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  1. Reducing Filment Hum in Tubes
  2. push pull power amp
  3. 6 ohm speakers....
  4. Need a 12.6 VDC power supply schematic
  5. Gold Lion KT88 Issue
  6. Plate currents in P-P
  7. Testing amplifiers with computer software...
  8. Welborn Labs - Abysmal Service
  9. Repairing broken pins on valuable tube...
  10. Explain how feedback affects DF?
  11. Low emissions
  12. Tube Blue Glow question
  13. Common-mode choke before or after?
  14. 6l6 data sheet question
  15. Physical Tube Diagnosis?
  16. how and why power amps clip
  17. Vacuum Tube OTL power amp!!
  18. Tube replacement options.....
  19. balanced RIAA amp
  20. power amp distortion
  21. Suggestions for 5k5 40W iron?
  22. Schematic Tube Analog Output Stage???
  23. 300B 'direct drive' using a 6U8..
  24. Magnavox 88-02 power trans ratings?
  25. Preamp with humming noise!
  26. How to choose line out transformer?
  27. Tools for Cutting Tube Socket Holes?
  28. Switchable SE.
  29. GZ33 in place of 5U4 can it be done?
  30. phase splitter issue
  31. Armstrong A10 MK2 EL34 mono block
  32. "Ug" The Transformer
  33. i think its time i start playing with caps
  34. problems with preamp on home brew
  35. LS180 Tube Socket?
  36. simple question - 5V heater power supply
  37. Lineamp
  38. FI AUDİO 421 A
  39. Pete Millett has another Red Board for sale
  40. Jolida JD9 Problem
  41. 6N11 = 6N1P ?
  42. K12-G tube amp problem
  43. Please vote for one of the schematics.
  44. Advantages of separate PS for input and output stages
  45. Another PCB tube amp design
  46. Help. Replacement OPT sqrueeechhh.
  47. New concept of a power amp
  48. Lundahl and rectifier mismatch?
  49. Resurrecting weak tubes
  50. Best DHT heater?
  51. Help requested for EL84 SET amp
  52. What did I buy??
  53. Edcor and Custom Power Transformer Design
  54. What would you make with this power TX?
  55. Lundahl 1676
  56. DHT for 300B problem
  57. Newbie question about output transformer to speaker matching
  58. Red board add-on phono/RIAA pre-amp
  59. 2 Chassis amp
  60. Is It posible to bridge two quad II monoblocks?
  61. Power tube at work picture
  62. Tube SE power amp , which one??
  63. Hickok 539A issue
  64. Noise in one channel? Pioneer SX-400
  65. Hartung / Prestla OTL amps
  66. Lafayette Model 417
  67. Extreme plate load
  68. What do you think about this idea
  69. el84pse schem, need advice
  70. Video pentodes as outputs
  71. Chinese "Audio Research" KT88s
  72. New 6C33 Socket
  73. 2a3 PP output transformer
  74. PSU problem - Murphy is an ***hole!
  75. Best SET design?
  76. Anybody ever tried EBC41 as 12AX7 substitute?
  77. The 7242
  78. 12bh7a
  79. Phase Splitter Help
  80. Oscilloscope Question
  81. sizing opt
  82. 6P3C-E Datasheet help
  83. on the toroids again
  84. OPT problem or Something else 6L6 PP
  85. Look what I found!
  86. Help, Diy tube amp
  87. Idea
  88. a few DIY tube amplifier setups
  89. 6L6 PP amp motorboating
  90. Mayer-inspired 4P1L
  91. 6L6 WGB 2X34W STEREO AMPL
  92. Isolation transformation wiring project help
  93. Tube Amp DIY or Retail
  94. Supplier for GU50 tubes
  95. 2E26's
  96. Encel Stereophonic M.F.B CSM 40 amplifier
  97. Mono 300B SE Amplifier
  98. Broken tubes for 3D Modelling
  99. Loud hum in one channel
  100. 6EM7 PP question
  101. 12AU7/IRF610 Hybrid Amplifier
  102. 12AU7/IRF610 Hybrid Amplifier
  103. RIAA preamplifier
  104. Classic amp, Chinese or scratch-build for Quad ESL?
  105. CLASS A TUBE AMPLIFIER FOR TWEETER
  106. How to gap output transformers?
  107. Cathode bypasses - partial bypass and combination bias
  108. Phase splitter
  109. YS Audio balanced Preamp
  110. Low voltage 12AU7 (19J6) -- re "starving"
  111. phase splitter
  112. Music Angel Meng 6P1
  113. Is it possible to dampen a partially microphonic 12ax7?
  114. Pioneer SA-810 tube amp.
  115. 6C33 D.C.M.B. - Paging Ari Polisois
  116. Whose is this logo?
  117. What is grid resistance of 807/6l6 in pentode
  118. PAS Upgrade Boards by Epperson
  119. Bang and Olufsen 609k stereo se el84 fm tuner
  120. Finished EL34 tube amp... but oscilates weird..
  121. Scope Trace
  122. Drifty tubes
  123. Choosing plate voltage
  124. Determining Zout for SRPP
  125. PX25 amplifier - thoughts?
  126. Testing Ck5703 tubes
  127. When can screen voltage be higher than plate???
  128. 31AL10's
  129. Lafayette TE-50 Tube Tester
  130. Acoustic (not Audio) Alchemy - I need a wizzard
  131. current feedback
  132. dac with tube buffer/preamp
  133. Sowter 3607
  134. Back to Loftin-White
  135. What to build? (I have a lot of parts)
  136. Grounding chassis through RCA
  137. K40Y-9: Questions And Comments
  138. buffer line stage schematic
  139. Dual triode Thanks for the pre-attenuation link
  140. Help With Alps Volume Pot Noise
  141. 6AM4 driving 45???
  142. Franks 6sn7 line stage question
  143. Edcor power tx XPWR035 issue
  144. Recommend me a schematic for El34 or KT88 ?
  145. RH84 Power supply
  146. Pentode driving a SE triode? any experience?
  147. Big tubes thread
  148. Meng Yayi KT88 MonoBlock
  149. Old Dumont Console - Story and Questions
  150. Newbie GlassWare Aikido All in One Questios
  151. Building my 1st tube amp
  152. A good tube for my SE 5K-8 OPT's
  153. 6c33 - ready, SET, GO
  154. Noisy tube rectifier goes quiet when i put my hand NEAR it
  155. Strange ancient looking tube amp
  156. Vintage Dynaco vs. Triode Electronics
  157. LINE PRE - 6N9S - 6dB
  158. Can I balance a diff stage like this?
  159. Ways to design for low IM distortion
  160. Genalex KT88 Plate Dissipation Question
  161. difference between SE and PP transformer
  162. I put a bad ouput tube in my amp, did I hurt it?
  163. Stereo amplifyer project
  164. 6sl7 6sl7 dynaco driver board
  165. PCB for stand alone 5W SE
  166. Triode VS. UL bias
  167. How to test a DIY amp?
  168. Morgan Jones 4th ed
  169. How close is too close when designing an amp
  170. Fatman I tube Problem
  171. 807 p-p tube amp schematic
  172. TUBELAB SIMPLE SE
  173. Listen to 6DJ8 Triode through Power Chip IC. Easy project.
  174. Cheap motor caps(MKP) vs Electrolitics
  175. James O/P Tx
  176. Ripple reduction with added voltage compensation to HV
  177. SEVETLANA "SV" 6550 C vs 6550 C
  178. Frank's 6SN7 - plate follower, noise
  179. Help running RH807 at higher voltage
  180. Preamp hum issues
  181. EML mesh plate 2a3 in DRD amp
  182. How to run RH807 at 400V?
  183. Preamp Umbilical - Use Shield as Ground Lead?
  184. Automatic Bias Control sliding bias
  185. Edcor Output Transformer Resistance
  186. Would this be worthwile restoring?
  187. Historic Tube Amplifiers
  188. 6HF5 testing
  189. A quick question about NFB
  190. PAS3 - are the tone controls really *that* bad?
  191. PP OPT in SE mode operation?
  192. Cheap 6n6p double ended push-pull idea - thoughts?
  193. Vintage WE Tubes
  194. SE amplifier advice..
  195. Mineature Tubes
  196. MD SM 102b transformer spec's please
  197. Vintage Marconi radio
  198. second order harmonics
  199. Hybrid amplifier
  200. Input caps for Motorola Console Amps
  201. to much gain
  202. Question - Type 19 tube
  203. alternative for footswitch??
  204. Noob. Help PP EL34 / EF86 both as triode schem.
  205. Yet another LA-2A
  206. RH84 SE, pentode driver... advice please
  207. Having an issue with a MOSFET in my Blue Hawaii
  208. Info wanted on OPT....
  209. 6P43P Strange Plate Graphs
  210. Multiple Phono preamp
  211. pas filament supply
  212. HV on high voltage amps
  213. Lageschaar hybrid-connection PSE-KT66
  214. First DIY from scratch
  215. Ballance resistors
  216. casing about SOHA I headphone amp
  217. Any interest in 56 various tubes?
  218. Help with exploding tubes!
  219. My new filiment PS for Push Pull GM70
  220. So what exactly do I have here? Heathcraft EA-2
  221. Please help identify this Amveco toroidal transformer.
  222. first experience with retro electronics
  223. Revising a tube pre-amp: can't find parts?
  224. Info for Pioneer SA-810 tube amp
  225. Has anyone tried tx2575 in cathode resistor?
  226. 12JZ8
  227. Is it OK to drill mounting holes in transformer laminations?
  228. Seeking Sescom Transformer Specs
  229. Calibrating a Sencor ??
  230. Capacitor in parallel with negative feedback resistor
  231. Old electronics repair store closing. Hartford. FYI. Not related
  232. CL ad for tubes in MA. FYI only. Not connected
  233. Distortion in amp after warm up
  234. Re-bias when changing from Triod to Pentode
  235. Yaqin MC-10L - Electricity in volume knob
  236. Newbie question about a 300B amplifier
  237. Modified Wavebourn Tower II ?
  238. Elevated Heater Voltages - 40v?
  239. Free Tubes!
  240. found tube i like, only small bits of red letter,what tube brands used red lettering?
  241. Impedance problem Of O/P Transformer
  242. Runaway tubes or tubes drawing excess current--baffling
  243. croft SD3 CROFT PREAMP
  244. valve phono stage on a budget
  245. Dynaco vs. Dynaclone
  246. Amplifier Problem - Need help!
  247. Idea for a 6n1p preamp
  248. K & K Audio Two Terminal Constant Current Source
  249. 6550 Push Pull noise in power stage
  250. 6P1P-EV PP guitar amp tryout.

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