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  1. Power tube at work picture
  2. Tube SE power amp , which one??
  3. Noise in one channel? Pioneer SX-400
  4. Hartung / Prestla OTL amps
  5. Lafayette Model 417
  6. Extreme plate load
  7. What do you think about this idea
  8. el84pse schem, need advice
  9. Video pentodes as outputs
  10. Chinese "Audio Research" KT88s
  11. New 6C33 Socket
  12. 2a3 PP output transformer
  13. Best SET design?
  14. Anybody ever tried EBC41 as 12AX7 substitute?
  15. The 7242
  16. 12bh7a
  17. Phase Splitter Help
  18. Oscilloscope Question
  19. sizing opt
  20. 6P3C-E Datasheet help
  21. on the toroids again
  22. OPT problem or Something else 6L6 PP
  23. Look what I found!
  24. Help, Diy tube amp
  25. Idea
  26. a few DIY tube amplifier setups
  27. 6L6 PP amp motorboating
  28. Mayer-inspired 4P1L
  29. 6L6 WGB 2X34W STEREO AMPL
  30. Tube Amp DIY or Retail
  31. Supplier for GU50 tubes
  32. 2E26's
  33. Encel Stereophonic M.F.B CSM 40 amplifier
  34. Mono 300B SE Amplifier
  35. Broken tubes for 3D Modelling
  36. Loud hum in one channel
  37. 6EM7 PP question
  38. 12AU7/IRF610 Hybrid Amplifier
  39. RIAA preamplifier
  40. Classic amp, Chinese or scratch-build for Quad ESL?
  41. CLASS A TUBE AMPLIFIER FOR TWEETER
  42. How to gap output transformers?
  43. Cathode bypasses - partial bypass and combination bias
  44. Phase splitter
  45. YS Audio balanced Preamp
  46. Low voltage 12AU7 (19J6) -- re "starving"
  47. phase splitter
  48. Music Angel Meng 6P1
  49. Is it possible to dampen a partially microphonic 12ax7?
  50. Pioneer SA-810 tube amp.
  51. 6C33 D.C.M.B. - Paging Ari Polisois
  52. Whose is this logo?
  53. What is grid resistance of 807/6l6 in pentode
  54. PAS Upgrade Boards by Epperson
  55. Bang and Olufsen 609k stereo se el84 fm tuner
  56. Finished EL34 tube amp... but oscilates weird..
  57. Scope Trace
  58. Drifty tubes
  59. Choosing plate voltage
  60. Determining Zout for SRPP
  61. PX25 amplifier - thoughts?
  62. Testing Ck5703 tubes
  63. When can screen voltage be higher than plate???
  64. 31AL10's
  65. Acoustic (not Audio) Alchemy - I need a wizzard
  66. current feedback
  67. dac with tube buffer/preamp
  68. Sowter 3607
  69. Back to Loftin-White
  70. What to build? (I have a lot of parts)
  71. Grounding chassis through RCA
  72. K40Y-9: Questions And Comments
  73. buffer line stage schematic
  74. Dual triode Thanks for the pre-attenuation link
  75. Help With Alps Volume Pot Noise
  76. 6AM4 driving 45???
  77. Franks 6sn7 line stage question
  78. Recommend me a schematic for El34 or KT88 ?
  79. RH84 Power supply
  80. Pentode driving a SE triode? any experience?
  81. Big tubes thread
  82. Meng Yayi KT88 MonoBlock
  83. Old Dumont Console - Story and Questions
  84. Newbie GlassWare Aikido All in One Questios
  85. Building my 1st tube amp
  86. A good tube for my SE 5K-8 OPT's
  87. 6c33 - ready, SET, GO
  88. Noisy tube rectifier goes quiet when i put my hand NEAR it
  89. Strange ancient looking tube amp
  90. Vintage Dynaco vs. Triode Electronics
  91. LINE PRE - 6N9S - 6dB
  92. Can I balance a diff stage like this?
  93. Ways to design for low IM distortion
  94. Genalex KT88 Plate Dissipation Question
  95. difference between SE and PP transformer
  96. I put a bad ouput tube in my amp, did I hurt it?
  97. Stereo amplifyer project
  98. 6sl7 6sl7 dynaco driver board
  99. PCB for stand alone 5W SE
  100. Triode VS. UL bias
  101. How to test a DIY amp?
  102. Morgan Jones 4th ed
  103. How close is too close when designing an amp
  104. Fatman I tube Problem
  105. 807 p-p tube amp schematic
  106. Listen to 6DJ8 Triode through Power Chip IC. Easy project.
  107. James O/P Tx
  108. Ripple reduction with added voltage compensation to HV
  109. SEVETLANA "SV" 6550 C vs 6550 C
  110. Frank's 6SN7 - plate follower, noise
  111. Help running RH807 at higher voltage
  112. Preamp hum issues
  113. EML mesh plate 2a3 in DRD amp
  114. How to run RH807 at 400V?
  115. Preamp Umbilical - Use Shield as Ground Lead?
  116. Automatic Bias Control sliding bias
  117. Edcor Output Transformer Resistance
  118. Would this be worthwile restoring?
  119. Historic Tube Amplifiers
  120. 6HF5 testing
  121. A quick question about NFB
  122. PAS3 - are the tone controls really *that* bad?
  123. PP OPT in SE mode operation?
  124. Cheap 6n6p double ended push-pull idea - thoughts?
  125. Vintage WE Tubes
  126. SE amplifier advice..
  127. Mineature Tubes
  128. MD SM 102b transformer spec's please
  129. Vintage Marconi radio
  130. second order harmonics
  131. Hybrid amplifier
  132. Input caps for Motorola Console Amps
  133. to much gain
  134. Question - Type 19 tube
  135. alternative for footswitch??
  136. Noob. Help PP EL34 / EF86 both as triode schem.
  137. RH84 SE, pentode driver... advice please
  138. Having an issue with a MOSFET in my Blue Hawaii
  139. Info wanted on OPT....
  140. 6P43P Strange Plate Graphs
  141. Multiple Phono preamp
  142. pas filament supply
  143. HV on high voltage amps
  144. Lageschaar hybrid-connection PSE-KT66
  145. First DIY from scratch
  146. Ballance resistors
  147. casing about SOHA I headphone amp
  148. Any interest in 56 various tubes?
  149. Help with exploding tubes!
  150. My new filiment PS for Push Pull GM70
  151. So what exactly do I have here? Heathcraft EA-2
  152. first experience with retro electronics
  153. Revising a tube pre-amp: can't find parts?
  154. Info for Pioneer SA-810 tube amp
  155. Has anyone tried tx2575 in cathode resistor?
  156. 12JZ8
  157. Is it OK to drill mounting holes in transformer laminations?
  158. Seeking Sescom Transformer Specs
  159. Calibrating a Sencor ??
  160. Capacitor in parallel with negative feedback resistor
  161. Old electronics repair store closing. Hartford. FYI. Not related
  162. CL ad for tubes in MA. FYI only. Not connected
  163. Distortion in amp after warm up
  164. Re-bias when changing from Triod to Pentode
  165. Yaqin MC-10L - Electricity in volume knob
  166. Newbie question about a 300B amplifier
  167. Modified Wavebourn Tower II ?
  168. Elevated Heater Voltages - 40v?
  169. Free Tubes!
  170. found tube i like, only small bits of red letter,what tube brands used red lettering?
  171. Impedance problem Of O/P Transformer
  172. Runaway tubes or tubes drawing excess current--baffling
  173. croft SD3 CROFT PREAMP
  174. valve phono stage on a budget
  175. Dynaco vs. Dynaclone
  176. Amplifier Problem - Need help!
  177. Idea for a 6n1p preamp
  178. K & K Audio Two Terminal Constant Current Source
  179. Counterpoint SA-12 wackyness
  180. Shuguang SG-50
  181. manley EQP-1A Tube EQ
  182. El34 PP advice needed
  183. Fosgate Punch 800 a4, diagram needed
  184. Power Transfomer For Valve Amp Question
  185. a 'simpler' tube/valve mixer topology
  186. Qustions about centre speaker connection
  187. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  188. 0d3 for el84 screen regulator
  189. Edcor XPWR059 power problem
  190. Did bootstrapping pot change it's operation
  191. Transformer wiring (Need Help)
  192. Class-d Hybrid
  193. New test data comparing different 7591's
  194. ZKIT2 Zen Triode mono SET amplifier kit
  195. Tango 11146 Output Transformers ?
  196. KT120 Tube
  197. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  198. Mu follower
  199. Aronov LS9100 - any info ???
  200. Tube Preamp Dock
  201. Grounded grid Zout
  202. HY69 in triode mode...some experience ?
  203. Bleeder Resistor (Need Help)
  204. use of 12ax7 and 6v6 as 6T9 alternative?
  205. Positive feedback for amplifier input stage
  206. Rusted OT Issue?
  207. Multiple filament windings
  208. need help with frist tube amp
  209. Testing Western Electric 437a with TV-7D/U ?
  210. Graaf 5050
  211. finished breadboard project
  212. How Much is Too Much Filtering?
  213. 2a3 - for car use?
  214. troubleshooting a Mingda MC34AB
  215. How to repair and refurbish vintage tube amps?
  216. How to repair and refurbish vintage tube amps?
  217. NYAL OTL3 Amps
  218. 6DJ8/6922 rolling... any general consensus on these?
  219. Mullard 12AU7 tests bad when running grid leakage test?
  220. Can you identify this AMP??
  221. effects of different HT voltage
  222. Substituting a 12AX7 for a 12DW7
  223. what to do with 1uF???
  224. Correct power rating for Chicago OT - opinions
  225. Need help with Stancor 1.5 K OPT Tran.
  226. S5 K8-LM mono KIT (total newbie)
  227. Pentode section of 6M11
  228. Looking for goodme proven 2A3 SE project
  229. Music Angel MENG Series EL34 Push Pull Tube Integrated Amp
  230. Tube replacement causes bias problems.
  231. Spectra of tube glow: any data?
  232. Plate Characteristics for 6158 dual triode
  233. Center tap or not...
  234. Connecting G3 to a negative supply on a pentode
  235. Dynaco FM-3 Curcuit Boards
  236. Sonic Frontiers Line 2 schematic
  237. Philips Hi Z radio amp
  238. Need help modifying tube bias circuit
  239. filament transformer current rating
  240. SE OT power tube suggestions please!
  241. What is up with this wave form?
  242. Volume Controls
  243. Help identifying driver stage
  244. Uses for Cheapo 6CB5
  245. Twin DN2540 in TubelabSE?
  246. Bias or loss of power in one channel problem
  247. Drilling a hole in a Tube :)
  248. Tube stage placement in a mongrel (hybrid) amp
  249. Quad KT88 driver
  250. Single Ended Output Transformer

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