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  1. Determining Zout for SRPP
  2. PX25 amplifier - thoughts?
  3. Testing Ck5703 tubes
  4. When can screen voltage be higher than plate???
  5. 31AL10's
  6. Lafayette TE-50 Tube Tester
  7. Acoustic (not Audio) Alchemy - I need a wizzard
  8. current feedback
  9. dac with tube buffer/preamp
  10. Sowter 3607
  11. Back to Loftin-White
  12. What to build? (I have a lot of parts)
  13. Grounding chassis through RCA
  14. K40Y-9: Questions And Comments
  15. buffer line stage schematic
  16. Dual triode Thanks for the pre-attenuation link
  17. Help With Alps Volume Pot Noise
  18. 6AM4 driving 45???
  19. Franks 6sn7 line stage question
  20. Recommend me a schematic for El34 or KT88 ?
  21. RH84 Power supply
  22. Pentode driving a SE triode? any experience?
  23. Big tubes thread
  24. Meng Yayi KT88 MonoBlock
  25. Old Dumont Console - Story and Questions
  26. Newbie GlassWare Aikido All in One Questios
  27. Building my 1st tube amp
  28. A good tube for my SE 5K-8 OPT's
  29. 6c33 - ready, SET, GO
  30. Noisy tube rectifier goes quiet when i put my hand NEAR it
  31. Strange ancient looking tube amp
  32. Vintage Dynaco vs. Triode Electronics
  33. LINE PRE - 6N9S - 6dB
  34. Can I balance a diff stage like this?
  35. Ways to design for low IM distortion
  36. Genalex KT88 Plate Dissipation Question
  37. difference between SE and PP transformer
  38. I put a bad ouput tube in my amp, did I hurt it?
  39. Stereo amplifyer project
  40. 6sl7 6sl7 dynaco driver board
  41. PCB for stand alone 5W SE
  42. Triode VS. UL bias
  43. How to test a DIY amp?
  44. Morgan Jones 4th ed
  45. How close is too close when designing an amp
  46. Fatman I tube Problem
  47. 807 p-p tube amp schematic
  48. TUBELAB SIMPLE SE
  49. Listen to 6DJ8 Triode through Power Chip IC. Easy project.
  50. James O/P Tx
  51. Ripple reduction with added voltage compensation to HV
  52. SEVETLANA "SV" 6550 C vs 6550 C
  53. Frank's 6SN7 - plate follower, noise
  54. Help running RH807 at higher voltage
  55. Preamp hum issues
  56. EML mesh plate 2a3 in DRD amp
  57. How to run RH807 at 400V?
  58. Preamp Umbilical - Use Shield as Ground Lead?
  59. Automatic Bias Control sliding bias
  60. Edcor Output Transformer Resistance
  61. Would this be worthwile restoring?
  62. Historic Tube Amplifiers
  63. 6HF5 testing
  64. A quick question about NFB
  65. PAS3 - are the tone controls really *that* bad?
  66. PP OPT in SE mode operation?
  67. Cheap 6n6p double ended push-pull idea - thoughts?
  68. Vintage WE Tubes
  69. SE amplifier advice..
  70. Mineature Tubes
  71. MD SM 102b transformer spec's please
  72. Vintage Marconi radio
  73. second order harmonics
  74. Hybrid amplifier
  75. Input caps for Motorola Console Amps
  76. to much gain
  77. Question - Type 19 tube
  78. alternative for footswitch??
  79. Noob. Help PP EL34 / EF86 both as triode schem.
  80. RH84 SE, pentode driver... advice please
  81. Having an issue with a MOSFET in my Blue Hawaii
  82. Info wanted on OPT....
  83. 6P43P Strange Plate Graphs
  84. Multiple Phono preamp
  85. pas filament supply
  86. HV on high voltage amps
  87. Lageschaar hybrid-connection PSE-KT66
  88. First DIY from scratch
  89. Ballance resistors
  90. casing about SOHA I headphone amp
  91. Any interest in 56 various tubes?
  92. Help with exploding tubes!
  93. My new filiment PS for Push Pull GM70
  94. So what exactly do I have here? Heathcraft EA-2
  95. first experience with retro electronics
  96. Revising a tube pre-amp: can't find parts?
  97. Info for Pioneer SA-810 tube amp
  98. Has anyone tried tx2575 in cathode resistor?
  99. 12JZ8
  100. Is it OK to drill mounting holes in transformer laminations?
  101. Seeking Sescom Transformer Specs
  102. Calibrating a Sencor ??
  103. Capacitor in parallel with negative feedback resistor
  104. Old electronics repair store closing. Hartford. FYI. Not related
  105. CL ad for tubes in MA. FYI only. Not connected
  106. Distortion in amp after warm up
  107. Re-bias when changing from Triod to Pentode
  108. Yaqin MC-10L - Electricity in volume knob
  109. Newbie question about a 300B amplifier
  110. Modified Wavebourn Tower II ?
  111. Elevated Heater Voltages - 40v?
  112. Free Tubes!
  113. found tube i like, only small bits of red letter,what tube brands used red lettering?
  114. Impedance problem Of O/P Transformer
  115. Runaway tubes or tubes drawing excess current--baffling
  116. croft SD3 CROFT PREAMP
  117. valve phono stage on a budget
  118. Dynaco vs. Dynaclone
  119. Amplifier Problem - Need help!
  120. Idea for a 6n1p preamp
  121. K & K Audio Two Terminal Constant Current Source
  122. Counterpoint SA-12 wackyness
  123. Shuguang SG-50
  124. manley EQP-1A Tube EQ
  125. El34 PP advice needed
  126. Fosgate Punch 800 a4, diagram needed
  127. Power Transfomer For Valve Amp Question
  128. a 'simpler' tube/valve mixer topology
  129. Qustions about centre speaker connection
  130. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  131. 0d3 for el84 screen regulator
  132. Edcor XPWR059 power problem
  133. Did bootstrapping pot change it's operation
  134. Transformer wiring (Need Help)
  135. Class-d Hybrid
  136. New test data comparing different 7591's
  137. Eico 666 Tube Tester Freaks Out When Testing Rectifier Tubes
  138. ZKIT2 Zen Triode mono SET amplifier kit
  139. Tango 11146 Output Transformers ?
  140. KT120 Tube
  141. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  142. Mu follower
  143. Aronov LS9100 - any info ???
  144. Tube Preamp Dock
  145. Substituting potentiometers
  146. Grounded grid Zout
  147. HY69 in triode mode...some experience ?
  148. ITA LA 1B SCHEMATICS????
  149. Bleeder Resistor (Need Help)
  150. use of 12ax7 and 6v6 as 6T9 alternative?
  151. Positive feedback for amplifier input stage
  152. Rusted OT Issue?
  153. Multiple filament windings
  154. need help with frist tube amp
  155. Testing Western Electric 437a with TV-7D/U ?
  156. Graaf 5050
  157. finished breadboard project
  158. How Much is Too Much Filtering?
  159. 2a3 - for car use?
  160. troubleshooting a Mingda MC34AB
  161. How to repair and refurbish vintage tube amps?
  162. How to repair and refurbish vintage tube amps?
  163. NYAL OTL3 Amps
  164. 6DJ8/6922 rolling... any general consensus on these?
  165. Mullard 12AU7 tests bad when running grid leakage test?
  166. Can you identify this AMP??
  167. effects of different HT voltage
  168. Substituting a 12AX7 for a 12DW7
  169. what to do with 1uF???
  170. Correct power rating for Chicago OT - opinions
  171. Need help with Stancor 1.5 K OPT Tran.
  172. S5 K8-LM mono KIT (total newbie)
  173. Pentode section of 6M11
  174. Looking for goodme proven 2A3 SE project
  175. Music Angel MENG Series EL34 Push Pull Tube Integrated Amp
  176. Tube replacement causes bias problems.
  177. Spectra of tube glow: any data?
  178. Plate Characteristics for 6158 dual triode
  179. Center tap or not...
  180. Connecting G3 to a negative supply on a pentode
  181. Dynaco FM-3 Curcuit Boards
  182. Sonic Frontiers Line 2 schematic
  183. Philips Hi Z radio amp
  184. Need help modifying tube bias circuit
  185. filament transformer current rating
  186. SE OT power tube suggestions please!
  187. What is up with this wave form?
  188. Volume Controls
  189. Help identifying driver stage
  190. Uses for Cheapo 6CB5
  191. Twin DN2540 in TubelabSE?
  192. Bias or loss of power in one channel problem
  193. Drilling a hole in a Tube :)
  194. Tube stage placement in a mongrel (hybrid) amp
  195. Tubelab Single Ended
  196. Quad KT88 driver
  197. Single Ended Output Transformer
  198. 300B with interstage
  199. Problem with Aria (Meng) Mini 6p1 (glowing plate)
  200. possible to filter dips in AC line?
  201. Weston Ammeter Headphone Amp Prototype
  202. What is the fault with this amp?
  203. k-12G turret board version
  204. low voltage "high gain" amp
  205. Wanted: ELNA Cerafine 10000uf 63v New or used
  206. Connect ipod/laptop to old 1950's radio
  207. (Weston Ammeter Headphone Amp Redux ?)
  208. Would it be possible to drive a 300b with new power jfets?
  209. Would it be possible to drive a 300b with new power jfets?
  210. Will KT88 increase output power in Copland CTA-402
  211. Music Angel XD-SE EL34 intermittent thump
  212. OPT with cathode feedback
  213. Rebuilding fisher sa-1000
  214. Little Dot Mk IV SE
  215. EF86 on HICKOK 752a tester..??
  216. Choke power supplies and bypassing.
  217. Load resistor on OPT
  218. Ultimate Octal
  219. Help needed for 6H30 output schematic for DAC
  220. KT88 doubt
  221. Leave it on or turn it off?
  222. Did I do this loadline correctly
  223. Masco MA-35 rebuild
  224. Motorola SE console amp blown fuse
  225. What to do with Telefunken parts?
  226. OT as buffer?
  227. Single ended EL84 Schematic
  228. Pattern for power xmfr magnetic leaking ?
  229. heater voltage
  230. Small Speakers for 5 channel single ended amp
  231. missing circuit components- why?
  232. What to do with a 6N14P/ECC84
  233. Info for very rare neon tubes?
  234. UL for EL84. 22-24% is better than the dogma....40% is lowest distortion....
  235. Jan Tube question
  236. 60 watt tubeamp with Low B+
  237. What types of SET rock the hardest?
  238. UTC A16 interstage 300B
  239. 6C33
  240. Need wiring schematic for Conn 6050 amp
  241. 6N6P at very low voltage
  242. Transformer Swap
  243. Need help building a tube linestage for my gainclone
  244. Ping SY: His Master's Noise
  245. Wollensak SE 7591 parts projects?
  246. 807 screen voltage help
  247. My little 801A power amplifier
  248. Help needed finding a small DPST switch - confused!
  249. Help with bias pot- wont adjust!
  250. 6N6P / ECC99 / E182CC

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