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  1. Help with elevating a heater supply
  2. Preamp EQ
  3. Need help identifying this amp
  4. Phillips FX737A Rectifier
  5. wiring a transformer on a Scott 299
  6. DC/DC stepup for valve projects
  7. 807 SE Amp
  8. HELP With VOX AC100CPH
  9. Stromberg Carlson ASR 220C blowing fuse
  10. EF806 pentode + CCS
  11. Transformer Identification
  12. Hickok 800A line adjust problem
  13. Heathkit AA 121 parts
  14. Conrad Johnson PV-8: how to convert 110v to 220v
  15. Help me understand Edcor wiring?
  16. Another paralleled to single push-pull EL84 mod.
  17. Sca35 tone controls
  18. Tube preamp noise
  19. Fountek Tube Amp
  20. Choke & Transformer Positioning Problem
  21. The adventure time tube amp- Did any catch it?
  22. Input wiring question
  23. Let's talk triode-pentode
  24. Tried failed, looking for suggestions
  25. Need HELP converting Bogen MX30a pa into a preamp for recording
  26. Edcor Wrong Transformer...
  27. 812A Build
  28. Still not sure where to start
  29. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  30. RCA tube amp woes/hum/ground
  31. EF86 microphony
  32. John Broskie Kits
  33. Refurbish Conrad Johnson Premier Eight
  34. 4tube Philco amp project...
  35. Thoughts on bias for PPP
  36. 2012's Acquired Parts- ..Custom Build Anyone?
  37. Can I use a variable voltage cieling fan switch as a variac?
  38. Audio research LS2 hiss and hum... need help
  39. saba electro sound
  40. Ra on C3g and 6C45pi?
  41. Partial Feedback System
  42. An Electronic Loss Compressor
  43. K-12g one channel louder than the other
  44. Sun SV2a3 or 45?
  45. Red imP(asse)
  46. An application of C-Vac: the SolidGlass amplifier
  47. Fixing crooked laminate stacks?
  48. EF184 driver
  49. Woo Audio WA7 temperature
  50. Resistor w/cap or LED or battery bias?
  51. Transformers Back to back vs. Voltage Doubler
  52. 211: 75W or 100W?
  53. Does really need a balanced preamp ?
  54. Power Transformer Hum
  55. Options for how to use this old tube PA amp? > 200W
  56. Flash getter question
  57. Heath W4 Output Xfmr - anyone measure one??
  58. Tube buffer with 6n3-EV
  59. First time with hi-fi, need some advise with amp desing
  60. Newbie wants to build SET 6C33C
  61. Another PP GU50
  62. SE Waveform
  63. Problem with CCS for filaments
  64. UL / Distributed Load - Screen vs. CFB Winding Ratios
  65. 50W PP - KT88 Build
  66. OP Tx and PPP to PP change over
  67. I need a little more advice on a Glassware Janus shunt regularor
  68. Pentode noise
  69. Dynaco ST-35 Circuits
  70. BIG Transformer Covers - Where to Find?
  71. Amplification breaks up after some time
  72. 6A5G schematic; changes from the 6Y6G tube
  73. ECC83 differential preamp optimisation
  74. 6Y6G SE SCHEMATIC NEEDING HELP!
  75. Need help identifying this tube...
  76. AMI DD project. Someone did some mods before me and I don't know whats what.
  77. (v?)Tailor PA-500 Tube Amp
  78. Transformer arrangement?
  79. Don't be stupid, you can't possibly do that with output transformers?
  80. Maximum Plate/Screen Voltage 6550 in UL
  81. Paper insulation for output transformers?
  82. Best PP OPT 30-100W range
  83. Tripath TA2020 + 6N3 Tube buffer
  84. El34 as triode
  85. tube preamp vol ctrl -- before or after?
  86. matisse preamp -review
  87. Ribbon Microphone Preamp
  88. Looking for tubes 6CL8 pentode Triode with lower output ratings
  89. Reducing Signal Level Without Affecting Tone
  90. VTVM/VOM???
  91. Micro amp - all-tube, direct heated, portable and IT FITS
  92. Wiring a 6AS7G to be Push Pull within its own envelope
  93. Wima MKP
  94. Will this circuit work ?
  95. new amp build
  96. MKP DC-LINK vs electrolytic power supply 4 tube amp
  97. Looking for ECC81
  98. Unison Research S6 (old version) auto or fixed bias?
  99. Troubleshooting a restored Edison 12 valve amplifier
  100. Counterpoint SA-220
  101. LTSpice models needed
  102. Magnavox 6V6 amp upgrade
  103. breadboard for tubes
  104. Looking for ideas... 50W OPTs
  105. SE Power Supply PCB
  106. Speakers for the 16LS Stereo Tube Amplifier
  107. will E80CF fit into yaqin 100b
  108. RH84 Rev2 Build w/Premium parts
  109. Single ended KT88 / 6SN7 not enough power
  110. Problem with push-pull KT88
  111. opinions please!
  112. Tube testing 101?
  113. Top aluminum plate from ProtoPanel.com
  114. 6GK5/300B
  115. Screen driven sweep tubes - the return of the evil kink?
  116. Parafeed 45 amps
  117. Has anyone tried the 6p1p EV?
  118. ECC88 mu-follower
  119. Reducing gain of a WE91 type amp
  120. 6sn7 mu-follower
  121. AES Preamp mods
  122. Oh! Darling
  123. Testing 3B22 on Hickok 752a
  124. Has anyone ever used the 6C41C in PP?
  125. RH 6V6
  126. Unholtz-Dickie amp, 4-1000's
  127. Somewhat Newbie..
  128. grounding RCA inputs
  129. ESS9018 I/V
  130. Catode follower with 6N7S (6n7GT)
  131. Recommended RIAA Values for this Circuit
  132. PC board design for PSE amp
  133. Audio Research SP-11 HV Regulator
  134. heathkit SA2
  135. russian 1578 tube production years
  136. partial list of tubes I have
  137. Bench Power Supply Questions ?
  138. Identify this tube?
  139. your input - bulb / led / neon selection for short tester
  140. Potted choke orientation/amp layout
  141. Tamura F-2012
  142. Joining output windings
  143. B&K 650 tube tester
  144. 5687 LTSpice model needed
  145. Can you identify this transformer? 70V line matching?
  146. I had to post this..the 211 in all its glory!
  147. Help with preamp/driver/output setup
  148. Accident - Shorted Cathode to grid!!
  149. Correct B+ for EL84 UL PP
  150. RH807 output transformer....what did you use?
  151. Headphone tube amp with balanced output?
  152. Tube buffer with 6n1p-EV
  153. First little SE
  154. ID Nice Unknown Tube
  155. Bell and Howell Model-601
  156. what should my mulit reader be on to bias yaqin 100b
  157. Fixing an old Tandberg Huldra 6 Radio
  158. 30W sweep tube amp
  159. Atmosphère S-40 with KT88, does someone know about this amp?
  160. What happens when Output transformer max voltage (slightly) exceeded?
  161. what type is the best?
  162. Kiwame carbon resistors
  163. Rocker Switch Wiring
  164. RH6550
  165. Diodes for Marantz 8B
  166. Diodes for Marantz 8B
  167. Telefunken 2430 Opus Resistor Burnout
  168. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  169. Conrad Johnson MV40 copy and Fisher OP's
  170. Are EF86 Tubes inherently microphonic?
  171. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  172. Need a rectifier tube...
  173. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.
  174. How much spl can a triode take?
  175. Octal CCDA kit - help needed!
  176. Mod input of 6AU6/6AQ5 amp for iPod
  177. Put a tube on your PC just for fun..
  178. ST35 Cathode Feedback
  179. Series Shunt tube regulator
  180. Help ID this tube ^&$**@# lettering!
  181. Adding a db VU meter to an existing tube mic pre
  182. Quad 22 interstage cap?
  183. First test of my AX84 HI-octane
  184. 4P1L triode PP (40W!!?)
  185. KT88 shootout vintage vs new vs 90
  186. Help needed to identify this british made Amp
  187. PSU II Question
  188. Quality tube buffer with ECC83
  189. K12g Amp Question
  190. Stark 9-66 tube tester - repair help
  191. output transfo problem
  192. Pair of Fisher CA-40 Oddballs
  193. Model 601 tube amp.
  194. Model 601 Tube amp
  195. First power amp build. Is this normal??
  196. Compactronized 6146
  197. Preamp and inverter on B7G base tubes circuit.
  198. Advice and Suggestions on Amp designs
  199. Help who tube buffer x10-d
  200. EL803S-6CW5 / EL86 amp design check (schematic attached)
  201. amp buzz in one channel on inrush / power on
  202. SE 8-10W monoblock build help
  203. GlassWare Tube CAD
  204. SMD Parts and the DIYer
  205. 6CW5 / EL86 operating point
  206. RH84 power output
  207. 6n6p-ir
  208. Transformer bubbling
  209. Crackling noise.... pls help on Pre-amp
  210. RH84 amp. Plate is 300V. What voltage...
  211. Amplificator Class A 2 X EL504
  212. Help in testing 12ax7 and 7869 tubes
  213. Micro-Cap Tubes Parameters question
  214. Cathode Bypass Capacitor
  215. NOOB ALERT! sooo omany questions.....
  216. IS THIS A REAL E810F ???
  217. Chassis design question / cooling of small signal valves
  218. 5 leads pp output transformer
  219. Vote and Comment: SRPP vs. Aikido vs. Grounded Grid
  220. NEED ADVICE ON THIS SCHEMATIC AND WILL IT WOFK
  221. Help Identifying a Console Pull Amplifier
  222. sunaudio 2A3 circuit...is it good for newbie?
  223. KT120: When does it starts to sing ?
  224. Simple Time Delay (no more excuses for not having one)
  225. Cary SLP-05
  226. 6SN7 Grounded Grid
  227. input selector switch replacement help
  228. help needed with transformer wiring
  229. Tube Schematic Drawig Packages
  230. 12AU7 - 5V4G easy amplifier
  231. Glassware CCA 9-pin PDF
  232. Replacement for the tube 6922 (ECC88)?
  233. Which probes for my first scope?
  234. PP CATHODE BIAS WITH "CCS"
  235. current output tube amplifier
  236. Tube amp for a small room (newbie-like)
  237. What is this old thing from1929?
  238. Arduino cathode current HT etc
  239. Bizzare Output Transformer Connectivity...
  240. OPT to KT88?
  241. Help needed on identifing tube
  242. Amplifier circuit from tube radio
  243. Amplifier circuit from tube radio
  244. Using Valves Library in EAGLE CAD
  245. Biggest noval power pentode?
  246. Akita 12V preamp thoughts
  247. Help, what is this (Marconi 6204) ?
  248. Anyone try DHT 33 or 1Q5 Pentodes wired as Triode?
  249. Would this be a good buy?
  250. Looking for a complete DIY Tube amp

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