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  1. CAT SL1 SIGNATURE schematik phono
  2. Have anyone built this 6V6 amp?
  3. GU-50 in Single-Ended Triode Configuration - What bias points?
  4. DC coupling on a LTP? Opinions and help needed on Fred's design.
  5. Power Selection - Help Needed
  6. Which speaker with a 1/4W tube amp?
  7. 6973 VS 6CZ5 substitute
  8. Third Reich tubes
  9. Hello...and another ST-70 project.
  10. Home theater magic smoke...smoked and I think I heard a mirror crack...
  11. Scott LK48-B restoration
  12. 3 - 12AU7 Preamp. Is there such an animal?
  13. 300b filament
  14. resistor 880 ohms cathode
  15. Anyone have a Bugle Boy logo
  16. Change of circuit from triode to tetrode
  17. Need upgrade info for my Atma-Sphere Novacron Amps
  18. Whats Vintage Testing Equipment Do YOU Have/Use?
  19. JJ Kt77 Bias?
  20. tube rectified psu
  21. HELP!: my SET amp was turned off without a load and now it sound veiled!
  22. 5842 grid leak
  23. AMI Jukebox speaker impedence question
  24. Advice Needed: "Flabby" Amp Low-End
  25. Aikido transformer coupled output
  26. Audio measurements on tube amp. ? look here
  27. 12BH7A driver stage help
  28. Audio drive to g2 connected to g1 via 15K0
  29. KT88 SE Complete Kit
  30. Any high-end 6BM8 push pull tube amp schematic ?
  31. How a Triode Works
  32. EL3N substitute
  33. Magnavox AMP-185
  34. Best 6V6G that won't get me divorced..
  35. Shorted EL34 ?
  36. ARC VS60 hum in speaker
  37. Need help for a bias circuit
  38. Eico HF20 Output Txr Questions
  39. A Radford STA15 restoration story
  40. Tube Testing in DC Area
  41. Thorens PR24
  42. Newbie here with a couple questions
  43. 300B SwitchMode filament supply
  44. Mixed bias for balancing unmatched tubes in PPP?
  45. My First DIY Experience: An Aikido/Tetra Preamp
  46. how to test chokes for current and voltage
  47. pictures miniblok 1 and miniblok 2 by fred nachbaur
  48. Help with Aikido Preamp+class d amp
  49. will a PTX without center tap work?
  50. Anyone have information on 300B silvertone tube
  51. 6P14P push pull with low output
  52. passive 30Hz-20kHz Bandpass filter for tube preamp?
  53. My First Amp
  54. Frank's 6sn7 preamp
  55. My new 300B Amp
  56. help troubleshooting gradually distorting tube amp (dropping b+ voltage when hot)
  57. Tube Gear Supply/Surplus in Houston Area
  58. What 2a3 ?
  59. long tailed pair - need more gain
  60. how to bypass the volume pot on my SET amp?
  61. 2 stage AIKIDO
  62. Guys please help me with my Jolida 102B!
  63. Philbrick GAP/R K2-W question
  64. First time baby Huey amplifier build
  65. 6LB6's....
  66. LMG Capacitor
  67. Meng 6PI Biasing Question
  68. AIKIDO LV WON'T START
  69. Under rating of Vertical Sweep Tubes
  70. Simple 845 tube monoblock design
  71. Running on filament only
  72. soft stat
  73. BJT Bias?
  74. Preamp Squeal
  75. Hammond L101 compensation cap
  76. Powering a headphone amplifier with DC filament supply
  77. new to this
  78. miniblok 1 voltage problem
  79. How will this affect my amp?
  80. Tetra Phono Builders...got problems!
  81. yagoolar's tube amp projects
  82. Base material of GEC KT88 Feb 1960
  83. Headphone amp with 6n2p valve on 12V
  84. pcc189 for audio use
  85. Reading material
  86. 2A3 rectifier
  87. help calibrating a mercury model 1000 tube tester
  88. 866a valve test
  89. Anybody in the Knoxville area?
  90. Looking for simple Push-Pull tricks (from Baby Huey) #1
  91. Why wire an output transformer as autoformer ? (parafeed)
  92. Measuring unwanted grid current
  93. Tube companies
  94. heathkit a7???guitar amp
  95. Hi Performance Pre amp
  96. HH Scott Type 209 Amp
  97. 6l6gb PP w/fixed bias?
  98. Holy cow! Can anyone tell me why this wire is so pricey?
  99. EL34B 6N9P 5Z3P amplifier kit - any thoughts on schematic?
  100. 4 x EL84 in UL PP, 470 B+!! is this right
  101. What amp is this?
  102. PS Setup For Testing
  103. OTL designed by Tim Mellow with 4 6C33C?
  104. Bassman 100 schematic questions
  105. Quick question on this schematic
  106. Variac, how to ?
  107. Tube data sheets - inaccuracy
  108. Benny's new ForeWatt SRPP pre amplifier
  109. OddWatt PP UL amplifier from scratch
  110. OPT Impedance
  111. Rectifier Valves
  112. WE311 amp
  113. Sherwood S8000 transformers
  114. yaqin MS-12B Search for Diagrams
  115. EICO HF-30 - Schematic
  116. 12AU7 Phono Stage
  117. How to install a motor run capcitor
  118. Sanity check on B+ regulator
  119. 6B4G PPP idea
  120. First OTL breadboarded
  121. New amp build
  122. Tube Parametric EQ - Idea looking for clarification
  123. Peavey Valveking 100- static sound during warm-up
  124. My Fender Twin Amp Not Working - get your guesses in
  125. DHT heater supply
  126. MC/MM Phono Pream PCB
  127. Help Identifying Old Westinghouse Tube Amp?
  128. GM70 SE Amplifier
  129. OPT considerations
  130. Help - the pre amp I made is not working!
  131. Aikido tube connections.
  132. EL34 PP output tranny questions
  133. DC heater voltage 6 volts or 12 volts?
  134. Dynaco st70....Can I use 6 ohm speakers?
  135. Aikido vs. Foreplay
  136. I found a valve amp in my garage...
  137. Separate PSU to Amp connection
  138. cheep miniure meters
  139. cary SLA 70
  140. Help!!! My Audioromy FU29 amplifier was fried!
  141. Help!!! My Audioromy FU29 amplifier was fried!
  142. Take a look at my transformers
  143. input transformer for Simple SE Tubelab amp
  144. miniblok 2 distorted sound
  145. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  146. For hk citation II owners\experts.
  147. Dynakit Mark III amplifier
  148. Transformer in reverse current doubt
  149. CELLINI-2 a hybrid
  150. Need help starting
  151. ARC (Audio Research) VT50
  152. mixed mode bias
  153. 2C52 datasheet
  154. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  155. 12v Tube amp
  156. Is this ok
  157. 12ax7 Bass Preamp Power Supply Question.
  158. Help a newbie out with his Sherwood S-800iii
  159. A&R 4008 output transformers
  160. Kulish Circuit
  161. A little digression= read on
  162. Sweep tubes and G3
  163. CCS - Help!
  164. Another odd-ball PA amplifier
  165. 25W with 2xEL86(6CW5)!
  166. Question About High-Fidelity Magazine 195x - 196x
  167. The HEATHKIT MA-12 a MULLARD 5-10 In Disguise.
  168. who have schematic of Phenix OTL G3?
  169. CHAMP8 with ECLL800
  170. Drive requirements.....
  171. KT88 hybrid amplifier
  172. 2300 ohm vs 5000 ohm output trans question
  173. Has anyone used this regulator?
  174. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  175. Current mirror circuits
  176. splitter/driver stage
  177. Would someone explain this amp to me please?
  178. What am I experiencing?
  179. 6U10, 6AC10, 6D10, 6AV11
  180. My debut into the vacuum world: Yarland FV34B
  181. Resistor value tweaks for Radford STA35
  182. do you own a chinese tube integrate? does it.... smell?
  183. Needs help to find transformer
  184. 12AU7 / 12AX7 push-pull
  185. Subwoofer connection?
  186. Ultra-low Noise Valve Regulated PSU. How to?
  187. One channel has less glow
  188. 6l6 tube amp troubleshooring progress
  189. Baldwin organ transformers
  190. has anyone used a chip for an input driver to a 2A3 or the like??
  191. Good PSU for HT upt to 15mA??
  192. Edcor transformers have arrived, but really puzzled!
  193. PCL86 Tube Pre-Amp for guitar. Any Idea?
  194. Single tube, Single ended, 20W, impossible?
  195. Stan's Aikido Build
  196. Power transformer rating
  197. 7w 300b vs 350w Car audio observation (car loses)
  198. Seriously considering doing an OTL - but . .
  199. Emulating remote cut off
  200. Cheap Sakura Hybrid Tube Amp Modification
  201. screen tap on OPT
  202. Understanding Cathode Decoupling
  203. How to test interstage transformers?
  204. DIY Tube Mic
  205. Modified 6C33C
  206. Counterpoint SA-3.1 Rebuild
  207. 6V6 flare at start up
  208. Tube aging, in-circuit test?
  209. HV Regulator board
  210. What kind of top cap for 6V7G?
  211. Changing bass amp output transformer
  212. First timer wood chassis hints
  213. High voltage and heat sinks
  214. GM-70 family with top cap anode?
  215. testing 8417's on mercury 1000
  216. 6N3 Tube Preamp with DC-DC converter
  217. Question About Worn Tubes
  218. help ID 4-500 old stock tubes
  219. 6SN7 SRPP preamp
  220. Reduced Heater voltage to reduce noise
  221. ECL82 monoblock 'spud' and a question
  222. Small Tube/SS hybrid amplifier design 9V
  223. Gibson PA Amp
  224. Plate load impedance
  225. Dynaco 440 Transformer Cathode/Screen Taps 6P1P 6AQ5 UL transformer
  226. Good idle current for NOS 7868's
  227. 6N2P - WHAT THE?????????????
  228. Got an old Westinghouse radio today!!!
  229. Distinction between Driver and Output stages
  230. Need a decent chassis punch set
  231. UL P/P KT88 Class A
  232. Problem with 12ax7 phono stage
  233. LA2A parts, T4B spare
  234. Was ist das?
  235. Rset values for IXYS IXTP01N100D
  236. Dutch Book
  237. Tube amplifier chassis damping
  238. How the heck do I solve this problem????
  239. Pentode to Triode Operation
  240. AbouT the PSU II simulator & the "Cockeyed Bridge"
  241. GM70 bias & IT ratio question
  242. Transformer or choke sealed with metal case
  243. Peavy windsor tube head issue
  244. Projector 6V6 Tube Amp rats nest p2p
  245. micro pre amp
  246. Aikido - calculating Rk for new tubes
  247. Steady thumping noise in preamp
  248. Leak Stereo 20 hum and buzz problem
  249. 5V AC maining for filaments
  250. Topology for Schade

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