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  1. Is it possible to dampen a partially microphonic 12ax7?
  2. Pioneer SA-810 tube amp.
  3. 6C33 D.C.M.B. - Paging Ari Polisois
  4. Whose is this logo?
  5. What is grid resistance of 807/6l6 in pentode
  6. PAS Upgrade Boards by Epperson
  7. Bang and Olufsen 609k stereo se el84 fm tuner
  8. Finished EL34 tube amp... but oscilates weird..
  9. Scope Trace
  10. Drifty tubes
  11. Choosing plate voltage
  12. Determining Zout for SRPP
  13. PX25 amplifier - thoughts?
  14. Testing Ck5703 tubes
  15. When can screen voltage be higher than plate???
  16. 31AL10's
  17. Lafayette TE-50 Tube Tester
  18. Acoustic (not Audio) Alchemy - I need a wizzard
  19. current feedback
  20. dac with tube buffer/preamp
  21. Sowter 3607
  22. Back to Loftin-White
  23. What to build? (I have a lot of parts)
  24. Grounding chassis through RCA
  25. K40Y-9: Questions And Comments
  26. buffer line stage schematic
  27. Dual triode Thanks for the pre-attenuation link
  28. Help With Alps Volume Pot Noise
  29. 6AM4 driving 45???
  30. Franks 6sn7 line stage question
  31. Recommend me a schematic for El34 or KT88 ?
  32. RH84 Power supply
  33. Pentode driving a SE triode? any experience?
  34. Big tubes thread
  35. Meng Yayi KT88 MonoBlock
  36. Old Dumont Console - Story and Questions
  37. Newbie GlassWare Aikido All in One Questios
  38. Building my 1st tube amp
  39. A good tube for my SE 5K-8 OPT's
  40. 6c33 - ready, SET, GO
  41. Noisy tube rectifier goes quiet when i put my hand NEAR it
  42. Strange ancient looking tube amp
  43. Vintage Dynaco vs. Triode Electronics
  44. LINE PRE - 6N9S - 6dB
  45. Can I balance a diff stage like this?
  46. Ways to design for low IM distortion
  47. Genalex KT88 Plate Dissipation Question
  48. difference between SE and PP transformer
  49. I put a bad ouput tube in my amp, did I hurt it?
  50. Stereo amplifyer project
  51. 6sl7 6sl7 dynaco driver board
  52. PCB for stand alone 5W SE
  53. Triode VS. UL bias
  54. How to test a DIY amp?
  55. Morgan Jones 4th ed
  56. How close is too close when designing an amp
  57. Fatman I tube Problem
  58. 807 p-p tube amp schematic
  59. Listen to 6DJ8 Triode through Power Chip IC. Easy project.
  60. James O/P Tx
  61. Ripple reduction with added voltage compensation to HV
  62. SEVETLANA "SV" 6550 C vs 6550 C
  63. Frank's 6SN7 - plate follower, noise
  64. Help running RH807 at higher voltage
  65. Preamp hum issues
  66. EML mesh plate 2a3 in DRD amp
  67. How to run RH807 at 400V?
  68. Preamp Umbilical - Use Shield as Ground Lead?
  69. Automatic Bias Control sliding bias
  70. Edcor Output Transformer Resistance
  71. Would this be worthwile restoring?
  72. Historic Tube Amplifiers
  73. 6HF5 testing
  74. A quick question about NFB
  75. PAS3 - are the tone controls really *that* bad?
  76. PP OPT in SE mode operation?
  77. Cheap 6n6p double ended push-pull idea - thoughts?
  78. Vintage WE Tubes
  79. SE amplifier advice..
  80. Mineature Tubes
  81. MD SM 102b transformer spec's please
  82. Vintage Marconi radio
  83. second order harmonics
  84. Hybrid amplifier
  85. Input caps for Motorola Console Amps
  86. to much gain
  87. Question - Type 19 tube
  88. alternative for footswitch??
  89. Noob. Help PP EL34 / EF86 both as triode schem.
  90. RH84 SE, pentode driver... advice please
  91. Having an issue with a MOSFET in my Blue Hawaii
  92. Info wanted on OPT....
  93. 6P43P Strange Plate Graphs
  94. Multiple Phono preamp
  95. pas filament supply
  96. HV on high voltage amps
  97. Lageschaar hybrid-connection PSE-KT66
  98. First DIY from scratch
  99. Ballance resistors
  100. casing about SOHA I headphone amp
  101. Any interest in 56 various tubes?
  102. Help with exploding tubes!
  103. My new filiment PS for Push Pull GM70
  104. So what exactly do I have here? Heathcraft EA-2
  105. first experience with retro electronics
  106. Revising a tube pre-amp: can't find parts?
  107. Info for Pioneer SA-810 tube amp
  108. Has anyone tried tx2575 in cathode resistor?
  109. 12JZ8
  110. Is it OK to drill mounting holes in transformer laminations?
  111. Seeking Sescom Transformer Specs
  112. Calibrating a Sencor ??
  113. Capacitor in parallel with negative feedback resistor
  114. Old electronics repair store closing. Hartford. FYI. Not related
  115. CL ad for tubes in MA. FYI only. Not connected
  116. Distortion in amp after warm up
  117. Re-bias when changing from Triod to Pentode
  118. Yaqin MC-10L - Electricity in volume knob
  119. Newbie question about a 300B amplifier
  120. Modified Wavebourn Tower II ?
  121. Elevated Heater Voltages - 40v?
  122. Free Tubes!
  123. found tube i like, only small bits of red letter,what tube brands used red lettering?
  124. Impedance problem Of O/P Transformer
  125. Runaway tubes or tubes drawing excess current--baffling
  126. croft SD3 CROFT PREAMP
  127. valve phono stage on a budget
  128. Dynaco vs. Dynaclone
  129. Amplifier Problem - Need help!
  130. Idea for a 6n1p preamp
  131. K & K Audio Two Terminal Constant Current Source
  132. Counterpoint SA-12 wackyness
  133. Shuguang SG-50
  134. manley EQP-1A Tube EQ
  135. El34 PP advice needed
  136. Fosgate Punch 800 a4, diagram needed
  137. Power Transfomer For Valve Amp Question
  138. a 'simpler' tube/valve mixer topology
  139. Qustions about centre speaker connection
  140. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  141. 0d3 for el84 screen regulator
  142. Edcor XPWR059 power problem
  143. Did bootstrapping pot change it's operation
  144. Transformer wiring (Need Help)
  145. Class-d Hybrid
  146. New test data comparing different 7591's
  147. Eico 666 Tube Tester Freaks Out When Testing Rectifier Tubes
  148. ZKIT2 Zen Triode mono SET amplifier kit
  149. Tango 11146 Output Transformers ?
  150. KT120 Tube
  151. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  152. Mu follower
  153. Aronov LS9100 - any info ???
  154. Tube Preamp Dock
  155. Grounded grid Zout
  156. HY69 in triode mode...some experience ?
  157. ITA LA 1B SCHEMATICS????
  158. Bleeder Resistor (Need Help)
  159. use of 12ax7 and 6v6 as 6T9 alternative?
  160. Positive feedback for amplifier input stage
  161. Rusted OT Issue?
  162. Multiple filament windings
  163. need help with frist tube amp
  164. Testing Western Electric 437a with TV-7D/U ?
  165. Graaf 5050
  166. finished breadboard project
  167. How Much is Too Much Filtering?
  168. 2a3 - for car use?
  169. troubleshooting a Mingda MC34AB
  170. How to repair and refurbish vintage tube amps?
  171. How to repair and refurbish vintage tube amps?
  172. NYAL OTL3 Amps
  173. 6DJ8/6922 rolling... any general consensus on these?
  174. Mullard 12AU7 tests bad when running grid leakage test?
  175. Can you identify this AMP??
  176. effects of different HT voltage
  177. Substituting a 12AX7 for a 12DW7
  178. what to do with 1uF???
  179. Correct power rating for Chicago OT - opinions
  180. Need help with Stancor 1.5 K OPT Tran.
  181. S5 K8-LM mono KIT (total newbie)
  182. Pentode section of 6M11
  183. Looking for goodme proven 2A3 SE project
  184. Music Angel MENG Series EL34 Push Pull Tube Integrated Amp
  185. Tube replacement causes bias problems.
  186. Spectra of tube glow: any data?
  187. Plate Characteristics for 6158 dual triode
  188. Center tap or not...
  189. Connecting G3 to a negative supply on a pentode
  190. Dynaco FM-3 Curcuit Boards
  191. Sonic Frontiers Line 2 schematic
  192. Philips Hi Z radio amp
  193. Need help modifying tube bias circuit
  194. filament transformer current rating
  195. SE OT power tube suggestions please!
  196. What is up with this wave form?
  197. Volume Controls
  198. Help identifying driver stage
  199. Uses for Cheapo 6CB5
  200. Twin DN2540 in TubelabSE?
  201. Bias or loss of power in one channel problem
  202. Drilling a hole in a Tube :)
  203. Tube stage placement in a mongrel (hybrid) amp
  204. Tubelab Single Ended
  205. Quad KT88 driver
  206. Single Ended Output Transformer
  207. 300B with interstage
  208. Problem with Aria (Meng) Mini 6p1 (glowing plate)
  209. possible to filter dips in AC line?
  210. Weston Ammeter Headphone Amp Prototype
  211. What is the fault with this amp?
  212. k-12G turret board version
  213. low voltage "high gain" amp
  214. Connect ipod/laptop to old 1950's radio
  215. (Weston Ammeter Headphone Amp Redux ?)
  216. Would it be possible to drive a 300b with new power jfets?
  217. Would it be possible to drive a 300b with new power jfets?
  218. Will KT88 increase output power in Copland CTA-402
  219. Music Angel XD-SE EL34 intermittent thump
  220. OPT with cathode feedback
  221. Rebuilding fisher sa-1000
  222. Little Dot Mk IV SE
  223. EF86 on HICKOK 752a tester..??
  224. Choke power supplies and bypassing.
  225. Load resistor on OPT
  226. Ultimate Octal
  227. Help needed for 6H30 output schematic for DAC
  228. KT88 doubt
  229. Leave it on or turn it off?
  230. Did I do this loadline correctly
  231. Masco MA-35 rebuild
  232. Motorola SE console amp blown fuse
  233. What to do with Telefunken parts?
  234. OT as buffer?
  235. Single ended EL84 Schematic
  236. Pattern for power xmfr magnetic leaking ?
  237. heater voltage
  238. Small Speakers for 5 channel single ended amp
  239. missing circuit components- why?
  240. What to do with a 6N14P/ECC84
  241. Info for very rare neon tubes?
  242. UL for EL84. 22-24% is better than the dogma....40% is lowest distortion....
  243. Jan Tube question
  244. 60 watt tubeamp with Low B+
  245. What types of SET rock the hardest?
  246. UTC A16 interstage 300B
  247. 6C33
  248. Need wiring schematic for Conn 6050 amp
  249. 6N6P at very low voltage
  250. Transformer Swap

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