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  1. 2 Chassis amp
  2. Is It posible to bridge two quad II monoblocks?
  3. Power tube at work picture
  4. Tube SE power amp , which one??
  5. Hickok 539A issue
  6. Noise in one channel? Pioneer SX-400
  7. Hartung / Prestla OTL amps
  8. Lafayette Model 417
  9. Extreme plate load
  10. What do you think about this idea
  11. el84pse schem, need advice
  12. Video pentodes as outputs
  13. Custom Vibrolux Reverb noise issue
  14. Chinese "Audio Research" KT88s
  15. Fender bandmaster rectifire problem.
  16. New 6C33 Socket
  17. 2a3 PP output transformer
  18. PSU problem - Murphy is an ***hole!
  19. Best SET design?
  20. Anybody ever tried EBC41 as 12AX7 substitute?
  21. The 7242
  22. 12bh7a
  23. Phase Splitter Help
  24. Oscilloscope Question
  25. sizing opt
  26. 6P3C-E Datasheet help
  27. on the toroids again
  28. OPT problem or Something else 6L6 PP
  29. Look what I found!
  30. Help, Diy tube amp
  31. Idea
  32. a few DIY tube amplifier setups
  33. 6L6 PP amp motorboating
  34. Mayer-inspired 4P1L
  35. 6L6 WGB 2X34W STEREO AMPL
  36. Isolation transformation wiring project help
  37. Tube Amp DIY or Retail
  38. Supplier for GU50 tubes
  39. 2E26's
  40. Encel Stereophonic M.F.B CSM 40 amplifier
  41. Mono 300B SE Amplifier
  42. Broken tubes for 3D Modelling
  43. Loud hum in one channel
  44. 6EM7 PP question
  45. 12AU7/IRF610 Hybrid Amplifier
  46. 12AU7/IRF610 Hybrid Amplifier
  47. RIAA preamplifier
  48. Classic amp, Chinese or scratch-build for Quad ESL?
  49. CLASS A TUBE AMPLIFIER FOR TWEETER
  50. How to gap output transformers?
  51. Cathode bypasses - partial bypass and combination bias
  52. Phase splitter
  53. YS Audio balanced Preamp
  54. Low voltage 12AU7 (19J6) -- re "starving"
  55. phase splitter
  56. JTM30 output transformer
  57. Music Angel Meng 6P1
  58. Is it possible to dampen a partially microphonic 12ax7?
  59. Pioneer SA-810 tube amp.
  60. 6C33 D.C.M.B. - Paging Ari Polisois
  61. Whose is this logo?
  62. What is grid resistance of 807/6l6 in pentode
  63. PAS Upgrade Boards by Epperson
  64. Bang and Olufsen 609k stereo se el84 fm tuner
  65. Finished EL34 tube amp... but oscilates weird..
  66. Scope Trace
  67. Drifty tubes
  68. Choosing plate voltage
  69. Determining Zout for SRPP
  70. PX25 amplifier - thoughts?
  71. Testing Ck5703 tubes
  72. When can screen voltage be higher than plate???
  73. 31AL10's
  74. Lafayette TE-50 Tube Tester
  75. Acoustic (not Audio) Alchemy - I need a wizzard
  76. current feedback
  77. dac with tube buffer/preamp
  78. Sowter 3607
  79. Back to Loftin-White
  80. What to build? (I have a lot of parts)
  81. Grounding chassis through RCA
  82. K40Y-9: Questions And Comments
  83. buffer line stage schematic
  84. Dual triode Thanks for the pre-attenuation link
  85. Help With Alps Volume Pot Noise
  86. 6AM4 driving 45???
  87. Franks 6sn7 line stage question
  88. Edcor power tx XPWR035 issue
  89. Recommend me a schematic for El34 or KT88 ?
  90. RH84 Power supply
  91. Pentode driving a SE triode? any experience?
  92. Big tubes thread
  93. Meng Yayi KT88 MonoBlock
  94. Old Dumont Console - Story and Questions
  95. Newbie GlassWare Aikido All in One Questios
  96. Building my 1st tube amp
  97. A good tube for my SE 5K-8 OPT's
  98. 6c33 - ready, SET, GO
  99. Noisy tube rectifier goes quiet when i put my hand NEAR it
  100. Tweed 5E3 Deluxe Project Problems
  101. Strange ancient looking tube amp
  102. Vintage Dynaco vs. Triode Electronics
  103. LINE PRE - 6N9S - 6dB
  104. Can I balance a diff stage like this?
  105. Ways to design for low IM distortion
  106. Genalex KT88 Plate Dissipation Question
  107. difference between SE and PP transformer
  108. I put a bad ouput tube in my amp, did I hurt it?
  109. Vox AV 100 Mk2
  110. Stereo amplifyer project
  111. 6sl7 6sl7 dynaco driver board
  112. PCB for stand alone 5W SE
  113. Triode VS. UL bias
  114. How to test a DIY amp?
  115. Morgan Jones 4th ed
  116. How close is too close when designing an amp
  117. Fatman I tube Problem
  118. 807 p-p tube amp schematic
  119. TUBELAB SIMPLE SE
  120. Listen to 6DJ8 Triode through Power Chip IC. Easy project.
  121. Cheap motor caps(MKP) vs Electrolitics
  122. James O/P Tx
  123. Ripple reduction with added voltage compensation to HV
  124. SEVETLANA "SV" 6550 C vs 6550 C
  125. Frank's 6SN7 - plate follower, noise
  126. Help running RH807 at higher voltage
  127. Preamp hum issues
  128. EML mesh plate 2a3 in DRD amp
  129. How to run RH807 at 400V?
  130. Preamp Umbilical - Use Shield as Ground Lead?
  131. Automatic Bias Control sliding bias
  132. Edcor Output Transformer Resistance
  133. Would this be worthwile restoring?
  134. Historic Tube Amplifiers
  135. 6HF5 testing
  136. A quick question about NFB
  137. PAS3 - are the tone controls really *that* bad?
  138. PP OPT in SE mode operation?
  139. Cheap 6n6p double ended push-pull idea - thoughts?
  140. Vintage WE Tubes
  141. SE amplifier advice..
  142. Mineature Tubes
  143. MD SM 102b transformer spec's please
  144. Vintage Marconi radio
  145. second order harmonics
  146. Hybrid amplifier
  147. Input caps for Motorola Console Amps
  148. to much gain
  149. Question - Type 19 tube
  150. alternative for footswitch??
  151. Noob. Help PP EL34 / EF86 both as triode schem.
  152. Yet another LA-2A
  153. RH84 SE, pentode driver... advice please
  154. Having an issue with a MOSFET in my Blue Hawaii
  155. Info wanted on OPT....
  156. 6P43P Strange Plate Graphs
  157. Multiple Phono preamp
  158. pas filament supply
  159. HV on high voltage amps
  160. Lageschaar hybrid-connection PSE-KT66
  161. First DIY from scratch
  162. Ballance resistors
  163. casing about SOHA I headphone amp
  164. Any interest in 56 various tubes?
  165. Help with exploding tubes!
  166. My new filiment PS for Push Pull GM70
  167. So what exactly do I have here? Heathcraft EA-2
  168. Please help identify this Amveco toroidal transformer.
  169. first experience with retro electronics
  170. Revising a tube pre-amp: can't find parts?
  171. Info for Pioneer SA-810 tube amp
  172. Has anyone tried tx2575 in cathode resistor?
  173. 12JZ8
  174. Is it OK to drill mounting holes in transformer laminations?
  175. Seeking Sescom Transformer Specs
  176. Calibrating a Sencor ??
  177. Capacitor in parallel with negative feedback resistor
  178. Old electronics repair store closing. Hartford. FYI. Not related
  179. CL ad for tubes in MA. FYI only. Not connected
  180. Distortion in amp after warm up
  181. Re-bias when changing from Triod to Pentode
  182. Yaqin MC-10L - Electricity in volume knob
  183. Newbie question about a 300B amplifier
  184. Modified Wavebourn Tower II ?
  185. Elevated Heater Voltages - 40v?
  186. Free Tubes!
  187. found tube i like, only small bits of red letter,what tube brands used red lettering?
  188. Impedance problem Of O/P Transformer
  189. Runaway tubes or tubes drawing excess current--baffling
  190. croft SD3 CROFT PREAMP
  191. valve phono stage on a budget
  192. Dynaco vs. Dynaclone
  193. Amplifier Problem - Need help!
  194. Idea for a 6n1p preamp
  195. K & K Audio Two Terminal Constant Current Source
  196. 6550 Push Pull noise in power stage
  197. 6P1P-EV PP guitar amp tryout.
  198. question about output transformer for guitar amp
  199. Hammond B3 tech help needed. Distortion only on certain notes/drawbar frequencies.
  200. Counterpoint SA-12 wackyness
  201. Shuguang SG-50
  202. manley EQP-1A Tube EQ
  203. El34 PP advice needed
  204. Fosgate Punch 800 a4, diagram needed
  205. Power Transfomer For Valve Amp Question
  206. a 'simpler' tube/valve mixer topology
  207. Qustions about centre speaker connection
  208. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  209. 0d3 for el84 screen regulator
  210. Edcor XPWR059 power problem
  211. Did bootstrapping pot change it's operation
  212. Transformer wiring (Need Help)
  213. Class-d Hybrid
  214. New test data comparing different 7591's
  215. Eico 666 Tube Tester Freaks Out When Testing Rectifier Tubes
  216. ZKIT2 Zen Triode mono SET amplifier kit
  217. Tango 11146 Output Transformers ?
  218. KT120 Tube
  219. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  220. Mu follower
  221. Aronov LS9100 - any info ???
  222. Tube Preamp Dock
  223. Substituting potentiometers
  224. Grounded grid Zout
  225. HY69 in triode mode...some experience ?
  226. ITA LA 1B SCHEMATICS????
  227. Thoughts on PSU
  228. Bleeder Resistor (Need Help)
  229. use of 12ax7 and 6v6 as 6T9 alternative?
  230. Do I want fast settling or massive filtration in PS?
  231. Positive feedback for amplifier input stage
  232. Rusted OT Issue?
  233. Multiple filament windings
  234. need help with frist tube amp
  235. Testing Western Electric 437a with TV-7D/U ?
  236. Graaf 5050
  237. finished breadboard project
  238. How Much is Too Much Filtering?
  239. 2a3 - for car use?
  240. troubleshooting a Mingda MC34AB
  241. How to repair and refurbish vintage tube amps?
  242. How to repair and refurbish vintage tube amps?
  243. NYAL OTL3 Amps
  244. 6DJ8/6922 rolling... any general consensus on these?
  245. Mullard 12AU7 tests bad when running grid leakage test?
  246. Can you identify this AMP??
  247. effects of different HT voltage
  248. Substituting a 12AX7 for a 12DW7
  249. what to do with 1uF???
  250. Correct power rating for Chicago OT - opinions

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