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  1. CL ad for tubes in MA. FYI only. Not connected
  2. Distortion in amp after warm up
  3. Re-bias when changing from Triod to Pentode
  4. Yaqin MC-10L - Electricity in volume knob
  5. Newbie question about a 300B amplifier
  6. Modified Wavebourn Tower II ?
  7. Elevated Heater Voltages - 40v?
  8. Free Tubes!
  9. found tube i like, only small bits of red letter,what tube brands used red lettering?
  10. Impedance problem Of O/P Transformer
  11. Runaway tubes or tubes drawing excess current--baffling
  12. croft SD3 CROFT PREAMP
  13. valve phono stage on a budget
  14. Dynaco vs. Dynaclone
  15. Amplifier Problem - Need help!
  16. Idea for a 6n1p preamp
  17. K & K Audio Two Terminal Constant Current Source
  18. 6550 Push Pull noise in power stage
  19. 6P1P-EV PP guitar amp tryout.
  20. question about output transformer for guitar amp
  21. Hammond B3 tech help needed. Distortion only on certain notes/drawbar frequencies.
  22. Counterpoint SA-12 wackyness
  23. Shuguang SG-50
  24. manley EQP-1A Tube EQ
  25. El34 PP advice needed
  26. Fosgate Punch 800 a4, diagram needed
  27. Power Transfomer For Valve Amp Question
  28. a 'simpler' tube/valve mixer topology
  29. Qustions about centre speaker connection
  30. Using Seperate Preamp to Drive S-5 Electronics K-16LS Integrated Amp?
  31. 0d3 for el84 screen regulator
  32. Edcor XPWR059 power problem
  33. Did bootstrapping pot change it's operation
  34. Transformer wiring (Need Help)
  35. Class-d Hybrid
  36. New test data comparing different 7591's
  37. Eico 666 Tube Tester Freaks Out When Testing Rectifier Tubes
  38. ZKIT2 Zen Triode mono SET amplifier kit
  39. Tango 11146 Output Transformers ?
  40. KT120 Tube
  41. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  42. Mu follower
  43. Aronov LS9100 - any info ???
  44. Tube Preamp Dock
  45. Substituting potentiometers
  46. Grounded grid Zout
  47. HY69 in triode mode...some experience ?
  48. ITA LA 1B SCHEMATICS????
  49. Thoughts on PSU
  50. Bleeder Resistor (Need Help)
  51. use of 12ax7 and 6v6 as 6T9 alternative?
  52. Do I want fast settling or massive filtration in PS?
  53. Positive feedback for amplifier input stage
  54. Rusted OT Issue?
  55. Multiple filament windings
  56. need help with frist tube amp
  57. Testing Western Electric 437a with TV-7D/U ?
  58. Graaf 5050
  59. finished breadboard project
  60. How Much is Too Much Filtering?
  61. 2a3 - for car use?
  62. troubleshooting a Mingda MC34AB
  63. How to repair and refurbish vintage tube amps?
  64. How to repair and refurbish vintage tube amps?
  65. NYAL OTL3 Amps
  66. 6DJ8/6922 rolling... any general consensus on these?
  67. Mullard 12AU7 tests bad when running grid leakage test?
  68. Can you identify this AMP??
  69. effects of different HT voltage
  70. Substituting a 12AX7 for a 12DW7
  71. what to do with 1uF???
  72. Correct power rating for Chicago OT - opinions
  73. Need help with Stancor 1.5 K OPT Tran.
  74. S5 K8-LM mono KIT (total newbie)
  75. Pentode section of 6M11
  76. Looking for goodme proven 2A3 SE project
  77. Music Angel MENG Series EL34 Push Pull Tube Integrated Amp
  78. Tube replacement causes bias problems.
  79. Spectra of tube glow: any data?
  80. Plate Characteristics for 6158 dual triode
  81. Center tap or not...
  82. Connecting G3 to a negative supply on a pentode
  83. Dynaco FM-3 Curcuit Boards
  84. Sonic Frontiers Line 2 schematic
  85. Philips Hi Z radio amp
  86. Need help modifying tube bias circuit
  87. filament transformer current rating
  88. SE OT power tube suggestions please!
  89. What is up with this wave form?
  90. Volume Controls
  91. Help identifying driver stage
  92. Tube mixing console
  93. Uses for Cheapo 6CB5
  94. Twin DN2540 in TubelabSE?
  95. Bias or loss of power in one channel problem
  96. Drilling a hole in a Tube :)
  97. Tube stage placement in a mongrel (hybrid) amp
  98. Tubelab Single Ended
  99. Quad KT88 driver
  100. Single Ended Output Transformer
  101. SE P-P guitar amp.
  102. 300B with interstage
  103. Problem with Aria (Meng) Mini 6p1 (glowing plate)
  104. possible to filter dips in AC line?
  105. Weston Ammeter Headphone Amp Prototype
  106. What is the fault with this amp?
  107. k-12G turret board version
  108. low voltage "high gain" amp
  109. Wanted: ELNA Cerafine 10000uf 63v New or used
  110. Connect ipod/laptop to old 1950's radio
  111. Percieved Power outputs Tube vs Solid State
  112. (Weston Ammeter Headphone Amp Redux ?)
  113. Tube guitar amp for acoustic guitar?
  114. Would it be possible to drive a 300b with new power jfets?
  115. Would it be possible to drive a 300b with new power jfets?
  116. Will KT88 increase output power in Copland CTA-402
  117. Music Angel XD-SE EL34 intermittent thump
  118. OPT with cathode feedback
  119. Rebuilding fisher sa-1000
  120. Little Dot Mk IV SE
  121. EF86 on HICKOK 752a tester..??
  122. Choke power supplies and bypassing.
  123. Load resistor on OPT
  124. Ultimate Octal
  125. Help needed for 6H30 output schematic for DAC
  126. KT88 doubt
  127. Leave it on or turn it off?
  128. 6y6 output tube and Fender Champ(ion)
  129. Did I do this loadline correctly
  130. Masco MA-35 rebuild
  131. Motorola SE console amp blown fuse
  132. What to do with Telefunken parts?
  133. OT as buffer?
  134. Single ended EL84 Schematic
  135. Pattern for power xmfr magnetic leaking ?
  136. heater voltage
  137. Small Speakers for 5 channel single ended amp
  138. missing circuit components- why?
  139. valve rectifier series resistors
  140. What to do with a 6N14P/ECC84
  141. Info for very rare neon tubes?
  142. Fender 5F1 Champ clone with triode mode
  143. UL for EL84. 22-24% is better than the dogma....40% is lowest distortion....
  144. Jan Tube question
  145. 60 watt tubeamp with Low B+
  146. What types of SET rock the hardest?
  147. UTC A16 interstage 300B
  148. 6C33
  149. Need wiring schematic for Conn 6050 amp
  150. 6N6P at very low voltage
  151. Transformer Swap
  152. Need help building a tube linestage for my gainclone
  153. Ping SY: His Master's Noise
  154. Wollensak SE 7591 parts projects?
  155. 807 screen voltage help
  156. My little 801A power amplifier
  157. Help needed finding a small DPST switch - confused!
  158. Help with bias pot- wont adjust!
  159. 6N6P / ECC99 / E182CC
  160. bias question
  161. Really low parts could el84 pp design for a beginner?
  162. moviola tubes -- other names?
  163. DHT with TDA1541A in a NOS DAC?
  164. 6C33C-B Tube Tester
  165. VT100mk2 - Retubing
  166. Parallel 6L6 se iron suggestion.
  167. 6N2 Tube Srpp Drive Stage
  168. Unexpectedly good EL84 amp
  169. Kypo Electronic - Buffer, Preamp & Amp kits
  170. PSU bypass cap type
  171. Yaqin MC10-T
  172. Yaqin MC10-L Need help collating data
  173. Wanted: High Quality Complete tube NOS DAC with TDA1541A
  174. 6360 or 6939 as a phase inverter
  175. Peerless 16687 & 7142 Transformer Identification
  176. Wanted: High Quality DIY Tube NOS DAC with TDA1541A
  177. Restoration of leak stereo 20: advice pls
  178. DC Tube Heaters
  179. Musical Paradise MP-428 300B Amplifier
  180. Tube regulator
  181. Why overvoltage on HT?
  182. 50c5 schematic question
  183. Me again... matrix decoding w/ tubes?
  184. chapman 305 transformer wiring
  185. tube rolling el34 need advice
  186. Adding resistance to OT circuit.
  187. Tube pre-amp + Class-D amp. any experience?
  188. Bias using a ccs as an anode load
  189. Magnepan High Frequency Tube Amp
  190. Home-Made Plate Curves
  191. Vacuum Tube Audio PH-11
  192. Latest project SRPP valve front end with class D MOSFET output stage.
  193. Melos 400 restoration project - need help (unaltered reference needed)
  194. Comparison of Sovtek 5751 and RCA 5751
  195. Replacing electrolytic caps
  196. Heater supply for the 866a
  197. How good is good enough when designing a line stage?
  198. Cathode/plate resistors ??
  199. Tubes and LTspice?
  200. Is this an oscillation problem? -broskie CCA linestage
  201. Simple Octal SET help.
  202. Capacitor Sanity Check
  203. VTVM substitute?
  204. Caps - Mundorf Silver/oil vs silver/gold/oil
  205. What music/sound style for 845 tubes?
  206. Advice Needed
  207. Favorite ouput tube (SE only)
  208. Best make of audio valves/tubes
  209. How to calculate source impedance for audio transformer?
  210. Schematic for REDDi DI-Box?
  211. what the best kit for Dynaco
  212. That mystery trem cap
  213. A Hot Rodded Bottlehead S.E.X. Amplifier
  214. Cheap Chinese amps
  215. Wanted: Leak ST-50 Mains transformer 240V
  216. Eico HF-20 to bass guitar amp
  217. Ampeg B-18 issue/debug
  218. Who makes their own OPT around here?
  219. 71A
  220. Sound quality chinese tube amplifiers
  221. freeware circuit simulator for Osx (Mac)
  222. 12ax7LP substitute
  223. RH84 SE Build and custom Edcor power transformer
  224. 6l6 se primary impedance choice
  225. Luxman SQ38FD mkII, schematic
  226. 6c33 SET (my next project). Need some feedback
  227. Amorphous iron UMCCC-125: what would you do from it?
  228. Old Fisher SA-300 Amp help!
  229. What kind of sound does a noisy 12B4 make ??
  230. KT88 bias current keeps drifting
  231. Oddball Tube - Useful for Audio??
  232. 12AX7 dual triode "Signal Enhancer/Conditioner"
  233. 2nos of 6l6 in Parallel SE mode
  234. Output transformer selection
  235. 5C8S rectifier psud2 modle/rectifier information
  236. EF80 / KT77 SIngle Ended
  237. Longevity of output tubes in triode vs pentode
  238. Fender champ circuit low output.
  239. ekco ui59 receiver
  240. simple heater question .....
  241. Different Differential Pairs
  242. Decware Zen SET (first project/90% finished)
  243. YL-1200 for audioamp
  244. 7984's
  245. Building First Preamp HELP
  246. Aikido All-In-One Octal B+ measurement.
  247. OPT PP for GU50 Triode ?
  248. Requesting input on preamp schematic
  249. Longer life 6CA7's for class A
  250. Organ split

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