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  1. The 7242
  2. 12bh7a
  3. Phase Splitter Help
  4. Oscilloscope Question
  5. sizing opt
  6. 6P3C-E Datasheet help
  7. on the toroids again
  8. OPT problem or Something else 6L6 PP
  9. Look what I found!
  10. Help, Diy tube amp
  11. Idea
  12. a few DIY tube amplifier setups
  13. 6L6 PP amp motorboating
  14. Mayer-inspired 4P1L
  15. 6L6 WGB 2X34W STEREO AMPL
  16. Isolation transformation wiring project help
  17. Tube Amp DIY or Retail
  18. Supplier for GU50 tubes
  19. 2E26's
  20. Encel Stereophonic M.F.B CSM 40 amplifier
  21. Mono 300B SE Amplifier
  22. Broken tubes for 3D Modelling
  23. Loud hum in one channel
  24. 6EM7 PP question
  25. 12AU7/IRF610 Hybrid Amplifier
  26. 12AU7/IRF610 Hybrid Amplifier
  27. RIAA preamplifier
  28. Classic amp, Chinese or scratch-build for Quad ESL?
  29. CLASS A TUBE AMPLIFIER FOR TWEETER
  30. How to gap output transformers?
  31. Cathode bypasses - partial bypass and combination bias
  32. Phase splitter
  33. YS Audio balanced Preamp
  34. Low voltage 12AU7 (19J6) -- re "starving"
  35. phase splitter
  36. JTM30 output transformer
  37. Music Angel Meng 6P1
  38. Is it possible to dampen a partially microphonic 12ax7?
  39. Pioneer SA-810 tube amp.
  40. 6C33 D.C.M.B. - Paging Ari Polisois
  41. Whose is this logo?
  42. What is grid resistance of 807/6l6 in pentode
  43. PAS Upgrade Boards by Epperson
  44. Bang and Olufsen 609k stereo se el84 fm tuner
  45. Finished EL34 tube amp... but oscilates weird..
  46. Scope Trace
  47. Drifty tubes
  48. Choosing plate voltage
  49. Determining Zout for SRPP
  50. PX25 amplifier - thoughts?
  51. Testing Ck5703 tubes
  52. When can screen voltage be higher than plate???
  53. 31AL10's
  54. Lafayette TE-50 Tube Tester
  55. Acoustic (not Audio) Alchemy - I need a wizzard
  56. current feedback
  57. dac with tube buffer/preamp
  58. Sowter 3607
  59. Back to Loftin-White
  60. What to build? (I have a lot of parts)
  61. Grounding chassis through RCA
  62. K40Y-9: Questions And Comments
  63. buffer line stage schematic
  64. Dual triode Thanks for the pre-attenuation link
  65. Help With Alps Volume Pot Noise
  66. 6AM4 driving 45???
  67. Franks 6sn7 line stage question
  68. Edcor power tx XPWR035 issue
  69. Recommend me a schematic for El34 or KT88 ?
  70. RH84 Power supply
  71. Pentode driving a SE triode? any experience?
  72. Big tubes thread
  73. Meng Yayi KT88 MonoBlock
  74. Old Dumont Console - Story and Questions
  75. Newbie GlassWare Aikido All in One Questios
  76. Building my 1st tube amp
  77. A good tube for my SE 5K-8 OPT's
  78. 6c33 - ready, SET, GO
  79. Noisy tube rectifier goes quiet when i put my hand NEAR it
  80. Tweed 5E3 Deluxe Project Problems
  81. Strange ancient looking tube amp
  82. Vintage Dynaco vs. Triode Electronics
  83. LINE PRE - 6N9S - 6dB
  84. Can I balance a diff stage like this?
  85. Ways to design for low IM distortion
  86. Genalex KT88 Plate Dissipation Question
  87. difference between SE and PP transformer
  88. I put a bad ouput tube in my amp, did I hurt it?
  89. Vox AV 100 Mk2
  90. Stereo amplifyer project
  91. 6sl7 6sl7 dynaco driver board
  92. PCB for stand alone 5W SE
  93. Triode VS. UL bias
  94. How to test a DIY amp?
  95. Morgan Jones 4th ed
  96. How close is too close when designing an amp
  97. Fatman I tube Problem
  98. 807 p-p tube amp schematic
  99. TUBELAB SIMPLE SE
  100. Listen to 6DJ8 Triode through Power Chip IC. Easy project.
  101. Cheap motor caps(MKP) vs Electrolitics
  102. James O/P Tx
  103. Ripple reduction with added voltage compensation to HV
  104. SEVETLANA "SV" 6550 C vs 6550 C
  105. Frank's 6SN7 - plate follower, noise
  106. Help running RH807 at higher voltage
  107. Preamp hum issues
  108. EML mesh plate 2a3 in DRD amp
  109. How to run RH807 at 400V?
  110. Preamp Umbilical - Use Shield as Ground Lead?
  111. Automatic Bias Control sliding bias
  112. Edcor Output Transformer Resistance
  113. Would this be worthwile restoring?
  114. Historic Tube Amplifiers
  115. 6HF5 testing
  116. A quick question about NFB
  117. PAS3 - are the tone controls really *that* bad?
  118. PP OPT in SE mode operation?
  119. Cheap 6n6p double ended push-pull idea - thoughts?
  120. Vintage WE Tubes
  121. SE amplifier advice..
  122. Mineature Tubes
  123. MD SM 102b transformer spec's please
  124. Vintage Marconi radio
  125. second order harmonics
  126. Hybrid amplifier
  127. Input caps for Motorola Console Amps
  128. to much gain
  129. Question - Type 19 tube
  130. alternative for footswitch??
  131. Noob. Help PP EL34 / EF86 both as triode schem.
  132. Yet another LA-2A
  133. RH84 SE, pentode driver... advice please
  134. Having an issue with a MOSFET in my Blue Hawaii
  135. Info wanted on OPT....
  136. 6P43P Strange Plate Graphs
  137. Multiple Phono preamp
  138. pas filament supply
  139. HV on high voltage amps
  140. Lageschaar hybrid-connection PSE-KT66
  141. First DIY from scratch
  142. Ballance resistors
  143. casing about SOHA I headphone amp
  144. Any interest in 56 various tubes?
  145. Help with exploding tubes!
  146. My new filiment PS for Push Pull GM70
  147. So what exactly do I have here? Heathcraft EA-2
  148. Please help identify this Amveco toroidal transformer.
  149. first experience with retro electronics
  150. Revising a tube pre-amp: can't find parts?
  151. Info for Pioneer SA-810 tube amp
  152. Has anyone tried tx2575 in cathode resistor?
  153. 12JZ8
  154. Is it OK to drill mounting holes in transformer laminations?
  155. Seeking Sescom Transformer Specs
  156. Calibrating a Sencor ??
  157. Capacitor in parallel with negative feedback resistor
  158. Old electronics repair store closing. Hartford. FYI. Not related
  159. CL ad for tubes in MA. FYI only. Not connected
  160. Distortion in amp after warm up
  161. Re-bias when changing from Triod to Pentode
  162. Yaqin MC-10L - Electricity in volume knob
  163. Newbie question about a 300B amplifier
  164. Modified Wavebourn Tower II ?
  165. Elevated Heater Voltages - 40v?
  166. Free Tubes!
  167. found tube i like, only small bits of red letter,what tube brands used red lettering?
  168. Impedance problem Of O/P Transformer
  169. Runaway tubes or tubes drawing excess current--baffling
  170. croft SD3 CROFT PREAMP
  171. valve phono stage on a budget
  172. Dynaco vs. Dynaclone
  173. Amplifier Problem - Need help!
  174. Idea for a 6n1p preamp
  175. K & K Audio Two Terminal Constant Current Source
  176. 6550 Push Pull noise in power stage
  177. 6P1P-EV PP guitar amp tryout.
  178. question about output transformer for guitar amp
  179. Hammond B3 tech help needed. Distortion only on certain notes/drawbar frequencies.
  180. Counterpoint SA-12 wackyness
  181. Shuguang SG-50
  182. manley EQP-1A Tube EQ
  183. El34 PP advice needed
  184. Fosgate Punch 800 a4, diagram needed
  185. Power Transfomer For Valve Amp Question
  186. a 'simpler' tube/valve mixer topology
  187. Qustions about centre speaker connection
  188. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  189. 0d3 for el84 screen regulator
  190. Edcor XPWR059 power problem
  191. Did bootstrapping pot change it's operation
  192. Transformer wiring (Need Help)
  193. Class-d Hybrid
  194. New test data comparing different 7591's
  195. Eico 666 Tube Tester Freaks Out When Testing Rectifier Tubes
  196. ZKIT2 Zen Triode mono SET amplifier kit
  197. Tango 11146 Output Transformers ?
  198. KT120 Tube
  199. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  200. Mu follower
  201. Aronov LS9100 - any info ???
  202. Tube Preamp Dock
  203. Substituting potentiometers
  204. Grounded grid Zout
  205. HY69 in triode mode...some experience ?
  206. ITA LA 1B SCHEMATICS????
  207. Thoughts on PSU
  208. Bleeder Resistor (Need Help)
  209. use of 12ax7 and 6v6 as 6T9 alternative?
  210. Do I want fast settling or massive filtration in PS?
  211. Positive feedback for amplifier input stage
  212. Rusted OT Issue?
  213. Multiple filament windings
  214. need help with frist tube amp
  215. Testing Western Electric 437a with TV-7D/U ?
  216. Graaf 5050
  217. finished breadboard project
  218. How Much is Too Much Filtering?
  219. 2a3 - for car use?
  220. troubleshooting a Mingda MC34AB
  221. How to repair and refurbish vintage tube amps?
  222. How to repair and refurbish vintage tube amps?
  223. NYAL OTL3 Amps
  224. 6DJ8/6922 rolling... any general consensus on these?
  225. Mullard 12AU7 tests bad when running grid leakage test?
  226. Can you identify this AMP??
  227. effects of different HT voltage
  228. Substituting a 12AX7 for a 12DW7
  229. what to do with 1uF???
  230. Correct power rating for Chicago OT - opinions
  231. Need help with Stancor 1.5 K OPT Tran.
  232. S5 K8-LM mono KIT (total newbie)
  233. Pentode section of 6M11
  234. Looking for goodme proven 2A3 SE project
  235. Music Angel MENG Series EL34 Push Pull Tube Integrated Amp
  236. Tube replacement causes bias problems.
  237. Spectra of tube glow: any data?
  238. Plate Characteristics for 6158 dual triode
  239. Center tap or not...
  240. Connecting G3 to a negative supply on a pentode
  241. Dynaco FM-3 Curcuit Boards
  242. Sonic Frontiers Line 2 schematic
  243. Philips Hi Z radio amp
  244. Need help modifying tube bias circuit
  245. filament transformer current rating
  246. SE OT power tube suggestions please!
  247. What is up with this wave form?
  248. Volume Controls
  249. Help identifying driver stage
  250. Tube mixing console

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