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  1. Edcor XPWR059 power problem
  2. Did bootstrapping pot change it's operation
  3. Transformer wiring (Need Help)
  4. Class-d Hybrid
  5. New test data comparing different 7591's
  6. Eico 666 Tube Tester Freaks Out When Testing Rectifier Tubes
  7. ZKIT2 Zen Triode mono SET amplifier kit
  8. Tango 11146 Output Transformers ?
  9. KT120 Tube
  10. B&K Dyna-Quik 500 test socket 9A shows good tubes as Bad
  11. Mu follower
  12. Aronov LS9100 - any info ???
  13. Tube Preamp Dock
  14. Substituting potentiometers
  15. Grounded grid Zout
  16. HY69 in triode mode...some experience ?
  17. ITA LA 1B SCHEMATICS????
  18. Thoughts on PSU
  19. Bleeder Resistor (Need Help)
  20. use of 12ax7 and 6v6 as 6T9 alternative?
  21. Do I want fast settling or massive filtration in PS?
  22. Positive feedback for amplifier input stage
  23. Rusted OT Issue?
  24. Multiple filament windings
  25. need help with frist tube amp
  26. Testing Western Electric 437a with TV-7D/U ?
  27. Graaf 5050
  28. finished breadboard project
  29. How Much is Too Much Filtering?
  30. 2a3 - for car use?
  31. troubleshooting a Mingda MC34AB
  32. How to repair and refurbish vintage tube amps?
  33. How to repair and refurbish vintage tube amps?
  34. NYAL OTL3 Amps
  35. 6DJ8/6922 rolling... any general consensus on these?
  36. Mullard 12AU7 tests bad when running grid leakage test?
  37. Can you identify this AMP??
  38. effects of different HT voltage
  39. Substituting a 12AX7 for a 12DW7
  40. what to do with 1uF???
  41. Correct power rating for Chicago OT - opinions
  42. Need help with Stancor 1.5 K OPT Tran.
  43. S5 K8-LM mono KIT (total newbie)
  44. Pentode section of 6M11
  45. Looking for goodme proven 2A3 SE project
  46. Music Angel MENG Series EL34 Push Pull Tube Integrated Amp
  47. Tube replacement causes bias problems.
  48. Spectra of tube glow: any data?
  49. Plate Characteristics for 6158 dual triode
  50. Center tap or not...
  51. Connecting G3 to a negative supply on a pentode
  52. Dynaco FM-3 Curcuit Boards
  53. Sonic Frontiers Line 2 schematic
  54. Philips Hi Z radio amp
  55. Need help modifying tube bias circuit
  56. filament transformer current rating
  57. SE OT power tube suggestions please!
  58. What is up with this wave form?
  59. Volume Controls
  60. Help identifying driver stage
  61. Tube mixing console
  62. Uses for Cheapo 6CB5
  63. Twin DN2540 in TubelabSE?
  64. Bias or loss of power in one channel problem
  65. Drilling a hole in a Tube :)
  66. Tube stage placement in a mongrel (hybrid) amp
  67. Tubelab Single Ended
  68. Quad KT88 driver
  69. Single Ended Output Transformer
  70. SE P-P guitar amp.
  71. 300B with interstage
  72. Problem with Aria (Meng) Mini 6p1 (glowing plate)
  73. possible to filter dips in AC line?
  74. Weston Ammeter Headphone Amp Prototype
  75. What is the fault with this amp?
  76. k-12G turret board version
  77. low voltage "high gain" amp
  78. Wanted: ELNA Cerafine 10000uf 63v New or used
  79. Connect ipod/laptop to old 1950's radio
  80. Percieved Power outputs Tube vs Solid State
  81. (Weston Ammeter Headphone Amp Redux ?)
  82. Tube guitar amp for acoustic guitar?
  83. Would it be possible to drive a 300b with new power jfets?
  84. Would it be possible to drive a 300b with new power jfets?
  85. Will KT88 increase output power in Copland CTA-402
  86. Music Angel XD-SE EL34 intermittent thump
  87. OPT with cathode feedback
  88. Rebuilding fisher sa-1000
  89. Little Dot Mk IV SE
  90. EF86 on HICKOK 752a tester..??
  91. Choke power supplies and bypassing.
  92. Load resistor on OPT
  93. Ultimate Octal
  94. Help needed for 6H30 output schematic for DAC
  95. KT88 doubt
  96. Leave it on or turn it off?
  97. 6y6 output tube and Fender Champ(ion)
  98. Did I do this loadline correctly
  99. Masco MA-35 rebuild
  100. Motorola SE console amp blown fuse
  101. What to do with Telefunken parts?
  102. OT as buffer?
  103. Single ended EL84 Schematic
  104. Pattern for power xmfr magnetic leaking ?
  105. heater voltage
  106. Small Speakers for 5 channel single ended amp
  107. missing circuit components- why?
  108. valve rectifier series resistors
  109. What to do with a 6N14P/ECC84
  110. Info for very rare neon tubes?
  111. Fender 5F1 Champ clone with triode mode
  112. UL for EL84. 22-24% is better than the dogma....40% is lowest distortion....
  113. Jan Tube question
  114. 60 watt tubeamp with Low B+
  115. What types of SET rock the hardest?
  116. UTC A16 interstage 300B
  117. 6C33
  118. Need wiring schematic for Conn 6050 amp
  119. 6N6P at very low voltage
  120. Transformer Swap
  121. Need help building a tube linestage for my gainclone
  122. Ping SY: His Master's Noise
  123. Wollensak SE 7591 parts projects?
  124. 807 screen voltage help
  125. My little 801A power amplifier
  126. Help needed finding a small DPST switch - confused!
  127. Help with bias pot- wont adjust!
  128. 6N6P / ECC99 / E182CC
  129. bias question
  130. Really low parts could el84 pp design for a beginner?
  131. moviola tubes -- other names?
  132. DHT with TDA1541A in a NOS DAC?
  133. 6C33C-B Tube Tester
  134. VT100mk2 - Retubing
  135. Parallel 6L6 se iron suggestion.
  136. 6N2 Tube Srpp Drive Stage
  137. Unexpectedly good EL84 amp
  138. Kypo Electronic - Buffer, Preamp & Amp kits
  139. PSU bypass cap type
  140. Yaqin MC10-T
  141. Yaqin MC10-L Need help collating data
  142. Wanted: High Quality Complete tube NOS DAC with TDA1541A
  143. 6360 or 6939 as a phase inverter
  144. Peerless 16687 & 7142 Transformer Identification
  145. Wanted: High Quality DIY Tube NOS DAC with TDA1541A
  146. Restoration of leak stereo 20: advice pls
  147. DC Tube Heaters
  148. Musical Paradise MP-428 300B Amplifier
  149. Tube regulator
  150. Why overvoltage on HT?
  151. 50c5 schematic question
  152. Me again... matrix decoding w/ tubes?
  153. chapman 305 transformer wiring
  154. tube rolling el34 need advice
  155. Adding resistance to OT circuit.
  156. Tube pre-amp + Class-D amp. any experience?
  157. Bias using a ccs as an anode load
  158. Magnepan High Frequency Tube Amp
  159. Home-Made Plate Curves
  160. Vacuum Tube Audio PH-11
  161. Latest project SRPP valve front end with class D MOSFET output stage.
  162. Melos 400 restoration project - need help (unaltered reference needed)
  163. Comparison of Sovtek 5751 and RCA 5751
  164. Replacing electrolytic caps
  165. Heater supply for the 866a
  166. How good is good enough when designing a line stage?
  167. Cathode/plate resistors ??
  168. Tubes and LTspice?
  169. Is this an oscillation problem? -broskie CCA linestage
  170. Simple Octal SET help.
  171. Capacitor Sanity Check
  172. VTVM substitute?
  173. Caps - Mundorf Silver/oil vs silver/gold/oil
  174. What music/sound style for 845 tubes?
  175. Advice Needed
  176. Favorite ouput tube (SE only)
  177. Best make of audio valves/tubes
  178. How to calculate source impedance for audio transformer?
  179. Schematic for REDDi DI-Box?
  180. what the best kit for Dynaco
  181. That mystery trem cap
  182. A Hot Rodded Bottlehead S.E.X. Amplifier
  183. Cheap Chinese amps
  184. Wanted: Leak ST-50 Mains transformer 240V
  185. Eico HF-20 to bass guitar amp
  186. Ampeg B-18 issue/debug
  187. Who makes their own OPT around here?
  188. 71A
  189. Sound quality chinese tube amplifiers
  190. freeware circuit simulator for Osx (Mac)
  191. 12ax7LP substitute
  192. RH84 SE Build and custom Edcor power transformer
  193. 6l6 se primary impedance choice
  194. Luxman SQ38FD mkII, schematic
  195. 6c33 SET (my next project). Need some feedback
  196. Amorphous iron UMCCC-125: what would you do from it?
  197. Old Fisher SA-300 Amp help!
  198. What kind of sound does a noisy 12B4 make ??
  199. KT88 bias current keeps drifting
  200. Oddball Tube - Useful for Audio??
  201. 12AX7 dual triode "Signal Enhancer/Conditioner"
  202. 2nos of 6l6 in Parallel SE mode
  203. Output transformer selection
  204. 5C8S rectifier psud2 modle/rectifier information
  205. EF80 / KT77 SIngle Ended
  206. Longevity of output tubes in triode vs pentode
  207. Fender champ circuit low output.
  208. ekco ui59 receiver
  209. simple heater question .....
  210. Different Differential Pairs
  211. Decware Zen SET (first project/90% finished)
  212. YL-1200 for audioamp
  213. 7984's
  214. Building First Preamp HELP
  215. Aikido All-In-One Octal B+ measurement.
  216. OPT PP for GU50 Triode ?
  217. Requesting input on preamp schematic
  218. Longer life 6CA7's for class A
  219. Organ split
  220. Two amps done and done!
  221. Testing the 5842/417a on Sencore MU150?
  222. Why Class A Guitar Amplifiers Sound So Good ........
  223. Tube ID
  224. How to best drive an 845?
  225. K-16ls + ton pcb (just finished pics)
  226. Helios + Pultec tube EQ rack prototype.
  227. 12ax7 preamplifier with modified power supply!!! please help!
  228. tube amp prototype with pc
  229. Looking for a new diy project
  230. To James or to Baxandall?
  231. 45 triode : max 275 or 300 vdc ?
  232. Anyone with experience breaking in capacitors out of circuit?
  233. Vt-64/800 tube amp/preamp
  234. Hammond 1609 Output Transformer - EL84
  235. Chinese Capacitors
  236. 60 Watts A Channel 6528A Tube Amp
  237. AC or DC heathing?
  238. 1000W tube amplifier
  239. LEDs or RC?
  240. Is this amp worth bringing back to life?
  241. Melody PM845
  242. Need help troubleshooting this integrated.
  243. Wanted...design for D3a triode strapped driving 45
  244. Removing Tone Controls from VoM Preamp/Amp
  245. Philips 8580 useful anywhere?
  246. output transformer info
  247. 100Hz square preamp responce help
  248. 6P21s 6n21c tube, True Direct Heater?
  249. Convert Dogzilla for Hi-Fi output
  250. Bogen AP-35 Static and Pop from one channel

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