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  1. Building an B-15-inspired amp
  2. China preamp Xiang Sheng 768A
  3. RE: Fisher 200 tube amp fuse blowing issue
  4. How do you match output tubes?
  5. Best Dyna ST-70 rebuild kit?
  6. Help with tube wiring
  7. Decided on Gibson GA 20 need layout drawings etc.
  8. st70 problem
  9. Help with info on old valve amp
  10. Exceeding V-heater-cathode
  11. Cayin/Sparks A- 50T schematic.
  12. Looking for Bi siemens datasheet
  13. Transformers, transformers, transformers...
  14. Need ideas for my 6V6 from 1946 Blues / rockabilly
  15. Quasi complimentary output stage?
  16. 4ohm output transformer with 8ohm speaker
  17. First DIY project for a good power Amplifier
  18. Cherry red plates
  19. DIY triode
  20. First post/build
  21. New Transformer Vendor In Belgium
  22. KT88 grid stopper
  23. Connecting valve shields to earth
  24. Shindo MAZERIS BELLEVUS MODEL 454-2xAttenuator-How works this Circuit? 6067+12BH7
  25. Fixed bias failure B+ switch off protection
  26. Who can tell me where to buy Caddock MS220
  27. Uses for Quicksilver Transformers
  28. SE amp problem
  29. EL-34 to 6P3S-E
  30. 6922 sepp with Balanced Gains
  31. What path to choose for Hamonica amplifier?
  32. tubes for these OPT?, pri 1.75Kohm, sec 2.5, 4, 8ohm, taps 20%, weight 4Kg
  33. Turning a 6.3 V secondary into a 5 V secondary on an Antek 2T350
  34. gridchokes/output caps
  35. Can I build an MC30?
  36. Cathodyne: Can someone please help me fill in the blanks ?
  37. help hovland hp200
  38. 6SL7 and 6AS7 PP amplifier, design advice needed
  39. Project: Baldwin Tube Amp...
  40. Power Supply Input Capacitor - JE simple 45 question
  41. Tube output: Voltage or Current source?
  42. Edcor's new E-store website.....finally!
  43. Help complete the 300B schematic
  44. Confusion about a 5Y3GT rectifier
  45. Need advice on 300B circuit
  46. PCB in components
  47. new 6080 dc pp
  48. Single ended to balanced Aikido with mosfets in buffer position
  49. Simple LED power indicator light circuit?
  50. about 83 mercury rectifier
  51. Aikido Zo Calculation
  52. Line out issue - 1965 Ampeg B-18-N
  53. Pavane/ Psvane 845, 805, 211, 12AX7, 12AU7, 12AT7 and EL84
  54. Is this Telefunken fake or OEM?
  55. About Hmmmmm
  56. PRE-AMP PROJECT SRPP + HEADPHONE AMP
  57. 6BN11 vs 6CB6
  58. Is output stage local feedback necessary?
  59. Tube Longevity
  60. Power triode drive current requirements
  61. OPT Selection Question
  62. Recommend me a 6V6 P-P schematic
  63. Requesting advice on a pre-amp build. I'm working on asking realistic questions.
  64. So, im going to replace the Alps with a PEC...someone help?
  65. 13e1 se "shade" some questions
  66. Pio russian capacitor K42-11...is good ?
  67. My first build VTA ST-120
  68. World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
  69. DIY 50C5 mini amp...
  70. So you think you have cool tubes?????
  71. Layout
  72. Looking to ID this amp
  73. Help me to make tube amply
  74. CAT SL1 SIGNATURE schematik phono
  75. Have anyone built this 6V6 amp?
  76. GU-50 in Single-Ended Triode Configuration - What bias points?
  77. DC coupling on a LTP? Opinions and help needed on Fred's design.
  78. Power Selection - Help Needed
  79. Which speaker with a 1/4W tube amp?
  80. 6973 VS 6CZ5 substitute
  81. Third Reich tubes
  82. Hello...and another ST-70 project.
  83. Home theater magic smoke...smoked and I think I heard a mirror crack...
  84. Scott LK48-B restoration
  85. 3 - 12AU7 Preamp. Is there such an animal?
  86. 300b filament
  87. resistor 880 ohms cathode
  88. Anyone have a Bugle Boy logo
  89. Change of circuit from triode to tetrode
  90. Need upgrade info for my Atma-Sphere Novacron Amps
  91. Whats Vintage Testing Equipment Do YOU Have/Use?
  92. JJ Kt77 Bias?
  93. tube rectified psu
  94. HELP!: my SET amp was turned off without a load and now it sound veiled!
  95. 5842 grid leak
  96. AMI Jukebox speaker impedence question
  97. Advice Needed: "Flabby" Amp Low-End
  98. Aikido transformer coupled output
  99. Audio measurements on tube amp. ? look here
  100. 12BH7A driver stage help
  101. Audio drive to g2 connected to g1 via 15K0
  102. KT88 SE Complete Kit
  103. Any high-end 6BM8 push pull tube amp schematic ?
  104. How a Triode Works
  105. EL3N substitute
  106. Magnavox AMP-185
  107. Best 6V6G that won't get me divorced..
  108. Shorted EL34 ?
  109. ARC VS60 hum in speaker
  110. Need help for a bias circuit
  111. Eico HF20 Output Txr Questions
  112. A Radford STA15 restoration story
  113. Tube Testing in DC Area
  114. Thorens PR24
  115. Newbie here with a couple questions
  116. 300B SwitchMode filament supply
  117. Mixed bias for balancing unmatched tubes in PPP?
  118. My First DIY Experience: An Aikido/Tetra Preamp
  119. how to test chokes for current and voltage
  120. pictures miniblok 1 and miniblok 2 by fred nachbaur
  121. Help with Aikido Preamp+class d amp
  122. will a PTX without center tap work?
  123. Anyone have information on 300B silvertone tube
  124. 6P14P push pull with low output
  125. passive 30Hz-20kHz Bandpass filter for tube preamp?
  126. My First Amp
  127. Frank's 6sn7 preamp
  128. My new 300B Amp
  129. help troubleshooting gradually distorting tube amp (dropping b+ voltage when hot)
  130. Tube Gear Supply/Surplus in Houston Area
  131. What 2a3 ?
  132. long tailed pair - need more gain
  133. how to bypass the volume pot on my SET amp?
  134. 2 stage AIKIDO
  135. Guys please help me with my Jolida 102B!
  136. Philbrick GAP/R K2-W question
  137. First time baby Huey amplifier build
  138. 6LB6's....
  139. LMG Capacitor
  140. Meng 6PI Biasing Question
  141. AIKIDO LV WON'T START
  142. Under rating of Vertical Sweep Tubes
  143. Simple 845 tube monoblock design
  144. Running on filament only
  145. soft stat
  146. BJT Bias?
  147. Preamp Squeal
  148. Hammond L101 compensation cap
  149. Powering a headphone amplifier with DC filament supply
  150. new to this
  151. miniblok 1 voltage problem
  152. How will this affect my amp?
  153. Tetra Phono Builders...got problems!
  154. yagoolar's tube amp projects
  155. Base material of GEC KT88 Feb 1960
  156. Headphone amp with 6n2p valve on 12V
  157. pcc189 for audio use
  158. Reading material
  159. 2A3 rectifier
  160. help calibrating a mercury model 1000 tube tester
  161. 866a valve test
  162. Anybody in the Knoxville area?
  163. Looking for simple Push-Pull tricks (from Baby Huey) #1
  164. Why wire an output transformer as autoformer ? (parafeed)
  165. Measuring unwanted grid current
  166. Tube companies
  167. heathkit a7???guitar amp
  168. Hi Performance Pre amp
  169. HH Scott Type 209 Amp
  170. 6l6gb PP w/fixed bias?
  171. Holy cow! Can anyone tell me why this wire is so pricey?
  172. EL34B 6N9P 5Z3P amplifier kit - any thoughts on schematic?
  173. 4 x EL84 in UL PP, 470 B+!! is this right
  174. What amp is this?
  175. PS Setup For Testing
  176. OTL designed by Tim Mellow with 4 6C33C?
  177. Bassman 100 schematic questions
  178. Quick question on this schematic
  179. Variac, how to ?
  180. Tube data sheets - inaccuracy
  181. Benny's new ForeWatt SRPP pre amplifier
  182. OddWatt PP UL amplifier from scratch
  183. OPT Impedance
  184. Rectifier Valves
  185. WE311 amp
  186. Sherwood S8000 transformers
  187. yaqin MS-12B Search for Diagrams
  188. EICO HF-30 - Schematic
  189. 12AU7 Phono Stage
  190. How to install a motor run capcitor
  191. Sanity check on B+ regulator
  192. 6B4G PPP idea
  193. First OTL breadboarded
  194. New amp build
  195. Tube Parametric EQ - Idea looking for clarification
  196. Peavey Valveking 100- static sound during warm-up
  197. My Fender Twin Amp Not Working - get your guesses in
  198. DHT heater supply
  199. MC/MM Phono Pream PCB
  200. Help Identifying Old Westinghouse Tube Amp?
  201. GM70 SE Amplifier
  202. OPT considerations
  203. Help - the pre amp I made is not working!
  204. Aikido tube connections.
  205. EL34 PP output tranny questions
  206. DC heater voltage 6 volts or 12 volts?
  207. Dynaco st70....Can I use 6 ohm speakers?
  208. Aikido vs. Foreplay
  209. I found a valve amp in my garage...
  210. Separate PSU to Amp connection
  211. cheep miniure meters
  212. cary SLA 70
  213. Help!!! My Audioromy FU29 amplifier was fried!
  214. Help!!! My Audioromy FU29 amplifier was fried!
  215. Take a look at my transformers
  216. input transformer for Simple SE Tubelab amp
  217. miniblok 2 distorted sound
  218. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  219. For hk citation II owners\experts.
  220. Dynakit Mark III amplifier
  221. Transformer in reverse current doubt
  222. CELLINI-2 a hybrid
  223. Need help starting
  224. ARC (Audio Research) VT50
  225. mixed mode bias
  226. 2C52 datasheet
  227. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  228. 12v Tube amp
  229. Is this ok
  230. 12ax7 Bass Preamp Power Supply Question.
  231. Help a newbie out with his Sherwood S-800iii
  232. A&R 4008 output transformers
  233. Kulish Circuit
  234. A little digression= read on
  235. Sweep tubes and G3
  236. CCS - Help!
  237. Another odd-ball PA amplifier
  238. 25W with 2xEL86(6CW5)!
  239. Question About High-Fidelity Magazine 195x - 196x
  240. The HEATHKIT MA-12 a MULLARD 5-10 In Disguise.
  241. who have schematic of Phenix OTL G3?
  242. CHAMP8 with ECLL800
  243. Drive requirements.....
  244. KT88 hybrid amplifier
  245. 2300 ohm vs 5000 ohm output trans question
  246. Has anyone used this regulator?
  247. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  248. Current mirror circuits
  249. splitter/driver stage
  250. Would someone explain this amp to me please?

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