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View Full Version : Tubes / Valves


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  1. Tube Schematic Drawig Packages
  2. 12AU7 - 5V4G easy amplifier
  3. Glassware CCA 9-pin PDF
  4. Replacement for the tube 6922 (ECC88)?
  5. Which probes for my first scope?
  6. PP CATHODE BIAS WITH "CCS"
  7. current output tube amplifier
  8. Tube amp for a small room (newbie-like)
  9. What is this old thing from1929?
  10. Arduino cathode current HT etc
  11. Bizzare Output Transformer Connectivity...
  12. OPT to KT88?
  13. Help needed on identifing tube
  14. Amplifier circuit from tube radio
  15. Amplifier circuit from tube radio
  16. Using Valves Library in EAGLE CAD
  17. Biggest noval power pentode?
  18. Akita 12V preamp thoughts
  19. Help, what is this (Marconi 6204) ?
  20. Anyone try DHT 33 or 1Q5 Pentodes wired as Triode?
  21. Would this be a good buy?
  22. Looking for a complete DIY Tube amp
  23. Schematic by TS LIM Pre-amp
  24. Fisher Model 100 'AZ' Mono Amp Rebuild w/ Oscillations
  25. Measuring inductance
  26. Leak stereo 20
  27. Gain and gm of a QQE03/20 anyone ??
  28. Power supply options for tube amplifiers.
  29. CCS question mA
  30. Help wanted with testing and finetuning.
  31. YAQIN VK2100 pre amp
  32. Identify record player and valve
  33. AC Line Filter
  34. blue flash inside 5Y3GT
  35. Heater-Cathode Leakage
  36. Old Tube Kit
  37. Point to Point SET KT88/6550 Build
  38. D3a - MOSFET HYBRID CIRCLOTRON
  39. Aikido CCDA
  40. output impedance
  41. Bizzaro fix for hum problem needs explanation! Pretty Please
  42. Bizzaro fix for hum problem needs explanation! Pretty Please
  43. Questions regarding first build - K-502
  44. Good tube tech in Brooklyn NYC?
  45. Looking for LTspice tube models
  46. Audio Research SP15 : faulty phono stage
  47. Spark 810 looking for the diagram
  48. HP 8903B Question ?
  49. 1955 Hammond Organ Tube Amp
  50. Suggestions Please
  51. Croft Series 4 PL519 regulator
  52. Rectifier ID
  53. Adding headphone output to Darling amp
  54. CLC vs CLCLC Filter Power Supply
  55. Where to get Vacuum Tube Valley magazine?
  56. Magnavox 8802 HELP!!!
  57. Vaa for KT120
  58. Tubes in a Home Theater?
  59. Yaqin mc 10l tube risers?
  60. Wiring an LED strip into an amp?
  61. Need a bit more power :)
  62. yaqin 100b kt88-98 bulb blown and smoking coming from the amp
  63. Amp. 2x5W RV12 P2000driver RL12 P10 final
  64. Layout challange: Dual Maggie AMP148 based.
  65. Replacement PT question
  66. Real Telefunken E88CC?
  67. Any audio differences for EL-84 P-P OPT?
  68. Need help identifying this amplifier.
  69. Can anyone identify this valve / tube?
  70. Pentode-like Triodes
  71. Telefunken EL156 SE experience
  72. Help with a Tubelab SE Power Supply Transformer
  73. 33:1 opt for 5:1 use?
  74. Siemens B30C600 selenium bridge rectifier
  75. ECC81 mu-follower problem
  76. Audio Note M7 line stage preaamp!
  77. Should I upgrade considering.....
  78. Using Wards SE EL84 Transformers for Decware Zenkit1
  79. Parts Box 300b
  80. TO-9105-1 Triodeelectronics output transformer
  81. Need help pairing Martin Logan Sequel II speakers with 4 Watt tube monoblocks
  82. What is your comment about akido linestage?
  83. Driving an EL34 amp without driver stage ?
  84. Mystery Telefunken T9 amp
  85. Improving preamp's bass response.
  86. EZ150
  87. Need help identifying baldwin tube amp
  88. 45 amp with 6N7
  89. Selecting 5881's question
  90. Schematic with ECC88
  91. PP Output Transformers
  92. Gas Tube Question (CK1006 Rectifier)
  93. Art Audio Quintet MK1 EL34 PP resistor value
  94. The Midlife Crisis - My 833C Amp Build
  95. Tube amp Building Compitition Interest check
  96. Found myself a Magnavox 9302-00
  97. DIY Stereo Amp 15-50wpc
  98. Gray Research AM-50
  99. Preamp Grounding and Hum
  100. What to do with AA-100 output iron
  101. Flat screen t.v. and tube amps?
  102. 12AX7 Plate Current vs. HT Voltage
  103. Hammond A0-29 project organ amp
  104. Need help with Phono preamp build with microcontroller relay switching
  105. CCS fixed bias
  106. Gerber file help!!!!!!!
  107. Finally real inductance of a grid resistor...
  108. 12B4 vs. 12B4A
  109. Simple hybrid amplifier
  110. VTL Stereo 50
  111. Distributed volume pot
  112. DHT fixed bias schematic
  113. Wiring a power transformer
  114. What can I do with these tubes?
  115. RCA SP-20 circuit question.
  116. Magnavox Model 1ST525A
  117. LD91 signature power transformer wires Help?
  118. Effect of Regulated DC Filament Supply
  119. D3a-300b amp help!
  120. Need Schematic for this GE Console fast.
  121. Sound experiences 6SN7
  122. EL152 maximum operating settings?
  123. OMG just scored a huge lot of Nos/Nib tube lot for $20
  124. Help with DN2540 CCS design
  125. Strange problem with Caps not blocking DC
  126. Help and suggestions for My Phono and pre amp
  127. PCB and transformer placing and shielding
  128. MC-40 bias current?
  129. Gyrator on ccs-tailed LTP?
  130. capacitor polarity on a VM 20050 amp
  131. Choke? Where to begin?
  132. H11F1 Switching in tube circuits
  133. cooling traditional E-core iron transformers
  134. New vacuum-tube preamp-project!
  135. DIY tube tester
  136. NABU TuneLabSE Buildup
  137. I just inherited a TON of tubes and tube amp components.
  138. Filament Transformer Question ?
  139. Low gain in Heathkit SA-2 phonostage
  140. speakers for leak tl12+
  141. LM3875 + Broskie Cathode Follower. (PICS)
  142. Has anyone built Andrea Ciuffolis Phono End ?
  143. tube substitute
  144. Motorcapacitors in high volt. power supplies?
  145. Troughline, Stereo 20, Technics 1200.Unhappy!
  146. Troughline, Stereo 20, Technics 1200.Unhappy!
  147. Volume potentiometer: the best way to do it...
  148. KT120 "triode" and Hammond 1650N
  149. Tubecad SE Amp Cad
  150. 5702wb
  151. Does anyone know of a company that makes circular risers for tubes?
  152. Negative feedback to differential pair driver
  153. effects send and/or preamp out jack on guitar amps
  154. 6L6 UL Power
  155. Bench Power Supply: What to look for ? Which one to get ?
  156. Bevois Valley EL84 PP - distortion in one channel
  157. good by til next winter
  158. PSUD Questions
  159. Power Transformer Wiring Question ?
  160. Fisher 500C C82/C84 ceramic capacitor function
  161. Tubes to first taker
  162. Neutral wired to chassis, how to add a 3-prong cord?
  163. Heater Transformer - too much voltage
  164. Capacitor value
  165. WD KT88
  166. Ultimate spud amp - any ideas ?
  167. Please Critique My Grounding Scheme
  168. negative voltage drop across a diode
  169. 1.5K 200W output transformers? What tubes?
  170. 50 Type Tube
  171. "12SR7 Starving Student" plays extremly quiet
  172. questions about some sim software
  173. Drive
  174. 4xKT88 into Hammond 1650T, what am I missing?
  175. double mono SE
  176. Two electrolytic cap selection questions
  177. Could This Be the Future of Vacuum Tubes?
  178. Thermography on 6C33C/6C18C aka. 6S33S/6S18S
  179. Rydel's triode model coefficients
  180. 2E26 Options
  181. Loud Popping Dynaco ST-70
  182. Are these EL34's good?
  183. Amp schematic for Sovtek/Svetlana tubes
  184. KT66 power tube amplifier
  185. 6П3С Plate Voltage
  186. Help choosing which Amplifier to build
  187. need help choosing between two amp schems
  188. 100 W-class Circlotron
  189. How can i match power tubes for Transconductance ?
  190. ef89 ef86
  191. ecc82 5687 preamp! audionote
  192. Hammond transformer questions
  193. IXYS CP20M45 IXC - anyone come across them ?
  194. Good Source for Nice Analog Panel Ammeters for 833C Build?
  195. Restore or build from new?
  196. Bob Danielak 826 Amp?
  197. Newbie Tube Power Supply
  198. What shall I build/do with this lot of tubes?
  199. Gingertubes ecl86 amp build
  200. DC restorer
  201. ECF801 Triode/Pentode any useful application ?
  202. Baking Tubes Procedure - Help...
  203. AVO VCM-163 Tube tester problem
  204. ECC82 normal vs ECC82 long plate
  205. 45 Type Push/Pull Amps
  206. leak tl12+
  207. Triode for 60V
  208. Tube Sound Processor
  209. McIntosh MC-275 buy or build an auto-bias tube amp?
  210. slp-90 clone, decent preamp!
  211. Triode St70 with hum
  212. SSR switching HT transformer?
  213. Tube Flash Drive
  214. 6S31B-P Grid current
  215. Tube Op Amp Building Blocks
  216. knight kb-85 restoration/mod
  217. Acceptable Power Supply Noise Limits?
  218. Loadlines and Microsoft Paint
  219. aikido noval all in one caps upgrade
  220. Specific grid stopper question
  221. GU50 Screen Driven, DC Coupled
  222. April fool?
  223. Providing both balanced and unbalanced inputs
  224. Best triode section inside ecc81 tube?
  225. opt for 45 tube
  226. Designing an Interstage Transformer
  227. Tube Amplifier Builder's Competition
  228. testing tubes for shorts
  229. Tube kits
  230. GU29 PP Amplifier
  231. 1625 tube radio?
  232. Measuring volts on an unloaded PSU secondary
  233. Suggest a preamp project for me.
  234. Audio Magazine
  235. Jadis DA88S schematic
  236. clone jadis jp200 preamp
  237. GROMMES LJ5
  238. Altec 1570B Feedback
  239. rebuilding 3tube zenith amp
  240. Effect of lower G2, EL84 PP
  241. Phono connection for pioneer sx34b
  242. Low output from two 6L6's for no apparent reason?
  243. Preamp design ok?
  244. GZ34 base?
  245. Tube Technology Genesis 100w monoblock manual?
  246. 6SN7 & 6V6 Push Pull - increase gain
  247. screen grid resistor value
  248. KT88 design questions
  249. el84/12ax7 se schematic needed!
  250. Broken AMC CVT 2100

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