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  1. Transformer abuse or other use
  2. aikido heater voltage
  3. HY51Z datasheet, help !!!
  4. 6L6 amp with unique phase splitter - check my math
  5. Dynaco A451 Output Transformer
  6. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  7. 6AU6 preamp problem
  8. Help identifying a Telefunken(?) tube...
  9. UCC85 and e-pay
  10. Lundahl LL1676 - missing data
  11. valve phono pre-amp HELP needed
  12. Preamp pcb
  13. ECL82 pp guitar amp project
  14. Strange Problem In Tube Amp Build
  15. Output transformer question
  16. Replacing ECL86/6GW8 to PCL86(14GW8)???
  17. On or Off?
  18. Neg-Feedback into Grid of gain stage instead of cathode?
  19. Accuphase F-25 Japanese manual translation help!
  20. Negative supply with CT tranny
  21. E130L SE again
  22. tony builds a 7N7 preamp
  23. Tango 10429 78% Nickle Output Transformer?
  24. Bias for Ipod Input
  25. What about this driver????
  26. allen organ amp 75
  27. Needs help Tubezone Poseidon
  28. Lightbulb trick on filament circuit?
  29. AMC CVT3030a Help for repair
  30. TF110-48/UL in the UK?
  31. hum in pas2
  32. Aikido Cathode Follwer Question
  33. 12AX7 tube preamplifier for bass guitar (Need help)
  34. Fuses...what's the deal?
  35. Question Regarding a Partial Feedback 807 SE
  36. Preamp issue on Fender Blues Jr.
  37. Leftover transformers
  38. Newbie "In Search of help"
  39. ELL80/ECLL800 Cathode follower
  40. The "Tube" bookshelf
  41. knight KG-240? low output help
  42. Reverb trouble-Schematic reading help needed
  43. Vacuum tube VCO
  44. JE lab 2a3 , fizzy, squeal in one channel, help
  45. Trouble with a DIY EL34 Tube Amp Kit
  46. SPICE Transformer Model Spreadsheet
  47. Choosing the right triode as a Phase Inverter
  48. toob noob with GE 5670 and I'd like to do something with it. Help?
  49. my first tube amp, no tubes...
  50. Enough heat to power my CD player...
  51. My first tube amp: 6C33C
  52. S5 16LS kit as a first DIY tube build?
  53. lady day we 91 psu mod help
  54. On days like these ...
  55. The Magnetron - A Low Noise, Long Life Amplifier????
  56. 6M11's
  57. DC coupled 300B idea - request for comments
  58. Fisher bias
  59. How does anode voltage swing to twice HT voltage?
  60. Can a 7625 Ceramic Planar Triode be soldered ?
  61. AMI "DD" Project: 6L6
  62. Plate loading questions
  63. EZ81 rectifier
  64. PY500a
  65. Tube Regulator Thoughts?
  66. Fully balanced from cartridge to loudspeaker - a little help needed!
  67. OPT on the speaker side?
  68. tube circuit conversions?
  69. Current inrush limiter suggestions
  70. Repair of Philips EL6416 amplifiers.
  71. GU-19 In priboi
  72. Duncan Amps PSU Designer II
  73. Troubleshoot help for vibrato type problem
  74. using existing pre with this circuit
  75. Laney Tube Fusion 200 series 2 footswitch
  76. Antek AT-070L Specs
  77. Unused tube sections
  78. Rewire Rectifier Sockets for Tube Substitution
  79. Shuguang 300BC
  80. Sn/Pb S-Sn/Cu ...
  81. What and Where is BAF?
  82. CCS plate follower 12bh7 schematic needed pls
  83. 300B DC heaters confusion
  84. Blue Tube Red Plating = Help!
  85. Tube bass preamplifier power supply (Need Help)
  86. Opera Consonance M500 mkii
  87. 6AC7EH Better but different
  88. For that hard to find 5HY 2 amp choke...
  89. Cleaning up an old ST-70 chassis
  90. Accuphase P250 Amplifier Schematic Requred
  91. Pls Help me, this 6C33C pp Schematic is OK?
  92. Loud Noise due to NFB
  93. NAMM Zoo 2011
  94. Recommended O'Scope Reading?
  95. Damage to valve amp when powered up but disconnected to speakers?
  96. preferred resistor type
  97. use more then 'maximum capacitance' after tube rectifier
  98. Headphone Tube Amp D3a
  99. Dared 5.1 tube amp
  100. Designing Transformers with J.C.Maxwell
  101. Cathode resistor calc?
  102. Selector switch question
  103. good circuit to use with Grounded Grid Pre
  104. JJ KT88 tubes glowing bright yellow.
  105. Transistorised-Tubed-Magnetic Amplifier
  106. ST-35 Tube Brands
  107. Where you buy iron transformer core for DIY audio transformer
  108. Improve this SP-11 HV supply?
  109. More Antek Iron
  110. Edcor Transformer Specs
  111. Volume control resistance question? Step Attenuator?
  112. Minimum space between 6V6 tube in Push-Pull Amp
  113. GE Jan 6550a for SET amp?
  114. Chassis mount connector strip
  115. Transformer winding - mysterious!
  116. can anyone identify theses OT markings?
  117. Excessive hum with 1960's amp.
  118. Western Electric/Hickock 600A
  119. Pete Millett Uniamp
  120. cathode resistor sudden rising value on 7591
  121. 7591 cathode resistor unstable
  122. David
  123. Looking for a DHT Pre & Phono design / ideas please
  124. Hi, New member just bought k272a kit from Oatley
  125. Building an amp from scratch - what features would i want
  126. Lafayette LA215 voltage problem !
  127. 12ax7: How to maximize output?
  128. Low voltage tube pre-amp for T-amp
  129. Hybride bipolair amp
  130. Single end amp power supply upgrade
  131. Pentode curves - how to find operating point withoud going crazy?
  132. 6922 into 6H30 socket ?
  133. Headwize 6N1P OTL headphone amp having hum
  134. Need help to calculate R in a CCS!
  135. #40-LL1660-4*2A3
  136. Help with stereo tube amp design from parts
  137. Decoupling cap hum
  138. Plate chokes
  139. Tube output protection
  140. 12EN6 in triode mode...fine ???
  141. used 12at7
  142. Need advise with NFB loop
  143. 1964 Amplifier!!
  144. Very basic grid question????
  145. 12AX7 PULSE
  146. short article about operating points
  147. How is an amp's output measured?
  148. current/cathode feedback
  149. 6N23P, transistor PP hybrid amp project.
  150. Transformer choice for DC heater supply?
  151. Help me with i177 tubetester
  152. HeathKit Euw-15 Tube power Supply failure.
  153. Got unknown tube preamp board, need help!
  154. Ergo-Ella + Budget AVC Do-It-Box
  155. Phono pre amp question.
  156. Zener regulation for fixed-bias supply
  157. hot transformer
  158. H. H. Scott 299C output transformers
  159. decisions fostex and the DIY-K12G budget system..
  160. LTSpice GU19 GU29 6R3S
  161. power transfo as HT choke
  162. Dummy newb needs help with Bogen VP17X
  163. Modding the SAKUA AV200
  164. Anybody use 841s(VT-51)?
  165. Help me make use of these transformers
  166. Wiring Buck Transformer with GE transformer Help!
  167. audio research sp9
  168. WE417A Valve Preamplifier
  169. Hi-Fi Tube Amplifier and more
  170. Radford SC-22 Restoration - Input Transistor Biasing Question
  171. Tube Tester
  172. Looking for off-the-wall oil caps
  173. 805 MonoBlock SE Amp Kit?
  174. Back to back toroids
  175. 6AU6 in CCS circuits
  176. Morgan Jones' RIAA Pre-Amp
  177. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?
  178. Building an Aikido LV for a headphone amp
  179. What to do with a 6L6-GC?
  180. loose plate caps, hi temp glue???
  181. Power supply question
  182. RCA Line Input Shielding Technique Help
  183. Randall shutting down
  184. Grommes 260A DIY report, questions, suggestions
  185. Line out from tube organ
  186. Minimum Gain Stage Rg Value?
  187. One-half 6H30
  188. Novice In Over His Head
  189. Twisted Heater Wires
  190. Guitar amplifier PSU hum woes
  191. Little Dot MK III - noisy / oscillation?
  192. Rundmaus at work - PP1C without sand
  193. Power transformer for Firefly Amp?
  194. where to start? 2 channel SS/tube bass preamp
  195. mr liang 845
  196. RH84 (EL84) Choke etc...
  197. Gyrator Loaded 12b4A: The Latest Version.
  198. Wood Trimmed Chassis
  199. Sansui BA-303
  200. Stepped Attenuator - Ebay Seiden DACT Goldpoint Elma Shallco?
  201. hybrid amp with dht or idht inputs?
  202. Balanced to Unbalanced Line Conversion
  203. Headphone amplifier with TH100 tube
  204. Happy New Year - A New Amp to Argue About...
  205. fee-nix, the desktop amp
  206. Any thoughts on what damage I did?
  207. So. Cal. Ham Festival?
  208. zener LTSpice model
  209. Mini-console Schematic
  210. Will this circuit work Ok?
  211. tube CCS below cathodes, startup issues?
  212. Why the wimpy 300B operating points?
  213. can a cathode follower drive a tone stack and an effects loop?
  214. Bench supply ideas
  215. A Newbie Tx Question
  216. Volume Control Help!
  217. Could anyone opine on this circuit?
  218. 5U4 Rectifier. Maximum filter cap value?
  219. Grounding outputs?
  220. Happy holidays folks.
  221. Thermionic diode
  222. Lafayette amp arcing Rectifier problem
  223. ECF801 any good for audio
  224. Harman Kardon Citation II PI question
  225. 6N1P
  226. Need advice for a 93 Fender "The Twin"
  227. Shorted secondary windings of transformer
  228. Toasted my rectifier - need some pointers to troubleshoot
  229. Parallel amp connection to speakers, SS + tube
  230. Loose pin on a JJ 300B
  231. Measuring milliamp with Fluke 771 Clamp Meter Question?
  232. Spice - and Sting is nowhere to be seen...
  233. Realistic Stereo 24
  234. 6N3P-EV measured Ia/Va/Vg curves
  235. Anyone have the Meng Mini X1 amp here?
  236. EL84/6SN7 tube amp
  237. Something Like A 6EU7?
  238. Which 845 amp?
  239. another 12ax7 preamp
  240. SOHA v2 cost
  241. Yarland FV34C-111 Valve substitution
  242. My Latest DIY Draft (Beta) Build - Resurrected Sansui AU-111
  243. XiangSheng D-2020-KT88
  244. Edcor vs Electra-Print
  245. adding headphone jack to dynaco pas 3 clone
  246. Revising an old tube preamp section: where to get the knowledge?
  247. 3 Caps parallel to series vs ??? Sonic Performance?
  248. 6CG7 Bias Current?
  249. Output Pentode Screen at half Plate voltage
  250. PP to parallel

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