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View Full Version : Tubes / Valves


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

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