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  1. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  2. RCA tube amp woes/hum/ground
  3. EF86 microphony
  4. John Broskie Kits
  5. Refurbish Conrad Johnson Premier Eight
  6. 4tube Philco amp project...
  7. Thoughts on bias for PPP
  8. 2012's Acquired Parts- ..Custom Build Anyone?
  9. Can I use a variable voltage cieling fan switch as a variac?
  10. Audio research LS2 hiss and hum... need help
  11. saba electro sound
  12. Ra on C3g and 6C45pi?
  13. Partial Feedback System
  14. An Electronic Loss Compressor
  15. K-12g one channel louder than the other
  16. Sun SV2a3 or 45?
  17. Red imP(asse)
  18. An application of C-Vac: the SolidGlass amplifier
  19. Fixing crooked laminate stacks?
  20. EF184 driver
  21. Woo Audio WA7 temperature
  22. Resistor w/cap or LED or battery bias?
  23. Transformers Back to back vs. Voltage Doubler
  24. 211: 75W or 100W?
  25. Does really need a balanced preamp ?
  26. Power Transformer Hum
  27. Options for how to use this old tube PA amp? > 200W
  28. Flash getter question
  29. Heath W4 Output Xfmr - anyone measure one??
  30. Tube buffer with 6n3-EV
  31. First time with hi-fi, need some advise with amp desing
  32. Newbie wants to build SET 6C33C
  33. Another PP GU50
  34. SE Waveform
  35. Problem with CCS for filaments
  36. UL / Distributed Load - Screen vs. CFB Winding Ratios
  37. 50W PP - KT88 Build
  38. OP Tx and PPP to PP change over
  39. I need a little more advice on a Glassware Janus shunt regularor
  40. Pentode noise
  41. Dynaco ST-35 Circuits
  42. BIG Transformer Covers - Where to Find?
  43. Amplification breaks up after some time
  44. 6A5G schematic; changes from the 6Y6G tube
  45. ECC83 differential preamp optimisation
  46. 6Y6G SE SCHEMATIC NEEDING HELP!
  47. Need help identifying this tube...
  48. AMI DD project. Someone did some mods before me and I don't know whats what.
  49. (v?)Tailor PA-500 Tube Amp
  50. Transformer arrangement?
  51. Don't be stupid, you can't possibly do that with output transformers?
  52. Maximum Plate/Screen Voltage 6550 in UL
  53. Paper insulation for output transformers?
  54. Best PP OPT 30-100W range
  55. Tripath TA2020 + 6N3 Tube buffer
  56. El34 as triode
  57. tube preamp vol ctrl -- before or after?
  58. matisse preamp -review
  59. Ribbon Microphone Preamp
  60. Looking for tubes 6CL8 pentode Triode with lower output ratings
  61. Reducing Signal Level Without Affecting Tone
  62. VTVM/VOM???
  63. Micro amp - all-tube, direct heated, portable and IT FITS
  64. Wiring a 6AS7G to be Push Pull within its own envelope
  65. Wima MKP
  66. Will this circuit work ?
  67. new amp build
  68. MKP DC-LINK vs electrolytic power supply 4 tube amp
  69. Looking for ECC81
  70. Unison Research S6 (old version) auto or fixed bias?
  71. Troubleshooting a restored Edison 12 valve amplifier
  72. Counterpoint SA-220
  73. LTSpice models needed
  74. Magnavox 6V6 amp upgrade
  75. breadboard for tubes
  76. Looking for ideas... 50W OPTs
  77. SE Power Supply PCB
  78. Speakers for the 16LS Stereo Tube Amplifier
  79. will E80CF fit into yaqin 100b
  80. RH84 Rev2 Build w/Premium parts
  81. Single ended KT88 / 6SN7 not enough power
  82. Problem with push-pull KT88
  83. opinions please!
  84. Tube testing 101?
  85. Top aluminum plate from ProtoPanel.com
  86. 6GK5/300B
  87. Screen driven sweep tubes - the return of the evil kink?
  88. Parafeed 45 amps
  89. Has anyone tried the 6p1p EV?
  90. ECC88 mu-follower
  91. Reducing gain of a WE91 type amp
  92. 6sn7 mu-follower
  93. AES Preamp mods
  94. Oh! Darling
  95. Testing 3B22 on Hickok 752a
  96. Has anyone ever used the 6C41C in PP?
  97. RH 6V6
  98. Unholtz-Dickie amp, 4-1000's
  99. Somewhat Newbie..
  100. grounding RCA inputs
  101. ESS9018 I/V
  102. Catode follower with 6N7S (6n7GT)
  103. Recommended RIAA Values for this Circuit
  104. PC board design for PSE amp
  105. Audio Research SP-11 HV Regulator
  106. heathkit SA2
  107. russian 1578 tube production years
  108. partial list of tubes I have
  109. Bench Power Supply Questions ?
  110. Identify this tube?
  111. your input - bulb / led / neon selection for short tester
  112. Potted choke orientation/amp layout
  113. Tamura F-2012
  114. Joining output windings
  115. B&K 650 tube tester
  116. 5687 LTSpice model needed
  117. Can you identify this transformer? 70V line matching?
  118. I had to post this..the 211 in all its glory!
  119. Help with preamp/driver/output setup
  120. Accident - Shorted Cathode to grid!!
  121. Correct B+ for EL84 UL PP
  122. RH807 output transformer....what did you use?
  123. Headphone tube amp with balanced output?
  124. Tube buffer with 6n1p-EV
  125. First little SE
  126. ID Nice Unknown Tube
  127. Bell and Howell Model-601
  128. what should my mulit reader be on to bias yaqin 100b
  129. Fixing an old Tandberg Huldra 6 Radio
  130. 30W sweep tube amp
  131. Atmosphère S-40 with KT88, does someone know about this amp?
  132. What happens when Output transformer max voltage (slightly) exceeded?
  133. what type is the best?
  134. Kiwame carbon resistors
  135. Rocker Switch Wiring
  136. RH6550
  137. Diodes for Marantz 8B
  138. Diodes for Marantz 8B
  139. Telefunken 2430 Opus Resistor Burnout
  140. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  141. Conrad Johnson MV40 copy and Fisher OP's
  142. Are EF86 Tubes inherently microphonic?
  143. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  144. Need a rectifier tube...
  145. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.
  146. How much spl can a triode take?
  147. Octal CCDA kit - help needed!
  148. Mod input of 6AU6/6AQ5 amp for iPod
  149. Put a tube on your PC just for fun..
  150. ST35 Cathode Feedback
  151. Series Shunt tube regulator
  152. Help ID this tube ^&$**@# lettering!
  153. Adding a db VU meter to an existing tube mic pre
  154. Quad 22 interstage cap?
  155. First test of my AX84 HI-octane
  156. 4P1L triode PP (40W!!?)
  157. KT88 shootout vintage vs new vs 90
  158. Help needed to identify this british made Amp
  159. PSU II Question
  160. Quality tube buffer with ECC83
  161. K12g Amp Question
  162. Stark 9-66 tube tester - repair help
  163. output transfo problem
  164. Pair of Fisher CA-40 Oddballs
  165. Model 601 tube amp.
  166. Model 601 Tube amp
  167. First power amp build. Is this normal??
  168. Compactronized 6146
  169. Preamp and inverter on B7G base tubes circuit.
  170. Advice and Suggestions on Amp designs
  171. Help who tube buffer x10-d
  172. EL803S-6CW5 / EL86 amp design check (schematic attached)
  173. amp buzz in one channel on inrush / power on
  174. SE 8-10W monoblock build help
  175. GlassWare Tube CAD
  176. SMD Parts and the DIYer
  177. 6CW5 / EL86 operating point
  178. RH84 power output
  179. 6n6p-ir
  180. Transformer bubbling
  181. Crackling noise.... pls help on Pre-amp
  182. RH84 amp. Plate is 300V. What voltage...
  183. Amplificator Class A 2 X EL504
  184. Help in testing 12ax7 and 7869 tubes
  185. Micro-Cap Tubes Parameters question
  186. Cathode Bypass Capacitor
  187. NOOB ALERT! sooo omany questions.....
  188. IS THIS A REAL E810F ???
  189. Chassis design question / cooling of small signal valves
  190. 5 leads pp output transformer
  191. Vote and Comment: SRPP vs. Aikido vs. Grounded Grid
  192. NEED ADVICE ON THIS SCHEMATIC AND WILL IT WOFK
  193. Help Identifying a Console Pull Amplifier
  194. sunaudio 2A3 circuit...is it good for newbie?
  195. KT120: When does it starts to sing ?
  196. Simple Time Delay (no more excuses for not having one)
  197. Cary SLP-05
  198. 6SN7 Grounded Grid
  199. input selector switch replacement help
  200. help needed with transformer wiring
  201. Tube Schematic Drawig Packages
  202. 12AU7 - 5V4G easy amplifier
  203. Glassware CCA 9-pin PDF
  204. Replacement for the tube 6922 (ECC88)?
  205. Which probes for my first scope?
  206. PP CATHODE BIAS WITH "CCS"
  207. current output tube amplifier
  208. Tube amp for a small room (newbie-like)
  209. What is this old thing from1929?
  210. Arduino cathode current HT etc
  211. Bizzare Output Transformer Connectivity...
  212. OPT to KT88?
  213. Help needed on identifing tube
  214. Amplifier circuit from tube radio
  215. Amplifier circuit from tube radio
  216. Using Valves Library in EAGLE CAD
  217. Biggest noval power pentode?
  218. Akita 12V preamp thoughts
  219. Help, what is this (Marconi 6204) ?
  220. Anyone try DHT 33 or 1Q5 Pentodes wired as Triode?
  221. Would this be a good buy?
  222. Looking for a complete DIY Tube amp
  223. Schematic by TS LIM Pre-amp
  224. Fisher Model 100 'AZ' Mono Amp Rebuild w/ Oscillations
  225. Measuring inductance
  226. Leak stereo 20
  227. Gain and gm of a QQE03/20 anyone ??
  228. Power supply options for tube amplifiers.
  229. CCS question mA
  230. Help wanted with testing and finetuning.
  231. YAQIN VK2100 pre amp
  232. Identify record player and valve
  233. AC Line Filter
  234. blue flash inside 5Y3GT
  235. Heater-Cathode Leakage
  236. Old Tube Kit
  237. Point to Point SET KT88/6550 Build
  238. D3a - MOSFET HYBRID CIRCLOTRON
  239. Aikido CCDA
  240. output impedance
  241. Bizzaro fix for hum problem needs explanation! Pretty Please
  242. Bizzaro fix for hum problem needs explanation! Pretty Please
  243. Questions regarding first build - K-502
  244. Good tube tech in Brooklyn NYC?
  245. Looking for LTspice tube models
  246. Audio Research SP15 : faulty phono stage
  247. Spark 810 looking for the diagram
  248. HP 8903B Question ?
  249. 1955 Hammond Organ Tube Amp
  250. Suggestions Please

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