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  1. What did I buy??
  2. Edcor and Custom Power Transformer Design
  3. What would you make with this power TX?
  4. Lundahl 1676
  5. DHT for 300B problem
  6. Newbie question about output transformer to speaker matching
  7. Red board add-on phono/RIAA pre-amp
  8. 2 Chassis amp
  9. Is It posible to bridge two quad II monoblocks?
  10. Power tube at work picture
  11. Tube SE power amp , which one??
  12. Noise in one channel? Pioneer SX-400
  13. Hartung / Prestla OTL amps
  14. Lafayette Model 417
  15. Extreme plate load
  16. What do you think about this idea
  17. el84pse schem, need advice
  18. Video pentodes as outputs
  19. Chinese "Audio Research" KT88s
  20. New 6C33 Socket
  21. 2a3 PP output transformer
  22. Best SET design?
  23. Anybody ever tried EBC41 as 12AX7 substitute?
  24. The 7242
  25. 12bh7a
  26. Phase Splitter Help
  27. Oscilloscope Question
  28. sizing opt
  29. 6P3C-E Datasheet help
  30. on the toroids again
  31. OPT problem or Something else 6L6 PP
  32. Look what I found!
  33. Help, Diy tube amp
  34. Idea
  35. a few DIY tube amplifier setups
  36. 6L6 PP amp motorboating
  37. Mayer-inspired 4P1L
  38. 6L6 WGB 2X34W STEREO AMPL
  39. Tube Amp DIY or Retail
  40. Supplier for GU50 tubes
  41. 2E26's
  42. Encel Stereophonic M.F.B CSM 40 amplifier
  43. Mono 300B SE Amplifier
  44. Broken tubes for 3D Modelling
  45. Loud hum in one channel
  46. 6EM7 PP question
  47. 12AU7/IRF610 Hybrid Amplifier
  48. RIAA preamplifier
  49. Classic amp, Chinese or scratch-build for Quad ESL?
  50. CLASS A TUBE AMPLIFIER FOR TWEETER
  51. How to gap output transformers?
  52. Cathode bypasses - partial bypass and combination bias
  53. Phase splitter
  54. YS Audio balanced Preamp
  55. Low voltage 12AU7 (19J6) -- re "starving"
  56. phase splitter
  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. Acoustic (not Audio) Alchemy - I need a wizzard
  75. current feedback
  76. dac with tube buffer/preamp
  77. Sowter 3607
  78. Back to Loftin-White
  79. What to build? (I have a lot of parts)
  80. Grounding chassis through RCA
  81. K40Y-9: Questions And Comments
  82. buffer line stage schematic
  83. Dual triode Thanks for the pre-attenuation link
  84. Help With Alps Volume Pot Noise
  85. 6AM4 driving 45???
  86. Franks 6sn7 line stage question
  87. Recommend me a schematic for El34 or KT88 ?
  88. RH84 Power supply
  89. Pentode driving a SE triode? any experience?
  90. Big tubes thread
  91. Meng Yayi KT88 MonoBlock
  92. Old Dumont Console - Story and Questions
  93. Newbie GlassWare Aikido All in One Questios
  94. Building my 1st tube amp
  95. A good tube for my SE 5K-8 OPT's
  96. 6c33 - ready, SET, GO
  97. Noisy tube rectifier goes quiet when i put my hand NEAR it
  98. Strange ancient looking tube amp
  99. Vintage Dynaco vs. Triode Electronics
  100. LINE PRE - 6N9S - 6dB
  101. Can I balance a diff stage like this?
  102. Ways to design for low IM distortion
  103. Genalex KT88 Plate Dissipation Question
  104. difference between SE and PP transformer
  105. I put a bad ouput tube in my amp, did I hurt it?
  106. Stereo amplifyer project
  107. 6sl7 6sl7 dynaco driver board
  108. PCB for stand alone 5W SE
  109. Triode VS. UL bias
  110. How to test a DIY amp?
  111. Morgan Jones 4th ed
  112. How close is too close when designing an amp
  113. Fatman I tube Problem
  114. 807 p-p tube amp schematic
  115. Listen to 6DJ8 Triode through Power Chip IC. Easy project.
  116. James O/P Tx
  117. Ripple reduction with added voltage compensation to HV
  118. SEVETLANA "SV" 6550 C vs 6550 C
  119. Frank's 6SN7 - plate follower, noise
  120. Help running RH807 at higher voltage
  121. Preamp hum issues
  122. EML mesh plate 2a3 in DRD amp
  123. How to run RH807 at 400V?
  124. Preamp Umbilical - Use Shield as Ground Lead?
  125. Automatic Bias Control sliding bias
  126. Edcor Output Transformer Resistance
  127. Would this be worthwile restoring?
  128. Historic Tube Amplifiers
  129. 6HF5 testing
  130. A quick question about NFB
  131. PAS3 - are the tone controls really *that* bad?
  132. PP OPT in SE mode operation?
  133. Cheap 6n6p double ended push-pull idea - thoughts?
  134. Vintage WE Tubes
  135. SE amplifier advice..
  136. Mineature Tubes
  137. MD SM 102b transformer spec's please
  138. Vintage Marconi radio
  139. second order harmonics
  140. Hybrid amplifier
  141. Input caps for Motorola Console Amps
  142. to much gain
  143. Question - Type 19 tube
  144. alternative for footswitch??
  145. Noob. Help PP EL34 / EF86 both as triode schem.
  146. RH84 SE, pentode driver... advice please
  147. Having an issue with a MOSFET in my Blue Hawaii
  148. Info wanted on OPT....
  149. 6P43P Strange Plate Graphs
  150. Multiple Phono preamp
  151. pas filament supply
  152. HV on high voltage amps
  153. Lageschaar hybrid-connection PSE-KT66
  154. First DIY from scratch
  155. Ballance resistors
  156. casing about SOHA I headphone amp
  157. Any interest in 56 various tubes?
  158. Help with exploding tubes!
  159. My new filiment PS for Push Pull GM70
  160. So what exactly do I have here? Heathcraft EA-2
  161. first experience with retro electronics
  162. Revising a tube pre-amp: can't find parts?
  163. Info for Pioneer SA-810 tube amp
  164. Has anyone tried tx2575 in cathode resistor?
  165. 12JZ8
  166. Is it OK to drill mounting holes in transformer laminations?
  167. Seeking Sescom Transformer Specs
  168. Calibrating a Sencor ??
  169. Capacitor in parallel with negative feedback resistor
  170. Old electronics repair store closing. Hartford. FYI. Not related
  171. CL ad for tubes in MA. FYI only. Not connected
  172. Distortion in amp after warm up
  173. Re-bias when changing from Triod to Pentode
  174. Yaqin MC-10L - Electricity in volume knob
  175. Newbie question about a 300B amplifier
  176. Modified Wavebourn Tower II ?
  177. Elevated Heater Voltages - 40v?
  178. Free Tubes!
  179. found tube i like, only small bits of red letter,what tube brands used red lettering?
  180. Impedance problem Of O/P Transformer
  181. Runaway tubes or tubes drawing excess current--baffling
  182. croft SD3 CROFT PREAMP
  183. valve phono stage on a budget
  184. Dynaco vs. Dynaclone
  185. Amplifier Problem - Need help!
  186. Idea for a 6n1p preamp
  187. K & K Audio Two Terminal Constant Current Source
  188. Counterpoint SA-12 wackyness
  189. Shuguang SG-50
  190. manley EQP-1A Tube EQ
  191. El34 PP advice needed
  192. Fosgate Punch 800 a4, diagram needed
  193. Power Transfomer For Valve Amp Question
  194. a 'simpler' tube/valve mixer topology
  195. Qustions about centre speaker connection
  196. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  197. 0d3 for el84 screen regulator
  198. Edcor XPWR059 power problem
  199. Did bootstrapping pot change it's operation
  200. Transformer wiring (Need Help)
  201. Class-d Hybrid
  202. New test data comparing different 7591's
  203. ZKIT2 Zen Triode mono SET amplifier kit
  204. Tango 11146 Output Transformers ?
  205. KT120 Tube
  206. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  207. Mu follower
  208. Aronov LS9100 - any info ???
  209. Tube Preamp Dock
  210. Grounded grid Zout
  211. HY69 in triode mode...some experience ?
  212. Bleeder Resistor (Need Help)
  213. use of 12ax7 and 6v6 as 6T9 alternative?
  214. Positive feedback for amplifier input stage
  215. Rusted OT Issue?
  216. Multiple filament windings
  217. need help with frist tube amp
  218. Testing Western Electric 437a with TV-7D/U ?
  219. Graaf 5050
  220. finished breadboard project
  221. How Much is Too Much Filtering?
  222. 2a3 - for car use?
  223. troubleshooting a Mingda MC34AB
  224. How to repair and refurbish vintage tube amps?
  225. How to repair and refurbish vintage tube amps?
  226. NYAL OTL3 Amps
  227. 6DJ8/6922 rolling... any general consensus on these?
  228. Mullard 12AU7 tests bad when running grid leakage test?
  229. Can you identify this AMP??
  230. effects of different HT voltage
  231. Substituting a 12AX7 for a 12DW7
  232. what to do with 1uF???
  233. Correct power rating for Chicago OT - opinions
  234. Need help with Stancor 1.5 K OPT Tran.
  235. S5 K8-LM mono KIT (total newbie)
  236. Pentode section of 6M11
  237. Looking for goodme proven 2A3 SE project
  238. Music Angel MENG Series EL34 Push Pull Tube Integrated Amp
  239. Tube replacement causes bias problems.
  240. Spectra of tube glow: any data?
  241. Plate Characteristics for 6158 dual triode
  242. Center tap or not...
  243. Connecting G3 to a negative supply on a pentode
  244. Dynaco FM-3 Curcuit Boards
  245. Sonic Frontiers Line 2 schematic
  246. Philips Hi Z radio amp
  247. Need help modifying tube bias circuit
  248. filament transformer current rating
  249. SE OT power tube suggestions please!
  250. What is up with this wave form?

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