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  1. internal shielding
  2. RIAA: what does it stand for?
  3. Socket Mounting Rings
  4. heathkit sa2 - new question
  5. RCA R35, 39 & 57 Terminal Usage...
  6. 45 into an 845 parafeed circuit
  7. Tubes power supply 220 t0 300V ?
  8. ripple values in B+ supply
  9. Capacitors and tubes for AA5?
  10. Dynaco PAS Rebuild
  11. Audio Research SP9 Circuit Diagram HELP!
  12. ARC reference II schematic
  13. 71a Line Stage and Miller Capacitance
  14. Low plate voltage pentode (<40v) for diff pair?
  15. loadlines for newbie.
  16. Measuring approx RMS power O/P
  17. Hybrid Aikido-ish gain stage
  18. Loftin-White coupling Questions
  19. 807 screen regulation
  20. What kills an opt tranny?
  21. EAR529 schematic diagram
  22. World Designs KEL84 Valve Amplifier
  23. what 300B design would you recommend but...
  24. Replacement conductance meter for Hickok 533A
  25. My RIAA Phono Stage Project
  26. A2 Questions
  27. World Audio Design
  28. Seek for your comments/advice to newbie on Tube world
  29. CCSed LTP validity?
  30. Suitability of transmitter tubes for musical amplifiers
  31. Anyone using an 813 in pentode?
  32. Electrolytic in the feedback loop
  33. El34 PP Vs. El34 PSE
  34. RIAA Phono Amp Design
  35. Matching resistors to 1% or Better
  36. Wirewound cathode resistor
  37. Tube Hybrid Amp.
  38. Nasty ground loop
  39. ECC88 Class B
  40. Cree diodes
  41. Old Tube Amp Servicer In Nj???
  42. Vg-k max
  43. Anyone used PT15 / VT104 ?
  44. rebuild a Musical Fidelity X-10D ??
  45. Transformer Building
  46. Identifying weird signal transformer
  47. 100watt mono blocks
  48. Resistor combination calculator - RESCALC
  49. Aikido choice of valves (or tubes, if you will)
  50. Pin 9 on 6n6P, 6H30, etc
  51. Croft Super Micro meets Acoustat TNT200
  52. tube mic preamp kit??
  53. The SACD Meets Tubes
  54. Useful Abbreviations
  55. cap value for 6X4 rectifier?
  56. One B+ for the both driver and output tube if they are identical?
  57. Fisher 500B Schematic Question
  58. SE Output Transfromers Question
  59. Amplifier Project
  60. Grid Stopper for parallel sides of dual triode
  61. centre tap or floating heaters?
  62. Converting 6.3V to 6.3VCT Quick questions
  63. Russian Nuvistors...Anyone tried them?
  64. 一台300bc胆机,大家给点意见,谢谢
  65. Australian Amp Manufacturers
  66. Old radio quick question re PS
  67. Kt90 Pse
  68. Velleman K4040 is Always Blowing Output Tubes
  69. looking for transformer with the following specs?
  70. 5686 amplifier schematic
  71. Heaters for cathodes with a large swing
  72. 6DJ8 as phase splitter.
  73. New driver for SE 2A3
  74. I磛e made a Mu stage with 6888 and 6C45...
  75. Quick urgent Help plz !
  76. Cheap SET Kit for UK
  77. How can I change bias 6H30pi tube
  78. DHT heater voltage
  79. Ok SY...You Win
  80. Input level required- PP KT88
  81. SE 6C33C-B ; preview of a new Baby
  82. 2A3 grid DC voltage
  83. Dyna ST70 experience bypassing input tubes
  84. [Theory] Amplifier efficiency
  85. Pentode Cascode CCS
  86. Noval Relay
  87. Where to buy 6A5G ?
  88. AC or grounded DC for heater?
  89. EM84 based VUmeter "lines" don't go to zero
  90. 'scoping tube amps
  91. Preferred operating points of small signal triodes
  92. Is the Nuvistor Better Than The 12B4 For A Line Stage
  93. audio research schematics
  94. Looking to put the entire (last edition) RCA and Sylvania books online
  95. 5693 as a phono preamp?
  96. Audible Illusions Dual Mono Preamplifier
  97. should the filaments be already hot before the B+ is applied or
  98. One Electron vs. Transcendar
  99. &quot;Y&quot; caps? current bleed?
  100. I made a 200W tube amp!
  101. Power amp kit for a complete newbie
  102. Confused, datasheet of 417A/5842
  103. Audio Amp Project
  104. Tube tester settings?
  105. Neutrik XLR for Umbilical
  106. Primary Impedance
  107. Need help for HV section Design
  108. power amp kit recommendations
  109. 6N6P vs 5687
  110. Triode spice models for Circuit maker
  111. My ARC D70 get trouble
  112. when using PSUD2, do you...
  113. Depression... and a plea for help!!!
  114. Weston 981 Type 3 schematic and parts list needed
  115. 3W 6C33B-C SE OTL schematics ready
  116. Batory tubes, anyone familiar with these?
  117. Musical Pre-amp topology needed. Interstages please apply!
  118. Tube power Amp matching with SAE Mark M pre amp and AR18 speaker or MS 25i
  119. PowerDrive Circuit for 805 (+ve grid bias)
  120. Alternate spice models
  121. Is this heater supply OK?
  122. Basic RC Value Question
  123. Hookup powersubwoofer to a tube receiver.
  124. Transformer question RE; connections on phono stage
  125. Rectifier Tubes Data - Quick Sheet
  126. Now This is A Tube Guitar Amp!!
  127. Which cabling to use?
  128. Need 396A/6N3P/2C51/407A spice model
  129. Antek Toroidal Power Transformers
  130. HT stands for???
  131. Is it possible to hook up 6c33 plate in parallel
  132. Help eliminating hum
  133. Tube LTP CCS?
  134. Trancsendar Transformers
  135. Hafler/Keroes 6L6 UL
  136. hum
  137. Leads for ISCO PS?
  138. Negative Feedback Bogen CHB100
  139. TubeCad's Hybrid amp question
  140. Cathode bias resistor value for 6SN7?
  141. El84 2-Channel Mono Blocks
  142. Tube Design Books
  143. Interesting Williamson article..
  144. Locating Preamp Output Transformers
  145. Plate characteristics
  146. How do you finance A Great DIY Audio Amp?
  147. 808 Se
  148. Parafeed doubt
  149. A little research: old tube amps from the past
  150. RCA Victor stereo cabinet amp-newb question
  151. Transformer temperature?
  152. switch in SPICE
  153. Using a standard pentode-tetrode as output "space-charge tube" any ideas-experiences?
  154. Tube testers which is the best?
  155. finished !!!
  156. Transformer Leg Connection Question
  157. simple ccs under 5-10mA ?
  158. Curcio Sarah Phono stage: opinions?
  159. suggest a KT88 SE to build
  160. Transformer potting material??
  161. Jan E Veiset Mini EL84 pp
  162. Some questions on non common things
  163. basic question on plate curves
  164. Euro barrier strip palace
  165. ARC D90 needs new electrolytics
  166. 5763 Triode Strapped
  167. Recommend me some transformers for a PP EL84
  168. grid LED bias?
  169. Help on tube socket
  170. Taking CFB to the extremes...?
  171. Output section impedance change query
  172. Tube Suggestions
  173. 82 Popped
  174. OPT Project for EL84 SE
  175. Interesting eBay "listing" for tube amp
  176. How to chose the right choke
  177. Eco warrior thinking of jumping ship !!!
  178. HELP! Cathode bypass caps keep going...
  179. Best Operating point for a 2A3?
  180. Need help with preamp
  181. Best place to buy valves and components?
  182. Replacing cathode resistors of Aikido 1st stage (or other SRPP circuit) with chokes
  183. Circuit calculations
  184. Finally going to give my TVC/active preamp a real home...
  185. Suggestion on the input transformer for tube preamp
  186. sylvania & GE tubes
  187. SE Amplifier
  188. "fisss" on the 6C33C-pp
  189. Best price for tube output and power transformers ?
  190. What kind of output transformer?
  191. transformer
  192. 20W PP Choke PSU Question
  193. Regulated B+ supplies (using tubes)
  194. Confused by the numbers
  195. Feedback on Thorsten's legacy "universal dht" amp
  196. Are there techniques for triode-strapping on the fly?
  197. PROJECT begins: bass preamp
  198. The best bias point for KT88
  199. All tube CCS
  200. GU50 SE Amplifier class A , with 6SN7 Full construction details
  201. 50L6GT & 6L6GT sounds ??
  202. Especially for Tubelab: 845 amp 2.0
  203. Mini guitar amp from a Webcor tape amp, is it possible?
  204. Powerdrive
  205. Filament voltage and affect on Rp
  206. Tube pre-amplifier PSU
  207. Help with a cathode coupled pentode driver?
  208. Amp that has the biggest number of irons
  209. 12AX7A replacement
  210. Bogen CHB-10A Conversion, need help and advice
  211. Who said it was a good idea to try pentode!
  212. Input level
  213. 6V6GT
  214. 6AR6
  215. Any TCJ Push-Pull Calculator users?
  216. 211 Push pull operation points
  217. Edcor CXSE25-8-4K vs Hammond 1628SEA?
  218. Bass guitar preamp
  219. 50W KT88 PP w/ NFB on Bonavolta
  220. Looking for nuvistor pre-amp preamp schematic please. 6CW4?
  221. BELL 3030 Amplifier
  222. Diy Paradise!
  223. Another PP 6B4G
  224. How to get a buffer with overdrive from a 12AX7 ?
  225. Pulsating Glow
  226. Question on using glow tubes (v-regs)
  227. Eliminating the OPT: impedance matching
  228. KT88 and push-pull ultra-linear
  229. Positronic Tubes
  230. Paint steel chassis with the "aluminum paint" used on wire fence?
  231. Best bias for 6cg7
  232. Coupling caps test bed
  233. 829B Based Amp
  234. slight hum still haunting me
  235. CCS bias question
  236. Can't get solder to stick
  237. EL84 amp plus subwoofers? STUPID? OR NOT?
  238. Johan Potgieter
  239. parallel sections
  240. PL504/EL84 SE vs parafeed
  241. [help] Look for McIntosh MI-200 Circuit diagram
  242. My experience: the cheap punch set VS Greenlee punch
  243. 6V6GT SE schematic -need!!!
  244. What's the deal with Broskie's iPod buddy?
  245. a quiz about AC power
  246. Beard P100 Amplifier
  247. Quick identification question
  248. 6V6 guitar amp design attempt
  249. Some more RIAA questions
  250. what to do?

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