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  1. OLSON TUBE AMP AM-158
  2. 6922 preamp idea
  3. Tube SPDIF output
  4. One power tube going hot at idle
  5. schematic to learn by
  6. Audioromy schematic
  7. 8236's
  8. Need a 4060 model on LTSpice
  9. vt86pp 6v6
  10. SALAS hv with 150V
  11. Aikido 12Vac
  12. Looking for expertise in adjusting Williamson amp
  13. Help with elevating a heater supply
  14. Preamp EQ
  15. Need help identifying this amp
  16. Phillips FX737A Rectifier
  17. wiring a transformer on a Scott 299
  18. DC/DC stepup for valve projects
  19. 807 SE Amp
  20. Stromberg Carlson ASR 220C blowing fuse
  21. EF806 pentode + CCS
  22. Transformer Identification
  23. Heathkit AA 121 parts
  24. Conrad Johnson PV-8: how to convert 110v to 220v
  25. Help me understand Edcor wiring?
  26. Another paralleled to single push-pull EL84 mod.
  27. Sca35 tone controls
  28. Tube preamp noise
  29. Fountek Tube Amp
  30. Choke & Transformer Positioning Problem
  31. The adventure time tube amp- Did any catch it?
  32. Input wiring question
  33. Let's talk triode-pentode
  34. Tried failed, looking for suggestions
  35. Need HELP converting Bogen MX30a pa into a preamp for recording
  36. Edcor Wrong Transformer...
  37. 812A Build
  38. Still not sure where to start
  39. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  40. RCA tube amp woes/hum/ground
  41. EF86 microphony
  42. John Broskie Kits
  43. Refurbish Conrad Johnson Premier Eight
  44. 4tube Philco amp project...
  45. Thoughts on bias for PPP
  46. 2012's Acquired Parts- ..Custom Build Anyone?
  47. Can I use a variable voltage cieling fan switch as a variac?
  48. Audio research LS2 hiss and hum... need help
  49. saba electro sound
  50. Ra on C3g and 6C45pi?
  51. Partial Feedback System
  52. An Electronic Loss Compressor
  53. K-12g one channel louder than the other
  54. Sun SV2a3 or 45?
  55. Red imP(asse)
  56. An application of C-Vac: the SolidGlass amplifier
  57. Fixing crooked laminate stacks?
  58. EF184 driver
  59. Woo Audio WA7 temperature
  60. Resistor w/cap or LED or battery bias?
  61. Transformers Back to back vs. Voltage Doubler
  62. 211: 75W or 100W?
  63. Does really need a balanced preamp ?
  64. Power Transformer Hum
  65. Options for how to use this old tube PA amp? > 200W
  66. Flash getter question
  67. Heath W4 Output Xfmr - anyone measure one??
  68. Tube buffer with 6n3-EV
  69. First time with hi-fi, need some advise with amp desing
  70. Newbie wants to build SET 6C33C
  71. Another PP GU50
  72. SE Waveform
  73. Problem with CCS for filaments
  74. UL / Distributed Load - Screen vs. CFB Winding Ratios
  75. 50W PP - KT88 Build
  76. OP Tx and PPP to PP change over
  77. I need a little more advice on a Glassware Janus shunt regularor
  78. Pentode noise
  79. Dynaco ST-35 Circuits
  80. BIG Transformer Covers - Where to Find?
  81. Amplification breaks up after some time
  82. 6A5G schematic; changes from the 6Y6G tube
  83. ECC83 differential preamp optimisation
  84. 6Y6G SE SCHEMATIC NEEDING HELP!
  85. Need help identifying this tube...
  86. AMI DD project. Someone did some mods before me and I don't know whats what.
  87. (v?)Tailor PA-500 Tube Amp
  88. Transformer arrangement?
  89. Don't be stupid, you can't possibly do that with output transformers?
  90. Maximum Plate/Screen Voltage 6550 in UL
  91. Paper insulation for output transformers?
  92. Best PP OPT 30-100W range
  93. Tripath TA2020 + 6N3 Tube buffer
  94. El34 as triode
  95. tube preamp vol ctrl -- before or after?
  96. matisse preamp -review
  97. Ribbon Microphone Preamp
  98. Looking for tubes 6CL8 pentode Triode with lower output ratings
  99. Reducing Signal Level Without Affecting Tone
  100. VTVM/VOM???
  101. Micro amp - all-tube, direct heated, portable and IT FITS
  102. Wiring a 6AS7G to be Push Pull within its own envelope
  103. Wima MKP
  104. Will this circuit work ?
  105. new amp build
  106. Looking for ECC81
  107. Unison Research S6 (old version) auto or fixed bias?
  108. Troubleshooting a restored Edison 12 valve amplifier
  109. Counterpoint SA-220
  110. LTSpice models needed
  111. Magnavox 6V6 amp upgrade
  112. breadboard for tubes
  113. Looking for ideas... 50W OPTs
  114. SE Power Supply PCB
  115. Speakers for the 16LS Stereo Tube Amplifier
  116. will E80CF fit into yaqin 100b
  117. RH84 Rev2 Build w/Premium parts
  118. Single ended KT88 / 6SN7 not enough power
  119. Problem with push-pull KT88
  120. opinions please!
  121. Tube testing 101?
  122. Top aluminum plate from ProtoPanel.com
  123. 6GK5/300B
  124. Screen driven sweep tubes - the return of the evil kink?
  125. Parafeed 45 amps
  126. Has anyone tried the 6p1p EV?
  127. ECC88 mu-follower
  128. Reducing gain of a WE91 type amp
  129. 6sn7 mu-follower
  130. AES Preamp mods
  131. Oh! Darling
  132. Has anyone ever used the 6C41C in PP?
  133. RH 6V6
  134. Unholtz-Dickie amp, 4-1000's
  135. Somewhat Newbie..
  136. grounding RCA inputs
  137. ESS9018 I/V
  138. Catode follower with 6N7S (6n7GT)
  139. Recommended RIAA Values for this Circuit
  140. PC board design for PSE amp
  141. Audio Research SP-11 HV Regulator
  142. heathkit SA2
  143. russian 1578 tube production years
  144. partial list of tubes I have
  145. Bench Power Supply Questions ?
  146. Identify this tube?
  147. your input - bulb / led / neon selection for short tester
  148. Potted choke orientation/amp layout
  149. Tamura F-2012
  150. Joining output windings
  151. 5687 LTSpice model needed
  152. Can you identify this transformer? 70V line matching?
  153. I had to post this..the 211 in all its glory!
  154. Help with preamp/driver/output setup
  155. Accident - Shorted Cathode to grid!!
  156. Correct B+ for EL84 UL PP
  157. RH807 output transformer....what did you use?
  158. Headphone tube amp with balanced output?
  159. Tube buffer with 6n1p-EV
  160. First little SE
  161. ID Nice Unknown Tube
  162. Bell and Howell Model-601
  163. what should my mulit reader be on to bias yaqin 100b
  164. Fixing an old Tandberg Huldra 6 Radio
  165. 30W sweep tube amp
  166. Atmosphère S-40 with KT88, does someone know about this amp?
  167. What happens when Output transformer max voltage (slightly) exceeded?
  168. what type is the best?
  169. Kiwame carbon resistors
  170. Rocker Switch Wiring
  171. RH6550
  172. Diodes for Marantz 8B
  173. Diodes for Marantz 8B
  174. Telefunken 2430 Opus Resistor Burnout
  175. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  176. Conrad Johnson MV40 copy and Fisher OP's
  177. Are EF86 Tubes inherently microphonic?
  178. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  179. Need a rectifier tube...
  180. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.
  181. How much spl can a triode take?
  182. Octal CCDA kit - help needed!
  183. Mod input of 6AU6/6AQ5 amp for iPod
  184. Put a tube on your PC just for fun..
  185. ST35 Cathode Feedback
  186. Series Shunt tube regulator
  187. Help ID this tube ^&$**@# lettering!
  188. Adding a db VU meter to an existing tube mic pre
  189. Quad 22 interstage cap?
  190. 4P1L triode PP (40W!!?)
  191. KT88 shootout vintage vs new vs 90
  192. Help needed to identify this british made Amp
  193. PSU II Question
  194. Quality tube buffer with ECC83
  195. K12g Amp Question
  196. output transfo problem
  197. Pair of Fisher CA-40 Oddballs
  198. Model 601 tube amp.
  199. Model 601 Tube amp
  200. First power amp build. Is this normal??
  201. Compactronized 6146
  202. Preamp and inverter on B7G base tubes circuit.
  203. Advice and Suggestions on Amp designs
  204. Help who tube buffer x10-d
  205. EL803S-6CW5 / EL86 amp design check (schematic attached)
  206. amp buzz in one channel on inrush / power on
  207. SE 8-10W monoblock build help
  208. GlassWare Tube CAD
  209. SMD Parts and the DIYer
  210. 6CW5 / EL86 operating point
  211. RH84 power output
  212. 6n6p-ir
  213. Transformer bubbling
  214. Crackling noise.... pls help on Pre-amp
  215. RH84 amp. Plate is 300V. What voltage...
  216. Amplificator Class A 2 X EL504
  217. Help in testing 12ax7 and 7869 tubes
  218. Micro-Cap Tubes Parameters question
  219. Cathode Bypass Capacitor
  220. NOOB ALERT! sooo omany questions.....
  221. IS THIS A REAL E810F ???
  222. Chassis design question / cooling of small signal valves
  223. 5 leads pp output transformer
  224. Vote and Comment: SRPP vs. Aikido vs. Grounded Grid
  225. NEED ADVICE ON THIS SCHEMATIC AND WILL IT WOFK
  226. Help Identifying a Console Pull Amplifier
  227. sunaudio 2A3 circuit...is it good for newbie?
  228. KT120: When does it starts to sing ?
  229. Simple Time Delay (no more excuses for not having one)
  230. Cary SLP-05
  231. 6SN7 Grounded Grid
  232. input selector switch replacement help
  233. help needed with transformer wiring
  234. Tube Schematic Drawig Packages
  235. 12AU7 - 5V4G easy amplifier
  236. Glassware CCA 9-pin PDF
  237. Replacement for the tube 6922 (ECC88)?
  238. Which probes for my first scope?
  239. PP CATHODE BIAS WITH "CCS"
  240. current output tube amplifier
  241. Tube amp for a small room (newbie-like)
  242. What is this old thing from1929?
  243. Arduino cathode current HT etc
  244. Bizzare Output Transformer Connectivity...
  245. OPT to KT88?
  246. Help needed on identifing tube
  247. Amplifier circuit from tube radio
  248. Amplifier circuit from tube radio
  249. Using Valves Library in EAGLE CAD
  250. Biggest noval power pentode?

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