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  1. What 2a3 ?
  2. long tailed pair - need more gain
  3. how to bypass the volume pot on my SET amp?
  4. 2 stage AIKIDO
  5. Guys please help me with my Jolida 102B!
  6. Philbrick GAP/R K2-W question
  7. First time baby Huey amplifier build
  8. 6LB6's....
  9. LMG Capacitor
  10. Meng 6PI Biasing Question
  11. AIKIDO LV WON'T START
  12. Under rating of Vertical Sweep Tubes
  13. Simple 845 tube monoblock design
  14. Running on filament only
  15. soft stat
  16. BJT Bias?
  17. Preamp Squeal
  18. Hammond L101 compensation cap
  19. Powering a headphone amplifier with DC filament supply
  20. new to this
  21. miniblok 1 voltage problem
  22. How will this affect my amp?
  23. Tetra Phono Builders...got problems!
  24. yagoolar's tube amp projects
  25. Base material of GEC KT88 Feb 1960
  26. Headphone amp with 6n2p valve on 12V
  27. pcc189 for audio use
  28. Reading material
  29. 2A3 rectifier
  30. help calibrating a mercury model 1000 tube tester
  31. 866a valve test
  32. Anybody in the Knoxville area?
  33. Looking for simple Push-Pull tricks (from Baby Huey) #1
  34. Why wire an output transformer as autoformer ? (parafeed)
  35. Measuring unwanted grid current
  36. Tube companies
  37. heathkit a7???guitar amp
  38. Hi Performance Pre amp
  39. HH Scott Type 209 Amp
  40. 6l6gb PP w/fixed bias?
  41. Holy cow! Can anyone tell me why this wire is so pricey?
  42. EL34B 6N9P 5Z3P amplifier kit - any thoughts on schematic?
  43. 4 x EL84 in UL PP, 470 B+!! is this right
  44. What amp is this?
  45. PS Setup For Testing
  46. OTL designed by Tim Mellow with 4 6C33C?
  47. Bassman 100 schematic questions
  48. Quick question on this schematic
  49. Variac, how to ?
  50. Tube data sheets - inaccuracy
  51. Benny's new ForeWatt SRPP pre amplifier
  52. OddWatt PP UL amplifier from scratch
  53. OPT Impedance
  54. Rectifier Valves
  55. WE311 amp
  56. Sherwood S8000 transformers
  57. yaqin MS-12B Search for Diagrams
  58. EICO HF-30 - Schematic
  59. 12AU7 Phono Stage
  60. How to install a motor run capcitor
  61. Sanity check on B+ regulator
  62. 6B4G PPP idea
  63. First OTL breadboarded
  64. New amp build
  65. Tube Parametric EQ - Idea looking for clarification
  66. Peavey Valveking 100- static sound during warm-up
  67. My Fender Twin Amp Not Working - get your guesses in
  68. DHT heater supply
  69. MC/MM Phono Pream PCB
  70. Help Identifying Old Westinghouse Tube Amp?
  71. GM70 SE Amplifier
  72. OPT considerations
  73. Help - the pre amp I made is not working!
  74. Aikido tube connections.
  75. EL34 PP output tranny questions
  76. DC heater voltage 6 volts or 12 volts?
  77. Dynaco st70....Can I use 6 ohm speakers?
  78. Aikido vs. Foreplay
  79. I found a valve amp in my garage...
  80. Separate PSU to Amp connection
  81. cheep miniure meters
  82. cary SLA 70
  83. Help!!! My Audioromy FU29 amplifier was fried!
  84. Help!!! My Audioromy FU29 amplifier was fried!
  85. Take a look at my transformers
  86. input transformer for Simple SE Tubelab amp
  87. miniblok 2 distorted sound
  88. Appropriate replacement OPT for Fisher 30-A with 2.5Ohm Secondary
  89. For hk citation II owners\experts.
  90. Dynakit Mark III amplifier
  91. Transformer in reverse current doubt
  92. CELLINI-2 a hybrid
  93. Need help starting
  94. ARC (Audio Research) VT50
  95. mixed mode bias
  96. 2C52 datasheet
  97. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  98. 12v Tube amp
  99. Is this ok
  100. 12ax7 Bass Preamp Power Supply Question.
  101. Help a newbie out with his Sherwood S-800iii
  102. A&R 4008 output transformers
  103. Kulish Circuit
  104. A little digression= read on
  105. Sweep tubes and G3
  106. CCS - Help!
  107. Another odd-ball PA amplifier
  108. 25W with 2xEL86(6CW5)!
  109. Question About High-Fidelity Magazine 195x - 196x
  110. The HEATHKIT MA-12 a MULLARD 5-10 In Disguise.
  111. who have schematic of Phenix OTL G3?
  112. CHAMP8 with ECLL800
  113. Drive requirements.....
  114. KT88 hybrid amplifier
  115. 2300 ohm vs 5000 ohm output trans question
  116. Has anyone used this regulator?
  117. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  118. Current mirror circuits
  119. splitter/driver stage
  120. Would someone explain this amp to me please?
  121. What am I experiencing?
  122. 6U10, 6AC10, 6D10, 6AV11
  123. My debut into the vacuum world: Yarland FV34B
  124. Resistor value tweaks for Radford STA35
  125. do you own a chinese tube integrate? does it.... smell?
  126. Needs help to find transformer
  127. 12AU7 / 12AX7 push-pull
  128. Subwoofer connection?
  129. Ultra-low Noise Valve Regulated PSU. How to?
  130. One channel has less glow
  131. 6l6 tube amp troubleshooring progress
  132. Baldwin organ transformers
  133. has anyone used a chip for an input driver to a 2A3 or the like??
  134. Good PSU for HT upt to 15mA??
  135. Edcor transformers have arrived, but really puzzled!
  136. PCL86 Tube Pre-Amp for guitar. Any Idea?
  137. Single tube, Single ended, 20W, impossible?
  138. Stan's Aikido Build
  139. Power transformer rating
  140. 7w 300b vs 350w Car audio observation (car loses)
  141. Seriously considering doing an OTL - but . .
  142. Emulating remote cut off
  143. Cheap Sakura Hybrid Tube Amp Modification
  144. screen tap on OPT
  145. Understanding Cathode Decoupling
  146. How to test interstage transformers?
  147. DIY Tube Mic
  148. Modified 6C33C
  149. Counterpoint SA-3.1 Rebuild
  150. 6V6 flare at start up
  151. Tube aging, in-circuit test?
  152. HV Regulator board
  153. What kind of top cap for 6V7G?
  154. Changing bass amp output transformer
  155. First timer wood chassis hints
  156. High voltage and heat sinks
  157. GM-70 family with top cap anode?
  158. testing 8417's on mercury 1000
  159. 6N3 Tube Preamp with DC-DC converter
  160. Question About Worn Tubes
  161. help ID 4-500 old stock tubes
  162. 6SN7 SRPP preamp
  163. Reduced Heater voltage to reduce noise
  164. ECL82 monoblock 'spud' and a question
  165. Small Tube/SS hybrid amplifier design 9V
  166. Gibson PA Amp
  167. Plate load impedance
  168. Dynaco 440 Transformer Cathode/Screen Taps 6P1P 6AQ5 UL transformer
  169. Good idle current for NOS 7868's
  170. 6N2P - WHAT THE?????????????
  171. Got an old Westinghouse radio today!!!
  172. Distinction between Driver and Output stages
  173. Need a decent chassis punch set
  174. UL P/P KT88 Class A
  175. Problem with 12ax7 phono stage
  176. LA2A parts, T4B spare
  177. Was ist das?
  178. Rset values for IXYS IXTP01N100D
  179. Dutch Book
  180. Tube amplifier chassis damping
  181. How the heck do I solve this problem????
  182. Pentode to Triode Operation
  183. AbouT the PSU II simulator & the "Cockeyed Bridge"
  184. GM70 bias & IT ratio question
  185. Transformer or choke sealed with metal case
  186. Peavy windsor tube head issue
  187. Projector 6V6 Tube Amp rats nest p2p
  188. micro pre amp
  189. Aikido - calculating Rk for new tubes
  190. Steady thumping noise in preamp
  191. Leak Stereo 20 hum and buzz problem
  192. 5V AC maining for filaments
  193. Topology for Schade
  194. Thorsten 6SN7 Line stage.
  195. 12v B+ Tube buffer 12AX7
  196. 300B preamp - best operating point
  197. home made tube amp with 12v b+ how to build one?
  198. Engineer's Amp
  199. Show My Tube Headphone Amp [Add-On Modulars Design Supporting IPOD/IPHONE]
  200. FFT for adjusting tubes
  201. Music to soothe the savage tubes.
  202. Voltage divider instead of expensive volume pot or stepped attenuator.
  203. Question about Hickok 539C
  204. Long-tail pair phase splitter
  205. LM317 calculator for filament circuit
  206. Self-Biased Cathode Follower Output Point
  207. filaments power supply
  208. Power tube buffer
  209. Latching Switch Assemblies
  210. Easy Way To Reduce 251V to 235V?
  211. EL84 Push Pull 25-30 watts
  212. Exploded view of valves
  213. Infineon BSP135 depletion mode mosfet
  214. Show us you COMPACT tube amps !
  215. HV Regulator
  216. Help with my new system
  217. Anything similar to the RNT900 regulator?
  218. The 3W Hammond 125ASE output transformer
  219. Carbon Comp vs Metal Film
  220. Different brand valves
  221. Buzz In Guitar Amp
  222. quad el84 or PP el34
  223. Inexpensive wire source
  224. to MC30 or not to MC30
  225. unbypassed cathode resistor
  226. Supro Golden Holiday Schematic Needed
  227. Does this transformer work?
  228. Max grid resistance for GM70?
  229. Stacked power supply HELP!
  230. Parallel pwr supply chokes for add'l current?
  231. Need help to verify Amperex 7119's genuineness
  232. Need help/advice on a problem with console amplifier
  233. Getting started with my VERY FIRST project
  234. PCL Vintage Amp VA1956 - transformer issue
  235. Help to Identify
  236. 300B based preamp....looking for schematic
  237. USB Oscilloscope
  238. RH84SE, use as headphone amp ?
  239. The New Yaqin/Music Angel/Meng & Others Discussion Thread
  240. Power triode bias by tube rectifier
  241. Two questions on IR volume control
  242. 25 watt output tube
  243. DC heating my 300b
  244. RNT-900 regulator
  245. KT61 Equivalent - Ping Waveborne
  246. EICO 666 meter needle moves too fast/pegs too hard...help?
  247. Eico 666 meter movement speed help
  248. Running a tube without heaters
  249. SE-BAL-SE Switching
  250. What makes is stereo?

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