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  1. Tube Longevity
  2. Power triode drive current requirements
  3. OPT Selection Question
  4. Recommend me a 6V6 P-P schematic
  5. Requesting advice on a pre-amp build. I'm working on asking realistic questions.
  6. So, im going to replace the Alps with a PEC...someone help?
  7. 13e1 se "shade" some questions
  8. Pio russian capacitor K42-11...is good ?
  9. My first build VTA ST-120
  10. World Wide Audio, model: HBP-97a, Hybrid Power Amplifier - info needed
  11. DIY 50C5 mini amp...
  12. So you think you have cool tubes?????
  13. Layout
  14. Looking to ID this amp
  15. Help me to make tube amply
  16. CAT SL1 SIGNATURE schematik phono
  17. Have anyone built this 6V6 amp?
  18. GU-50 in Single-Ended Triode Configuration - What bias points?
  19. DC coupling on a LTP? Opinions and help needed on Fred's design.
  20. Power Selection - Help Needed
  21. Which speaker with a 1/4W tube amp?
  22. 6973 VS 6CZ5 substitute
  23. Third Reich tubes
  24. Hello...and another ST-70 project.
  25. Home theater magic smoke...smoked and I think I heard a mirror crack...
  26. Scott LK48-B restoration
  27. 3 - 12AU7 Preamp. Is there such an animal?
  28. 300b filament
  29. resistor 880 ohms cathode
  30. Anyone have a Bugle Boy logo
  31. Change of circuit from triode to tetrode
  32. Need upgrade info for my Atma-Sphere Novacron Amps
  33. Whats Vintage Testing Equipment Do YOU Have/Use?
  34. JJ Kt77 Bias?
  35. tube rectified psu
  36. HELP!: my SET amp was turned off without a load and now it sound veiled!
  37. 5842 grid leak
  38. AMI Jukebox speaker impedence question
  39. Advice Needed: "Flabby" Amp Low-End
  40. Aikido transformer coupled output
  41. Audio measurements on tube amp. ? look here
  42. 12BH7A driver stage help
  43. Audio drive to g2 connected to g1 via 15K0
  44. KT88 SE Complete Kit
  45. Any high-end 6BM8 push pull tube amp schematic ?
  46. How a Triode Works
  47. EL3N substitute
  48. Magnavox AMP-185
  49. Best 6V6G that won't get me divorced..
  50. Shorted EL34 ?
  51. ARC VS60 hum in speaker
  52. Need help for a bias circuit
  53. Eico HF20 Output Txr Questions
  54. A Radford STA15 restoration story
  55. Tube Testing in DC Area
  56. Thorens PR24
  57. Newbie here with a couple questions
  58. 300B SwitchMode filament supply
  59. Mixed bias for balancing unmatched tubes in PPP?
  60. My First DIY Experience: An Aikido/Tetra Preamp
  61. how to test chokes for current and voltage
  62. pictures miniblok 1 and miniblok 2 by fred nachbaur
  63. Help with Aikido Preamp+class d amp
  64. will a PTX without center tap work?
  65. Anyone have information on 300B silvertone tube
  66. 6P14P push pull with low output
  67. passive 30Hz-20kHz Bandpass filter for tube preamp?
  68. My First Amp
  69. Frank's 6sn7 preamp
  70. My new 300B Amp
  71. help troubleshooting gradually distorting tube amp (dropping b+ voltage when hot)
  72. Tube Gear Supply/Surplus in Houston Area
  73. What 2a3 ?
  74. long tailed pair - need more gain
  75. how to bypass the volume pot on my SET amp?
  76. 2 stage AIKIDO
  77. Guys please help me with my Jolida 102B!
  78. Philbrick GAP/R K2-W question
  79. First time baby Huey amplifier build
  80. 6LB6's....
  81. LMG Capacitor
  82. Meng 6PI Biasing Question
  83. AIKIDO LV WON'T START
  84. Under rating of Vertical Sweep Tubes
  85. Simple 845 tube monoblock design
  86. Running on filament only
  87. soft stat
  88. BJT Bias?
  89. Preamp Squeal
  90. Hammond L101 compensation cap
  91. Powering a headphone amplifier with DC filament supply
  92. new to this
  93. miniblok 1 voltage problem
  94. How will this affect my amp?
  95. Tetra Phono Builders...got problems!
  96. yagoolar's tube amp projects
  97. Base material of GEC KT88 Feb 1960
  98. Headphone amp with 6n2p valve on 12V
  99. pcc189 for audio use
  100. Reading material
  101. 2A3 rectifier
  102. help calibrating a mercury model 1000 tube tester
  103. 866a valve test
  104. Anybody in the Knoxville area?
  105. Looking for simple Push-Pull tricks (from Baby Huey) #1
  106. Why wire an output transformer as autoformer ? (parafeed)
  107. Measuring unwanted grid current
  108. Tube companies
  109. heathkit a7???guitar amp
  110. Hi Performance Pre amp
  111. HH Scott Type 209 Amp
  112. 6l6gb PP w/fixed bias?
  113. Holy cow! Can anyone tell me why this wire is so pricey?
  114. EL34B 6N9P 5Z3P amplifier kit - any thoughts on schematic?
  115. 4 x EL84 in UL PP, 470 B+!! is this right
  116. What amp is this?
  117. PS Setup For Testing
  118. OTL designed by Tim Mellow with 4 6C33C?
  119. Bassman 100 schematic questions
  120. Quick question on this schematic
  121. Variac, how to ?
  122. Tube data sheets - inaccuracy
  123. Benny's new ForeWatt SRPP pre amplifier
  124. OddWatt PP UL amplifier from scratch
  125. OPT Impedance
  126. Rectifier Valves
  127. WE311 amp
  128. Sherwood S8000 transformers
  129. yaqin MS-12B Search for Diagrams
  130. EICO HF-30 - Schematic
  131. 12AU7 Phono Stage
  132. How to install a motor run capcitor
  133. Sanity check on B+ regulator
  134. 6B4G PPP idea
  135. First OTL breadboarded
  136. New amp build
  137. Tube Parametric EQ - Idea looking for clarification
  138. Peavey Valveking 100- static sound during warm-up
  139. My Fender Twin Amp Not Working - get your guesses in
  140. DHT heater supply
  141. MC/MM Phono Pream PCB
  142. Help Identifying Old Westinghouse Tube Amp?
  143. GM70 SE Amplifier
  144. OPT considerations
  145. Help - the pre amp I made is not working!
  146. Aikido tube connections.
  147. EL34 PP output tranny questions
  148. DC heater voltage 6 volts or 12 volts?
  149. Dynaco st70....Can I use 6 ohm speakers?
  150. Aikido vs. Foreplay
  151. I found a valve amp in my garage...
  152. Separate PSU to Amp connection
  153. cheep miniure meters
  154. cary SLA 70
  155. Help!!! My Audioromy FU29 amplifier was fried!
  156. Help!!! My Audioromy FU29 amplifier was fried!
  157. Take a look at my transformers
  158. input transformer for Simple SE Tubelab amp
  159. miniblok 2 distorted sound
  160. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  161. For hk citation II owners\experts.
  162. Dynakit Mark III amplifier
  163. Transformer in reverse current doubt
  164. CELLINI-2 a hybrid
  165. Need help starting
  166. ARC (Audio Research) VT50
  167. mixed mode bias
  168. 2C52 datasheet
  169. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  170. 12v Tube amp
  171. Is this ok
  172. 12ax7 Bass Preamp Power Supply Question.
  173. Help a newbie out with his Sherwood S-800iii
  174. A&R 4008 output transformers
  175. Kulish Circuit
  176. A little digression= read on
  177. Sweep tubes and G3
  178. CCS - Help!
  179. Another odd-ball PA amplifier
  180. 25W with 2xEL86(6CW5)!
  181. Question About High-Fidelity Magazine 195x - 196x
  182. The HEATHKIT MA-12 a MULLARD 5-10 In Disguise.
  183. who have schematic of Phenix OTL G3?
  184. CHAMP8 with ECLL800
  185. Drive requirements.....
  186. KT88 hybrid amplifier
  187. 2300 ohm vs 5000 ohm output trans question
  188. Has anyone used this regulator?
  189. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  190. Current mirror circuits
  191. splitter/driver stage
  192. Would someone explain this amp to me please?
  193. What am I experiencing?
  194. 6U10, 6AC10, 6D10, 6AV11
  195. My debut into the vacuum world: Yarland FV34B
  196. Resistor value tweaks for Radford STA35
  197. do you own a chinese tube integrate? does it.... smell?
  198. Needs help to find transformer
  199. 12AU7 / 12AX7 push-pull
  200. Subwoofer connection?
  201. Ultra-low Noise Valve Regulated PSU. How to?
  202. One channel has less glow
  203. 6l6 tube amp troubleshooring progress
  204. Baldwin organ transformers
  205. has anyone used a chip for an input driver to a 2A3 or the like??
  206. Good PSU for HT upt to 15mA??
  207. Edcor transformers have arrived, but really puzzled!
  208. PCL86 Tube Pre-Amp for guitar. Any Idea?
  209. Single tube, Single ended, 20W, impossible?
  210. Stan's Aikido Build
  211. Power transformer rating
  212. 7w 300b vs 350w Car audio observation (car loses)
  213. Seriously considering doing an OTL - but . .
  214. Emulating remote cut off
  215. Cheap Sakura Hybrid Tube Amp Modification
  216. screen tap on OPT
  217. Understanding Cathode Decoupling
  218. How to test interstage transformers?
  219. DIY Tube Mic
  220. Modified 6C33C
  221. Counterpoint SA-3.1 Rebuild
  222. 6V6 flare at start up
  223. Tube aging, in-circuit test?
  224. HV Regulator board
  225. What kind of top cap for 6V7G?
  226. Changing bass amp output transformer
  227. First timer wood chassis hints
  228. High voltage and heat sinks
  229. GM-70 family with top cap anode?
  230. testing 8417's on mercury 1000
  231. 6N3 Tube Preamp with DC-DC converter
  232. Question About Worn Tubes
  233. help ID 4-500 old stock tubes
  234. 6SN7 SRPP preamp
  235. Reduced Heater voltage to reduce noise
  236. ECL82 monoblock 'spud' and a question
  237. Small Tube/SS hybrid amplifier design 9V
  238. Gibson PA Amp
  239. Plate load impedance
  240. Dynaco 440 Transformer Cathode/Screen Taps 6P1P 6AQ5 UL transformer
  241. Good idle current for NOS 7868's
  242. 6N2P - WHAT THE?????????????
  243. Got an old Westinghouse radio today!!!
  244. Distinction between Driver and Output stages
  245. Need a decent chassis punch set
  246. UL P/P KT88 Class A
  247. Problem with 12ax7 phono stage
  248. LA2A parts, T4B spare
  249. Was ist das?
  250. Rset values for IXYS IXTP01N100D

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