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  1. 807 SE Amp
  2. HELP With VOX AC100CPH
  3. Stromberg Carlson ASR 220C blowing fuse
  4. EF806 pentode + CCS
  5. Transformer Identification
  6. Hickok 800A line adjust problem
  7. Heathkit AA 121 parts
  8. Conrad Johnson PV-8: how to convert 110v to 220v
  9. Help me understand Edcor wiring?
  10. Another paralleled to single push-pull EL84 mod.
  11. Sca35 tone controls
  12. Tube preamp noise
  13. Fountek Tube Amp
  14. Choke & Transformer Positioning Problem
  15. The adventure time tube amp- Did any catch it?
  16. Input wiring question
  17. Let's talk triode-pentode
  18. Tried failed, looking for suggestions
  19. Need HELP converting Bogen MX30a pa into a preamp for recording
  20. Edcor Wrong Transformer...
  21. 812A Build
  22. Still not sure where to start
  23. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  24. RCA tube amp woes/hum/ground
  25. EF86 microphony
  26. John Broskie Kits
  27. Refurbish Conrad Johnson Premier Eight
  28. 4tube Philco amp project...
  29. Thoughts on bias for PPP
  30. 2012's Acquired Parts- ..Custom Build Anyone?
  31. Can I use a variable voltage cieling fan switch as a variac?
  32. Audio research LS2 hiss and hum... need help
  33. saba electro sound
  34. Ra on C3g and 6C45pi?
  35. Partial Feedback System
  36. An Electronic Loss Compressor
  37. K-12g one channel louder than the other
  38. Sun SV2a3 or 45?
  39. Red imP(asse)
  40. An application of C-Vac: the SolidGlass amplifier
  41. Fixing crooked laminate stacks?
  42. EF184 driver
  43. Woo Audio WA7 temperature
  44. Resistor w/cap or LED or battery bias?
  45. Transformers Back to back vs. Voltage Doubler
  46. 211: 75W or 100W?
  47. Does really need a balanced preamp ?
  48. Power Transformer Hum
  49. Options for how to use this old tube PA amp? > 200W
  50. Flash getter question
  51. Heath W4 Output Xfmr - anyone measure one??
  52. Tube buffer with 6n3-EV
  53. First time with hi-fi, need some advise with amp desing
  54. Newbie wants to build SET 6C33C
  55. Another PP GU50
  56. SE Waveform
  57. Problem with CCS for filaments
  58. UL / Distributed Load - Screen vs. CFB Winding Ratios
  59. 50W PP - KT88 Build
  60. OP Tx and PPP to PP change over
  61. I need a little more advice on a Glassware Janus shunt regularor
  62. Pentode noise
  63. Dynaco ST-35 Circuits
  64. BIG Transformer Covers - Where to Find?
  65. Amplification breaks up after some time
  66. 6A5G schematic; changes from the 6Y6G tube
  67. ECC83 differential preamp optimisation
  68. 6Y6G SE SCHEMATIC NEEDING HELP!
  69. Need help identifying this tube...
  70. AMI DD project. Someone did some mods before me and I don't know whats what.
  71. (v?)Tailor PA-500 Tube Amp
  72. Transformer arrangement?
  73. Don't be stupid, you can't possibly do that with output transformers?
  74. Maximum Plate/Screen Voltage 6550 in UL
  75. Paper insulation for output transformers?
  76. Best PP OPT 30-100W range
  77. Tripath TA2020 + 6N3 Tube buffer
  78. El34 as triode
  79. tube preamp vol ctrl -- before or after?
  80. matisse preamp -review
  81. Ribbon Microphone Preamp
  82. Looking for tubes 6CL8 pentode Triode with lower output ratings
  83. Reducing Signal Level Without Affecting Tone
  84. VTVM/VOM???
  85. Micro amp - all-tube, direct heated, portable and IT FITS
  86. Wiring a 6AS7G to be Push Pull within its own envelope
  87. Wima MKP
  88. Will this circuit work ?
  89. new amp build
  90. MKP DC-LINK vs electrolytic power supply 4 tube amp
  91. Looking for ECC81
  92. Unison Research S6 (old version) auto or fixed bias?
  93. Troubleshooting a restored Edison 12 valve amplifier
  94. Counterpoint SA-220
  95. LTSpice models needed
  96. Magnavox 6V6 amp upgrade
  97. breadboard for tubes
  98. Looking for ideas... 50W OPTs
  99. SE Power Supply PCB
  100. Speakers for the 16LS Stereo Tube Amplifier
  101. will E80CF fit into yaqin 100b
  102. RH84 Rev2 Build w/Premium parts
  103. Single ended KT88 / 6SN7 not enough power
  104. Problem with push-pull KT88
  105. opinions please!
  106. Tube testing 101?
  107. Top aluminum plate from ProtoPanel.com
  108. 6GK5/300B
  109. Screen driven sweep tubes - the return of the evil kink?
  110. Parafeed 45 amps
  111. Has anyone tried the 6p1p EV?
  112. ECC88 mu-follower
  113. Reducing gain of a WE91 type amp
  114. 6sn7 mu-follower
  115. AES Preamp mods
  116. Oh! Darling
  117. Testing 3B22 on Hickok 752a
  118. Has anyone ever used the 6C41C in PP?
  119. RH 6V6
  120. Unholtz-Dickie amp, 4-1000's
  121. Somewhat Newbie..
  122. grounding RCA inputs
  123. ESS9018 I/V
  124. Catode follower with 6N7S (6n7GT)
  125. Recommended RIAA Values for this Circuit
  126. PC board design for PSE amp
  127. Audio Research SP-11 HV Regulator
  128. heathkit SA2
  129. russian 1578 tube production years
  130. partial list of tubes I have
  131. Bench Power Supply Questions ?
  132. Identify this tube?
  133. your input - bulb / led / neon selection for short tester
  134. Potted choke orientation/amp layout
  135. Tamura F-2012
  136. Joining output windings
  137. B&K 650 tube tester
  138. 5687 LTSpice model needed
  139. Can you identify this transformer? 70V line matching?
  140. I had to post this..the 211 in all its glory!
  141. Help with preamp/driver/output setup
  142. Accident - Shorted Cathode to grid!!
  143. Correct B+ for EL84 UL PP
  144. RH807 output transformer....what did you use?
  145. Headphone tube amp with balanced output?
  146. Tube buffer with 6n1p-EV
  147. First little SE
  148. ID Nice Unknown Tube
  149. Bell and Howell Model-601
  150. what should my mulit reader be on to bias yaqin 100b
  151. Fixing an old Tandberg Huldra 6 Radio
  152. 30W sweep tube amp
  153. Atmosphère S-40 with KT88, does someone know about this amp?
  154. What happens when Output transformer max voltage (slightly) exceeded?
  155. what type is the best?
  156. Kiwame carbon resistors
  157. Rocker Switch Wiring
  158. RH6550
  159. Diodes for Marantz 8B
  160. Diodes for Marantz 8B
  161. Telefunken 2430 Opus Resistor Burnout
  162. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  163. Conrad Johnson MV40 copy and Fisher OP's
  164. Are EF86 Tubes inherently microphonic?
  165. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  166. Need a rectifier tube...
  167. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.
  168. How much spl can a triode take?
  169. Octal CCDA kit - help needed!
  170. Mod input of 6AU6/6AQ5 amp for iPod
  171. Put a tube on your PC just for fun..
  172. ST35 Cathode Feedback
  173. Series Shunt tube regulator
  174. Help ID this tube ^&$**@# lettering!
  175. Adding a db VU meter to an existing tube mic pre
  176. Quad 22 interstage cap?
  177. First test of my AX84 HI-octane
  178. 4P1L triode PP (40W!!?)
  179. KT88 shootout vintage vs new vs 90
  180. Help needed to identify this british made Amp
  181. PSU II Question
  182. Quality tube buffer with ECC83
  183. K12g Amp Question
  184. Stark 9-66 tube tester - repair help
  185. output transfo problem
  186. Pair of Fisher CA-40 Oddballs
  187. Model 601 tube amp.
  188. Model 601 Tube amp
  189. First power amp build. Is this normal??
  190. Compactronized 6146
  191. Preamp and inverter on B7G base tubes circuit.
  192. Advice and Suggestions on Amp designs
  193. Help who tube buffer x10-d
  194. EL803S-6CW5 / EL86 amp design check (schematic attached)
  195. amp buzz in one channel on inrush / power on
  196. SE 8-10W monoblock build help
  197. GlassWare Tube CAD
  198. SMD Parts and the DIYer
  199. 6CW5 / EL86 operating point
  200. RH84 power output
  201. 6n6p-ir
  202. Transformer bubbling
  203. Crackling noise.... pls help on Pre-amp
  204. RH84 amp. Plate is 300V. What voltage...
  205. Amplificator Class A 2 X EL504
  206. Help in testing 12ax7 and 7869 tubes
  207. Micro-Cap Tubes Parameters question
  208. Cathode Bypass Capacitor
  209. NOOB ALERT! sooo omany questions.....
  210. IS THIS A REAL E810F ???
  211. Chassis design question / cooling of small signal valves
  212. 5 leads pp output transformer
  213. Vote and Comment: SRPP vs. Aikido vs. Grounded Grid
  214. NEED ADVICE ON THIS SCHEMATIC AND WILL IT WOFK
  215. Help Identifying a Console Pull Amplifier
  216. sunaudio 2A3 circuit...is it good for newbie?
  217. KT120: When does it starts to sing ?
  218. Simple Time Delay (no more excuses for not having one)
  219. Cary SLP-05
  220. 6SN7 Grounded Grid
  221. input selector switch replacement help
  222. help needed with transformer wiring
  223. Tube Schematic Drawig Packages
  224. 12AU7 - 5V4G easy amplifier
  225. Glassware CCA 9-pin PDF
  226. Replacement for the tube 6922 (ECC88)?
  227. Which probes for my first scope?
  228. PP CATHODE BIAS WITH "CCS"
  229. current output tube amplifier
  230. Tube amp for a small room (newbie-like)
  231. What is this old thing from1929?
  232. Arduino cathode current HT etc
  233. Bizzare Output Transformer Connectivity...
  234. OPT to KT88?
  235. Help needed on identifing tube
  236. Amplifier circuit from tube radio
  237. Amplifier circuit from tube radio
  238. Using Valves Library in EAGLE CAD
  239. Biggest noval power pentode?
  240. Akita 12V preamp thoughts
  241. Help, what is this (Marconi 6204) ?
  242. Anyone try DHT 33 or 1Q5 Pentodes wired as Triode?
  243. Would this be a good buy?
  244. Looking for a complete DIY Tube amp
  245. Schematic by TS LIM Pre-amp
  246. Fisher Model 100 'AZ' Mono Amp Rebuild w/ Oscillations
  247. Measuring inductance
  248. Leak stereo 20
  249. Gain and gm of a QQE03/20 anyone ??
  250. Power supply options for tube amplifiers.

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