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  1. How to test voltages on secondaries?
  2. Audio innovation L1 valve replacement
  3. Is this in-rush current?
  4. TETRODE amplifiers
  5. Audio Shop Eifl Corporation
  6. 6sn7 Buffer
  7. Marantz 8b operating voltages
  8. amplifier with 813 valves
  9. Changing plate resistor in live circuitry.
  10. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  11. KT88 drivers
  12. Simple Hybrid SE EL84 UL amp.. comments please.
  13. max input impedance for // el84's and other ?
  14. Please Help.. PCL81
  15. Some troubles with PSUD. A little help please !
  16. Why D getters?
  17. Help me information of the tubes?
  18. Questions about this line stage
  19. 5Z4P rectifier tube question
  20. Need help from Aikido builder
  21. Aikesi賍机el34尋找國外代理,可以送一台!!
  22. Direct heating triodes are really better?
  23. Audio Reality is back, in digital format
  24. Stoetkit 25W integrated amp
  25. Switchable stages with Tubelab抯 hybrid MOSFET/ 845 SE amp?
  26. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  27. Michaelson Audio Odysseus Problem.
  28. ASC metal can polypro caps: ground the metal can to AC ground?
  29. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  30. ReinoutdV
  31. Priboj amp schematic
  32. EL84 in ultra-linear mode
  33. internal shielding
  34. RIAA: what does it stand for?
  35. Socket Mounting Rings
  36. heathkit sa2 - new question
  37. RCA R35, 39 & 57 Terminal Usage...
  38. 45 into an 845 parafeed circuit
  39. Tubes power supply 220 t0 300V ?
  40. ripple values in B+ supply
  41. Capacitors and tubes for AA5?
  42. Dynaco PAS Rebuild
  43. Audio Research SP9 Circuit Diagram HELP!
  44. ARC reference II schematic
  45. 71a Line Stage and Miller Capacitance
  46. Low plate voltage pentode (<40v) for diff pair?
  47. loadlines for newbie.
  48. Measuring approx RMS power O/P
  49. Hybrid Aikido-ish gain stage
  50. Loftin-White coupling Questions
  51. 807 screen regulation
  52. What kills an opt tranny?
  53. EAR529 schematic diagram
  54. World Designs KEL84 Valve Amplifier
  55. what 300B design would you recommend but...
  56. Replacement conductance meter for Hickok 533A
  57. My RIAA Phono Stage Project
  58. A2 Questions
  59. World Audio Design
  60. Seek for your comments/advice to newbie on Tube world
  61. CCSed LTP validity?
  62. Suitability of transmitter tubes for musical amplifiers
  63. Anyone using an 813 in pentode?
  64. Electrolytic in the feedback loop
  65. El34 PP Vs. El34 PSE
  66. RIAA Phono Amp Design
  67. Matching resistors to 1% or Better
  68. Wirewound cathode resistor
  69. Tube Hybrid Amp.
  70. Nasty ground loop
  71. ECC88 Class B
  72. Cree diodes
  73. Old Tube Amp Servicer In Nj???
  74. Vg-k max
  75. Anyone used PT15 / VT104 ?
  76. rebuild a Musical Fidelity X-10D ??
  77. Transformer Building
  78. Identifying weird signal transformer
  79. 100watt mono blocks
  80. Resistor combination calculator - RESCALC
  81. Aikido choice of valves (or tubes, if you will)
  82. Pin 9 on 6n6P, 6H30, etc
  83. Croft Super Micro meets Acoustat TNT200
  84. tube mic preamp kit??
  85. The SACD Meets Tubes
  86. Useful Abbreviations
  87. cap value for 6X4 rectifier?
  88. One B+ for the both driver and output tube if they are identical?
  89. Fisher 500B Schematic Question
  90. SE Output Transfromers Question
  91. Amplifier Project
  92. Grid Stopper for parallel sides of dual triode
  93. centre tap or floating heaters?
  94. Converting 6.3V to 6.3VCT Quick questions
  95. Russian Nuvistors...Anyone tried them?
  96. 一台300bc胆机,大家给点意见,谢谢
  97. Australian Amp Manufacturers
  98. Old radio quick question re PS
  99. Kt90 Pse
  100. Velleman K4040 is Always Blowing Output Tubes
  101. looking for transformer with the following specs?
  102. 5686 amplifier schematic
  103. Heaters for cathodes with a large swing
  104. 6DJ8 as phase splitter.
  105. New driver for SE 2A3
  106. I磛e made a Mu stage with 6888 and 6C45...
  107. Quick urgent Help plz !
  108. Cheap SET Kit for UK
  109. How can I change bias 6H30pi tube
  110. DHT heater voltage
  111. Ok SY...You Win
  112. Input level required- PP KT88
  113. SE 6C33C-B ; preview of a new Baby
  114. 2A3 grid DC voltage
  115. Dyna ST70 experience bypassing input tubes
  116. [Theory] Amplifier efficiency
  117. Pentode Cascode CCS
  118. Noval Relay
  119. Where to buy 6A5G ?
  120. AC or grounded DC for heater?
  121. EM84 based VUmeter "lines" don't go to zero
  122. 'scoping tube amps
  123. Preferred operating points of small signal triodes
  124. Is the Nuvistor Better Than The 12B4 For A Line Stage
  125. audio research schematics
  126. Looking to put the entire (last edition) RCA and Sylvania books online
  127. 5693 as a phono preamp?
  128. Audible Illusions Dual Mono Preamplifier
  129. should the filaments be already hot before the B+ is applied or
  130. One Electron vs. Transcendar
  131. &quot;Y&quot; caps? current bleed?
  132. I made a 200W tube amp!
  133. Power amp kit for a complete newbie
  134. Confused, datasheet of 417A/5842
  135. Audio Amp Project
  136. Tube tester settings?
  137. Neutrik XLR for Umbilical
  138. Primary Impedance
  139. Need help for HV section Design
  140. power amp kit recommendations
  141. 6N6P vs 5687
  142. Triode spice models for Circuit maker
  143. My ARC D70 get trouble
  144. when using PSUD2, do you...
  145. Depression... and a plea for help!!!
  146. Weston 981 Type 3 schematic and parts list needed
  147. 3W 6C33B-C SE OTL schematics ready
  148. Batory tubes, anyone familiar with these?
  149. Musical Pre-amp topology needed. Interstages please apply!
  150. Tube power Amp matching with SAE Mark M pre amp and AR18 speaker or MS 25i
  151. PowerDrive Circuit for 805 (+ve grid bias)
  152. Alternate spice models
  153. Is this heater supply OK?
  154. Basic RC Value Question
  155. Hookup powersubwoofer to a tube receiver.
  156. Transformer question RE; connections on phono stage
  157. Rectifier Tubes Data - Quick Sheet
  158. Now This is A Tube Guitar Amp!!
  159. Which cabling to use?
  160. Need 396A/6N3P/2C51/407A spice model
  161. Antek Toroidal Power Transformers
  162. HT stands for???
  163. Is it possible to hook up 6c33 plate in parallel
  164. Help eliminating hum
  165. Tube LTP CCS?
  166. Trancsendar Transformers
  167. Hafler/Keroes 6L6 UL
  168. hum
  169. Leads for ISCO PS?
  170. Negative Feedback Bogen CHB100
  171. TubeCad's Hybrid amp question
  172. Cathode bias resistor value for 6SN7?
  173. El84 2-Channel Mono Blocks
  174. Tube Design Books
  175. Interesting Williamson article..
  176. Locating Preamp Output Transformers
  177. Plate characteristics
  178. How do you finance A Great DIY Audio Amp?
  179. 808 Se
  180. Parafeed doubt
  181. A little research: old tube amps from the past
  182. RCA Victor stereo cabinet amp-newb question
  183. Transformer temperature?
  184. switch in SPICE
  185. Using a standard pentode-tetrode as output "space-charge tube" any ideas-experiences?
  186. Tube testers which is the best?
  187. finished !!!
  188. Transformer Leg Connection Question
  189. simple ccs under 5-10mA ?
  190. Curcio Sarah Phono stage: opinions?
  191. suggest a KT88 SE to build
  192. Transformer potting material??
  193. Jan E Veiset Mini EL84 pp
  194. Some questions on non common things
  195. basic question on plate curves
  196. Euro barrier strip palace
  197. ARC D90 needs new electrolytics
  198. 5763 Triode Strapped
  199. Recommend me some transformers for a PP EL84
  200. grid LED bias?
  201. Help on tube socket
  202. Taking CFB to the extremes...?
  203. Output section impedance change query
  204. Tube Suggestions
  205. 82 Popped
  206. OPT Project for EL84 SE
  207. Interesting eBay "listing" for tube amp
  208. How to chose the right choke
  209. Eco warrior thinking of jumping ship !!!
  210. HELP! Cathode bypass caps keep going...
  211. Best Operating point for a 2A3?
  212. Need help with preamp
  213. Best place to buy valves and components?
  214. Replacing cathode resistors of Aikido 1st stage (or other SRPP circuit) with chokes
  215. Circuit calculations
  216. Finally going to give my TVC/active preamp a real home...
  217. Suggestion on the input transformer for tube preamp
  218. sylvania & GE tubes
  219. SE Amplifier
  220. "fisss" on the 6C33C-pp
  221. Best price for tube output and power transformers ?
  222. What kind of output transformer?
  223. transformer
  224. 20W PP Choke PSU Question
  225. Regulated B+ supplies (using tubes)
  226. Confused by the numbers
  227. Feedback on Thorsten's legacy "universal dht" amp
  228. Are there techniques for triode-strapping on the fly?
  229. PROJECT begins: bass preamp
  230. The best bias point for KT88
  231. All tube CCS
  232. GU50 SE Amplifier class A , with 6SN7 Full construction details
  233. 50L6GT & 6L6GT sounds ??
  234. Especially for Tubelab: 845 amp 2.0
  235. Mini guitar amp from a Webcor tape amp, is it possible?
  236. Powerdrive
  237. Filament voltage and affect on Rp
  238. Tube pre-amplifier PSU
  239. Help with a cathode coupled pentode driver?
  240. Amp that has the biggest number of irons
  241. 12AX7A replacement
  242. Bogen CHB-10A Conversion, need help and advice
  243. Who said it was a good idea to try pentode!
  244. Input level
  245. 6V6GT
  246. 6AR6
  247. Any TCJ Push-Pull Calculator users?
  248. 211 Push pull operation points
  249. Edcor CXSE25-8-4K vs Hammond 1628SEA?
  250. Bass guitar preamp

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