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  1. Anyone using an 813 in pentode?
  2. Electrolytic in the feedback loop
  3. El34 PP Vs. El34 PSE
  4. RIAA Phono Amp Design
  5. Matching resistors to 1% or Better
  6. Wirewound cathode resistor
  7. Tube Hybrid Amp.
  8. Nasty ground loop
  9. ECC88 Class B
  10. Old Tube Amp Servicer In Nj???
  11. Vg-k max
  12. Anyone used PT15 / VT104 ?
  13. rebuild a Musical Fidelity X-10D ??
  14. Transformer Building
  15. Identifying weird signal transformer
  16. 100watt mono blocks
  17. Resistor combination calculator - RESCALC
  18. Aikido choice of valves (or tubes, if you will)
  19. Pin 9 on 6n6P, 6H30, etc
  20. Croft Super Micro meets Acoustat TNT200
  21. tube mic preamp kit??
  22. The SACD Meets Tubes
  23. Useful Abbreviations
  24. One B+ for the both driver and output tube if they are identical?
  25. Fisher 500B Schematic Question
  26. SE Output Transfromers Question
  27. Amplifier Project
  28. Grid Stopper for parallel sides of dual triode
  29. centre tap or floating heaters?
  30. Converting 6.3V to 6.3VCT Quick questions
  31. Russian Nuvistors...Anyone tried them?
  32. 一台300bc胆机,大家给点意见,谢谢
  33. Australian Amp Manufacturers
  34. Old radio quick question re PS
  35. Kt90 Pse
  36. Velleman K4040 is Always Blowing Output Tubes
  37. looking for transformer with the following specs?
  38. 5686 amplifier schematic
  39. Heaters for cathodes with a large swing
  40. 6DJ8 as phase splitter.
  41. New driver for SE 2A3
  42. I磛e made a Mu stage with 6888 and 6C45...
  43. Quick urgent Help plz !
  44. Cheap SET Kit for UK
  45. How can I change bias 6H30pi tube
  46. DHT heater voltage
  47. Ok SY...You Win
  48. Input level required- PP KT88
  49. SE 6C33C-B ; preview of a new Baby
  50. 2A3 grid DC voltage
  51. Dyna ST70 experience bypassing input tubes
  52. [Theory] Amplifier efficiency
  53. Pentode Cascode CCS
  54. Noval Relay
  55. Where to buy 6A5G ?
  56. AC or grounded DC for heater?
  57. EM84 based VUmeter "lines" don't go to zero
  58. 'scoping tube amps
  59. Preferred operating points of small signal triodes
  60. Is the Nuvistor Better Than The 12B4 For A Line Stage
  61. audio research schematics
  62. Looking to put the entire (last edition) RCA and Sylvania books online
  63. 5693 as a phono preamp?
  64. Audible Illusions Dual Mono Preamplifier
  65. should the filaments be already hot before the B+ is applied or
  66. One Electron vs. Transcendar
  67. "Y" caps? current bleed?
  68. I made a 200W tube amp!
  69. Power amp kit for a complete newbie
  70. Confused, datasheet of 417A/5842
  71. Audio Amp Project
  72. Tube tester settings?
  73. Neutrik XLR for Umbilical
  74. Primary Impedance
  75. Need help for HV section Design
  76. power amp kit recommendations
  77. 6N6P vs 5687
  78. Triode spice models for Circuit maker
  79. My ARC D70 get trouble
  80. when using PSUD2, do you...
  81. Depression... and a plea for help!!!
  82. Weston 981 Type 3 schematic and parts list needed
  83. 3W 6C33B-C SE OTL schematics ready
  84. Batory tubes, anyone familiar with these?
  85. Musical Pre-amp topology needed. Interstages please apply!
  86. Tube power Amp matching with SAE Mark M pre amp and AR18 speaker or MS 25i
  87. PowerDrive Circuit for 805 (+ve grid bias)
  88. Alternate spice models
  89. Is this heater supply OK?
  90. Basic RC Value Question
  91. Hookup powersubwoofer to a tube receiver.
  92. Transformer question RE; connections on phono stage
  93. Rectifier Tubes Data - Quick Sheet
  94. Which cabling to use?
  95. Need 396A/6N3P/2C51/407A spice model
  96. Antek Toroidal Power Transformers
  97. HT stands for???
  98. Is it possible to hook up 6c33 plate in parallel
  99. Help eliminating hum
  100. Tube LTP CCS?
  101. Trancsendar Transformers
  102. Hafler/Keroes 6L6 UL
  103. hum
  104. Leads for ISCO PS?
  105. Negative Feedback Bogen CHB100
  106. TubeCad's Hybrid amp question
  107. Cathode bias resistor value for 6SN7?
  108. El84 2-Channel Mono Blocks
  109. Tube Design Books
  110. Interesting Williamson article..
  111. Locating Preamp Output Transformers
  112. Plate characteristics
  113. How do you finance A Great DIY Audio Amp?
  114. 808 Se
  115. Parafeed doubt
  116. A little research: old tube amps from the past
  117. RCA Victor stereo cabinet amp-newb question
  118. Transformer temperature?
  119. switch in SPICE
  120. Using a standard pentode-tetrode as output "space-charge tube" any ideas-experiences?
  121. Tube testers which is the best?
  122. finished !!!
  123. Transformer Leg Connection Question
  124. simple ccs under 5-10mA ?
  125. Curcio Sarah Phono stage: opinions?
  126. suggest a KT88 SE to build
  127. Transformer potting material??
  128. Jan E Veiset Mini EL84 pp
  129. Some questions on non common things
  130. basic question on plate curves
  131. Euro barrier strip palace
  132. ARC D90 needs new electrolytics
  133. 5763 Triode Strapped
  134. Recommend me some transformers for a PP EL84
  135. grid LED bias?
  136. Help on tube socket
  137. Taking CFB to the extremes...?
  138. Output section impedance change query
  139. Tube Suggestions
  140. 82 Popped
  141. OPT Project for EL84 SE
  142. Interesting eBay "listing" for tube amp
  143. How to chose the right choke
  144. Eco warrior thinking of jumping ship !!!
  145. HELP! Cathode bypass caps keep going...
  146. Best Operating point for a 2A3?
  147. Need help with preamp
  148. Best place to buy valves and components?
  149. Replacing cathode resistors of Aikido 1st stage (or other SRPP circuit) with chokes
  150. Circuit calculations
  151. Finally going to give my TVC/active preamp a real home...
  152. Suggestion on the input transformer for tube preamp
  153. sylvania & GE tubes
  154. SE Amplifier
  155. "fisss" on the 6C33C-pp
  156. Best price for tube output and power transformers ?
  157. What kind of output transformer?
  158. transformer
  159. 20W PP Choke PSU Question
  160. Regulated B+ supplies (using tubes)
  161. Confused by the numbers
  162. Feedback on Thorsten's legacy "universal dht" amp
  163. Are there techniques for triode-strapping on the fly?
  164. The best bias point for KT88
  165. All tube CCS
  166. GU50 SE Amplifier class A , with 6SN7 Full construction details
  167. 50L6GT & 6L6GT sounds ??
  168. Especially for Tubelab: 845 amp 2.0
  169. Powerdrive
  170. Filament voltage and affect on Rp
  171. Tube pre-amplifier PSU
  172. Help with a cathode coupled pentode driver?
  173. Amp that has the biggest number of irons
  174. 12AX7A replacement
  175. Bogen CHB-10A Conversion, need help and advice
  176. Who said it was a good idea to try pentode!
  177. Input level
  178. 6V6GT
  179. 6AR6
  180. Any TCJ Push-Pull Calculator users?
  181. 211 Push pull operation points
  182. Edcor CXSE25-8-4K vs Hammond 1628SEA?
  183. 50W KT88 PP w/ NFB on Bonavolta
  184. Looking for nuvistor pre-amp preamp schematic please. 6CW4?
  185. BELL 3030 Amplifier
  186. Diy Paradise!
  187. Another PP 6B4G
  188. How to get a buffer with overdrive from a 12AX7 ?
  189. Pulsating Glow
  190. Question on using glow tubes (v-regs)
  191. Eliminating the OPT: impedance matching
  192. KT88 and push-pull ultra-linear
  193. Positronic Tubes
  194. Paint steel chassis with the "aluminum paint" used on wire fence?
  195. Best bias for 6cg7
  196. 829B Based Amp
  197. slight hum still haunting me
  198. CCS bias question
  199. Can't get solder to stick
  200. EL84 amp plus subwoofers? STUPID? OR NOT?
  201. Johan Potgieter
  202. parallel sections
  203. PL504/EL84 SE vs parafeed
  204. [help] Look for McIntosh MI-200 Circuit diagram
  205. My experience: the cheap punch set VS Greenlee punch
  206. 6V6GT SE schematic -need!!!
  207. What's the deal with Broskie's iPod buddy?
  208. a quiz about AC power
  209. Beard P100 Amplifier
  210. Quick identification question
  211. Some more RIAA questions
  212. what to do?
  213. A suspect EL34
  214. Best way of reducing heater voltage?
  215. Musical Instrument tube amp part suppliers
  216. tubelab
  217. My first power amp
  218. El34 SE pentode
  219. All Electron Tubes Manufacturers
  220. Mu stage driver
  221. two questions on Parafeed amplifier
  222. 6AU5GT
  223. Connection advice
  224. 'Tube'-ing a reel-to-reel player.
  225. EL34 make up by PCB
  226. wanted RIAA schematic
  227. What is the best software to create tube schematic
  228. Soft clipping acceptable?
  229. help for this amp
  230. Pentode PP amp for comments, please
  231. 966A rectifier
  232. 938 power triode
  233. PL36 PP Amplifier 22W Full construction details
  234. Quick question about the output of my amp
  235. Sansui Transformers from Tokyo Electronic Industrial Co. LTD.
  236. An "All American" tube Project
  237. Aikido and output transformer
  238. Why are Hammond SE OPTs dissed? Heavier than the competition...
  239. Driver stage headroom
  240. Help me before I deal hot electric death to myself (PS question)
  241. AVO CT-160
  242. Two cathode resistor bypass questions
  243. What do you guys think?
  244. Antique Sound Lab Aq1003
  245. Audiomaster integrated (Valve) amp
  246. PP Amp using 811A
  247. Replacing ECC83 in Leak Stereo50 with ECC808
  248. 6N30/6H30 Datasheet
  249. Equivalents to 6888
  250. Input voltage

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