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View Full Version : Tubes / Valves


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  1. Oh! Darling
  2. Testing 3B22 on Hickok 752a
  3. Has anyone ever used the 6C41C in PP?
  4. RH 6V6
  5. Unholtz-Dickie amp, 4-1000's
  6. Somewhat Newbie..
  7. grounding RCA inputs
  8. ESS9018 I/V
  9. Catode follower with 6N7S (6n7GT)
  10. Recommended RIAA Values for this Circuit
  11. PC board design for PSE amp
  12. Audio Research SP-11 HV Regulator
  13. heathkit SA2
  14. russian 1578 tube production years
  15. partial list of tubes I have
  16. Bench Power Supply Questions ?
  17. Identify this tube?
  18. your input - bulb / led / neon selection for short tester
  19. Potted choke orientation/amp layout
  20. Tamura F-2012
  21. Joining output windings
  22. B&K 650 tube tester
  23. 5687 LTSpice model needed
  24. Can you identify this transformer? 70V line matching?
  25. I had to post this..the 211 in all its glory!
  26. Help with preamp/driver/output setup
  27. Accident - Shorted Cathode to grid!!
  28. Correct B+ for EL84 UL PP
  29. RH807 output transformer....what did you use?
  30. Headphone tube amp with balanced output?
  31. Tube buffer with 6n1p-EV
  32. First little SE
  33. ID Nice Unknown Tube
  34. Bell and Howell Model-601
  35. what should my mulit reader be on to bias yaqin 100b
  36. Fixing an old Tandberg Huldra 6 Radio
  37. 30W sweep tube amp
  38. Atmosphère S-40 with KT88, does someone know about this amp?
  39. What happens when Output transformer max voltage (slightly) exceeded?
  40. what type is the best?
  41. Kiwame carbon resistors
  42. Rocker Switch Wiring
  43. RH6550
  44. Diodes for Marantz 8B
  45. Diodes for Marantz 8B
  46. Telefunken 2430 Opus Resistor Burnout
  47. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  48. Conrad Johnson MV40 copy and Fisher OP's
  49. Are EF86 Tubes inherently microphonic?
  50. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  51. Need a rectifier tube...
  52. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.
  53. How much spl can a triode take?
  54. Octal CCDA kit - help needed!
  55. Mod input of 6AU6/6AQ5 amp for iPod
  56. Put a tube on your PC just for fun..
  57. ST35 Cathode Feedback
  58. Series Shunt tube regulator
  59. Help ID this tube ^&$**@# lettering!
  60. Adding a db VU meter to an existing tube mic pre
  61. Quad 22 interstage cap?
  62. First test of my AX84 HI-octane
  63. 4P1L triode PP (40W!!?)
  64. KT88 shootout vintage vs new vs 90
  65. Help needed to identify this british made Amp
  66. PSU II Question
  67. Quality tube buffer with ECC83
  68. K12g Amp Question
  69. Stark 9-66 tube tester - repair help
  70. output transfo problem
  71. Pair of Fisher CA-40 Oddballs
  72. Model 601 tube amp.
  73. Model 601 Tube amp
  74. First power amp build. Is this normal??
  75. Compactronized 6146
  76. Preamp and inverter on B7G base tubes circuit.
  77. Advice and Suggestions on Amp designs
  78. Help who tube buffer x10-d
  79. EL803S-6CW5 / EL86 amp design check (schematic attached)
  80. amp buzz in one channel on inrush / power on
  81. SE 8-10W monoblock build help
  82. GlassWare Tube CAD
  83. SMD Parts and the DIYer
  84. 6CW5 / EL86 operating point
  85. RH84 power output
  86. 6n6p-ir
  87. Transformer bubbling
  88. Crackling noise.... pls help on Pre-amp
  89. RH84 amp. Plate is 300V. What voltage...
  90. Amplificator Class A 2 X EL504
  91. Help in testing 12ax7 and 7869 tubes
  92. Micro-Cap Tubes Parameters question
  93. Cathode Bypass Capacitor
  94. NOOB ALERT! sooo omany questions.....
  95. IS THIS A REAL E810F ???
  96. Chassis design question / cooling of small signal valves
  97. 5 leads pp output transformer
  98. Vote and Comment: SRPP vs. Aikido vs. Grounded Grid
  99. NEED ADVICE ON THIS SCHEMATIC AND WILL IT WOFK
  100. Help Identifying a Console Pull Amplifier
  101. sunaudio 2A3 circuit...is it good for newbie?
  102. KT120: When does it starts to sing ?
  103. Simple Time Delay (no more excuses for not having one)
  104. Cary SLP-05
  105. 6SN7 Grounded Grid
  106. input selector switch replacement help
  107. help needed with transformer wiring
  108. Tube Schematic Drawig Packages
  109. 12AU7 - 5V4G easy amplifier
  110. Glassware CCA 9-pin PDF
  111. Replacement for the tube 6922 (ECC88)?
  112. Which probes for my first scope?
  113. PP CATHODE BIAS WITH "CCS"
  114. current output tube amplifier
  115. Tube amp for a small room (newbie-like)
  116. What is this old thing from1929?
  117. Arduino cathode current HT etc
  118. Bizzare Output Transformer Connectivity...
  119. OPT to KT88?
  120. Help needed on identifing tube
  121. Amplifier circuit from tube radio
  122. Amplifier circuit from tube radio
  123. Using Valves Library in EAGLE CAD
  124. Biggest noval power pentode?
  125. Akita 12V preamp thoughts
  126. Help, what is this (Marconi 6204) ?
  127. Anyone try DHT 33 or 1Q5 Pentodes wired as Triode?
  128. Would this be a good buy?
  129. Looking for a complete DIY Tube amp
  130. Schematic by TS LIM Pre-amp
  131. Fisher Model 100 'AZ' Mono Amp Rebuild w/ Oscillations
  132. Measuring inductance
  133. Leak stereo 20
  134. Gain and gm of a QQE03/20 anyone ??
  135. Power supply options for tube amplifiers.
  136. CCS question mA
  137. Help wanted with testing and finetuning.
  138. YAQIN VK2100 pre amp
  139. Identify record player and valve
  140. AC Line Filter
  141. blue flash inside 5Y3GT
  142. Heater-Cathode Leakage
  143. Old Tube Kit
  144. Point to Point SET KT88/6550 Build
  145. D3a - MOSFET HYBRID CIRCLOTRON
  146. Aikido CCDA
  147. output impedance
  148. Bizzaro fix for hum problem needs explanation! Pretty Please
  149. Bizzaro fix for hum problem needs explanation! Pretty Please
  150. Questions regarding first build - K-502
  151. Good tube tech in Brooklyn NYC?
  152. Looking for LTspice tube models
  153. Audio Research SP15 : faulty phono stage
  154. Spark 810 looking for the diagram
  155. HP 8903B Question ?
  156. 1955 Hammond Organ Tube Amp
  157. Suggestions Please
  158. Croft Series 4 PL519 regulator
  159. Rectifier ID
  160. Adding headphone output to Darling amp
  161. CLC vs CLCLC Filter Power Supply
  162. Where to get Vacuum Tube Valley magazine?
  163. Magnavox 8802 HELP!!!
  164. Vaa for KT120
  165. Tubes in a Home Theater?
  166. Yaqin mc 10l tube risers?
  167. Wiring an LED strip into an amp?
  168. Need a bit more power :)
  169. yaqin 100b kt88-98 bulb blown and smoking coming from the amp
  170. Amp. 2x5W RV12 P2000driver RL12 P10 final
  171. Layout challange: Dual Maggie AMP148 based.
  172. Replacement PT question
  173. Real Telefunken E88CC?
  174. Any audio differences for EL-84 P-P OPT?
  175. Need help identifying this amplifier.
  176. Can anyone identify this valve / tube?
  177. Pentode-like Triodes
  178. Telefunken EL156 SE experience
  179. Help with a Tubelab SE Power Supply Transformer
  180. 33:1 opt for 5:1 use?
  181. Siemens B30C600 selenium bridge rectifier
  182. ECC81 mu-follower problem
  183. Audio Note M7 line stage preaamp!
  184. Should I upgrade considering.....
  185. Using Wards SE EL84 Transformers for Decware Zenkit1
  186. Parts Box 300b
  187. TO-9105-1 Triodeelectronics output transformer
  188. Need help pairing Martin Logan Sequel II speakers with 4 Watt tube monoblocks
  189. What is your comment about akido linestage?
  190. Driving an EL34 amp without driver stage ?
  191. Mystery Telefunken T9 amp
  192. Improving preamp's bass response.
  193. EZ150
  194. Need help identifying baldwin tube amp
  195. 45 amp with 6N7
  196. Selecting 5881's question
  197. Schematic with ECC88
  198. PP Output Transformers
  199. Gas Tube Question (CK1006 Rectifier)
  200. Art Audio Quintet MK1 EL34 PP resistor value
  201. The Midlife Crisis - My 833C Amp Build
  202. Tube amp Building Compitition Interest check
  203. Found myself a Magnavox 9302-00
  204. DIY Stereo Amp 15-50wpc
  205. Gray Research AM-50
  206. Preamp Grounding and Hum
  207. What to do with AA-100 output iron
  208. Flat screen t.v. and tube amps?
  209. 12AX7 Plate Current vs. HT Voltage
  210. Hammond A0-29 project organ amp
  211. Need help with Phono preamp build with microcontroller relay switching
  212. CCS fixed bias
  213. Gerber file help!!!!!!!
  214. Finally real inductance of a grid resistor...
  215. 12B4 vs. 12B4A
  216. Simple hybrid amplifier
  217. VTL Stereo 50
  218. Distributed volume pot
  219. DHT fixed bias schematic
  220. Wiring a power transformer
  221. What can I do with these tubes?
  222. RCA SP-20 circuit question.
  223. Magnavox Model 1ST525A
  224. LD91 signature power transformer wires Help?
  225. Effect of Regulated DC Filament Supply
  226. D3a-300b amp help!
  227. Need Schematic for this GE Console fast.
  228. Sound experiences 6SN7
  229. EL152 maximum operating settings?
  230. OMG just scored a huge lot of Nos/Nib tube lot for $20
  231. Help with DN2540 CCS design
  232. Strange problem with Caps not blocking DC
  233. Help and suggestions for My Phono and pre amp
  234. PCB and transformer placing and shielding
  235. MC-40 bias current?
  236. Gyrator on ccs-tailed LTP?
  237. capacitor polarity on a VM 20050 amp
  238. Choke? Where to begin?
  239. H11F1 Switching in tube circuits
  240. cooling traditional E-core iron transformers
  241. New vacuum-tube preamp-project!
  242. DIY tube tester
  243. NABU TuneLabSE Buildup
  244. I just inherited a TON of tubes and tube amp components.
  245. Filament Transformer Question ?
  246. Low gain in Heathkit SA-2 phonostage
  247. speakers for leak tl12+
  248. LM3875 + Broskie Cathode Follower. (PICS)
  249. Has anyone built Andrea Ciuffolis Phono End ?
  250. tube substitute

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