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  1. A quick question about NFB
  2. PAS3 - are the tone controls really *that* bad?
  3. PP OPT in SE mode operation?
  4. Cheap 6n6p double ended push-pull idea - thoughts?
  5. Vintage WE Tubes
  6. SE amplifier advice..
  7. Mineature Tubes
  8. MD SM 102b transformer spec's please
  9. Vintage Marconi radio
  10. second order harmonics
  11. Hybrid amplifier
  12. Input caps for Motorola Console Amps
  13. to much gain
  14. Question - Type 19 tube
  15. alternative for footswitch??
  16. Noob. Help PP EL34 / EF86 both as triode schem.
  17. Yet another LA-2A
  18. RH84 SE, pentode driver... advice please
  19. Having an issue with a MOSFET in my Blue Hawaii
  20. Info wanted on OPT....
  21. 6P43P Strange Plate Graphs
  22. Multiple Phono preamp
  23. pas filament supply
  24. HV on high voltage amps
  25. Lageschaar hybrid-connection PSE-KT66
  26. First DIY from scratch
  27. Ballance resistors
  28. casing about SOHA I headphone amp
  29. Any interest in 56 various tubes?
  30. Help with exploding tubes!
  31. My new filiment PS for Push Pull GM70
  32. So what exactly do I have here? Heathcraft EA-2
  33. Please help identify this Amveco toroidal transformer.
  34. first experience with retro electronics
  35. Revising a tube pre-amp: can't find parts?
  36. Info for Pioneer SA-810 tube amp
  37. Has anyone tried tx2575 in cathode resistor?
  38. 12JZ8
  39. Is it OK to drill mounting holes in transformer laminations?
  40. Seeking Sescom Transformer Specs
  41. Calibrating a Sencor ??
  42. Capacitor in parallel with negative feedback resistor
  43. Old electronics repair store closing. Hartford. FYI. Not related
  44. CL ad for tubes in MA. FYI only. Not connected
  45. Distortion in amp after warm up
  46. Re-bias when changing from Triod to Pentode
  47. Yaqin MC-10L - Electricity in volume knob
  48. Newbie question about a 300B amplifier
  49. Modified Wavebourn Tower II ?
  50. Elevated Heater Voltages - 40v?
  51. Free Tubes!
  52. found tube i like, only small bits of red letter,what tube brands used red lettering?
  53. Impedance problem Of O/P Transformer
  54. Runaway tubes or tubes drawing excess current--baffling
  55. croft SD3 CROFT PREAMP
  56. valve phono stage on a budget
  57. Dynaco vs. Dynaclone
  58. Amplifier Problem - Need help!
  59. Idea for a 6n1p preamp
  60. K & K Audio Two Terminal Constant Current Source
  61. 6550 Push Pull noise in power stage
  62. 6P1P-EV PP guitar amp tryout.
  63. question about output transformer for guitar amp
  64. Counterpoint SA-12 wackyness
  65. Shuguang SG-50
  66. manley EQP-1A Tube EQ
  67. El34 PP advice needed
  68. Fosgate Punch 800 a4, diagram needed
  69. Power Transfomer For Valve Amp Question
  70. a 'simpler' tube/valve mixer topology
  71. Qustions about centre speaker connection
  72. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  73. 0d3 for el84 screen regulator
  74. Edcor XPWR059 power problem
  75. Did bootstrapping pot change it's operation
  76. Transformer wiring (Need Help)
  77. Class-d Hybrid
  78. New test data comparing different 7591's
  79. Eico 666 Tube Tester Freaks Out When Testing Rectifier Tubes
  80. ZKIT2 Zen Triode mono SET amplifier kit
  81. Tango 11146 Output Transformers ?
  82. KT120 Tube
  83. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  84. Mu follower
  85. Aronov LS9100 - any info ???
  86. Tube Preamp Dock
  87. Substituting potentiometers
  88. Grounded grid Zout
  89. HY69 in triode mode...some experience ?
  90. ITA LA 1B SCHEMATICS????
  91. Thoughts on PSU
  92. Bleeder Resistor (Need Help)
  93. use of 12ax7 and 6v6 as 6T9 alternative?
  94. Do I want fast settling or massive filtration in PS?
  95. Positive feedback for amplifier input stage
  96. Rusted OT Issue?
  97. Multiple filament windings
  98. need help with frist tube amp
  99. Testing Western Electric 437a with TV-7D/U ?
  100. Graaf 5050
  101. finished breadboard project
  102. How Much is Too Much Filtering?
  103. 2a3 - for car use?
  104. troubleshooting a Mingda MC34AB
  105. How to repair and refurbish vintage tube amps?
  106. How to repair and refurbish vintage tube amps?
  107. NYAL OTL3 Amps
  108. 6DJ8/6922 rolling... any general consensus on these?
  109. Mullard 12AU7 tests bad when running grid leakage test?
  110. Can you identify this AMP??
  111. effects of different HT voltage
  112. Substituting a 12AX7 for a 12DW7
  113. what to do with 1uF???
  114. Correct power rating for Chicago OT - opinions
  115. Need help with Stancor 1.5 K OPT Tran.
  116. S5 K8-LM mono KIT (total newbie)
  117. Pentode section of 6M11
  118. Looking for goodme proven 2A3 SE project
  119. Music Angel MENG Series EL34 Push Pull Tube Integrated Amp
  120. Tube replacement causes bias problems.
  121. Spectra of tube glow: any data?
  122. Plate Characteristics for 6158 dual triode
  123. Center tap or not...
  124. Connecting G3 to a negative supply on a pentode
  125. Dynaco FM-3 Curcuit Boards
  126. Sonic Frontiers Line 2 schematic
  127. Philips Hi Z radio amp
  128. Need help modifying tube bias circuit
  129. filament transformer current rating
  130. SE OT power tube suggestions please!
  131. What is up with this wave form?
  132. Volume Controls
  133. Help identifying driver stage
  134. Tube mixing console
  135. Uses for Cheapo 6CB5
  136. Twin DN2540 in TubelabSE?
  137. Bias or loss of power in one channel problem
  138. Drilling a hole in a Tube :)
  139. Tube stage placement in a mongrel (hybrid) amp
  140. Tubelab Single Ended
  141. Quad KT88 driver
  142. Single Ended Output Transformer
  143. SE P-P guitar amp.
  144. 300B with interstage
  145. Problem with Aria (Meng) Mini 6p1 (glowing plate)
  146. possible to filter dips in AC line?
  147. Weston Ammeter Headphone Amp Prototype
  148. What is the fault with this amp?
  149. k-12G turret board version
  150. low voltage "high gain" amp
  151. Wanted: ELNA Cerafine 10000uf 63v New or used
  152. Connect ipod/laptop to old 1950's radio
  153. Percieved Power outputs Tube vs Solid State
  154. (Weston Ammeter Headphone Amp Redux ?)
  155. Tube guitar amp for acoustic guitar?
  156. Would it be possible to drive a 300b with new power jfets?
  157. Would it be possible to drive a 300b with new power jfets?
  158. Will KT88 increase output power in Copland CTA-402
  159. Music Angel XD-SE EL34 intermittent thump
  160. OPT with cathode feedback
  161. Rebuilding fisher sa-1000
  162. Little Dot Mk IV SE
  163. EF86 on HICKOK 752a tester..??
  164. Choke power supplies and bypassing.
  165. Load resistor on OPT
  166. Ultimate Octal
  167. Help needed for 6H30 output schematic for DAC
  168. KT88 doubt
  169. Leave it on or turn it off?
  170. 6y6 output tube and Fender Champ(ion)
  171. Did I do this loadline correctly
  172. Masco MA-35 rebuild
  173. Motorola SE console amp blown fuse
  174. What to do with Telefunken parts?
  175. OT as buffer?
  176. Single ended EL84 Schematic
  177. Pattern for power xmfr magnetic leaking ?
  178. heater voltage
  179. Small Speakers for 5 channel single ended amp
  180. missing circuit components- why?
  181. valve rectifier series resistors
  182. What to do with a 6N14P/ECC84
  183. Info for very rare neon tubes?
  184. Fender 5F1 Champ clone with triode mode
  185. UL for EL84. 22-24% is better than the dogma....40% is lowest distortion....
  186. Jan Tube question
  187. 60 watt tubeamp with Low B+
  188. What types of SET rock the hardest?
  189. UTC A16 interstage 300B
  190. 6C33
  191. Need wiring schematic for Conn 6050 amp
  192. 6N6P at very low voltage
  193. Transformer Swap
  194. Need help building a tube linestage for my gainclone
  195. Ping SY: His Master's Noise
  196. Wollensak SE 7591 parts projects?
  197. 807 screen voltage help
  198. My little 801A power amplifier
  199. Help needed finding a small DPST switch - confused!
  200. Help with bias pot- wont adjust!
  201. 6N6P / ECC99 / E182CC
  202. bias question
  203. Really low parts could el84 pp design for a beginner?
  204. moviola tubes -- other names?
  205. DHT with TDA1541A in a NOS DAC?
  206. 6C33C-B Tube Tester
  207. VT100mk2 - Retubing
  208. Parallel 6L6 se iron suggestion.
  209. 6N2 Tube Srpp Drive Stage
  210. Unexpectedly good EL84 amp
  211. Kypo Electronic - Buffer, Preamp & Amp kits
  212. PSU bypass cap type
  213. Yaqin MC10-T
  214. Yaqin MC10-L Need help collating data
  215. Wanted: High Quality Complete tube NOS DAC with TDA1541A
  216. 6360 or 6939 as a phase inverter
  217. Peerless 16687 & 7142 Transformer Identification
  218. Wanted: High Quality DIY Tube NOS DAC with TDA1541A
  219. Restoration of leak stereo 20: advice pls
  220. DC Tube Heaters
  221. Musical Paradise MP-428 300B Amplifier
  222. Tube regulator
  223. Why overvoltage on HT?
  224. 50c5 schematic question
  225. Me again... matrix decoding w/ tubes?
  226. chapman 305 transformer wiring
  227. tube rolling el34 need advice
  228. Adding resistance to OT circuit.
  229. Tube pre-amp + Class-D amp. any experience?
  230. Bias using a ccs as an anode load
  231. Magnepan High Frequency Tube Amp
  232. Home-Made Plate Curves
  233. Vacuum Tube Audio PH-11
  234. Latest project SRPP valve front end with class D MOSFET output stage.
  235. Melos 400 restoration project - need help (unaltered reference needed)
  236. Comparison of Sovtek 5751 and RCA 5751
  237. Replacing electrolytic caps
  238. Heater supply for the 866a
  239. How good is good enough when designing a line stage?
  240. Cathode/plate resistors ??
  241. Tubes and LTspice?
  242. Is this an oscillation problem? -broskie CCA linestage
  243. Simple Octal SET help.
  244. Capacitor Sanity Check
  245. VTVM substitute?
  246. Caps - Mundorf Silver/oil vs silver/gold/oil
  247. What music/sound style for 845 tubes?
  248. Advice Needed
  249. Favorite ouput tube (SE only)
  250. Best make of audio valves/tubes

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