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  1. Any issues with adding a grounded power cord to a Heathkit IT-17 tube tester?
  2. HELP to ID push pull/Single Ende
  3. 12BH7,6414,and 12AT7 to drive EL34 better
  4. Testing Tube Amplifiers
  5. trade off higher HT current for lower filament current ?
  6. Any Russian analog of 12BY7 ?
  7. SV572-10 still being made?
  8. PP Output Transformer Testing Puzzle
  9. baby steps
  10. Partial FB: 2 SE + 1 PI = PP?
  11. G-807=807 SE or PP?
  12. 1Hz oscillation with CCS biased output valves
  13. Ultra-linear 6L6 output stage
  14. Transformer or capacitor coupling?
  15. Victor (JVC) Tube Amp MCM-200
  16. MiniWatt N3 problems, oscillation thumping and RF/motor problems.
  17. A2293 pins connection, help !!!
  18. Start-Up Delay for tube amp !
  19. Getting OPT in Japan?
  20. cathode follower tube buffer using 6n6p
  21. Buzz at output until tubes conduct
  22. I need help for amps.
  23. UL Connection results in higher distortion
  24. Header bypass Cap?
  25. DC heater large cap
  26. How to lower preamp output?
  27. Why use a pre amplifier
  28. DHT-buffered NOS-dac
  29. Microphonics 12AY7 v.s. 12AX7
  30. ECC99/2A3 interstage finished, but have one query
  31. Tube lovers in Germany?
  32. preamplifier
  33. Choosing grid leak resistor value -- partly subjective?
  34. What does the acronym "AMW" stand for?
  35. 6C33C distortion spectrum
  36. 6C33C OTL DC schematic needed
  37. help with identifying the cause of preamp problem
  38. Rosenblit 70w Mac amp
  39. Grounding scheme
  40. CC vs Shunt filament supply?
  41. Need opinions on boxing a dual mono line stage
  42. Lets settle the b+ on cold tubes issue!
  43. New 2A3 SET / Simple, but gentle sounding amplifier
  44. Magnavox Console Amp Chassis
  45. transformer identification
  46. 50Wrms audio amplifier
  47. 12B4 have a good sound ???
  48. almarro OPT question
  49. Best EL84pp kit??
  50. Clarion 6L6G Oscillator Amp.
  51. Did you hear an original tube sound?
  52. Designing an OTL / Circlotron
  53. Cayin A55t or AudioSpace AS-8i Mk.III
  54. filament voltage question
  55. 7236 vs 6AS7 ?
  56. Bias Circuit Calculation
  57. 6V6 Hum Issues
  58. Crossover co-axial
  59. Wurlitzer 6420 to audio amplifiers
  60. Advice on Parafeed Output Transformer
  61. mingda mc34ab mods?
  62. small and cheap OTL schematic needed
  63. ecl82 or ecl86 amplifier decision
  64. Well Here Goes... K16LS in Dynaco Chassis?
  65. Not too often you see one of those
  66. Sweet Peach vs Meng Yue EL84
  67. Attempt at giving back: 6L6GC SE amplifier
  68. Best Complete KT88 Amp Kit under $1K?
  69. Webcor Musicale OT puzzle
  70. Audio Research SP3a
  71. Preamp Conord´s with some malfunctioning
  72. Oscillating PSU above certain voltage
  73. B+ voltage load line question
  74. ming da tube amp smell
  75. Rebuilding my amp, would like some input.
  76. do any of these cv4024s seem genuine to you?
  77. Stupid question: EL34 tubes.
  78. PP with Unbalanced concertina = 2nd H?
  79. harmonic distortion
  80. Enhanced Tube's performance
  81. New GU50 SE: SRRP or Cascode for driver?
  82. Hivac XN11 tubes
  83. Conrad Johnson PV-10a hum. Any advice?
  84. Bob Carver's eye candy on eBay
  85. MFA Lumi started "motor-boating" today
  86. New GM70 tube with problem
  87. Interested in building together a 300B tube amp?
  88. cayin a-55t want to use el34
  89. Mc240
  90. Dht ?
  91. too much output impedance?
  92. College-proofing an ST-70 (aka autobias+ST-70)
  93. reverse polarity of the chinese goods?
  94. 6bg6 and 8k opt power amp project
  95. Need some calculation assist for a psu
  96. Baldwin Transformer Swap
  97. THD, s/n and IM noisy measurements
  98. Little dot 2+, got spark
  99. (INDIA) urgent - high-quality amp builders/techs in Delhi?
  100. What causes saturation in tubes?
  101. Plug and Play Power Supply
  102. GE 5814 and 12AUCIFTE
  103. Amplifier oscillates - advice sought
  104. 50s Amplifier
  105. power supply design question 832A amp
  106. Klimo power supply advice
  107. Earth Not Connected
  108. DC heater supply for phono pre
  109. Audio Note P2SE problem
  110. Aikido Transformers - Good Choice?
  111. Caps before or after MOSFET V-regulator
  112. Which capacitors should I replace?
  113. Testing Amplifiers
  114. Choosing choke valuein pre amp tube
  115. Supertriode with PNP transistors
  116. too much gain
  117. Lloyd's Vintage High Fidelity Audio Devices - both Tube and Solid State
  118. Cheap eBay "zoe_tsan" tube kits - worth anything?
  119. Bell Vintage High Fidelity Audio Devices - both Tube and Solid State
  120. Small Tube Amp with Hum
  121. tube rectifier question
  122. Unison Research S6 schematics
  123. vacuum tube amplifiers should be produced like this?
  124. 6d22s to 6cj3
  125. pot in tube preamp
  126. Mable Audio vs. Suppo audio sound quality
  127. swdfasdfsdf
  128. measuring heater voltage
  129. Need a circuit around these tubes.
  130. Single-Ended 13E1 amplifier
  131. Whats' the max allowable / reasonable ripple in SE amp?
  132. What amp kits are out there?
  133. ECC84/6N14P for audio
  134. PSU ignorant
  135. How to define a quality OT?
  136. Looking for some build advice
  137. ASC oil caps vs M-tube cap for ps
  138. SS CCS and distortion
  139. the valve with no markings
  140. Pentode AB1 design school???
  141. Capability of Sony/Tamradio SE Output Transformers
  142. my CELLINI triode amp
  143. 45-based SET -> Pass Labs F4
  144. Testing Amplifiers - Speaker or dummy load
  145. Quiet amp hums with signal source or input directly tied to star earth??
  146. amp output testing
  147. S5 Amp Comparison?
  148. How to Ground a Preamp PCB Board?
  149. RH807 / 6L6GC g2 issues
  150. 2010: Replacement for Black Gate WKZ 100uF+100uF 500V
  151. sunn solarus guitar amp
  152. Converting Dynaco ST70 Power Transformer for 12.6V
  153. Simple CF with 5687/6900/E182CC
  154. World Audio Design 5881 Schematic needed
  155. PP triode transformer load
  156. 6V6 PP load line
  157. Need help to under stand this 6n3 Kit from ebay
  158. Help:ampeg svt 2 pro 100v>>240v
  159. Blown left channel
  160. Tube preamp build help-heaters
  161. Medium Power SET, EL156 based
  162. Concertina Splitter question - Need help
  163. 6V6 amp - schematic options
  164. Lectron pa50+jh50
  165. 4pr60b valve
  166. Transformer phase splitter
  167. Help! ground hum
  168. Question regarding Leak Stereo 20 and 6SN7 line stage preamp
  169. Recommended upgrades for Yaqin Tube Buffer ?
  170. 6J5 or 6S4 mic amp?
  171. ST-70 build, ideas and advice
  172. Yaqin MC-100B Help Needed!
  173. Preamp Aikido : 6ax5GT,12au7,2c51
  174. Heater of tube
  175. R-Core Winders
  176. 1946 philco amp, tuner, record player
  177. otions for drawing tube schematics on Mac..?
  178. Push/Pull Plate Load Choke - how to figure Inductance?
  179. 6aw8-a tube question
  180. Newbie needs a point in the right direction
  181. Minimalist PL519 OTL?
  182. Telefunken schematics
  183. parallel pp EL84
  184. AD1 Operating Question
  185. 6П3С-Е Russian NOS: Gas Problem
  186. Favourite EL34 circuit
  187. Medium power SET with parallel OP tubes
  188. sds labs into Pas3
  189. Low voltage 6922 preamp...wanting a schematic
  190. Voltage Gain on Long Tailed Drivers
  191. Purpose of 5842 tube?!?
  192. MA XDSE KT88 vs YAQIN MC-100B KT88
  193. JBL Amplifier story
  194. Fender tweed pro-amp clone
  195. Recommended spacing for multiple 5AR4's
  196. Cap choices coupling
  197. Output transformer for PP EL34 source
  198. mini max pre
  199. use 2 ohm speakers
  200. Ask tube rect 5u4c and JJ caps
  201. Adding caps to prevent oscilation in AF 5687
  202. Williamson on EL84. Is it worth doing?
  203. CCS and regulated B+
  204. Garter cross-coupled feedback
  205. soundcard protection Z ???
  206. Using a CCS on SE Output Stage
  207. First amp build... help please!
  208. multiple independent grid biasing from 1 mosfet
  209. Eico HF-81 modification opinion
  210. 4K or 5K Output Transformer
  211. Noisy input on Michaelson & Austin TVA-1
  212. Precision Electronics S-35 help,
  213. Rogers Cadet 3 Problem
  214. Triode Electronics VS Hammond
  215. TRIODE OPERATION USING THE SCREEN GRIDS AS THE CONTROL GRID - this work ?
  216. Start up delay needed???
  217. Connecting a stereo amp as a mono-block
  218. HQ-DHT (All tube DHT amli) 26-45-2A3
  219. 24A tube in triode mode, help !!!
  220. Amperite Ballast
  221. Need super quiet 6.3V filament supply schematic
  222. (Sound Space)Houston 2A3 Power Amplifier
  223. James Burgess 2A3 Monoblocks
  224. Funny tube tale from southamerica
  225. RCA 7189 Black Plates
  226. Preamp nasty noise and hum
  227. EDCOR VS One Electron
  228. Parallel output tubes/valves in push pull. Advantages/disadvantages?
  229. Robinhood output transformers?
  230. looking for help diagnosing volume loss on tube amplified reel to reel player
  231. Question about power consumption Hagerman Cornet Octal
  232. valve rectifier in PSUD
  233. Can you explain what this is ?
  234. volume rise with frequency problem
  235. 1 + 1 = 3 :)
  236. What would the perfect multi-way speaker for a tube amp look like?
  237. GU50 compared with EL84
  238. Counterpoint SA-4 manual and schematics
  239. Ever heard of a Valvo 16ECC ?
  240. the Reversal SRPP
  241. Want to build a C3G linestage
  242. 30A5 tubes
  243. Good speakers to match a K-12
  244. Driving Long Cables, how much current?
  245. twin triode question
  246. Am I going to blow up my 7189s
  247. How is wattage calculated when only using a single section?
  248. Counterpoint SA5 problems and a question.
  249. Headphone Amplifier 6922EH
  250. Fuse Clip for Small Plate Cap Use

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