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  1. Converting Yarland FV-34AIII to Triode and Zero NF
  2. 5U4GB PS question
  3. 6X8 Pentode/Triode Musings
  4. DDD mfg co High Voltage power supply?
  5. Mistake on OPT connections : have I damaged something ?
  6. Looking for Jim Morrison Siren Song preamp schematic
  7. cap question....
  8. Ming Da MC368-B90
  9. single tube to drive 300ohm headphones
  10. Negative Feedback?
  11. Capacitor voltage ratings
  12. Possible to convert an oscilloscope into a tube amp?
  13. "Junkbox" 2A5 SE
  14. Power supply testing
  15. Tubeamp power supply - LC question
  16. tube amp coupling cap - audiospace
  17. Radford pentode-triode LTP splitter
  18. Tube bias testers, your opinions, please.
  19. Just saw this and thought I'd pass it along. . .
  20. 6KG6-EL509-EL519 Schematics wanted
  21. Difference between SE output transformer and push-pull output transformers
  22. Sourcing OPTs in Australia
  23. Is there a LOCTAL equiv to a 6V6?
  24. 10m45s LTspice model
  25. What circuit and tube to be used
  26. experimental 6L6G / 6BG6G amp design brainstorm
  27. 29GK6 heater current?
  28. Bench PS: stacking DC supplies
  29. Mr Liung schematics
  30. Want to build tube amp
  31. Runaway bias on Hot Rod Deville
  32. Back to back transformers.
  33. Using Battery for 300v B+ ?
  34. Anyone recognice this RIAA?
  35. Power cord replacement
  36. Negative LTP CCS supply
  37. c-j pre amp blowing tubes?
  38. first amp build
  39. Tube Mic Preamp - which Edcor transformer?
  40. Scaling the SLCF for other voltage - help
  41. Question about Allied & Hammond Power Transformer Ratings
  42. Education
  43. Tubelab SE with a 6BX7 to drive 845s
  44. Bias Ground
  45. Suggestions for RIAA preamp?
  46. External Test Points
  47. b2spice model request
  48. 12aY 7 preamp out
  49. 3B7 Loctal DHT
  50. Aikido All in One line stage amp PCB
  51. SS power supply.
  52. 6AU6 pentodes
  53. Parafeed with NP electrolytic?
  54. Charlie K - RIP
  55. Need some advise with a hum problem
  56. What resistor should I use?
  57. IN18 nixies
  58. Tubelab SE build and power supply questions.
  59. Quality of S5's K-12G in proposed system
  60. Gibson EH 150 restoration
  61. Transformer volume control questions.
  62. Power transformer star ground
  63. Shielding and chassis
  64. Side project - d3a and 6c41c
  65. Cathode-heater leakage
  66. Bell 2122 volume drop off
  67. -500V Maida regulator inquiry
  68. 7591 is glowing RED
  69. Hum problem
  70. Need PS schematic for Musical Machine
  71. Polystyrene capacitor as coupling in output tube stages
  72. Help needed with 10M45S integration .
  73. Ultrasonic Cleaning??????
  74. The daunting world of tubes (where to start)
  75. help 124.3 vac
  76. Bat VK3i buzzing noise
  77. Audioromy FU13 (813) diagram and mods
  78. any complete schematic for 6ak5?
  79. Weird fuzz from Aikido Pre, HELP!
  80. Question about tube amplifier.
  81. 811a rating question
  82. Anode chokes DIY?
  83. EI laminations in Europe
  84. Needed: transformer core materials cobalt nickel
  85. Anybody from Italy - please help
  86. Bogen AP35 amp problem
  87. Question about a VR screen supply
  88. DIY Amp Contest in Japan
  89. Hot 5AR4/GZ34 arcing on powerup surge?
  90. Rh84 Ptx
  91. Buzz. Grounding-related?
  92. 50/60Hz Hum - Your Expert Opinion Please
  93. Static Gm test
  94. High Voltage negative regulators
  95. where do i find old tube car radio schematics?
  96. Burned Up Transformer in HiFi 6p3p Tube Amplifier
  97. capacitors
  98. Wire Types
  99. Weird EH12AY7 Problem
  100. Pot and knob compatability
  101. ECC8100 and ECC2000
  102. DHT experts, i need your help
  103. transformers
  104. Vetruvio class-A
  105. PP to balanced input
  106. KT88 AB2 Experiences
  107. Group buy pulse check for Pete Millett tube crossover PCB
  108. Calculating operating point of a DHT
  109. upgrades, mods to JADIS JA-200, JPS2 and JPS3
  110. McIntosh MC-3500 Schematic Information
  111. Use 2X SE output transformers fo 1x PP
  112. 12B4a spice model.
  113. Help identifying a capacitor
  114. recommended a tube amp for Celestron Studio Ditton 66's
  115. Help needed with bias circuit
  116. 220 Mega Ohm Resistor - Really
  117. How to bias DH dual triodes?
  118. Any of these tubes good for audio applications?
  119. DIY AN M7 need help !!!
  120. Need schematic for Bell 2420 amp
  121. new SimpleSE build
  122. My Citation II Rebuild
  123. KT88 cathode resistors?
  124. Dynaco ST35 boards
  125. Triode strapping a 6V6 (or any tetrode/pentode, really)
  126. ECC 83 + ELL 80 maybe?
  127. need amp suggestions please.
  128. Phase splitter which tube?
  129. WANTED: 12B4A tubes
  130. re-stacking an output transformer
  131. A directly heated triode or Pentode SE amp on a Budget
  132. Annoying high frequency ringing from my 832 tube amp
  133. 30 Amp Knobs
  134. A question about audio interconnects for the ones here with such knowledge.
  135. Hi-end GM70 amplifier with only 2 stages
  136. Paragon
  137. Simple SE with CCS and fixed bias
  138. Idea(s) for simple HV regulated psu
  139. NOS Philips "miniwatt/dario" tubes
  140. Hybrid Class D with 6n6p tubes
  141. Any ideas how to estimate VA or mA of Power Tranny
  142. 6L6 Grid resistors??
  143. HeathKit W-2: Missing Tube
  144. Edcor CXSE25-8-5K Dimensions
  145. Bias Pots
  146. Negative Feedback
  147. scott 299D output transformers?
  148. chocke anode load, please explain me..
  149. Integrated HiEnd Amp
  150. Looking for advice/tips regarding simple SE amplifer
  151. Tube amps from vintage RTR's?
  152. componet upgrade
  153. What is "AA" ?
  154. question about twin triode tubes
  155. Building a preamp - somewhat new to tubes
  156. need some guidance about tube amplifiers
  157. Blackgate FK 10000 uF ??
  158. PT failure dangers
  159. Outer foil k40y-9
  160. sansui 1000a maintenance
  161. filter cap question
  162. add UL tap for 125ese
  163. Bogen D070 Amp - HELP w/ INFO.
  164. Humming asl 2004dt wave pre amp
  165. Cany anyone supply any info. about this amplifier?
  166. Low voltage 845SE with 300B driver
  167. Cabinet Help!!!!
  168. dc heater supply help
  169. gu-29 tube
  170. LTP question
  171. Over 500V rated electrolytics?
  172. Fireplug? (inline fuse)
  173. Help! Flash-over on my amp :-(
  174. 6550 drive question
  175. 4211D Amp?
  176. Please, reccomand me about 7233 GE NOS
  177. Help! Schematic Conrad Johnson Premier 3
  178. Tubelab SE in parallel?
  179. Just an Idea?
  180. Tried this out, but needs more gain. . .
  181. EL34 Power Stage
  182. Daven Question
  183. How many rectifiers can have mesh plates?
  184. Real Quick Question!!
  185. Wattage of vintage resistors ?
  186. What is the signal path -- the red line?
  187. Hi-end definitive vacuum tube phono pre
  188. Resistors for Stepped Attenuator
  189. dual rectifier clone....
  190. Motorola Console Salvage
  191. single endedtransformer coupled 6sn7 mic preamp
  192. Brett's 12B4 schematic?
  193. insulated turret terminals
  194. Building first tube power amplifier, reccomendations?
  195. Can you use a MOSFET as a cathodyne
  196. Resolving cold midrange in 5687 circuit
  197. 829B SE Comments????
  198. Shielding and regulator location in the KTA 26 preamp
  199. Voice of music, antique or reproduction?
  200. Quick Question - Audio Note M1 or AR SP-6?
  201. Red Light District/Baby Huey (EL84 P-P) Output Iron
  202. help with PSE design
  203. Tantalum VS CC & metalfilm
  204. Rise-time question
  205. Have an odd problem with my Aikido.
  206. Weird Hybrid Splitter (equal impedances?)
  207. Tube 6550 to test
  208. Using semiconductor curvetracer for tubes...
  209. Question regarding 3rd wire grounding and safety
  210. Plate Current VS Plate Voltage Graphs
  211. Toggle Switch Contact Type and Rating
  212. Inside information on Shuguang
  213. 6N6P vs. 6N6P-I
  214. Technical Survey Paper -- Need Some Help!
  215. VOLTAGE DOUBLER : drop in current?
  216. Using genetic algorithms to optimize pentode parameters
  217. Favorite size wire for signal wiring?
  218. Any idea what this thing is?
  219. Breadboarding Poindexter's 6GK5/EL34 Music Machine
  220. bad 5ar4?
  221. 6DJ8 biasing question
  222. anyone ever use el86/6cw5?
  223. Is it worth using anything other than DHTs for preamps?
  224. Billington Export Ltd Tubes?
  225. 845SE : comments on this circuit?
  226. Tip-Restoring Vintage Pot
  227. B+ Delay - Is this a problem?
  228. Toroids in SET
  229. I have to sell my Pyramid-V prototype...
  230. Stealing a preamp
  231. OLD GOLD, or something I can dissassemble and use
  232. CF PP design
  233. Preamp Idea
  234. Metal Oxide Screen Stoppers
  235. Splitting up power supply inductance
  236. Back to Back transformers and safety ground
  237. Vintage tube tester
  238. 7 pin ECC81.
  239. 26 Driver Tube for 45 - Operating Points
  240. My New pre-amplifier£°
  241. Echocord Super Question
  242. High quality matching panel meters?
  243. 6BY5GA question
  244. Seeking schematic for Conn organ amp
  245. Will this work as a differential stage?
  246. Tube ID and suggestions
  247. 6L6 to EL34 conversion
  248. my saturation test ??
  249. DO-35 diode inside vacuum tube ?
  250. Transformer Polarity

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