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  1. on the toroids again
  2. OPT problem or Something else 6L6 PP
  3. Look what I found!
  4. Help, Diy tube amp
  5. Idea
  6. a few DIY tube amplifier setups
  7. 6L6 PP amp motorboating
  8. Mayer-inspired 4P1L
  9. 6L6 WGB 2X34W STEREO AMPL
  10. Isolation transformation wiring project help
  11. Tube Amp DIY or Retail
  12. Supplier for GU50 tubes
  13. 2E26's
  14. Encel Stereophonic M.F.B CSM 40 amplifier
  15. Mono 300B SE Amplifier
  16. Broken tubes for 3D Modelling
  17. Loud hum in one channel
  18. 6EM7 PP question
  19. 12AU7/IRF610 Hybrid Amplifier
  20. 12AU7/IRF610 Hybrid Amplifier
  21. RIAA preamplifier
  22. Classic amp, Chinese or scratch-build for Quad ESL?
  23. CLASS A TUBE AMPLIFIER FOR TWEETER
  24. How to gap output transformers?
  25. Cathode bypasses - partial bypass and combination bias
  26. Phase splitter
  27. YS Audio balanced Preamp
  28. Low voltage 12AU7 (19J6) -- re "starving"
  29. phase splitter
  30. JTM30 output transformer
  31. Music Angel Meng 6P1
  32. Is it possible to dampen a partially microphonic 12ax7?
  33. Pioneer SA-810 tube amp.
  34. 6C33 D.C.M.B. - Paging Ari Polisois
  35. Whose is this logo?
  36. What is grid resistance of 807/6l6 in pentode
  37. PAS Upgrade Boards by Epperson
  38. Bang and Olufsen 609k stereo se el84 fm tuner
  39. Finished EL34 tube amp... but oscilates weird..
  40. Scope Trace
  41. Drifty tubes
  42. Choosing plate voltage
  43. Determining Zout for SRPP
  44. PX25 amplifier - thoughts?
  45. Testing Ck5703 tubes
  46. When can screen voltage be higher than plate???
  47. 31AL10's
  48. Lafayette TE-50 Tube Tester
  49. Acoustic (not Audio) Alchemy - I need a wizzard
  50. current feedback
  51. dac with tube buffer/preamp
  52. Sowter 3607
  53. Back to Loftin-White
  54. What to build? (I have a lot of parts)
  55. Grounding chassis through RCA
  56. K40Y-9: Questions And Comments
  57. buffer line stage schematic
  58. Dual triode Thanks for the pre-attenuation link
  59. Help With Alps Volume Pot Noise
  60. 6AM4 driving 45???
  61. Franks 6sn7 line stage question
  62. Edcor power tx XPWR035 issue
  63. Recommend me a schematic for El34 or KT88 ?
  64. RH84 Power supply
  65. Pentode driving a SE triode? any experience?
  66. Big tubes thread
  67. Meng Yayi KT88 MonoBlock
  68. Old Dumont Console - Story and Questions
  69. Newbie GlassWare Aikido All in One Questios
  70. Building my 1st tube amp
  71. A good tube for my SE 5K-8 OPT's
  72. 6c33 - ready, SET, GO
  73. Noisy tube rectifier goes quiet when i put my hand NEAR it
  74. Tweed 5E3 Deluxe Project Problems
  75. Strange ancient looking tube amp
  76. Vintage Dynaco vs. Triode Electronics
  77. LINE PRE - 6N9S - 6dB
  78. Can I balance a diff stage like this?
  79. Ways to design for low IM distortion
  80. Genalex KT88 Plate Dissipation Question
  81. difference between SE and PP transformer
  82. I put a bad ouput tube in my amp, did I hurt it?
  83. Vox AV 100 Mk2
  84. Stereo amplifyer project
  85. 6sl7 6sl7 dynaco driver board
  86. PCB for stand alone 5W SE
  87. Triode VS. UL bias
  88. How to test a DIY amp?
  89. Morgan Jones 4th ed
  90. How close is too close when designing an amp
  91. Fatman I tube Problem
  92. 807 p-p tube amp schematic
  93. TUBELAB SIMPLE SE
  94. Listen to 6DJ8 Triode through Power Chip IC. Easy project.
  95. Cheap motor caps(MKP) vs Electrolitics
  96. James O/P Tx
  97. Ripple reduction with added voltage compensation to HV
  98. SEVETLANA "SV" 6550 C vs 6550 C
  99. Frank's 6SN7 - plate follower, noise
  100. Help running RH807 at higher voltage
  101. Preamp hum issues
  102. EML mesh plate 2a3 in DRD amp
  103. How to run RH807 at 400V?
  104. Preamp Umbilical - Use Shield as Ground Lead?
  105. Automatic Bias Control sliding bias
  106. Edcor Output Transformer Resistance
  107. Would this be worthwile restoring?
  108. Historic Tube Amplifiers
  109. 6HF5 testing
  110. A quick question about NFB
  111. PAS3 - are the tone controls really *that* bad?
  112. PP OPT in SE mode operation?
  113. Cheap 6n6p double ended push-pull idea - thoughts?
  114. Vintage WE Tubes
  115. SE amplifier advice..
  116. Mineature Tubes
  117. MD SM 102b transformer spec's please
  118. Vintage Marconi radio
  119. second order harmonics
  120. Hybrid amplifier
  121. Input caps for Motorola Console Amps
  122. to much gain
  123. Question - Type 19 tube
  124. alternative for footswitch??
  125. Noob. Help PP EL34 / EF86 both as triode schem.
  126. Yet another LA-2A
  127. RH84 SE, pentode driver... advice please
  128. Having an issue with a MOSFET in my Blue Hawaii
  129. Info wanted on OPT....
  130. 6P43P Strange Plate Graphs
  131. Multiple Phono preamp
  132. pas filament supply
  133. HV on high voltage amps
  134. Lageschaar hybrid-connection PSE-KT66
  135. First DIY from scratch
  136. Ballance resistors
  137. casing about SOHA I headphone amp
  138. Any interest in 56 various tubes?
  139. Help with exploding tubes!
  140. My new filiment PS for Push Pull GM70
  141. So what exactly do I have here? Heathcraft EA-2
  142. Please help identify this Amveco toroidal transformer.
  143. first experience with retro electronics
  144. Revising a tube pre-amp: can't find parts?
  145. Info for Pioneer SA-810 tube amp
  146. Has anyone tried tx2575 in cathode resistor?
  147. 12JZ8
  148. Is it OK to drill mounting holes in transformer laminations?
  149. Seeking Sescom Transformer Specs
  150. Calibrating a Sencor ??
  151. Capacitor in parallel with negative feedback resistor
  152. Old electronics repair store closing. Hartford. FYI. Not related
  153. CL ad for tubes in MA. FYI only. Not connected
  154. Distortion in amp after warm up
  155. Re-bias when changing from Triod to Pentode
  156. Yaqin MC-10L - Electricity in volume knob
  157. Newbie question about a 300B amplifier
  158. Modified Wavebourn Tower II ?
  159. Elevated Heater Voltages - 40v?
  160. Free Tubes!
  161. found tube i like, only small bits of red letter,what tube brands used red lettering?
  162. Impedance problem Of O/P Transformer
  163. Runaway tubes or tubes drawing excess current--baffling
  164. croft SD3 CROFT PREAMP
  165. valve phono stage on a budget
  166. Dynaco vs. Dynaclone
  167. Amplifier Problem - Need help!
  168. Idea for a 6n1p preamp
  169. K & K Audio Two Terminal Constant Current Source
  170. 6550 Push Pull noise in power stage
  171. 6P1P-EV PP guitar amp tryout.
  172. question about output transformer for guitar amp
  173. Hammond B3 tech help needed. Distortion only on certain notes/drawbar frequencies.
  174. Counterpoint SA-12 wackyness
  175. Shuguang SG-50
  176. manley EQP-1A Tube EQ
  177. El34 PP advice needed
  178. Fosgate Punch 800 a4, diagram needed
  179. Power Transfomer For Valve Amp Question
  180. a 'simpler' tube/valve mixer topology
  181. Qustions about centre speaker connection
  182. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  183. 0d3 for el84 screen regulator
  184. Edcor XPWR059 power problem
  185. Did bootstrapping pot change it's operation
  186. Transformer wiring (Need Help)
  187. Class-d Hybrid
  188. New test data comparing different 7591's
  189. Eico 666 Tube Tester Freaks Out When Testing Rectifier Tubes
  190. ZKIT2 Zen Triode mono SET amplifier kit
  191. Tango 11146 Output Transformers ?
  192. KT120 Tube
  193. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  194. Mu follower
  195. Aronov LS9100 - any info ???
  196. Tube Preamp Dock
  197. Substituting potentiometers
  198. Grounded grid Zout
  199. HY69 in triode mode...some experience ?
  200. ITA LA 1B SCHEMATICS????
  201. Thoughts on PSU
  202. Bleeder Resistor (Need Help)
  203. use of 12ax7 and 6v6 as 6T9 alternative?
  204. Do I want fast settling or massive filtration in PS?
  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. Tube mixing console
  245. Uses for Cheapo 6CB5
  246. Twin DN2540 in TubelabSE?
  247. Bias or loss of power in one channel problem
  248. Drilling a hole in a Tube :)
  249. Tube stage placement in a mongrel (hybrid) amp
  250. Tubelab Single Ended

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