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  1. Need help with new tube for my amp
  2. Does the method for loading the plate affect gain of the stage?
  3. Slightly Sick Amplifier
  4. OP Tx for signal tubes in Headphone amps
  5. Listing of Radio Amateur/HAM Flea Markets In Europe
  6. need mac kit 30 transformer
  7. Is this transformer saturation? (pictures inside)
  8. Did I use the LR8 in this EF86 preamp correctly?
  9. Who recognizes the chassis of this amp
  10. Sweep tubes in Push-Pull-Parallel
  11. EZ125 Quad KT88 Project
  12. Need a help! OPT design assistant software
  13. Ready To Build the Other
  14. Harman Kardon Citation II
  15. Relays for tube voltages
  16. Okay, Can someone suggest if this PSU can work
  17. ELROG 211 and 845 tubes
  18. Has anyone tried this tube preamp
  19. filament choke testing
  20. Grounded-Grid MC Head Amp for 2x PC900 and Lyra Delos
  21. output transformer sizing - is there such a thing as to big?
  22. Advice for dummies...from a new to the forum dummy
  23. Counterpoint Tech
  24. Line Magnetic 211-IA: Schematic?
  25. Help with harmon kardon a50k
  26. anyone ID these Magnecord amplifiers?
  27. vintage vacuum audio site
  28. Hiraga preamp line+phono 4xECC81 SRPP
  29. Why no simple 2-stage EL34 PP amps?
  30. Dynaco MKIII mod
  31. Blown Up Sir...
  32. Leak stereo20
  33. FFT Hanning Data
  34. Elevated Filament Question
  35. what do you think about this lv linestage?
  36. PCM1798 ECC83/EL84 PP UL balanced combo
  37. I am Trying to Design this Darling Amplifier
  38. Real power pentode recommendation
  39. bridge with CT: can I do that?
  40. Who makes nice pc board for tubes ?
  41. pse300B
  42. 1948 Wireless World - 50 Watt Amp
  43. Akido preamp suggestions.
  44. 6CM5 MKII
  45. DC coupled 6P15P
  46. Switchable 45/VT-52 Amp
  47. Optransformer for 6B4G?
  48. OLSON TUBE AMP AM-158
  49. 6922 preamp idea
  50. Tube SPDIF output
  51. One power tube going hot at idle
  52. schematic to learn by
  53. Audioromy schematic
  54. 8236's
  55. Need a 4060 model on LTSpice
  56. vt86pp 6v6
  57. SALAS hv with 150V
  58. Fender Tweed Champ Kits/Parts
  59. Aikido 12Vac
  60. Looking for expertise in adjusting Williamson amp
  61. Help with elevating a heater supply
  62. Preamp EQ
  63. Need help identifying this amp
  64. Phillips FX737A Rectifier
  65. wiring a transformer on a Scott 299
  66. DC/DC stepup for valve projects
  67. 807 SE Amp
  68. HELP With VOX AC100CPH
  69. Stromberg Carlson ASR 220C blowing fuse
  70. EF806 pentode + CCS
  71. Transformer Identification
  72. Hickok 800A line adjust problem
  73. Heathkit AA 121 parts
  74. Conrad Johnson PV-8: how to convert 110v to 220v
  75. Help me understand Edcor wiring?
  76. Another paralleled to single push-pull EL84 mod.
  77. Sca35 tone controls
  78. Tube preamp noise
  79. Fountek Tube Amp
  80. Choke & Transformer Positioning Problem
  81. The adventure time tube amp- Did any catch it?
  82. Input wiring question
  83. Let's talk triode-pentode
  84. Tried failed, looking for suggestions
  85. Need HELP converting Bogen MX30a pa into a preamp for recording
  86. Edcor Wrong Transformer...
  87. 812A Build
  88. Still not sure where to start
  89. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  90. RCA tube amp woes/hum/ground
  91. EF86 microphony
  92. John Broskie Kits
  93. Refurbish Conrad Johnson Premier Eight
  94. 4tube Philco amp project...
  95. Thoughts on bias for PPP
  96. 2012's Acquired Parts- ..Custom Build Anyone?
  97. Can I use a variable voltage cieling fan switch as a variac?
  98. Audio research LS2 hiss and hum... need help
  99. saba electro sound
  100. Ra on C3g and 6C45pi?
  101. Partial Feedback System
  102. An Electronic Loss Compressor
  103. K-12g one channel louder than the other
  104. Sun SV2a3 or 45?
  105. Red imP(asse)
  106. An application of C-Vac: the SolidGlass amplifier
  107. Fixing crooked laminate stacks?
  108. EF184 driver
  109. Woo Audio WA7 temperature
  110. Resistor w/cap or LED or battery bias?
  111. Transformers Back to back vs. Voltage Doubler
  112. 211: 75W or 100W?
  113. Does really need a balanced preamp ?
  114. Power Transformer Hum
  115. Options for how to use this old tube PA amp? > 200W
  116. Flash getter question
  117. Heath W4 Output Xfmr - anyone measure one??
  118. Tube buffer with 6n3-EV
  119. First time with hi-fi, need some advise with amp desing
  120. Newbie wants to build SET 6C33C
  121. Another PP GU50
  122. SE Waveform
  123. Problem with CCS for filaments
  124. UL / Distributed Load - Screen vs. CFB Winding Ratios
  125. 50W PP - KT88 Build
  126. OP Tx and PPP to PP change over
  127. I need a little more advice on a Glassware Janus shunt regularor
  128. Pentode noise
  129. Dynaco ST-35 Circuits
  130. BIG Transformer Covers - Where to Find?
  131. Amplification breaks up after some time
  132. 6A5G schematic; changes from the 6Y6G tube
  133. ECC83 differential preamp optimisation
  134. 6Y6G SE SCHEMATIC NEEDING HELP!
  135. Need help identifying this tube...
  136. AMI DD project. Someone did some mods before me and I don't know whats what.
  137. (v?)Tailor PA-500 Tube Amp
  138. Transformer arrangement?
  139. Don't be stupid, you can't possibly do that with output transformers?
  140. Maximum Plate/Screen Voltage 6550 in UL
  141. Paper insulation for output transformers?
  142. Best PP OPT 30-100W range
  143. Tripath TA2020 + 6N3 Tube buffer
  144. El34 as triode
  145. tube preamp vol ctrl -- before or after?
  146. matisse preamp -review
  147. Ribbon Microphone Preamp
  148. Looking for tubes 6CL8 pentode Triode with lower output ratings
  149. Reducing Signal Level Without Affecting Tone
  150. VTVM/VOM???
  151. Micro amp - all-tube, direct heated, portable and IT FITS
  152. Wiring a 6AS7G to be Push Pull within its own envelope
  153. Wima MKP
  154. Will this circuit work ?
  155. new amp build
  156. MKP DC-LINK vs electrolytic power supply 4 tube amp
  157. Looking for ECC81
  158. Unison Research S6 (old version) auto or fixed bias?
  159. Troubleshooting a restored Edison 12 valve amplifier
  160. Counterpoint SA-220
  161. LTSpice models needed
  162. Magnavox 6V6 amp upgrade
  163. breadboard for tubes
  164. Looking for ideas... 50W OPTs
  165. SE Power Supply PCB
  166. Speakers for the 16LS Stereo Tube Amplifier
  167. will E80CF fit into yaqin 100b
  168. RH84 Rev2 Build w/Premium parts
  169. Single ended KT88 / 6SN7 not enough power
  170. Problem with push-pull KT88
  171. opinions please!
  172. Tube testing 101?
  173. Top aluminum plate from ProtoPanel.com
  174. 6GK5/300B
  175. Screen driven sweep tubes - the return of the evil kink?
  176. Parafeed 45 amps
  177. Has anyone tried the 6p1p EV?
  178. ECC88 mu-follower
  179. Reducing gain of a WE91 type amp
  180. 6sn7 mu-follower
  181. AES Preamp mods
  182. Oh! Darling
  183. Testing 3B22 on Hickok 752a
  184. Has anyone ever used the 6C41C in PP?
  185. RH 6V6
  186. Unholtz-Dickie amp, 4-1000's
  187. Somewhat Newbie..
  188. grounding RCA inputs
  189. ESS9018 I/V
  190. Catode follower with 6N7S (6n7GT)
  191. Recommended RIAA Values for this Circuit
  192. PC board design for PSE amp
  193. Audio Research SP-11 HV Regulator
  194. heathkit SA2
  195. russian 1578 tube production years
  196. partial list of tubes I have
  197. Bench Power Supply Questions ?
  198. Identify this tube?
  199. your input - bulb / led / neon selection for short tester
  200. Potted choke orientation/amp layout
  201. Tamura F-2012
  202. Joining output windings
  203. B&K 650 tube tester
  204. 5687 LTSpice model needed
  205. Can you identify this transformer? 70V line matching?
  206. I had to post this..the 211 in all its glory!
  207. Help with preamp/driver/output setup
  208. Accident - Shorted Cathode to grid!!
  209. Correct B+ for EL84 UL PP
  210. RH807 output transformer....what did you use?
  211. Headphone tube amp with balanced output?
  212. Tube buffer with 6n1p-EV
  213. First little SE
  214. ID Nice Unknown Tube
  215. Bell and Howell Model-601
  216. what should my mulit reader be on to bias yaqin 100b
  217. Fixing an old Tandberg Huldra 6 Radio
  218. 30W sweep tube amp
  219. Atmosphère S-40 with KT88, does someone know about this amp?
  220. What happens when Output transformer max voltage (slightly) exceeded?
  221. what type is the best?
  222. Kiwame carbon resistors
  223. Rocker Switch Wiring
  224. RH6550
  225. Diodes for Marantz 8B
  226. Diodes for Marantz 8B
  227. Telefunken 2430 Opus Resistor Burnout
  228. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  229. Conrad Johnson MV40 copy and Fisher OP's
  230. Are EF86 Tubes inherently microphonic?
  231. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  232. Need a rectifier tube...
  233. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.
  234. How much spl can a triode take?
  235. Octal CCDA kit - help needed!
  236. Mod input of 6AU6/6AQ5 amp for iPod
  237. Put a tube on your PC just for fun..
  238. ST35 Cathode Feedback
  239. Series Shunt tube regulator
  240. Help ID this tube ^&$**@# lettering!
  241. Adding a db VU meter to an existing tube mic pre
  242. Quad 22 interstage cap?
  243. First test of my AX84 HI-octane
  244. 4P1L triode PP (40W!!?)
  245. KT88 shootout vintage vs new vs 90
  246. Help needed to identify this british made Amp
  247. PSU II Question
  248. Quality tube buffer with ECC83
  249. K12g Amp Question
  250. Stark 9-66 tube tester - repair help

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