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  1. Line Magnetic 211-IA: Schematic?
  2. Help with harmon kardon a50k
  3. anyone ID these Magnecord amplifiers?
  4. vintage vacuum audio site
  5. Hiraga preamp line+phono 4xECC81 SRPP
  6. Why no simple 2-stage EL34 PP amps?
  7. Dynaco MKIII mod
  8. Blown Up Sir...
  9. Leak stereo20
  10. FFT Hanning Data
  11. Elevated Filament Question
  12. what do you think about this lv linestage?
  13. PCM1798 ECC83/EL84 PP UL balanced combo
  14. I am Trying to Design this Darling Amplifier
  15. Real power pentode recommendation
  16. bridge with CT: can I do that?
  17. Who makes nice pc board for tubes ?
  18. pse300B
  19. 1948 Wireless World - 50 Watt Amp
  20. Akido preamp suggestions.
  21. 6CM5 MKII
  22. DC coupled 6P15P
  23. Switchable 45/VT-52 Amp
  24. Optransformer for 6B4G?
  25. OLSON TUBE AMP AM-158
  26. 6922 preamp idea
  27. Tube SPDIF output
  28. One power tube going hot at idle
  29. schematic to learn by
  30. Audioromy schematic
  31. 8236's
  32. Need a 4060 model on LTSpice
  33. vt86pp 6v6
  34. SALAS hv with 150V
  35. Aikido 12Vac
  36. Looking for expertise in adjusting Williamson amp
  37. Help with elevating a heater supply
  38. Preamp EQ
  39. Need help identifying this amp
  40. Phillips FX737A Rectifier
  41. wiring a transformer on a Scott 299
  42. DC/DC stepup for valve projects
  43. 807 SE Amp
  44. Stromberg Carlson ASR 220C blowing fuse
  45. EF806 pentode + CCS
  46. Transformer Identification
  47. Hickok 800A line adjust problem
  48. Heathkit AA 121 parts
  49. Conrad Johnson PV-8: how to convert 110v to 220v
  50. Help me understand Edcor wiring?
  51. Another paralleled to single push-pull EL84 mod.
  52. Sca35 tone controls
  53. Tube preamp noise
  54. Fountek Tube Amp
  55. Choke & Transformer Positioning Problem
  56. The adventure time tube amp- Did any catch it?
  57. Input wiring question
  58. Let's talk triode-pentode
  59. Tried failed, looking for suggestions
  60. Need HELP converting Bogen MX30a pa into a preamp for recording
  61. Edcor Wrong Transformer...
  62. 812A Build
  63. Still not sure where to start
  64. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  65. RCA tube amp woes/hum/ground
  66. EF86 microphony
  67. John Broskie Kits
  68. Refurbish Conrad Johnson Premier Eight
  69. 4tube Philco amp project...
  70. Thoughts on bias for PPP
  71. 2012's Acquired Parts- ..Custom Build Anyone?
  72. Can I use a variable voltage cieling fan switch as a variac?
  73. Audio research LS2 hiss and hum... need help
  74. saba electro sound
  75. Ra on C3g and 6C45pi?
  76. Partial Feedback System
  77. An Electronic Loss Compressor
  78. K-12g one channel louder than the other
  79. Sun SV2a3 or 45?
  80. Red imP(asse)
  81. An application of C-Vac: the SolidGlass amplifier
  82. Fixing crooked laminate stacks?
  83. EF184 driver
  84. Woo Audio WA7 temperature
  85. Resistor w/cap or LED or battery bias?
  86. Transformers Back to back vs. Voltage Doubler
  87. 211: 75W or 100W?
  88. Does really need a balanced preamp ?
  89. Power Transformer Hum
  90. Options for how to use this old tube PA amp? > 200W
  91. Flash getter question
  92. Heath W4 Output Xfmr - anyone measure one??
  93. Tube buffer with 6n3-EV
  94. First time with hi-fi, need some advise with amp desing
  95. Newbie wants to build SET 6C33C
  96. Another PP GU50
  97. SE Waveform
  98. Problem with CCS for filaments
  99. UL / Distributed Load - Screen vs. CFB Winding Ratios
  100. 50W PP - KT88 Build
  101. OP Tx and PPP to PP change over
  102. I need a little more advice on a Glassware Janus shunt regularor
  103. Pentode noise
  104. Dynaco ST-35 Circuits
  105. BIG Transformer Covers - Where to Find?
  106. Amplification breaks up after some time
  107. 6A5G schematic; changes from the 6Y6G tube
  108. ECC83 differential preamp optimisation
  109. 6Y6G SE SCHEMATIC NEEDING HELP!
  110. Need help identifying this tube...
  111. AMI DD project. Someone did some mods before me and I don't know whats what.
  112. (v?)Tailor PA-500 Tube Amp
  113. Transformer arrangement?
  114. Don't be stupid, you can't possibly do that with output transformers?
  115. Maximum Plate/Screen Voltage 6550 in UL
  116. Paper insulation for output transformers?
  117. Best PP OPT 30-100W range
  118. Tripath TA2020 + 6N3 Tube buffer
  119. El34 as triode
  120. tube preamp vol ctrl -- before or after?
  121. matisse preamp -review
  122. Ribbon Microphone Preamp
  123. Looking for tubes 6CL8 pentode Triode with lower output ratings
  124. Reducing Signal Level Without Affecting Tone
  125. VTVM/VOM???
  126. Micro amp - all-tube, direct heated, portable and IT FITS
  127. Wiring a 6AS7G to be Push Pull within its own envelope
  128. Wima MKP
  129. Will this circuit work ?
  130. new amp build
  131. Looking for ECC81
  132. Unison Research S6 (old version) auto or fixed bias?
  133. Troubleshooting a restored Edison 12 valve amplifier
  134. Counterpoint SA-220
  135. LTSpice models needed
  136. Magnavox 6V6 amp upgrade
  137. breadboard for tubes
  138. Looking for ideas... 50W OPTs
  139. SE Power Supply PCB
  140. Speakers for the 16LS Stereo Tube Amplifier
  141. will E80CF fit into yaqin 100b
  142. RH84 Rev2 Build w/Premium parts
  143. Single ended KT88 / 6SN7 not enough power
  144. Problem with push-pull KT88
  145. opinions please!
  146. Tube testing 101?
  147. Top aluminum plate from ProtoPanel.com
  148. 6GK5/300B
  149. Screen driven sweep tubes - the return of the evil kink?
  150. Parafeed 45 amps
  151. Has anyone tried the 6p1p EV?
  152. ECC88 mu-follower
  153. Reducing gain of a WE91 type amp
  154. 6sn7 mu-follower
  155. AES Preamp mods
  156. Oh! Darling
  157. Testing 3B22 on Hickok 752a
  158. Has anyone ever used the 6C41C in PP?
  159. RH 6V6
  160. Unholtz-Dickie amp, 4-1000's
  161. Somewhat Newbie..
  162. grounding RCA inputs
  163. ESS9018 I/V
  164. Catode follower with 6N7S (6n7GT)
  165. Recommended RIAA Values for this Circuit
  166. PC board design for PSE amp
  167. Audio Research SP-11 HV Regulator
  168. heathkit SA2
  169. russian 1578 tube production years
  170. partial list of tubes I have
  171. Bench Power Supply Questions ?
  172. Identify this tube?
  173. your input - bulb / led / neon selection for short tester
  174. Potted choke orientation/amp layout
  175. Tamura F-2012
  176. Joining output windings
  177. B&K 650 tube tester
  178. 5687 LTSpice model needed
  179. Can you identify this transformer? 70V line matching?
  180. I had to post this..the 211 in all its glory!
  181. Help with preamp/driver/output setup
  182. Accident - Shorted Cathode to grid!!
  183. Correct B+ for EL84 UL PP
  184. RH807 output transformer....what did you use?
  185. Headphone tube amp with balanced output?
  186. Tube buffer with 6n1p-EV
  187. First little SE
  188. ID Nice Unknown Tube
  189. Bell and Howell Model-601
  190. what should my mulit reader be on to bias yaqin 100b
  191. Fixing an old Tandberg Huldra 6 Radio
  192. 30W sweep tube amp
  193. Atmosphère S-40 with KT88, does someone know about this amp?
  194. What happens when Output transformer max voltage (slightly) exceeded?
  195. what type is the best?
  196. Kiwame carbon resistors
  197. Rocker Switch Wiring
  198. RH6550
  199. Diodes for Marantz 8B
  200. Diodes for Marantz 8B
  201. Telefunken 2430 Opus Resistor Burnout
  202. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  203. Conrad Johnson MV40 copy and Fisher OP's
  204. Are EF86 Tubes inherently microphonic?
  205. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  206. Need a rectifier tube...
  207. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.
  208. How much spl can a triode take?
  209. Octal CCDA kit - help needed!
  210. Mod input of 6AU6/6AQ5 amp for iPod
  211. Put a tube on your PC just for fun..
  212. ST35 Cathode Feedback
  213. Series Shunt tube regulator
  214. Help ID this tube ^&$**@# lettering!
  215. Adding a db VU meter to an existing tube mic pre
  216. Quad 22 interstage cap?
  217. 4P1L triode PP (40W!!?)
  218. KT88 shootout vintage vs new vs 90
  219. Help needed to identify this british made Amp
  220. PSU II Question
  221. Quality tube buffer with ECC83
  222. K12g Amp Question
  223. Stark 9-66 tube tester - repair help
  224. output transfo problem
  225. Pair of Fisher CA-40 Oddballs
  226. Model 601 tube amp.
  227. Model 601 Tube amp
  228. First power amp build. Is this normal??
  229. Compactronized 6146
  230. Preamp and inverter on B7G base tubes circuit.
  231. Advice and Suggestions on Amp designs
  232. Help who tube buffer x10-d
  233. EL803S-6CW5 / EL86 amp design check (schematic attached)
  234. amp buzz in one channel on inrush / power on
  235. SE 8-10W monoblock build help
  236. GlassWare Tube CAD
  237. SMD Parts and the DIYer
  238. 6CW5 / EL86 operating point
  239. RH84 power output
  240. 6n6p-ir
  241. Transformer bubbling
  242. Crackling noise.... pls help on Pre-amp
  243. RH84 amp. Plate is 300V. What voltage...
  244. Amplificator Class A 2 X EL504
  245. Help in testing 12ax7 and 7869 tubes
  246. Micro-Cap Tubes Parameters question
  247. Cathode Bypass Capacitor
  248. NOOB ALERT! sooo omany questions.....
  249. IS THIS A REAL E810F ???
  250. Chassis design question / cooling of small signal valves

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