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  1. CJ PV-3 voltage values for schematic
  2. How to analyze square waves?
  3. From KT90 to KT88
  4. side by side bifilar windings in excess of 1000 volts
  5. looking for a great tube amp book.
  6. Revox G36 Mod for preamp
  7. 33 in triode mode...any experience ?
  8. Help with Decware Zen EL84 SET
  9. Bumblebee Caps
  10. Find schematic of amplifier mcintosh mc 275 mkiv
  11. Heater wiring - Coaxial?
  12. now mono blocks!
  13. Heathkit AA-40 or AA-121
  14. UTC o-9 ouncers for headphone amp?
  15. Help modify 6H30 Mu-follower stage
  16. Help me to identify unknown tube
  17. Valve Compressor Circuit
  18. Should I rebuild my Eico 950 Cap Tester?
  19. Choke orientation (Need help)
  20. push pull 813 tube in ultra linear mode
  21. AD1865 DAC + 6SN7 analogue stage
  22. Inexpensive tube amplifier kits?
  23. SET amp/speaker issue.
  24. No pre-Amp - Pre Amp
  25. Found a CHEAP source of output transformers in Europe
  26. How calculate cathode LEDs biased
  27. ESR test for tube amps ?
  28. Anyone familiar with my 1975 Ampeg SVT
  29. asking help/knowledge asked: luxman d105u output stage
  30. Have you ever seen a 4 pin blue Alps pot??? need help
  31. Any ideas on this one???
  32. first 5f1 build is acting funny :/
  33. '57 twin question
  34. Why not 6C41C used in OTL??
  35. 6p14p(EL84) SE with 6n6p build jurnal
  36. Oscilloscope - Which one should I get ? What to look for?
  37. "Jonokuchi" - new desktop amp, or "Little red board"?
  38. Robust Driver stage recommendations
  39. Wireless World valve articles from the past
  40. Overshoot and Ringing
  41. B&K Tube Tester
  42. Harman Kardon A50K
  43. HiFi Tube amp project
  44. Submitted for your (dis) approval, OTL, Autobias Inv. Futterman
  45. Tone control - good diagram needed
  46. Pentron tube microphone mixer/preamp
  47. Dolby AC3 coming on nicely.
  48. Power Supply Question
  49. Dynatuner FM-1 Restoration
  50. faulty audioromy 6550 no output and very faith sound please help
  51. just one tube preamp or driver
  52. Power triode preamp a different way
  53. 49.95 Tube amp?!
  54. Which cap for the Musical Machine?
  55. How much power do I need in the kitchen?
  56. 1Gohm or higher resistor ...
  57. Grounding check for SE 300B amp
  58. Suggest me a build for HD600 headphones
  59. 6BQ5 Screen Voltage Regulator
  60. 6SN7 Tubes
  61. My first tube Amplifier VT4C DIY record
  62. Amplifier output wattage test
  63. Troubble shooting help please.....
  64. Heater Wiring
  65. 220/110 step down in reverse ... and more
  66. Input Level Devil please help
  67. Soft start for a preamp?
  68. Opinion requested: MingDa MC300 variants versus Consonance Cyber range
  69. Using one KT77 and one EL34 per side?
  70. Help identifying transformer wires.
  71. tube pre and tube power amp
  72. Spice Models for Tubes w Screen Grid by Gurski
  73. Theremin project needs some help!
  74. Transformer abuse or other use
  75. aikido heater voltage
  76. HY51Z datasheet, help !!!
  77. 6L6 amp with unique phase splitter - check my math
  78. Dynaco A451 Output Transformer
  79. my 250 watt tube amp can be a 500 watt tube amp for less than 2 bucks plus tubes
  80. 6AU6 preamp problem
  81. Help identifying a Telefunken(?) tube...
  82. UCC85 and e-pay
  83. Lundahl LL1676 - missing data
  84. valve phono pre-amp HELP needed
  85. Preamp pcb
  86. ECL82 pp guitar amp project
  87. Strange Problem In Tube Amp Build
  88. Output transformer question
  89. Replacing ECL86/6GW8 to PCL86(14GW8)???
  90. On or Off?
  91. Neg-Feedback into Grid of gain stage instead of cathode?
  92. Accuphase F-25 Japanese manual translation help!
  93. Negative supply with CT tranny
  94. E130L SE again
  95. tony builds a 7N7 preamp
  96. Tango 10429 78% Nickle Output Transformer?
  97. Bias for Ipod Input
  98. What about this driver????
  99. allen organ amp 75
  100. Needs help Tubezone Poseidon
  101. Lightbulb trick on filament circuit?
  102. AMC CVT3030a Help for repair
  103. TF110-48/UL in the UK?
  104. hum in pas2
  105. Aikido Cathode Follwer Question
  106. 12AX7 tube preamplifier for bass guitar (Need help)
  107. Fuses...what's the deal?
  108. Question Regarding a Partial Feedback 807 SE
  109. Preamp issue on Fender Blues Jr.
  110. Leftover transformers
  111. Newbie "In Search of help"
  112. ELL80/ECLL800 Cathode follower
  113. The "Tube" bookshelf
  114. knight KG-240? low output help
  115. Reverb trouble-Schematic reading help needed
  116. Vacuum tube VCO
  117. JE lab 2a3 , fizzy, squeal in one channel, help
  118. Trouble with a DIY EL34 Tube Amp Kit
  119. SPICE Transformer Model Spreadsheet
  120. Choosing the right triode as a Phase Inverter
  121. toob noob with GE 5670 and I'd like to do something with it. Help?
  122. my first tube amp, no tubes...
  123. Enough heat to power my CD player...
  124. My first tube amp: 6C33C
  125. S5 16LS kit as a first DIY tube build?
  126. lady day we 91 psu mod help
  127. On days like these ...
  128. The Magnetron - A Low Noise, Long Life Amplifier????
  129. 6M11's
  130. DC coupled 300B idea - request for comments
  131. Fisher bias
  132. How does anode voltage swing to twice HT voltage?
  133. Can a 7625 Ceramic Planar Triode be soldered ?
  134. AMI "DD" Project: 6L6
  135. Plate loading questions
  136. EZ81 rectifier
  137. PY500a
  138. Tube Regulator Thoughts?
  139. Fully balanced from cartridge to loudspeaker - a little help needed!
  140. OPT on the speaker side?
  141. tube circuit conversions?
  142. Current inrush limiter suggestions
  143. Repair of Philips EL6416 amplifiers.
  144. GU-19 In priboi
  145. Duncan Amps PSU Designer II
  146. Troubleshoot help for vibrato type problem
  147. using existing pre with this circuit
  148. Laney Tube Fusion 200 series 2 footswitch
  149. Antek AT-070L Specs
  150. Unused tube sections
  151. Rewire Rectifier Sockets for Tube Substitution
  152. Shuguang 300BC
  153. Sn/Pb S-Sn/Cu ...
  154. What and Where is BAF?
  155. CCS plate follower 12bh7 schematic needed pls
  156. 300B DC heaters confusion
  157. Blue Tube Red Plating = Help!
  158. Tube bass preamplifier power supply (Need Help)
  159. Opera Consonance M500 mkii
  160. 6AC7EH Better but different
  161. For that hard to find 5HY 2 amp choke...
  162. Cleaning up an old ST-70 chassis
  163. Accuphase P250 Amplifier Schematic Requred
  164. Pls Help me, this 6C33C pp Schematic is OK?
  165. Loud Noise due to NFB
  166. NAMM Zoo 2011
  167. Recommended O'Scope Reading?
  168. Damage to valve amp when powered up but disconnected to speakers?
  169. preferred resistor type
  170. use more then 'maximum capacitance' after tube rectifier
  171. Headphone Tube Amp D3a
  172. Dared 5.1 tube amp
  173. Designing Transformers with J.C.Maxwell
  174. Cathode resistor calc?
  175. Selector switch question
  176. good circuit to use with Grounded Grid Pre
  177. JJ KT88 tubes glowing bright yellow.
  178. Transistorised-Tubed-Magnetic Amplifier
  179. ST-35 Tube Brands
  180. Where you buy iron transformer core for DIY audio transformer
  181. Improve this SP-11 HV supply?
  182. More Antek Iron
  183. Edcor Transformer Specs
  184. Volume control resistance question? Step Attenuator?
  185. Minimum space between 6V6 tube in Push-Pull Amp
  186. GE Jan 6550a for SET amp?
  187. Chassis mount connector strip
  188. Transformer winding - mysterious!
  189. can anyone identify theses OT markings?
  190. Excessive hum with 1960's amp.
  191. Western Electric/Hickock 600A
  192. Pete Millett Uniamp
  193. cathode resistor sudden rising value on 7591
  194. 7591 cathode resistor unstable
  195. David
  196. Looking for a DHT Pre & Phono design / ideas please
  197. Hi, New member just bought k272a kit from Oatley
  198. Building an amp from scratch - what features would i want
  199. Lafayette LA215 voltage problem !
  200. 12ax7: How to maximize output?
  201. Low voltage tube pre-amp for T-amp
  202. Hybride bipolair amp
  203. Single end amp power supply upgrade
  204. Pentode curves - how to find operating point withoud going crazy?
  205. 6922 into 6H30 socket ?
  206. Headwize 6N1P OTL headphone amp having hum
  207. Need help to calculate R in a CCS!
  208. #40-LL1660-4*2A3
  209. Help with stereo tube amp design from parts
  210. Decoupling cap hum
  211. Plate chokes
  212. Tube output protection
  213. 12EN6 in triode mode...fine ???
  214. used 12at7
  215. Need advise with NFB loop
  216. 1964 Amplifier!!
  217. Very basic grid question????
  218. 12AX7 PULSE
  219. short article about operating points
  220. How is an amp's output measured?
  221. current/cathode feedback
  222. 6N23P, transistor PP hybrid amp project.
  223. Transformer choice for DC heater supply?
  224. Help me with i177 tubetester
  225. HeathKit Euw-15 Tube power Supply failure.
  226. Got unknown tube preamp board, need help!
  227. Ergo-Ella + Budget AVC Do-It-Box
  228. Phono pre amp question.
  229. Zener regulation for fixed-bias supply
  230. hot transformer
  231. H. H. Scott 299C output transformers
  232. decisions fostex and the DIY-K12G budget system..
  233. LTSpice GU19 GU29 6R3S
  234. power transfo as HT choke
  235. Dummy newb needs help with Bogen VP17X
  236. Modding the SAKUA AV200
  237. Anybody use 841s(VT-51)?
  238. Help me make use of these transformers
  239. Wiring Buck Transformer with GE transformer Help!
  240. audio research sp9
  241. WE417A Valve Preamplifier
  242. Hi-Fi Tube Amplifier and more
  243. Radford SC-22 Restoration - Input Transistor Biasing Question
  244. Tube Tester
  245. Looking for off-the-wall oil caps
  246. 805 MonoBlock SE Amp Kit?
  247. Back to back toroids
  248. 6AU6 in CCS circuits
  249. Morgan Jones' RIAA Pre-Amp
  250. Pre-amp using Hammond 372FX (300-0-300, 5, 6,3) - suggestions?

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