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  1. Real power pentode recommendation
  2. bridge with CT: can I do that?
  3. Who makes nice pc board for tubes ?
  4. pse300B
  5. 1948 Wireless World - 50 Watt Amp
  6. Akido preamp suggestions.
  7. 6CM5 MKII
  8. DC coupled 6P15P
  9. Switchable 45/VT-52 Amp
  10. Optransformer for 6B4G?
  11. OLSON TUBE AMP AM-158
  12. 6922 preamp idea
  13. Tube SPDIF output
  14. One power tube going hot at idle
  15. schematic to learn by
  16. Audioromy schematic
  17. 8236's
  18. Need a 4060 model on LTSpice
  19. vt86pp 6v6
  20. SALAS hv with 150V
  21. Fender Tweed Champ Kits/Parts
  22. Aikido 12Vac
  23. Looking for expertise in adjusting Williamson amp
  24. Help with elevating a heater supply
  25. Preamp EQ
  26. Need help identifying this amp
  27. Phillips FX737A Rectifier
  28. wiring a transformer on a Scott 299
  29. DC/DC stepup for valve projects
  30. 807 SE Amp
  31. HELP With VOX AC100CPH
  32. Stromberg Carlson ASR 220C blowing fuse
  33. EF806 pentode + CCS
  34. Transformer Identification
  35. Hickok 800A line adjust problem
  36. Heathkit AA 121 parts
  37. Conrad Johnson PV-8: how to convert 110v to 220v
  38. Help me understand Edcor wiring?
  39. Another paralleled to single push-pull EL84 mod.
  40. Sca35 tone controls
  41. Tube preamp noise
  42. Fountek Tube Amp
  43. Choke & Transformer Positioning Problem
  44. The adventure time tube amp- Did any catch it?
  45. Input wiring question
  46. Let's talk triode-pentode
  47. Tried failed, looking for suggestions
  48. Need HELP converting Bogen MX30a pa into a preamp for recording
  49. Edcor Wrong Transformer...
  50. 812A Build
  51. Still not sure where to start
  52. Will cooling fan extend life of old caps & transformers? Or just make worse w dust?
  53. RCA tube amp woes/hum/ground
  54. EF86 microphony
  55. John Broskie Kits
  56. Refurbish Conrad Johnson Premier Eight
  57. 4tube Philco amp project...
  58. Thoughts on bias for PPP
  59. 2012's Acquired Parts- ..Custom Build Anyone?
  60. Can I use a variable voltage cieling fan switch as a variac?
  61. Audio research LS2 hiss and hum... need help
  62. saba electro sound
  63. Ra on C3g and 6C45pi?
  64. Partial Feedback System
  65. An Electronic Loss Compressor
  66. K-12g one channel louder than the other
  67. Sun SV2a3 or 45?
  68. Red imP(asse)
  69. An application of C-Vac: the SolidGlass amplifier
  70. Fixing crooked laminate stacks?
  71. EF184 driver
  72. Woo Audio WA7 temperature
  73. Resistor w/cap or LED or battery bias?
  74. Transformers Back to back vs. Voltage Doubler
  75. 211: 75W or 100W?
  76. Does really need a balanced preamp ?
  77. Power Transformer Hum
  78. Options for how to use this old tube PA amp? > 200W
  79. Flash getter question
  80. Heath W4 Output Xfmr - anyone measure one??
  81. Tube buffer with 6n3-EV
  82. First time with hi-fi, need some advise with amp desing
  83. Newbie wants to build SET 6C33C
  84. Another PP GU50
  85. SE Waveform
  86. Problem with CCS for filaments
  87. UL / Distributed Load - Screen vs. CFB Winding Ratios
  88. 50W PP - KT88 Build
  89. OP Tx and PPP to PP change over
  90. I need a little more advice on a Glassware Janus shunt regularor
  91. Pentode noise
  92. Dynaco ST-35 Circuits
  93. BIG Transformer Covers - Where to Find?
  94. Amplification breaks up after some time
  95. 6A5G schematic; changes from the 6Y6G tube
  96. ECC83 differential preamp optimisation
  97. 6Y6G SE SCHEMATIC NEEDING HELP!
  98. Need help identifying this tube...
  99. AMI DD project. Someone did some mods before me and I don't know whats what.
  100. (v?)Tailor PA-500 Tube Amp
  101. Transformer arrangement?
  102. Don't be stupid, you can't possibly do that with output transformers?
  103. Maximum Plate/Screen Voltage 6550 in UL
  104. Paper insulation for output transformers?
  105. Best PP OPT 30-100W range
  106. Tripath TA2020 + 6N3 Tube buffer
  107. El34 as triode
  108. tube preamp vol ctrl -- before or after?
  109. matisse preamp -review
  110. Ribbon Microphone Preamp
  111. Looking for tubes 6CL8 pentode Triode with lower output ratings
  112. Reducing Signal Level Without Affecting Tone
  113. VTVM/VOM???
  114. Micro amp - all-tube, direct heated, portable and IT FITS
  115. Wiring a 6AS7G to be Push Pull within its own envelope
  116. Wima MKP
  117. Will this circuit work ?
  118. new amp build
  119. MKP DC-LINK vs electrolytic power supply 4 tube amp
  120. Looking for ECC81
  121. Unison Research S6 (old version) auto or fixed bias?
  122. Troubleshooting a restored Edison 12 valve amplifier
  123. Counterpoint SA-220
  124. LTSpice models needed
  125. Magnavox 6V6 amp upgrade
  126. breadboard for tubes
  127. Looking for ideas... 50W OPTs
  128. SE Power Supply PCB
  129. Speakers for the 16LS Stereo Tube Amplifier
  130. will E80CF fit into yaqin 100b
  131. RH84 Rev2 Build w/Premium parts
  132. Single ended KT88 / 6SN7 not enough power
  133. Problem with push-pull KT88
  134. opinions please!
  135. Tube testing 101?
  136. Top aluminum plate from ProtoPanel.com
  137. 6GK5/300B
  138. Screen driven sweep tubes - the return of the evil kink?
  139. Parafeed 45 amps
  140. Has anyone tried the 6p1p EV?
  141. ECC88 mu-follower
  142. Reducing gain of a WE91 type amp
  143. 6sn7 mu-follower
  144. AES Preamp mods
  145. Oh! Darling
  146. Testing 3B22 on Hickok 752a
  147. Has anyone ever used the 6C41C in PP?
  148. RH 6V6
  149. Unholtz-Dickie amp, 4-1000's
  150. Somewhat Newbie..
  151. grounding RCA inputs
  152. ESS9018 I/V
  153. Catode follower with 6N7S (6n7GT)
  154. Recommended RIAA Values for this Circuit
  155. PC board design for PSE amp
  156. Audio Research SP-11 HV Regulator
  157. heathkit SA2
  158. russian 1578 tube production years
  159. partial list of tubes I have
  160. Bench Power Supply Questions ?
  161. Identify this tube?
  162. your input - bulb / led / neon selection for short tester
  163. Potted choke orientation/amp layout
  164. Tamura F-2012
  165. Joining output windings
  166. B&K 650 tube tester
  167. 5687 LTSpice model needed
  168. Can you identify this transformer? 70V line matching?
  169. I had to post this..the 211 in all its glory!
  170. Help with preamp/driver/output setup
  171. Accident - Shorted Cathode to grid!!
  172. Correct B+ for EL84 UL PP
  173. RH807 output transformer....what did you use?
  174. Headphone tube amp with balanced output?
  175. Tube buffer with 6n1p-EV
  176. First little SE
  177. ID Nice Unknown Tube
  178. Bell and Howell Model-601
  179. what should my mulit reader be on to bias yaqin 100b
  180. Fixing an old Tandberg Huldra 6 Radio
  181. 30W sweep tube amp
  182. Atmosphère S-40 with KT88, does someone know about this amp?
  183. What happens when Output transformer max voltage (slightly) exceeded?
  184. what type is the best?
  185. Kiwame carbon resistors
  186. Rocker Switch Wiring
  187. RH6550
  188. Diodes for Marantz 8B
  189. Diodes for Marantz 8B
  190. Telefunken 2430 Opus Resistor Burnout
  191. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  192. Conrad Johnson MV40 copy and Fisher OP's
  193. Are EF86 Tubes inherently microphonic?
  194. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  195. Need a rectifier tube...
  196. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.
  197. How much spl can a triode take?
  198. Octal CCDA kit - help needed!
  199. Mod input of 6AU6/6AQ5 amp for iPod
  200. Put a tube on your PC just for fun..
  201. ST35 Cathode Feedback
  202. Series Shunt tube regulator
  203. Help ID this tube ^&$**@# lettering!
  204. Adding a db VU meter to an existing tube mic pre
  205. Quad 22 interstage cap?
  206. First test of my AX84 HI-octane
  207. 4P1L triode PP (40W!!?)
  208. KT88 shootout vintage vs new vs 90
  209. Help needed to identify this british made Amp
  210. PSU II Question
  211. Quality tube buffer with ECC83
  212. K12g Amp Question
  213. Stark 9-66 tube tester - repair help
  214. output transfo problem
  215. Pair of Fisher CA-40 Oddballs
  216. Model 601 tube amp.
  217. Model 601 Tube amp
  218. First power amp build. Is this normal??
  219. Compactronized 6146
  220. Preamp and inverter on B7G base tubes circuit.
  221. Advice and Suggestions on Amp designs
  222. Help who tube buffer x10-d
  223. EL803S-6CW5 / EL86 amp design check (schematic attached)
  224. amp buzz in one channel on inrush / power on
  225. SE 8-10W monoblock build help
  226. GlassWare Tube CAD
  227. SMD Parts and the DIYer
  228. 6CW5 / EL86 operating point
  229. RH84 power output
  230. 6n6p-ir
  231. Transformer bubbling
  232. Crackling noise.... pls help on Pre-amp
  233. RH84 amp. Plate is 300V. What voltage...
  234. Amplificator Class A 2 X EL504
  235. Help in testing 12ax7 and 7869 tubes
  236. Micro-Cap Tubes Parameters question
  237. Cathode Bypass Capacitor
  238. NOOB ALERT! sooo omany questions.....
  239. IS THIS A REAL E810F ???
  240. Chassis design question / cooling of small signal valves
  241. 5 leads pp output transformer
  242. Vote and Comment: SRPP vs. Aikido vs. Grounded Grid
  243. NEED ADVICE ON THIS SCHEMATIC AND WILL IT WOFK
  244. Help Identifying a Console Pull Amplifier
  245. sunaudio 2A3 circuit...is it good for newbie?
  246. KT120: When does it starts to sing ?
  247. Simple Time Delay (no more excuses for not having one)
  248. Cary SLP-05
  249. 6SN7 Grounded Grid
  250. input selector switch replacement help

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