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  1. Low/Mid-Watt Amps
  2. Calling all builders of the Swenson/Pimm HV Reg
  3. AZ1 problem: broken metal part
  4. More Grunt from Aikido Needed to drive PL509's
  5. Correct OPT and other adjustments on old Bogen amp
  6. Ebl 21 Se Amplifier
  7. OT primary impedance calculation
  8. Akai M5?
  9. Identify the DHT
  10. Fountek Altitude 3500, any opinions?
  11. 31 tube in output
  12. dynaco system- volume remains
  13. Left channel BAD in stereo! HELP please! It's my first tube set
  14. OPT with power transfrormer core
  15. 300b dpa
  16. IV single stage inverting Feedback Amp
  17. TechTubes - The return of Blackburn
  18. simple se how to wire a auxiliary cap
  19. Tradeoffs in analog circuit design, and so on...
  20. Has anyone Received The new Techtubes yet?
  21. 6P3S-E in place of 6V6
  22. EL34, KT88, High Voltage?, VTL..
  23. 100W 6L6 amp sounds harsh at high Volume
  24. Hickok 533 / 600 settings for 6GM8 / ECC86
  25. Need help: amp blowing fuses
  26. Best voltage reference device for a cascode BJT CCS?
  27. Tube power amp noise problem
  28. tube oscillator help.
  29. Finally have some big chokes, how would you use them?
  30. Tube amplifier
  31. Mesa Boogie bass amp quiet
  32. 12AX7 heater filament resistance
  33. Choke input LC chain questions..Q?, minload?
  34. LED bias for 12ax7 oscillator
  35. Yaqin VK-2100 hybrid running 4 ohm speakers
  36. VR shunt regulator or RC filter
  37. Screen Mode Mesh Plate?
  38. EL34 simple push pull class B : why 100W ?
  39. Scored Some Bendix 5992
  40. Tube Substitutions Online ???
  41. Resistor pack for tube amp
  42. Tube Phono Preamp PCB Ebay? are these any good
  43. Testing an EL84 as a 6V6
  44. Low Voltage (~16-20V) Tube
  45. Basic Oscilloscope question
  46. Cathodyne Questions
  47. 6922 for a Noob
  48. Cathodyne Phase splitter simulation problem?
  49. How would you improve this EL84 SE circuit?
  50. Power transformer HT/B+ voltages
  51. Help with cathode follower circuit
  52. RH84 bias change whith different el84 is use
  53. No more power transformers?
  54. K-502 Filament supply (or K-12M)
  55. **LOL** Chinese surround sound amp identification
  56. Tubelab SE driver gain
  57. MOSFET for power drive for low powered 845
  58. Aikido line & phono Guru's advice for a newbie pls
  59. Need Tube kits of above 75W Single Ended Class A amp
  60. First Project: 300B SET Monoblocks
  61. Where do you get those cool layout diagrams?
  62. Simple SE grounding -- metal spacers/standoffs?
  63. My Simple SE via Akihabara
  64. Power-On Time Delay Circuit
  65. GM-70 Build Issues
  66. Blue glass inside tubes
  67. Ruby Tuesdays
  68. Wich valve to start?
  69. Tubes that have round/curved plates. . .
  70. Calculating current capacity?
  71. AKAI 1710W R2R, OPT Question?
  72. Ringed Tube Grills / Guards ?
  73. Recommend me a warm, smooth sounding 6922, 6DJ8, ECC88 or equivalent
  74. Please help identify this tube - Shuguang 6922?
  75. Dedicated 6.3v filament transformer 240v primary
  76. can someone check this thread please
  77. Amp refurbishing question.....
  78. Tube mounting position
  79. 6N6P - recommended operating point
  80. Interstage transformer questions
  81. Help identifying resistor value
  82. New Audio Note M10
  83. K501 vs K12M
  84. what are these (i hope cheap) resistors ?
  85. Potentiometer value for 6SL7 input
  86. PSU Designer II question
  87. Lost Thread-High VOltage Regulated Power Supply
  88. 6B4G schematic - opinions please!!
  89. Plate current Question
  90. rh84 bias question.
  91. On/off LED wiring question
  92. Stabilized wood
  93. Heater to Cathode max voltage specs, including signal swings?
  94. Any 9- pin rectifier tubes with separate cathodes?
  95. Final checkout problems with Tubelab SE
  96. 6G-A4 anyone have a datasheet?
  97. Bias Protection Resistors in DC Coupled Amp
  98. EL84 push pull
  99. pcb printing companies
  100. Help! tube amp burnt?
  101. 43% UL connections
  102. Help with CATHODE resistor value on 6BM8 PP Amp
  103. SE EL34 schematic HELP: from two 6SL7's to One?
  104. no choke and transformers ratings
  105. Value of Resistors of EL34
  106. bass preamp redux
  107. Power Transformer spec questions. Will it work or burn up?
  108. These Hong Kong amps have me bummed
  109. Looking for a cheap dual pentode
  110. Adding panel meters to Simple SE?
  111. Building a 12B4 Line Stage
  112. Speaker sounds blown...but isn't
  113. Static noise in K-16LS
  114. Scratchy clicky noise coming from homemade 6L6 tube amp
  115. Rowe AMI jukebox amp
  116. Does this power supply make any sense to you?
  117. Zener Diode Question
  118. 829B as LTP?
  119. Need a little help with Aikido 6n1p/6n6p
  120. Power switch location..
  121. Mini Millet (starving student) and iPod??
  122. valve preamp for quad 303
  123. Paging Wavebourn - article on Russian caps...
  124. I'm about to drive a stake thru the heart of my Aikido linestage
  125. questions on Mikael Abdellah circuit optimized for EL34 triode operation
  126. Model 16LS Stereo Integrated Tube Amplifier
  127. hum on pre-amp when volume is turned up
  128. 813 RCA amplifier - 25w, class A1, single ended,2 tubes,Rout~1ohm
  129. Interesting circuit, filter question.
  130. Choke Voltage ratings
  131. Hole drills
  132. Major amp circuit redesign- need some expert advice
  133. Daft Hybrid Amp
  134. 6n18-v tube amp
  135. Old big/long plate 12AX7's & 12AT7's
  136. in progress
  137. JTM45 clone
  138. A good tube amplifier power supply
  139. Anyone compared electra-print SE:PP interstages to electra-print PSA-2 autoformers
  140. El34 Se
  141. Question on choke
  142. Simple SE output transformer: James or Edcor?
  143. Looking for beter EL34/6CA7 tubes for C-J MV55 amp
  144. SET tube replacement
  145. Some kind of buffer/preamp for my SS guitar amp fx loop
  146. VALVOLOZZO triode amp with toroids output trafo...help me
  147. Old amp kit making noise and its getting OLD.
  148. Another Tube pre query !
  149. Simple SE aux capacitor
  150. do 6h30 glow at the top only
  151. canadian source for triad choke?
  152. Fork vs. Sleeve Terminal Octal Sockets.
  153. Step down grid choke vs. interstage transformer
  154. Who knows James 6123HS parameters? Or where to ask
  155. Advantage of a FET-BJT CCS vs BJT only
  156. Question - PCB Design with Multisim/Ultiboard
  157. Trouble choke loading tube in regulated supply
  158. PSUD newbie: modeling Tubelab SE
  159. Bassman Schematic Alterations
  160. Fixed Bias adjustment
  161. web resource for tube pricing?
  162. Need help on Kenwood KR 7070
  163. 110v or 220v, how can you tell?
  164. Calling UK builders Simple SE, Pre & Phono advice
  165. Stoked about new volume control for my Simple SE
  166. Tubes Down Under...
  167. To anyone using 808s
  168. Grounded power supply cord on a transformerless amp ?
  169. Documenting SimpleSE FRED Problem
  170. PP KT88 Mono blocks?
  171. Looking for 6.3V 1A ccs heater supply for dht
  172. testing for the ratios on old opt's
  173. Any Transformer Winders?
  174. Output trans plate load question 5687 vs 5965
  175. KT88 triode strapped question
  176. 6528/8080 Triode - NOS Only ???
  177. Opinions gratefully recieved.
  178. Wiring Power Transformer in Parallel
  179. Is there a best location for a volume control?
  180. bass guitar preamp
  181. P2P vs PCB
  182. Help on EL84 / ecc83 SE project -very low volume
  183. 4E27 Triode connection SPICE model
  184. 300B driving 845
  185. Breaking in your tubes?
  186. 6SN7 equivalents in B9A
  187. Figuring out how many watts I need
  188. How do I tell whether a different replacement output transformer will be ok?
  189. OPT linestage question
  190. 6AS7 preamp buffer
  191. Where to put the MV ?
  192. 5u4g input capacitor
  193. Chassis metal advantages/disadvantages?
  194. Experience please: Tung-Sol 6L6GC STR
  195. Transformer winding resistances
  196. Capacitor Voltage Rating Question
  197. Oh my where to begin!? PTP related question.
  198. tube bayonet pin gone.
  199. Attn: Glass_painter - Pioneer SM-83 Transformers Dissected
  200. Please help ID this DIY tube monoblocks
  201. Amp thinks it's a receiver ??
  202. Anyone remember heathkit s99?
  203. Blue Voodoo Solid State Rects to Tube Rects?
  204. Renovation of fifty years old tube amplifier
  205. Big Boss: a simple and basic el84 PP amp in progress
  206. Line Stage for Mikael SE KT88
  207. DIY tube guitar amp oscillating, please help!
  208. Philips EL3536
  209. Tube Tester's
  210. Counterpoint SA-5000 P.S.U part identification needed
  211. 6GU7 in an Aikido?
  212. suggest about 9002/vt202 preamp please
  213. 7591a Alternatives
  214. tube rectifier plug in s-s replacement
  215. Oscillation in tube amps
  216. simple se cathode resistor question
  217. 6GT5 audio amp?
  218. How can a resistor "sound" good?
  219. Pin numbering, viewed from bottom or top?
  220. The Hybrid Class A amplifier
  221. 485V Regulated Power Supply
  222. 0B3 Glows Orange
  223. New Reissue tubes...Good/Bad???
  224. PP amp design , your thoughts please.
  225. Aikido + Phono section preamp
  226. Newcomb el84 amp
  227. Any Australians want to share shipping for valves from ESRC?
  228. 5718 Nuvistor ?
  229. Trimmer pot source?
  230. Pentode Miller Capacitance, and which spec value to use?
  231. Brother can you spare a preamp design?
  232. Reducing tremolo beating
  233. Russian tube equivelants
  234. Another question about russian tubes
  235. Why match tubes?
  236. My XPP OTL Headphoneamp
  237. Joining the Tubelab SE club
  238. Simple heater question
  239. Fender always taking care of tubes....
  240. Need small SET transformer (12B4)
  241. Red Hot 6L6GC
  242. How do these curves look?
  243. Why does lowering screen voltage reduce headroom?
  244. Class A2 Direct MOSFET Coupled SE
  245. Volume Surges Fender "The Twin" - transformer going?
  246. simple SE questions
  247. Best tubes for ~100w 1.9k p-p?
  248. Installing bleeding resistors
  249. Capacitor Comparison Conundrum
  250. Tubelab SE socket raise

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