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  1. Mistake on OPT connections : have I damaged something ?
  2. Looking for Jim Morrison Siren Song preamp schematic
  3. cap question....
  4. Ming Da MC368-B90
  5. single tube to drive 300ohm headphones
  6. Negative Feedback?
  7. Capacitor voltage ratings
  8. Possible to convert an oscilloscope into a tube amp?
  9. "Junkbox" 2A5 SE
  10. Power supply testing
  11. Tubeamp power supply - LC question
  12. tube amp coupling cap - audiospace
  13. Radford pentode-triode LTP splitter
  14. Tube bias testers, your opinions, please.
  15. Just saw this and thought I'd pass it along. . .
  16. 6KG6-EL509-EL519 Schematics wanted
  17. Difference between SE output transformer and push-pull output transformers
  18. Sourcing OPTs in Australia
  19. Is there a LOCTAL equiv to a 6V6?
  20. 10m45s LTspice model
  21. What circuit and tube to be used
  22. experimental 6L6G / 6BG6G amp design brainstorm
  23. 29GK6 heater current?
  24. Bench PS: stacking DC supplies
  25. Mr Liung schematics
  26. Want to build tube amp
  27. Runaway bias on Hot Rod Deville
  28. Back to back transformers.
  29. Using Battery for 300v B+ ?
  30. Anyone recognice this RIAA?
  31. Power cord replacement
  32. Negative LTP CCS supply
  33. c-j pre amp blowing tubes?
  34. first amp build
  35. Tube Mic Preamp - which Edcor transformer?
  36. Scaling the SLCF for other voltage - help
  37. Question about Allied & Hammond Power Transformer Ratings
  38. Education
  39. Tubelab SE with a 6BX7 to drive 845s
  40. Bias Ground
  41. Suggestions for RIAA preamp?
  42. External Test Points
  43. b2spice model request
  44. 12aY 7 preamp out
  45. 3B7 Loctal DHT
  46. Aikido All in One line stage amp PCB
  47. SS power supply.
  48. 6AU6 pentodes
  49. Parafeed with NP electrolytic?
  50. Charlie K - RIP
  51. Need some advise with a hum problem
  52. What resistor should I use?
  53. IN18 nixies
  54. Tubelab SE build and power supply questions.
  55. Quality of S5's K-12G in proposed system
  56. Gibson EH 150 restoration
  57. Transformer volume control questions.
  58. Power transformer star ground
  59. Shielding and chassis
  60. Side project - d3a and 6c41c
  61. Cathode-heater leakage
  62. Bell 2122 volume drop off
  63. -500V Maida regulator inquiry
  64. 7591 is glowing RED
  65. Hum problem
  66. Need PS schematic for Musical Machine
  67. Polystyrene capacitor as coupling in output tube stages
  68. Help needed with 10M45S integration .
  69. Ultrasonic Cleaning??????
  70. The daunting world of tubes (where to start)
  71. help 124.3 vac
  72. Bat VK3i buzzing noise
  73. Audioromy FU13 (813) diagram and mods
  74. any complete schematic for 6ak5?
  75. Weird fuzz from Aikido Pre, HELP!
  76. Question about tube amplifier.
  77. 811a rating question
  78. Anode chokes DIY?
  79. EI laminations in Europe
  80. Needed: transformer core materials cobalt nickel
  81. Anybody from Italy - please help
  82. Bogen AP35 amp problem
  83. Question about a VR screen supply
  84. DIY Amp Contest in Japan
  85. Hot 5AR4/GZ34 arcing on powerup surge?
  86. Rh84 Ptx
  87. Buzz. Grounding-related?
  88. 50/60Hz Hum - Your Expert Opinion Please
  89. Static Gm test
  90. High Voltage negative regulators
  91. where do i find old tube car radio schematics?
  92. Burned Up Transformer in HiFi 6p3p Tube Amplifier
  93. capacitors
  94. Wire Types
  95. Weird EH12AY7 Problem
  96. Pot and knob compatability
  97. ECC8100 and ECC2000
  98. DHT experts, i need your help
  99. transformers
  100. Vetruvio class-A
  101. PP to balanced input
  102. KT88 AB2 Experiences
  103. Group buy pulse check for Pete Millett tube crossover PCB
  104. Calculating operating point of a DHT
  105. upgrades, mods to JADIS JA-200, JPS2 and JPS3
  106. McIntosh MC-3500 Schematic Information
  107. Use 2X SE output transformers fo 1x PP
  108. 12B4a spice model.
  109. Help identifying a capacitor
  110. recommended a tube amp for Celestron Studio Ditton 66's
  111. Help needed with bias circuit
  112. 220 Mega Ohm Resistor - Really
  113. How to bias DH dual triodes?
  114. Any of these tubes good for audio applications?
  115. DIY AN M7 need help !!!
  116. Need schematic for Bell 2420 amp
  117. new SimpleSE build
  118. My Citation II Rebuild
  119. KT88 cathode resistors?
  120. Dynaco ST35 boards
  121. Triode strapping a 6V6 (or any tetrode/pentode, really)
  122. ECC 83 + ELL 80 maybe?
  123. need amp suggestions please.
  124. Phase splitter which tube?
  125. WANTED: 12B4A tubes
  126. re-stacking an output transformer
  127. A directly heated triode or Pentode SE amp on a Budget
  128. Annoying high frequency ringing from my 832 tube amp
  129. 30 Amp Knobs
  130. A question about audio interconnects for the ones here with such knowledge.
  131. Hi-end GM70 amplifier with only 2 stages
  132. Paragon
  133. Simple SE with CCS and fixed bias
  134. Idea(s) for simple HV regulated psu
  135. NOS Philips "miniwatt/dario" tubes
  136. Hybrid Class D with 6n6p tubes
  137. Any ideas how to estimate VA or mA of Power Tranny
  138. 6L6 Grid resistors??
  139. HeathKit W-2: Missing Tube
  140. Edcor CXSE25-8-5K Dimensions
  141. Bias Pots
  142. Negative Feedback
  143. scott 299D output transformers?
  144. chocke anode load, please explain me..
  145. Integrated HiEnd Amp
  146. Looking for advice/tips regarding simple SE amplifer
  147. Tube amps from vintage RTR's?
  148. componet upgrade
  149. What is "AA" ?
  150. question about twin triode tubes
  151. Building a preamp - somewhat new to tubes
  152. need some guidance about tube amplifiers
  153. Blackgate FK 10000 uF ??
  154. PT failure dangers
  155. Outer foil k40y-9
  156. sansui 1000a maintenance
  157. filter cap question
  158. add UL tap for 125ese
  159. Bogen D070 Amp - HELP w/ INFO.
  160. Humming asl 2004dt wave pre amp
  161. Cany anyone supply any info. about this amplifier?
  162. Low voltage 845SE with 300B driver
  163. Cabinet Help!!!!
  164. dc heater supply help
  165. gu-29 tube
  166. LTP question
  167. Over 500V rated electrolytics?
  168. Fireplug? (inline fuse)
  169. Help! Flash-over on my amp :-(
  170. 6550 drive question
  171. 4211D Amp?
  172. Please, reccomand me about 7233 GE NOS
  173. Help! Schematic Conrad Johnson Premier 3
  174. Tubelab SE in parallel?
  175. Just an Idea?
  176. Tried this out, but needs more gain. . .
  177. EL34 Power Stage
  178. Daven Question
  179. How many rectifiers can have mesh plates?
  180. Real Quick Question!!
  181. Wattage of vintage resistors ?
  182. What is the signal path -- the red line?
  183. Hi-end definitive vacuum tube phono pre
  184. Resistors for Stepped Attenuator
  185. dual rectifier clone....
  186. Motorola Console Salvage
  187. single endedtransformer coupled 6sn7 mic preamp
  188. Brett's 12B4 schematic?
  189. insulated turret terminals
  190. Building first tube power amplifier, reccomendations?
  191. Can you use a MOSFET as a cathodyne
  192. Resolving cold midrange in 5687 circuit
  193. 829B SE Comments????
  194. Shielding and regulator location in the KTA 26 preamp
  195. Voice of music, antique or reproduction?
  196. Quick Question - Audio Note M1 or AR SP-6?
  197. Red Light District/Baby Huey (EL84 P-P) Output Iron
  198. help with PSE design
  199. Tantalum VS CC & metalfilm
  200. Rise-time question
  201. Have an odd problem with my Aikido.
  202. Weird Hybrid Splitter (equal impedances?)
  203. Tube 6550 to test
  204. Using semiconductor curvetracer for tubes...
  205. Question regarding 3rd wire grounding and safety
  206. Plate Current VS Plate Voltage Graphs
  207. Toggle Switch Contact Type and Rating
  208. Inside information on Shuguang
  209. 6N6P vs. 6N6P-I
  210. Technical Survey Paper -- Need Some Help!
  211. VOLTAGE DOUBLER : drop in current?
  212. Using genetic algorithms to optimize pentode parameters
  213. Favorite size wire for signal wiring?
  214. Any idea what this thing is?
  215. Breadboarding Poindexter's 6GK5/EL34 Music Machine
  216. bad 5ar4?
  217. 6DJ8 biasing question
  218. anyone ever use el86/6cw5?
  219. Is it worth using anything other than DHTs for preamps?
  220. Billington Export Ltd Tubes?
  221. 845SE : comments on this circuit?
  222. Tip-Restoring Vintage Pot
  223. B+ Delay - Is this a problem?
  224. Toroids in SET
  225. I have to sell my Pyramid-V prototype...
  226. Stealing a preamp
  227. OLD GOLD, or something I can dissassemble and use
  228. CF PP design
  229. Preamp Idea
  230. Metal Oxide Screen Stoppers
  231. Splitting up power supply inductance
  232. Back to Back transformers and safety ground
  233. Vintage tube tester
  234. 7 pin ECC81.
  235. 26 Driver Tube for 45 - Operating Points
  236. My New pre-amplifier£°
  237. Echocord Super Question
  238. High quality matching panel meters?
  239. 6BY5GA question
  240. Seeking schematic for Conn organ amp
  241. Will this work as a differential stage?
  242. Tube ID and suggestions
  243. 6L6 to EL34 conversion
  244. my saturation test ??
  245. DO-35 diode inside vacuum tube ?
  246. Transformer Polarity
  247. Modular Gain Stages for Tube Guitar Amp
  248. Where to go for tube gear in Hong Kong?
  249. EL84 Shunt reg for pre-amp, 85A1?
  250. Tube Preamp Idea

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