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  1. 6L6GC-EH re-visit
  2. 6n6p advice
  3. Help with a valve amp setup (1/4 inch jack out)
  4. 6CB5 Plate Load
  5. A good cheap power amp for a Dyna PAS 3X ?
  6. Automatic DHT current source
  7. What Does 1/2 mean in a 1/2 6N1P Tube?
  8. Preamp Servo Filter
  9. Lowest V at which damper diode tubes work
  10. My 1st tube amp build thread (and lots of questions)
  11. Filament power switch.
  12. HV Shunt Regulator - Advice needed
  13. how much space for cooling a tube amp?
  14. 7716 Tube Data
  15. Current sense cathode resistor blow up
  16. Resistor ratings for a small tube circuit?
  17. power tube for 6SN7 for 10 6SN7 in parallel psu
  18. Recommend an ECL82 SE Schematic?
  19. Rose RV-23 preamp valves. 4xECC82, or 2xECC82 + 2xECC83?
  20. Hybrid-GZ34-FWB: What changes in specs ?
  21. rogue audio bias selector knob help
  22. Help a Solid State idiot
  23. Problem With 01A Preamp (Losing Rectifiers)
  24. Do your very worst
  25. Small hum in Transcendent Sound phono clone
  26. Shuguang Treasure CV181-Z Review
  27. Question about type 52 tube
  28. Angela 91 300B Monoblocks with 6C6 Pentode-
  29. Audioromy M828A > peep
  30. Need suggestions for CCS and parallel feed OT implementation
  31. Transcendent Sound Ground Grid
  32. Issue with 211 amplifier
  33. Questions about tetrodes for specialists
  34. Fisher X100-C amp restoration help please
  35. Noise from Ceramic Coupling Capacitors?
  36. PX4 SET amp Project
  37. valve
  38. What about adding a slight "presence" boost RC network fixed in the amplifier.
  39. Needing OT for SE ECL82/6BM8 amplfier
  40. 6X4 negative cathode voltage schem needed
  41. 300B 5V DC filament supply from 5V AC windings
  42. KR Audio Marconi R Valve linestage help
  43. How to calculate current rating of choke?
  44. Hum when ground connected
  45. Western Electric 142A Capacitors - Need advice
  46. Need help for ECL86 SE amp feedback
  47. Newbie wanting to replace a power transformer
  48. Tube Design Idea (Lifespan Extension)
  49. Almost All DHT System Advice
  50. Suggestions needed on buying 7868 tubes
  51. Question
  52. Treble circuit in Tone Control
  53. Quadrature/Coincidence FM Demodulation
  54. Headphones on Trancendent Grounded Grid preamp.
  55. 6sn7/300b
  56. Right channel too quiet in stereo console
  57. White cathode follower analysis and design
  58. SP14
  59. 6BQ5 triode driver stage operating point
  60. Did I draw this parafeed correctly???
  61. AutoBIAS (tentlabs) module
  62. PP 300b project (3 stage)
  63. Ideal THD vs Frequency for SET
  64. DigiBIAS incl. delay
  65. 6U8 input stage question
  66. PP amp E88CC - 6N8S - 6GB8
  67. Strange 45 behavior, Gas?
  68. PP UL amp: ECC83 + 6SN7 + KT88
  69. Simple trick to change UL from 40% to 60% ?!
  70. JJ 12AY7 for EL34 SE ?
  71. IT stage microphony
  72. first amplifier question
  73. 5687 tube 6.3VDC heater pins connection
  74. Preamp Power Supply - HV, filament & chassis earth - question
  75. Hybrid with a difference?
  76. Need Schematic for 6C5 Linestage
  77. KT88 PS Caps?
  78. Jolida 102B ALPS RK27 Install Tricks
  79. Yet another CCS
  80. Heater cathode potential
  81. Preamp HV and coupling cap question
  82. I am looking for the circuit from a tube amp (description and photo attached)
  83. Tube surround sound/hafler home theater build
  84. Looking at more preamps........
  85. Help me to improve my 6n6p/El34 UL...CCS/AnodeChoke/Transformer ?
  86. Darkvoice 336 tubes
  87. GU-50 opt in europe
  88. OPT on Ebay, any one know or use this?
  89. VTA M-125 mono block kit.
  90. 6V6 Regulator Issue
  91. Tube phono stage build
  92. First valve amplifier, tunings!
  93. Looking for 7N7 preamp schematic
  94. Line Magnetic LM-216 -- Annoying Hum
  95. Anthem Pre2L Special Edition...tubes?
  96. 6550 tube compatibles?
  97. Dynaco VTA ST-120.
  98. Tube amp help
  99. Transmitting tubes eg; 805 datasheet, Rp, gm, mu?
  100. 300b selectable ac or dc filament supply?
  101. Russian 6J43P-E(6Ж43ПE) Dual anode pentode....
  102. suitable 1:2 opt for a headphone amp
  103. Primary impedance, which tube?
  104. Dual-control, sharp-cutoff pentode
  105. Big transformer for little project?
  106. Entry in to DIY Tube world with 300B SET Kit
  107. Dynaco ST-70, Original or Mod?
  108. Damper diode as delay
  109. Thoughts on this design......
  110. Output Transformer Question
  111. Feedback on Andrea Ciuffoli's Extreme Hi-End Hybrid Amplifier
  112. 4P1L lifetime
  113. Help troubleshooting oscillation
  114. Audio Research VS110
  115. Re-activate getter/save gassy tube
  116. What does 40% screen tap mean for UL OPT?
  117. Which pentode mode is this?
  118. ST-70 Power supply questions
  119. 3 stage DC - any thoughts?
  120. Help to choose the right EL34 schematic
  121. Russian tubes - Classification of various brands?
  122. hot bias- actually hot?
  123. POT between EAR834 phono and power amp
  124. Matching 100 tubes ECC803S
  125. EL34 Single-ended Class A tube amplifier KIT
  126. Help to de-bug a 6AH9/mosfet concertina driver
  127. How is this possible??
  128. 10k power tube load
  129. Phonola Record Player TK 2146
  130. Anode Bootstrapping
  131. basic line stage testing
  132. Question about power transformer choice.
  133. Separating power supply with SET amps
  134. Weird EL84 and 6p14p-k tubes
  135. genuine 6P14P-EB?
  136. Power Transformer for OTL Headphone Amp
  137. Magnetic relay to drive with small-signal tube
  138. rj6 coaxial cable to wire the input connections to the input/driver tubes?
  139. Noob question: one channel is dead; safe to swap tubes to troubleshoot?
  140. Little 6BQ5 am squealing....HELP
  141. output trans for input trans
  142. Emulating Ultra Linear Mode
  143. Mullard 5-20 and logarithmic passive volume control: how to connect ?
  144. Chinese EL34B SE "A10" Disection
  145. indicator light using filament 6.3VAC voltage
  146. 6p42s tubes
  147. Type 79 Tube Question
  148. Preamp for 6N3 tube
  149. How to calculate output impedance drop via NFB
  150. In praise of Tribute Autoformer Volume Control
  151. 12AE7 Automotive Tube Amplifier
  152. Using a LM317 for setting tube bias
  153. KT120 LED bias?
  154. Where to buy 4P1L socket
  155. Tubes with different mu in a cathode follower
  156. Scott LK-48 stock?
  157. Troubleshooting question
  158. Constant current load for testing power supplies
  159. Push Pull Parafeed Headphones Amp
  160. DHT biasing question
  161. Grommes 20PG8 Amp Motorboating
  162. Anyother tube with same pinout than 6CG7?
  163. Calculating coupling capacitor values
  164. Help with Welborne DRD 45 amp
  165. GU-50 + solid state driver
  166. ECC82. JJ vs vintage, peculiar frequency response tests
  167. How to Bias Morrison Micro 2A3?
  168. Solid state feeding a tube amplifier
  169. Power Transformer for 845 Monoblock?
  170. 16LS Kit
  171. 12 pin compactron pinout dimensions ?
  172. Mullard 3-3 build oscillation?
  173. LTSpice newbie: why doesn't the EL34 sim properly?
  174. Op Amp booster circuits, tube hybrid
  175. 150K resistor at input. Too high value?
  176. Looking for a book about valve amps (MJ not suitable)
  177. Power Transformer for Decware ZBox
  178. mu-follower for hybrid amp
  179. Quick Question on Grid NFB
  180. Vintage SE output transformer has a G2 tap
  181. Views on a regulated bias supply
  182. Distortion in cathode follower output stage
  183. VT4-B
  184. series heater voltage for 5-channel preamp
  185. Tube Technology Unisis Information
  186. Newbie with k-16ls
  187. can i run parallel se 300b's off one supply winding
  188. volume fluctuation on tube amp
  189. The chassis, to ground or not to ground.....
  190. Substitute for RCA 841 driving 300B
  191. Music Angel
  192. Priboj with other tubes
  193. 211 Melody Platinum amplifier.
  194. Cloning my 1968 stereo.....power transformer question.
  195. DC Coupled EL34 Biasing - Help Request
  196. K-12G Tube amp Hum at low volume
  197. SE 6c33 Amplifier OPT overshoot/ringing oscillations
  198. Dynaco MKIII issue
  199. "SRPP" 300B Headphone Amplifier
  200. LDR's in the Marantz 10b
  201. Shuguang Treasure CV181-Z Lifespan in hours?
  202. Need to help to understand using 6x5 as half wave rect
  203. 300B plate voltages
  204. Mullard 3-3 power supply
  205. Best path into diy hifi tube audio
  206. 801A PP or 2a3 PP
  207. Shuguang Treasure tube genuine source?
  208. Passive RIAA with 6F12P and 6N5P
  209. ANDREA a Democratic hybrid amp for luxury sound
  210. Quad II classic output transformer
  211. overheating 10w resistor in power supply
  212. Strange EL34BW
  213. Scott LC21 tube hums when hand is near
  214. Heater Elevation & Dual Rail Power Supply
  215. Request for help with Wavebourn's SVCS
  216. Lundahl LL1682PP suitable for 300B PP amp?
  217. Modding input of EAR859 to feed output for Bi-Amp?
  218. Voltage gain triode
  219. Excellent midbass performance
  220. 6SN7 Mu Follower problem in distortion
  221. 6N7's in phase inverter service
  222. Going to Amberg Germany and Graz Austria, Any DIY-ers in the area have time to meet?
  223. Mullard 3-3, wrong power transformer
  224. Tube hybrid vfet
  225. 12ax7 + 12au7 strange behavior
  226. Hybrid amplifier with 6SN7 or 6SL7 tube
  227. Dynaco ST70 midrange glare
  228. Request review of my schematic
  229. 12AX7/12AU7 Williamson-style front end
  230. No-Vacuum Diamond Triode Device
  231. 6CB6 pentodes and 12AU7 twin triode to replace 7199 in major SCA35 rebuild
  232. miniwatt as headphone amp, impedance Q
  233. Fluorescing GU 29 tubes - whats wrong?
  234. SE 6CA7 Stereo Tube Amplifier Pot Hum
  235. Paragon 12A
  236. Need Help with PSU for KT120 / KT150 SE
  237. SE valve tube output transformer clarification.
  238. Poor valves or expecting too much ?
  239. ST-70 vs. Mark IV heater connections
  240. 6H8C Glass Moves
  241. Audio Research LS2BMkII parts identification
  242. Newbie Recapping, Help identifying caps
  243. Suppressor Grid tied to plate and not ground
  244. Picked up a heathkit aa - 32. ....now what.
  245. EL34 Internal shorts
  246. Questions about this EL34 amp design
  247. Troubleshooting 6550 Jadis Clone
  248. Help the newb: cathode to heater shortage
  249. Diy tube amp recommandation
  250. Bogen Presto Challenger AC220 Stereo Amplifier

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