D3a
  132. Dared 5.1 tube amp
  133. Designing Transformers with J.C.Maxwell
  134. Cathode resistor calc?
  135. Selector switch question
  136. good circuit to use with Grounded Grid Pre
  137. JJ KT88 tubes glowing bright yellow.
  138. Transistorised-Tubed-Magnetic Amplifier
  139. ST-35 Tube Brands
  140. Where you buy iron transformer core for DIY audio transformer
  141. Improve this SP-11 HV supply?
  142. More Antek Iron
  143. Edcor Transformer Specs
  144. Volume control resistance question? Step Attenuator?
  145. Minimum space between 6V6 tube in Push-Pull Amp
  146. GE Jan 6550a for SET amp?
  147. Chassis mount connector strip
  148. Transformer winding - mysterious!
  149. can anyone identify theses OT markings?
  150. Excessive hum with 1960's amp.
  151. Western Electric/Hickock 600A
  152. Pete Millett Uniamp
  153. cathode resistor sudden rising value on 7591
  154. 7591 cathode resistor unstable
  155. David
  156. Looking for a DHT Pre & Phono design / ideas please
  157. Hi, New member just bought k272a kit from Oatley
  158. Building an amp from scratch - what features would i want
  159. Lafayette LA215 voltage problem !
  160. 12ax7: How to maximize output?
  161. Low voltage tube pre-amp for T-amp
  162. Hybride bipolair amp
  163. Single end amp power supply upgrade
  164. Pentode curves - how to find operating point withoud going crazy?
  165. 6922 into 6H30 socket ?
  166. Headwize 6N1P OTL headphone amp having hum
  167. Need help to calculate R in a CCS!
  168. #40-LL1660-4*2A3
  169. Help with stereo tube amp design from parts
  170. Decoupling cap hum
  171. Plate chokes
  172. Tube output protection
  173. 12EN6 in triode mode...fine ???
  174. used 12at7
  175. Need advise with NFB loop
  176. 1964 Amplifier!!
  177. Very basic grid question????
  178. 12AX7 PULSE
  179. short article about operating points
  180. How is an amp's output measured?
  181. current/cathode feedback
  182. 6N23P, transistor PP hybrid amp project.
  183. Transformer choice for DC heater supply?
  184. Help me with i177 tubetester
  185. HeathKit Euw-15 Tube power Supply failure.
  186. Got unknown tube preamp board, need help!
  187. Ergo-Ella + Budget AVC Do-It-Box
  188. Phono pre amp question.
  189. Zener regulation for fixed-bias supply
  190. hot transformer
  191. H. H. Scott 299C output transformers
  192. decisions fostex and the DIY-K12G budget system..
  193. LTSpice GU19 GU29 6R3S
  194. power transfo as HT choke
  195. Dummy newb needs help with Bogen VP17X
  196. Modding the SAKUA AV200
  197. Anybody use 841s(VT-51)?
  198. Help me make use of these transformers
  199. Wiring Buck Transformer with GE transformer Help!
  200. audio research sp9
  201. WE417A Valve Preamplifier
  202. Hi-Fi Tube Amplifier and more
  203. Radford SC-22 Restoration - Input Transistor Biasing Question
  204. Tube Tester
  205. Looking for off-the-wall oil caps
  206. 805 MonoBlock SE Amp Kit?
  207. Back to back toroids
  208. 6AU6 in CCS circuits
  209. Morgan Jones' RIAA Pre-Amp
  210. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  211. Building an Aikido LV for a headphone amp
  212. What to do with a 6L6-GC?
  213. loose plate caps, hi temp glue???
  214. Power supply question
  215. RCA Line Input Shielding Technique Help
  216. Randall shutting down
  217. Grommes 260A DIY report, questions, suggestions
  218. Line out from tube organ
  219. Minimum Gain Stage Rg Value?
  220. One-half 6H30
  221. Novice In Over His Head
  222. Twisted Heater Wires
  223. Guitar amplifier PSU hum woes
  224. Little Dot MK III - noisy / oscillation?
  225. Rundmaus at work - PP1C without sand
  226. Power transformer for Firefly Amp?
  227. where to start? 2 channel SS/tube bass preamp
  228. mr liang 845
  229. RH84 (EL84) Choke etc...
  230. Gyrator Loaded 12b4A: The Latest Version.
  231. Wood Trimmed Chassis
  232. Sansui BA-303
  233. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  234. hybrid amp with dht or idht inputs?
  235. Balanced to Unbalanced Line Conversion
  236. Headphone amplifier with TH100 tube
  237. Happy New Year - A New Amp to Argue About...
  238. fee-nix, the desktop amp
  239. Any thoughts on what damage I did?
  240. So. Cal. Ham Festival?
  241. zener LTSpice model
  242. Mini-console Schematic
  243. Will this circuit work Ok?
  244. tube CCS below cathodes, startup issues?
  245. Why the wimpy 300B operating points?
  246. can a cathode follower drive a tone stack and an effects loop?
  247. Bench supply ideas
  248. A Newbie Tx Question
  249. Volume Control Help!
  250. Could anyone opine on this circuit?

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