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  1. Connecting valve shields to earth
  2. Shindo MAZERIS BELLEVUS MODEL 454-2xAttenuator-How works this Circuit? 6067+12BH7
  3. Fixed bias failure B+ switch off protection
  4. Who can tell me where to buy Caddock MS220
  5. Uses for Quicksilver Transformers
  6. SE amp problem
  7. EL-34 to 6P3S-E
  8. 6922 sepp with Balanced Gains
  9. What path to choose for Hamonica amplifier?
  10. tubes for these OPT?, pri 1.75Kohm, sec 2.5, 4, 8ohm, taps 20%, weight 4Kg
  11. Turning a 6.3 V secondary into a 5 V secondary on an Antek 2T350
  12. gridchokes/output caps
  13. Can I build an MC30?
  14. Cathodyne: Can someone please help me fill in the blanks ?
  15. help hovland hp200
  16. 6SL7 and 6AS7 PP amplifier, design advice needed
  17. Project: Baldwin Tube Amp...
  18. Power Supply Input Capacitor - JE simple 45 question
  19. Tube output: Voltage or Current source?
  20. Edcor's new E-store website.....finally!
  21. Help complete the 300B schematic
  22. Confusion about a 5Y3GT rectifier
  23. Need advice on 300B circuit
  24. PCB in components
  25. new 6080 dc pp
  26. Single ended to balanced Aikido with mosfets in buffer position
  27. Simple LED power indicator light circuit?
  28. about 83 mercury rectifier
  29. Aikido Zo Calculation
  30. Line out issue - 1965 Ampeg B-18-N
  31. Pavane/ Psvane 845, 805, 211, 12AX7, 12AU7, 12AT7 and EL84
  32. Is this Telefunken fake or OEM?
  33. About Hmmmmm
  34. PRE-AMP PROJECT SRPP + HEADPHONE AMP
  35. 6BN11 vs 6CB6
  36. Is output stage local feedback necessary?
  37. Tube Longevity
  38. Power triode drive current requirements
  39. OPT Selection Question
  40. Recommend me a 6V6 P-P schematic
  41. Requesting advice on a pre-amp build. I'm working on asking realistic questions.
  42. So, im going to replace the Alps with a PEC...someone help?
  43. 13e1 se "shade" some questions
  44. Pio russian capacitor K42-11...is good ?
  45. My first build VTA ST-120
  46. World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
  47. DIY 50C5 mini amp...
  48. So you think you have cool tubes?????
  49. Layout
  50. Looking to ID this amp
  51. Help me to make tube amply
  52. CAT SL1 SIGNATURE schematik phono
  53. Have anyone built this 6V6 amp?
  54. GU-50 in Single-Ended Triode Configuration - What bias points?
  55. DC coupling on a LTP? Opinions and help needed on Fred's design.
  56. Power Selection - Help Needed
  57. Which speaker with a 1/4W tube amp?
  58. 6973 VS 6CZ5 substitute
  59. Third Reich tubes
  60. Hello...and another ST-70 project.
  61. Home theater magic smoke...smoked and I think I heard a mirror crack...
  62. Scott LK48-B restoration
  63. 3 - 12AU7 Preamp. Is there such an animal?
  64. 300b filament
  65. resistor 880 ohms cathode
  66. Anyone have a Bugle Boy logo
  67. Change of circuit from triode to tetrode
  68. Need upgrade info for my Atma-Sphere Novacron Amps
  69. Whats Vintage Testing Equipment Do YOU Have/Use?
  70. JJ Kt77 Bias?
  71. tube rectified psu
  72. HELP!: my SET amp was turned off without a load and now it sound veiled!
  73. 5842 grid leak
  74. AMI Jukebox speaker impedence question
  75. Advice Needed: "Flabby" Amp Low-End
  76. Aikido transformer coupled output
  77. Audio measurements on tube amp. ? look here
  78. 12BH7A driver stage help
  79. Audio drive to g2 connected to g1 via 15K0
  80. KT88 SE Complete Kit
  81. Any high-end 6BM8 push pull tube amp schematic ?
  82. How a Triode Works
  83. EL3N substitute
  84. Magnavox AMP-185
  85. Best 6V6G that won't get me divorced..
  86. Shorted EL34 ?
  87. ARC VS60 hum in speaker
  88. Need help for a bias circuit
  89. Eico HF20 Output Txr Questions
  90. A Radford STA15 restoration story
  91. Tube Testing in DC Area
  92. Thorens PR24
  93. Newbie here with a couple questions
  94. 300B SwitchMode filament supply
  95. Mixed bias for balancing unmatched tubes in PPP?
  96. My First DIY Experience: An Aikido/Tetra Preamp
  97. how to test chokes for current and voltage
  98. pictures miniblok 1 and miniblok 2 by fred nachbaur
  99. Help with Aikido Preamp+class d amp
  100. will a PTX without center tap work?
  101. Anyone have information on 300B silvertone tube
  102. 6P14P push pull with low output
  103. passive 30Hz-20kHz Bandpass filter for tube preamp?
  104. My First Amp
  105. Frank's 6sn7 preamp
  106. My new 300B Amp
  107. help troubleshooting gradually distorting tube amp (dropping b+ voltage when hot)
  108. Tube Gear Supply/Surplus in Houston Area
  109. What 2a3 ?
  110. long tailed pair - need more gain
  111. how to bypass the volume pot on my SET amp?
  112. 2 stage AIKIDO
  113. Guys please help me with my Jolida 102B!
  114. Philbrick GAP/R K2-W question
  115. First time baby Huey amplifier build
  116. 6LB6's....
  117. LMG Capacitor
  118. Meng 6PI Biasing Question
  119. AIKIDO LV WON'T START
  120. Under rating of Vertical Sweep Tubes
  121. Simple 845 tube monoblock design
  122. Running on filament only
  123. soft stat
  124. BJT Bias?
  125. Preamp Squeal
  126. Hammond L101 compensation cap
  127. Powering a headphone amplifier with DC filament supply
  128. new to this
  129. miniblok 1 voltage problem
  130. How will this affect my amp?
  131. Tetra Phono Builders...got problems!
  132. yagoolar's tube amp projects
  133. Base material of GEC KT88 Feb 1960
  134. Headphone amp with 6n2p valve on 12V
  135. pcc189 for audio use
  136. Reading material
  137. 2A3 rectifier
  138. help calibrating a mercury model 1000 tube tester
  139. 866a valve test
  140. Anybody in the Knoxville area?
  141. Looking for simple Push-Pull tricks (from Baby Huey) #1
  142. Why wire an output transformer as autoformer ? (parafeed)
  143. Measuring unwanted grid current
  144. Tube companies
  145. heathkit a7???guitar amp
  146. Hi Performance Pre amp
  147. HH Scott Type 209 Amp
  148. 6l6gb PP w/fixed bias?
  149. Holy cow! Can anyone tell me why this wire is so pricey?
  150. EL34B 6N9P 5Z3P amplifier kit - any thoughts on schematic?
  151. 4 x EL84 in UL PP, 470 B+!! is this right
  152. What amp is this?
  153. PS Setup For Testing
  154. OTL designed by Tim Mellow with 4 6C33C?
  155. Bassman 100 schematic questions
  156. Quick question on this schematic
  157. Variac, how to ?
  158. Tube data sheets - inaccuracy
  159. Benny's new ForeWatt SRPP pre amplifier
  160. OddWatt PP UL amplifier from scratch
  161. OPT Impedance
  162. Rectifier Valves
  163. WE311 amp
  164. Sherwood S8000 transformers
  165. yaqin MS-12B Search for Diagrams
  166. EICO HF-30 - Schematic
  167. 12AU7 Phono Stage
  168. How to install a motor run capcitor
  169. Sanity check on B+ regulator
  170. 6B4G PPP idea
  171. First OTL breadboarded
  172. New amp build
  173. Tube Parametric EQ - Idea looking for clarification
  174. Peavey Valveking 100- static sound during warm-up
  175. My Fender Twin Amp Not Working - get your guesses in
  176. DHT heater supply
  177. MC/MM Phono Pream PCB
  178. Help Identifying Old Westinghouse Tube Amp?
  179. GM70 SE Amplifier
  180. OPT considerations
  181. Help - the pre amp I made is not working!
  182. Aikido tube connections.
  183. EL34 PP output tranny questions
  184. DC heater voltage 6 volts or 12 volts?
  185. Dynaco st70....Can I use 6 ohm speakers?
  186. Aikido vs. Foreplay
  187. I found a valve amp in my garage...
  188. Separate PSU to Amp connection
  189. cheep miniure meters
  190. cary SLA 70
  191. Help!!! My Audioromy FU29 amplifier was fried!
  192. Help!!! My Audioromy FU29 amplifier was fried!
  193. Take a look at my transformers
  194. input transformer for Simple SE Tubelab amp
  195. miniblok 2 distorted sound
  196. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  197. For hk citation II owners\experts.
  198. Dynakit Mark III amplifier
  199. Transformer in reverse current doubt
  200. CELLINI-2 a hybrid
  201. Need help starting
  202. ARC (Audio Research) VT50
  203. mixed mode bias
  204. 2C52 datasheet
  205. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  206. 12v Tube amp
  207. Is this ok
  208. 12ax7 Bass Preamp Power Supply Question.
  209. Help a newbie out with his Sherwood S-800iii
  210. A&R 4008 output transformers
  211. Kulish Circuit
  212. A little digression= read on
  213. Sweep tubes and G3
  214. CCS - Help!
  215. Another odd-ball PA amplifier
  216. 25W with 2xEL86(6CW5)!
  217. Question About High-Fidelity Magazine 195x - 196x
  218. The HEATHKIT MA-12 a MULLARD 5-10 In Disguise.
  219. who have schematic of Phenix OTL G3?
  220. CHAMP8 with ECLL800
  221. Drive requirements.....
  222. KT88 hybrid amplifier
  223. 2300 ohm vs 5000 ohm output trans question
  224. Has anyone used this regulator?
  225. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  226. Current mirror circuits
  227. splitter/driver stage
  228. Would someone explain this amp to me please?
  229. What am I experiencing?
  230. 6U10, 6AC10, 6D10, 6AV11
  231. My debut into the vacuum world: Yarland FV34B
  232. Resistor value tweaks for Radford STA35
  233. do you own a chinese tube integrate? does it.... smell?
  234. Needs help to find transformer
  235. 12AU7 / 12AX7 push-pull
  236. Subwoofer connection?
  237. Ultra-low Noise Valve Regulated PSU. How to?
  238. One channel has less glow
  239. 6l6 tube amp troubleshooring progress
  240. Baldwin organ transformers
  241. has anyone used a chip for an input driver to a 2A3 or the like??
  242. Good PSU for HT upt to 15mA??
  243. Edcor transformers have arrived, but really puzzled!
  244. PCL86 Tube Pre-Amp for guitar. Any Idea?
  245. Single tube, Single ended, 20W, impossible?
  246. Stan's Aikido Build
  247. Power transformer rating
  248. 7w 300b vs 350w Car audio observation (car loses)
  249. Seriously considering doing an OTL - but . .
  250. Emulating remote cut off

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