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View Full Version : Tubes / Valves


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  1. Counterpoint SA-4 manual and schematics
  2. Ever heard of a Valvo 16ECC ?
  3. the Reversal SRPP
  4. Want to build a C3G linestage
  5. 30A5 tubes
  6. Good speakers to match a K-12
  7. Driving Long Cables, how much current?
  8. twin triode question
  9. Am I going to blow up my 7189s
  10. How is wattage calculated when only using a single section?
  11. Counterpoint SA5 problems and a question.
  12. Headphone Amplifier 6922EH
  13. Fuse Clip for Small Plate Cap Use
  14. Advice sought on medium power triode for tube headphone amplifier
  15. Not the 111M; A Precise 116 Tube Tester
  16. Input stage
  17. Does anyone have any FFT plots from real Class-AB tube amps?
  18. Testing for a Damaged Output Trafo
  19. What has happened to WE Huntsville lately?
  20. Output Transformers Sun HCT 1003 KT
  21. Plexiglass case for small tubes?
  22. 100 Best Sound Tubes
  23. Input tube bias
  24. eschematic amplifier sinle end 12at7 6av6 6bq5
  25. Wiring - Audio Note Transformer Parallel Single-Ended 300B
  26. HV using zener diode
  27. Akai M8 rebuild up and running!
  28. Best current production 2a3
  29. what happens when plugging a stereo source into mono jack on a tube amp?
  30. Transformer coupled Gainclone idea.
  31. Audio Research VT100
  32. output transformer turns per volt
  33. valves and metal cones= bad mating?
  34. Why do you need a grid to ground resistor on a line stage?
  35. Need some help with RIAA Preamp
  36. Swapping transformer cores
  37. got hold of a bunch of tubes...
  38. output transformer secondary configuration
  39. WE/Ultrapath B+ Where?
  40. Blending 12ax7 parallel gain stages
  41. Sudden spark.
  42. Priboj Reborn
  43. Misunderstand of sijosae schematic
  44. 12AX7 Identification
  45. GM70 Datasheet Error!!
  46. Using old Hammond iron
  47. Need confirmation on LED bias for circuit
  48. Tone control problems
  49. Tube Parameter "Attenuation, Harmonic" What is it?
  50. Bias adjust on '65 Twin Reverb Reissue AB763 - 2004?
  51. Need HELP on Randall RGT100ES 6L6 to EL34
  52. Tube amp with Dual Triode
  53. Fisher X-101-C bias question
  54. DC Current-Regulated 300B filaments?
  55. Anyone ever use DC to heat rectifier tubes?
  56. Tantalum Resistor Watt?
  57. Help Choosing Power Supply Voltage Regulator Aikido Phono Amp
  58. Best sounding remote control volume
  59. plate and screen voltage
  60. 12AT7 plate voltage
  61. Latest LTspice giving crazy FFT results
  62. Dynakit PC-3A as a balance pre?
  63. e283cc better sounding than?
  64. Porchlight Scratchbuild
  65. No output and Loud squeals! Help!
  66. Low mu triode for phase splitter
  67. Help figuring which is the center tap???
  68. Help with Paco SA-40
  69. Best tube/sonics
  70. One Half 12AU7
  71. 1939 Novachord - 163 Tube Monster!!
  72. Gyrators to replace PSU chokes?
  73. Output trannies for 6as7
  74. 2 Toroids = 1 Isolation Transformer?
  75. Finding Transformer Building Supplies
  76. Sagging Heaters
  77. Kofi Annan in: "Kofi's Baby Huey"
  78. Point to point wiring help
  79. help !! PTT2s Line stage
  80. Rickard Berglund, Sweden
  81. "The Sussex Homebrew Valve Tester"
  82. clipping
  83. Wanted: a couple of UNF bolts
  84. H-Bridge Amp Design
  85. need help with yaqin mc10l
  86. Watt the?
  87. DIY tube preamp with 5687
  88. Help with tube stereo build
  89. Tube recommendation for speakers
  90. Bogen mx60a Schematic
  91. Eliminating volume pot?
  92. CXPP100-MS-3.3K or CXPP100-MS-4.2K
  93. tube power supply voltage
  94. Driver Bypass Cap - Value?
  95. Tube bases and plate caps rant
  96. tube dual regulated psu needs amp
  97. Help me choose output transformers
  98. 12GT5-guitar amp.
  99. Verdier dual regulated tube psu
  100. Aikido Phono Amp Output Tubes 12AU7 and 12AX7?
  101. Mullard EL84 ID
  102. schematic request for transformer with 4k primary and UL taps
  103. Plate-Grid feedback: How to get better than DHT performance from cheaper tubes
  104. Anyone going to the Dayton Hamfest?
  105. More class D madness
  106. the SuperHybrid
  107. Tecon Model "55" final mods(?)
  108. Hammond P-T125E OPT
  109. Highbred Amp "TUMOS" Sounds good?
  110. 300B SET which chassis design
  111. Help with creating a simple tube HV regulated supply
  112. Tube Sockets for oddball miniatures
  113. McGohan M506 PA Guitar conversion mods.
  114. Bogen chb35a
  115. My last el84 PP tube amplifier
  116. Ultrapath - Advantages?
  117. Phono preamp with c/em2
  118. 12AY7 plate current
  119. OPT identification
  120. Resistor values at supply to anodes
  121. Typical output impedance for tube amps
  122. Problems with EM87 stereo level indicator for computer line out
  123. VR tube recommendation
  124. Mills MRA-5 resistors in tube circuits
  125. B&K Dyna-Quik 500 shows good tubes as Shorted
  126. Output transformers
  127. dbx 386 upgrade
  128. Sub 6n6p for 6n1p?
  129. SET Amp History in Japan
  130. Grid Bias or Cathode Bias
  131. Oscillating CJ PV-5
  132. FireFly Single Ended Tetrode
  133. Aikido front end for a SE 6C33S
  134. Ground Plane vs Star earth
  135. Circuit board with long post??
  136. ecc804 as Phase Splitter
  137. What can you do with a 3a5?
  138. Auto Wave soldering sockets
  139. Using diode for biasing
  140. No bass in 300b amp
  141. Tube socket and pin cleaning
  142. Help With Left Channel Hum
  143. Volume pot has rustling sound
  144. How best to distribute heater windings
  145. 30MB6 data
  146. Kofi Annan in: "Pushed and Pulled Back!"
  147. How dangerous is it to build an SET?
  148. 6as7 SE OTL
  149. Melody Roll
  150. 8417 Output Transformer
  151. Do you still need matched tubes if running a CCS ?
  152. Is a LM335 a direct replacement for a LM317T?
  153. Bias worry
  154. About the tube 6463
  155. awesome RCA MI 12158 tube amp project
  156. Crazy idea: Output tranny with constant magnetic gap?
  157. Most linear triode-strapped pentode
  158. Aikidio Phono Amp Questions
  159. Sample and Hold
  160. Big push-pull power for dummies
  161. Foxtrot Guitar Amp - Output transformer
  162. Taking my KT88 SE E-linear amp to the next level (long)
  163. Aikido Janus Shunt PSU
  164. 12b4a phase splitter! The best?
  165. Sansui 500EA vs. 500A
  166. Cascoded Ring of Two for Plate Load
  167. 6SL7 distortion
  168. My new PL36 Push-Pull amp
  169. adding line out to guitar tube preamp
  170. Thyratrons
  171. Tube ampl. for repair
  172. Date codes
  173. China Sountrack KT88 need shematic
  174. Anyone know anything about the Luxman A-2003 tube xover?
  175. Dynamic negative feedback?
  176. Need help with Ampeg J-20 crackling buzzing hissing noise issue/blocking distortion?
  177. New bie: some questions, want to start DIY pre amp
  178. Power Transformer issue
  179. Guess That Tube
  180. Poor soundstage with SET 300B
  181. Dedicated ESL amp -- please comment
  182. Buzzing AC relay coil
  183. Stereo amp parallel wired to mono - possible?
  184. Need biasing advice, cathode biased amp.
  185. Before I go ahead and build this...
  186. Beginner Tube Stereo
  187. 6AU6 and 6J5 for Guitar amp or pedal?
  188. Morgan Jones and the ECC88/6922/6DJ8
  189. Help with matching speaker impedance to old tube amp
  190. srpp 2a3 power supply
  191. 12AX7 Tube Question
  192. New problem with Music Angel KT88
  193. Need help changing 12V heater to 6V
  194. Phono cathode follower challenge!!
  195. 6au6 for stereo?
  196. determining input/output impedance
  197. "Singing" output transformers
  198. Sustitute 5842 for EC86
  199. Vege-toobz ;)
  200. precision electronics inc. tube guitar amplifier
  201. Bad channel in RCA Victor Console
  202. Did tone bypass on PAS what about caps
  203. Pe06/40n
  204. Anyone own an HH Scott LK-72 Integrated amp?
  205. HELP!! Howling K12G!!
  206. McIntosh MC60 Bias question
  207. Connecting a MF tube buffer directly to AKM DAC
  208. How to evaluate RF tubes for power and fidelity?
  209. Amity Amp Nutshell Audio
  210. 8086 Tubes?
  211. Lil' Devil P-P Amp
  212. 6SN7 vs. 6SL7 in Darling amp
  213. BBC AM8/6 mono tube amp schematic
  214. ST70 works with PAS but not another preamp
  215. Freds in 6X5 psu?
  216. Hi-End 50W Push-Amplifier inspired to AudioResearch
  217. Audioromy fu-29 - push pull!
  218. Help - MS-6V6 Yaqin schematic
  219. High Voltage Direct Drive amplifier for Plasma loudspeaker
  220. A Direct-Coupled Amplifier with Cathode Follower 6V6
  221. Separo- Full Pictorial Disclosure- opinions please
  222. Hammond Integrated Amp Kits 1950s
  223. LW6-180 schematic
  224. What to look for in a tube preamp?
  225. Russian-English Translation of 4P1L datasheet
  226. Can anybody identify this
  227. New York Audio Labs (NYAL) OTL1
  228. 5F6A via Mechanical Design
  229. New to tubes, need your advice.
  230. Brook 12a clone
  231. What type of audio transformers to use for tubes / valves
  232. need advice about building tube xover as a piece of art
  233. My first amp project, 6BQ5 (EL84) Single-End
  234. MA 6P1 6AQ5 Push-Pull Valve Tube Integrated Amplifier
  235. Stupid AB bias question
  236. Jamoke Direct to LPT/CCS PP EL34
  237. 4 x EL84 (6BQ5) in Push-Pull - Power Supply
  238. RFC: 300B driven by anode follower (6J5/6SN7)
  239. AVO VCM163 oddity
  240. Shuguang SG-50 ( RCA UX-250 replica) comments ???
  241. Schematic question (Trainwreck)
  242. Novel mode of lithium battery bias
  243. power supply problem in my dream amp...
  244. Understanding how to wire up an Output Transformer
  245. Tube sound without the tube! (almost)
  246. Replace Bypass Cap?
  247. Sales On Sound Vintage 40s Tube Amp Info
  248. Why am I blowing fuses when connecting to next component?
  249. New owner to an old Heathkit AA-121
  250. New amp just finished 6080 pp opt

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