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  1. amplifier with 813 valves
  2. Changing plate resistor in live circuitry.
  3. 2xEL34 vs. 4xEL84 vs. 2x6L6 vs. 4x6V6
  4. KT88 drivers
  5. Simple Hybrid SE EL84 UL amp.. comments please.
  6. max input impedance for // el84's and other ?
  7. Please Help.. PCL81
  8. Some troubles with PSUD. A little help please !
  9. Why D getters?
  10. Help me information of the tubes?
  11. Questions about this line stage
  12. Need help from Aikido builder
  13. Aikesi賍机el34尋找國外代理,可以送一台!!
  14. Direct heating triodes are really better?
  15. Audio Reality is back, in digital format
  16. Stoetkit 25W integrated amp
  17. Tube Pre Amplifier for SEWA 7 Watt ClassA MOSFET
  18. Michaelson Audio Odysseus Problem.
  19. anyone living in australia (hopefully adelaide) willing to lend their puncher/bit?
  20. ReinoutdV
  21. Priboj amp schematic
  22. EL84 in ultra-linear mode
  23. internal shielding
  24. RIAA: what does it stand for?
  25. heathkit sa2 - new question
  26. RCA R35, 39 & 57 Terminal Usage...
  27. 45 into an 845 parafeed circuit
  28. Tubes power supply 220 t0 300V ?
  29. ripple values in B+ supply
  30. Capacitors and tubes for AA5?
  31. Dynaco PAS Rebuild
  32. Audio Research SP9 Circuit Diagram HELP!
  33. ARC reference II schematic
  34. 71a Line Stage and Miller Capacitance
  35. Low plate voltage pentode (<40v) for diff pair?
  36. loadlines for newbie.
  37. Measuring approx RMS power O/P
  38. Hybrid Aikido-ish gain stage
  39. Loftin-White coupling Questions
  40. 807 screen regulation
  41. What kills an opt tranny?
  42. EAR529 schematic diagram
  43. World Designs KEL84 Valve Amplifier
  44. what 300B design would you recommend but...
  45. My RIAA Phono Stage Project
  46. A2 Questions
  47. World Audio Design
  48. Seek for your comments/advice to newbie on Tube world
  49. CCSed LTP validity?
  50. Suitability of transmitter tubes for musical amplifiers
  51. Anyone using an 813 in pentode?
  52. Electrolytic in the feedback loop
  53. El34 PP Vs. El34 PSE
  54. RIAA Phono Amp Design
  55. Matching resistors to 1% or Better
  56. Wirewound cathode resistor
  57. Tube Hybrid Amp.
  58. Nasty ground loop
  59. ECC88 Class B
  60. Old Tube Amp Servicer In Nj???
  61. Vg-k max
  62. Anyone used PT15 / VT104 ?
  63. rebuild a Musical Fidelity X-10D ??
  64. Transformer Building
  65. Identifying weird signal transformer
  66. 100watt mono blocks
  67. Resistor combination calculator - RESCALC
  68. Aikido choice of valves (or tubes, if you will)
  69. Pin 9 on 6n6P, 6H30, etc
  70. Croft Super Micro meets Acoustat TNT200
  71. tube mic preamp kit??
  72. The SACD Meets Tubes
  73. Useful Abbreviations
  74. One B+ for the both driver and output tube if they are identical?
  75. Fisher 500B Schematic Question
  76. SE Output Transfromers Question
  77. Amplifier Project
  78. Grid Stopper for parallel sides of dual triode
  79. centre tap or floating heaters?
  80. Converting 6.3V to 6.3VCT Quick questions
  81. Russian Nuvistors...Anyone tried them?
  82. 一台300bc胆机,大家给点意见,谢谢
  83. Australian Amp Manufacturers
  84. Old radio quick question re PS
  85. Kt90 Pse
  86. Velleman K4040 is Always Blowing Output Tubes
  87. looking for transformer with the following specs?
  88. 5686 amplifier schematic
  89. Heaters for cathodes with a large swing
  90. 6DJ8 as phase splitter.
  91. New driver for SE 2A3
  92. I磛e made a Mu stage with 6888 and 6C45...
  93. Quick urgent Help plz !
  94. Cheap SET Kit for UK
  95. How can I change bias 6H30pi tube
  96. DHT heater voltage
  97. Ok SY...You Win
  98. Input level required- PP KT88
  99. SE 6C33C-B ; preview of a new Baby
  100. 2A3 grid DC voltage
  101. Dyna ST70 experience bypassing input tubes
  102. [Theory] Amplifier efficiency
  103. Pentode Cascode CCS
  104. Noval Relay
  105. Where to buy 6A5G ?
  106. AC or grounded DC for heater?
  107. EM84 based VUmeter "lines" don't go to zero
  108. 'scoping tube amps
  109. Preferred operating points of small signal triodes
  110. Is the Nuvistor Better Than The 12B4 For A Line Stage
  111. audio research schematics
  112. Looking to put the entire (last edition) RCA and Sylvania books online
  113. 5693 as a phono preamp?
  114. Audible Illusions Dual Mono Preamplifier
  115. should the filaments be already hot before the B+ is applied or
  116. One Electron vs. Transcendar
  117. &quot;Y&quot; caps? current bleed?
  118. I made a 200W tube amp!
  119. Power amp kit for a complete newbie
  120. Confused, datasheet of 417A/5842
  121. Audio Amp Project
  122. Neutrik XLR for Umbilical
  123. Primary Impedance
  124. Need help for HV section Design
  125. power amp kit recommendations
  126. 6N6P vs 5687
  127. Triode spice models for Circuit maker
  128. My ARC D70 get trouble
  129. when using PSUD2, do you...
  130. Depression... and a plea for help!!!
  131. Weston 981 Type 3 schematic and parts list needed
  132. 3W 6C33B-C SE OTL schematics ready
  133. Batory tubes, anyone familiar with these?
  134. Musical Pre-amp topology needed. Interstages please apply!
  135. Tube power Amp matching with SAE Mark M pre amp and AR18 speaker or MS 25i
  136. PowerDrive Circuit for 805 (+ve grid bias)
  137. Alternate spice models
  138. Is this heater supply OK?
  139. Basic RC Value Question
  140. Hookup powersubwoofer to a tube receiver.
  141. Transformer question RE; connections on phono stage
  142. Rectifier Tubes Data - Quick Sheet
  143. Which cabling to use?
  144. Need 396A/6N3P/2C51/407A spice model
  145. Antek Toroidal Power Transformers
  146. HT stands for???
  147. Is it possible to hook up 6c33 plate in parallel
  148. Help eliminating hum
  149. Tube LTP CCS?
  150. Trancsendar Transformers
  151. Hafler/Keroes 6L6 UL
  152. hum
  153. Leads for ISCO PS?
  154. Negative Feedback Bogen CHB100
  155. TubeCad's Hybrid amp question
  156. Cathode bias resistor value for 6SN7?
  157. El84 2-Channel Mono Blocks
  158. Tube Design Books
  159. Interesting Williamson article..
  160. Locating Preamp Output Transformers
  161. Plate characteristics
  162. How do you finance A Great DIY Audio Amp?
  163. 808 Se
  164. Parafeed doubt
  165. A little research: old tube amps from the past
  166. RCA Victor stereo cabinet amp-newb question
  167. Transformer temperature?
  168. switch in SPICE
  169. Using a standard pentode-tetrode as output "space-charge tube" any ideas-experiences?
  170. Tube testers which is the best?
  171. finished !!!
  172. Transformer Leg Connection Question
  173. simple ccs under 5-10mA ?
  174. Curcio Sarah Phono stage: opinions?
  175. suggest a KT88 SE to build
  176. Transformer potting material??
  177. Jan E Veiset Mini EL84 pp
  178. Some questions on non common things
  179. basic question on plate curves
  180. Euro barrier strip palace
  181. ARC D90 needs new electrolytics
  182. 5763 Triode Strapped
  183. Recommend me some transformers for a PP EL84
  184. grid LED bias?
  185. Help on tube socket
  186. Taking CFB to the extremes...?
  187. Output section impedance change query
  188. Tube Suggestions
  189. 82 Popped
  190. OPT Project for EL84 SE
  191. Interesting eBay "listing" for tube amp
  192. How to chose the right choke
  193. Eco warrior thinking of jumping ship !!!
  194. HELP! Cathode bypass caps keep going...
  195. Best Operating point for a 2A3?
  196. Need help with preamp
  197. Best place to buy valves and components?
  198. Replacing cathode resistors of Aikido 1st stage (or other SRPP circuit) with chokes
  199. Circuit calculations
  200. Finally going to give my TVC/active preamp a real home...
  201. Suggestion on the input transformer for tube preamp
  202. sylvania & GE tubes
  203. SE Amplifier
  204. "fisss" on the 6C33C-pp
  205. Best price for tube output and power transformers ?
  206. What kind of output transformer?
  207. transformer
  208. 20W PP Choke PSU Question
  209. Regulated B+ supplies (using tubes)
  210. Confused by the numbers
  211. Feedback on Thorsten's legacy "universal dht" amp
  212. Are there techniques for triode-strapping on the fly?
  213. The best bias point for KT88
  214. All tube CCS
  215. GU50 SE Amplifier class A , with 6SN7 Full construction details
  216. 50L6GT & 6L6GT sounds ??
  217. Powerdrive
  218. Filament voltage and affect on Rp
  219. Tube pre-amplifier PSU
  220. Help with a cathode coupled pentode driver?
  221. Amp that has the biggest number of irons
  222. 12AX7A replacement
  223. Bogen CHB-10A Conversion, need help and advice
  224. Who said it was a good idea to try pentode!
  225. Input level
  226. 6V6GT
  227. 6AR6
  228. Any TCJ Push-Pull Calculator users?
  229. 211 Push pull operation points
  230. Edcor CXSE25-8-4K vs Hammond 1628SEA?
  231. 50W KT88 PP w/ NFB on Bonavolta
  232. Looking for nuvistor pre-amp preamp schematic please. 6CW4?
  233. BELL 3030 Amplifier
  234. Diy Paradise!
  235. Another PP 6B4G
  236. How to get a buffer with overdrive from a 12AX7 ?
  237. Pulsating Glow
  238. Question on using glow tubes (v-regs)
  239. Eliminating the OPT: impedance matching
  240. KT88 and push-pull ultra-linear
  241. Positronic Tubes
  242. Paint steel chassis with the "aluminum paint" used on wire fence?
  243. Best bias for 6cg7
  244. 829B Based Amp
  245. slight hum still haunting me
  246. CCS bias question
  247. Can't get solder to stick
  248. EL84 amp plus subwoofers? STUPID? OR NOT?
  249. Johan Potgieter
  250. parallel sections

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