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  1. Power Supply Input Capacitor - JE simple 45 question
  2. Tube output: Voltage or Current source?
  3. Edcor's new E-store website.....finally!
  4. Help complete the 300B schematic
  5. Confusion about a 5Y3GT rectifier
  6. Need advice on 300B circuit
  7. PCB in components
  8. new 6080 dc pp
  9. Single ended to balanced Aikido with mosfets in buffer position
  10. Simple LED power indicator light circuit?
  11. about 83 mercury rectifier
  12. Aikido Zo Calculation
  13. Line out issue - 1965 Ampeg B-18-N
  14. Pavane/ Psvane 845, 805, 211, 12AX7, 12AU7, 12AT7 and EL84
  15. Is this Telefunken fake or OEM?
  16. About Hmmmmm
  17. PRE-AMP PROJECT SRPP + HEADPHONE AMP
  18. 6BN11 vs 6CB6
  19. Is output stage local feedback necessary?
  20. Tube Longevity
  21. Power triode drive current requirements
  22. OPT Selection Question
  23. Recommend me a 6V6 P-P schematic
  24. Requesting advice on a pre-amp build. I'm working on asking realistic questions.
  25. So, im going to replace the Alps with a PEC...someone help?
  26. 13e1 se "shade" some questions
  27. Pio russian capacitor K42-11...is good ?
  28. My first build VTA ST-120
  29. World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
  30. DIY 50C5 mini amp...
  31. So you think you have cool tubes?????
  32. Layout
  33. Looking to ID this amp
  34. Help me to make tube amply
  35. CAT SL1 SIGNATURE schematik phono
  36. Have anyone built this 6V6 amp?
  37. GU-50 in Single-Ended Triode Configuration - What bias points?
  38. DC coupling on a LTP? Opinions and help needed on Fred's design.
  39. Power Selection - Help Needed
  40. Which speaker with a 1/4W tube amp?
  41. 6973 VS 6CZ5 substitute
  42. Third Reich tubes
  43. Hello...and another ST-70 project.
  44. Home theater magic smoke...smoked and I think I heard a mirror crack...
  45. Scott LK48-B restoration
  46. 3 - 12AU7 Preamp. Is there such an animal?
  47. 300b filament
  48. resistor 880 ohms cathode
  49. Anyone have a Bugle Boy logo
  50. Change of circuit from triode to tetrode
  51. Need upgrade info for my Atma-Sphere Novacron Amps
  52. Whats Vintage Testing Equipment Do YOU Have/Use?
  53. JJ Kt77 Bias?
  54. tube rectified psu
  55. HELP!: my SET amp was turned off without a load and now it sound veiled!
  56. 5842 grid leak
  57. AMI Jukebox speaker impedence question
  58. Advice Needed: "Flabby" Amp Low-End
  59. Aikido transformer coupled output
  60. Audio measurements on tube amp. ? look here
  61. 12BH7A driver stage help
  62. Audio drive to g2 connected to g1 via 15K0
  63. KT88 SE Complete Kit
  64. Any high-end 6BM8 push pull tube amp schematic ?
  65. How a Triode Works
  66. EL3N substitute
  67. Magnavox AMP-185
  68. Best 6V6G that won't get me divorced..
  69. Shorted EL34 ?
  70. ARC VS60 hum in speaker
  71. Need help for a bias circuit
  72. Eico HF20 Output Txr Questions
  73. A Radford STA15 restoration story
  74. Tube Testing in DC Area
  75. Thorens PR24
  76. Newbie here with a couple questions
  77. 300B SwitchMode filament supply
  78. Mixed bias for balancing unmatched tubes in PPP?
  79. My First DIY Experience: An Aikido/Tetra Preamp
  80. how to test chokes for current and voltage
  81. pictures miniblok 1 and miniblok 2 by fred nachbaur
  82. Help with Aikido Preamp+class d amp
  83. will a PTX without center tap work?
  84. Anyone have information on 300B silvertone tube
  85. 6P14P push pull with low output
  86. passive 30Hz-20kHz Bandpass filter for tube preamp?
  87. My First Amp
  88. Frank's 6sn7 preamp
  89. My new 300B Amp
  90. help troubleshooting gradually distorting tube amp (dropping b+ voltage when hot)
  91. Tube Gear Supply/Surplus in Houston Area
  92. What 2a3 ?
  93. long tailed pair - need more gain
  94. how to bypass the volume pot on my SET amp?
  95. 2 stage AIKIDO
  96. Guys please help me with my Jolida 102B!
  97. Philbrick GAP/R K2-W question
  98. First time baby Huey amplifier build
  99. 6LB6's....
  100. LMG Capacitor
  101. Meng 6PI Biasing Question
  102. AIKIDO LV WON'T START
  103. Under rating of Vertical Sweep Tubes
  104. Simple 845 tube monoblock design
  105. Running on filament only
  106. soft stat
  107. BJT Bias?
  108. Preamp Squeal
  109. Hammond L101 compensation cap
  110. Powering a headphone amplifier with DC filament supply
  111. new to this
  112. miniblok 1 voltage problem
  113. How will this affect my amp?
  114. Tetra Phono Builders...got problems!
  115. yagoolar's tube amp projects
  116. Base material of GEC KT88 Feb 1960
  117. Headphone amp with 6n2p valve on 12V
  118. pcc189 for audio use
  119. Reading material
  120. 2A3 rectifier
  121. help calibrating a mercury model 1000 tube tester
  122. 866a valve test
  123. Anybody in the Knoxville area?
  124. Looking for simple Push-Pull tricks (from Baby Huey) #1
  125. Why wire an output transformer as autoformer ? (parafeed)
  126. Measuring unwanted grid current
  127. Tube companies
  128. heathkit a7???guitar amp
  129. Hi Performance Pre amp
  130. HH Scott Type 209 Amp
  131. 6l6gb PP w/fixed bias?
  132. Holy cow! Can anyone tell me why this wire is so pricey?
  133. EL34B 6N9P 5Z3P amplifier kit - any thoughts on schematic?
  134. 4 x EL84 in UL PP, 470 B+!! is this right
  135. What amp is this?
  136. PS Setup For Testing
  137. OTL designed by Tim Mellow with 4 6C33C?
  138. Bassman 100 schematic questions
  139. Quick question on this schematic
  140. Variac, how to ?
  141. Tube data sheets - inaccuracy
  142. Benny's new ForeWatt SRPP pre amplifier
  143. OddWatt PP UL amplifier from scratch
  144. OPT Impedance
  145. Rectifier Valves
  146. WE311 amp
  147. Sherwood S8000 transformers
  148. yaqin MS-12B Search for Diagrams
  149. EICO HF-30 - Schematic
  150. 12AU7 Phono Stage
  151. How to install a motor run capcitor
  152. Sanity check on B+ regulator
  153. 6B4G PPP idea
  154. First OTL breadboarded
  155. New amp build
  156. Tube Parametric EQ - Idea looking for clarification
  157. Peavey Valveking 100- static sound during warm-up
  158. My Fender Twin Amp Not Working - get your guesses in
  159. DHT heater supply
  160. MC/MM Phono Pream PCB
  161. Help Identifying Old Westinghouse Tube Amp?
  162. GM70 SE Amplifier
  163. OPT considerations
  164. Help - the pre amp I made is not working!
  165. Aikido tube connections.
  166. EL34 PP output tranny questions
  167. DC heater voltage 6 volts or 12 volts?
  168. Dynaco st70....Can I use 6 ohm speakers?
  169. Aikido vs. Foreplay
  170. I found a valve amp in my garage...
  171. Separate PSU to Amp connection
  172. cheep miniure meters
  173. cary SLA 70
  174. Help!!! My Audioromy FU29 amplifier was fried!
  175. Help!!! My Audioromy FU29 amplifier was fried!
  176. Take a look at my transformers
  177. input transformer for Simple SE Tubelab amp
  178. miniblok 2 distorted sound
  179. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  180. For hk citation II owners\experts.
  181. Dynakit Mark III amplifier
  182. Transformer in reverse current doubt
  183. CELLINI-2 a hybrid
  184. Need help starting
  185. ARC (Audio Research) VT50
  186. mixed mode bias
  187. 2C52 datasheet
  188. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  189. 12v Tube amp
  190. Is this ok
  191. 12ax7 Bass Preamp Power Supply Question.
  192. Help a newbie out with his Sherwood S-800iii
  193. A&R 4008 output transformers
  194. Kulish Circuit
  195. A little digression= read on
  196. Sweep tubes and G3
  197. CCS - Help!
  198. Another odd-ball PA amplifier
  199. 25W with 2xEL86(6CW5)!
  200. Question About High-Fidelity Magazine 195x - 196x
  201. The HEATHKIT MA-12 a MULLARD 5-10 In Disguise.
  202. who have schematic of Phenix OTL G3?
  203. CHAMP8 with ECLL800
  204. Drive requirements.....
  205. KT88 hybrid amplifier
  206. 2300 ohm vs 5000 ohm output trans question
  207. Has anyone used this regulator?
  208. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  209. Current mirror circuits
  210. splitter/driver stage
  211. Would someone explain this amp to me please?
  212. What am I experiencing?
  213. 6U10, 6AC10, 6D10, 6AV11
  214. My debut into the vacuum world: Yarland FV34B
  215. Resistor value tweaks for Radford STA35
  216. do you own a chinese tube integrate? does it.... smell?
  217. Needs help to find transformer
  218. 12AU7 / 12AX7 push-pull
  219. Subwoofer connection?
  220. Ultra-low Noise Valve Regulated PSU. How to?
  221. One channel has less glow
  222. 6l6 tube amp troubleshooring progress
  223. Baldwin organ transformers
  224. has anyone used a chip for an input driver to a 2A3 or the like??
  225. Good PSU for HT upt to 15mA??
  226. Edcor transformers have arrived, but really puzzled!
  227. PCL86 Tube Pre-Amp for guitar. Any Idea?
  228. Single tube, Single ended, 20W, impossible?
  229. Stan's Aikido Build
  230. Power transformer rating
  231. 7w 300b vs 350w Car audio observation (car loses)
  232. Seriously considering doing an OTL - but . .
  233. Emulating remote cut off
  234. Cheap Sakura Hybrid Tube Amp Modification
  235. screen tap on OPT
  236. Understanding Cathode Decoupling
  237. How to test interstage transformers?
  238. DIY Tube Mic
  239. Modified 6C33C
  240. Counterpoint SA-3.1 Rebuild
  241. 6V6 flare at start up
  242. Tube aging, in-circuit test?
  243. HV Regulator board
  244. What kind of top cap for 6V7G?
  245. Changing bass amp output transformer
  246. First timer wood chassis hints
  247. High voltage and heat sinks
  248. GM-70 family with top cap anode?
  249. testing 8417's on mercury 1000
  250. 6N3 Tube Preamp with DC-DC converter

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