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  1. Multifilar winding
  2. Measuring Hi-Fi Amplifiers
  3. Help with 30A5 tube amp schematic
  4. simple se troubleshooting
  5. 6SN7 operating points input gain stage and concertina
  6. looking for pentodes for scope deflection
  7. Cary 845 schematics
  8. newbie simple SE issue
  9. Power Transformer 110/230V Windings Question
  10. OPT Voltage spike protection with zeners
  11. IRIS OTL info
  12. Precise 111 tube tester - missing tubes
  13. ping yves
  14. Filters
  15. 2X2 as amplifier rectifier
  16. SPMSU for heater supplies
  17. Shipping Tube Gear
  18. Amplifier squeel at zero volume
  19. mercury rectifier for electrostatic bias
  20. My little coupling-cap-test in a UL-70W-Amp
  21. Electra-Print 300BDRD
  22. K-502... upgrading the OPT's with Hammonds
  23. Tube eq or tone control - how to design it?
  24. Help, strange glowing in KT88
  25. Need opinions about this tube circuit
  26. Custom designed transformer for Andrea Ciuffoli 6c33c OTL AMP....
  27. Max current for Edcore GXSE10-8-2.5K
  28. And for the man who has everything....
  29. 1J6G recommended operating point?
  30. DHT bias and filament supply in one?
  31. Tubelab Simple SE Sound Quality
  32. 3d amp modelling (for solidworks)
  33. RSC Stereo Ten.
  34. Weird Bias on Simple SE
  35. Help - noisy phono stage
  36. 2A3 Max Grid Current Rating?
  37. Futterman style 6AS7 OTL with other tubes
  38. Low/Mid-Watt Amps
  39. Calling all builders of the Swenson/Pimm HV Reg
  40. AZ1 problem: broken metal part
  41. More Grunt from Aikido Needed to drive PL509's
  42. Correct OPT and other adjustments on old Bogen amp
  43. Ebl 21 Se Amplifier
  44. OT primary impedance calculation
  45. Akai M5?
  46. Identify the DHT
  47. Fountek Altitude 3500, any opinions?
  48. 31 tube in output
  49. dynaco system- volume remains
  50. Left channel BAD in stereo! HELP please! It's my first tube set
  51. OPT with power transfrormer core
  52. 300b dpa
  53. IV single stage inverting Feedback Amp
  54. TechTubes - The return of Blackburn
  55. simple se how to wire a auxiliary cap
  56. Tradeoffs in analog circuit design, and so on...
  57. Has anyone Received The new Techtubes yet?
  58. 6P3S-E in place of 6V6
  59. EL34, KT88, High Voltage?, VTL..
  60. 100W 6L6 amp sounds harsh at high Volume
  61. Hickok 533 / 600 settings for 6GM8 / ECC86
  62. Need help: amp blowing fuses
  63. Best voltage reference device for a cascode BJT CCS?
  64. Tube power amp noise problem
  65. tube oscillator help.
  66. Finally have some big chokes, how would you use them?
  67. Tube amplifier
  68. Mesa Boogie bass amp quiet
  69. 12AX7 heater filament resistance
  70. Choke input LC chain questions..Q?, minload?
  71. LED bias for 12ax7 oscillator
  72. Yaqin VK-2100 hybrid running 4 ohm speakers
  73. VR shunt regulator or RC filter
  74. Screen Mode Mesh Plate?
  75. EL34 simple push pull class B : why 100W ?
  76. Scored Some Bendix 5992
  77. Tube Substitutions Online ???
  78. Resistor pack for tube amp
  79. Tube Phono Preamp PCB Ebay? are these any good
  80. Testing an EL84 as a 6V6
  81. Low Voltage (~16-20V) Tube
  82. Basic Oscilloscope question
  83. Cathodyne Questions
  84. 6922 for a Noob
  85. Cathodyne Phase splitter simulation problem?
  86. How would you improve this EL84 SE circuit?
  87. Power transformer HT/B+ voltages
  88. Help with cathode follower circuit
  89. RH84 bias change whith different el84 is use
  90. No more power transformers?
  91. K-502 Filament supply (or K-12M)
  92. **LOL** Chinese surround sound amp identification
  93. Tubelab SE driver gain
  94. MOSFET for power drive for low powered 845
  95. Aikido line & phono Guru's advice for a newbie pls
  96. Need Tube kits of above 75W Single Ended Class A amp
  97. First Project: 300B SET Monoblocks
  98. Where do you get those cool layout diagrams?
  99. Simple SE grounding -- metal spacers/standoffs?
  100. My Simple SE via Akihabara
  101. Power-On Time Delay Circuit
  102. GM-70 Build Issues
  103. Blue glass inside tubes
  104. Ruby Tuesdays
  105. Wich valve to start?
  106. Tubes that have round/curved plates. . .
  107. Calculating current capacity?
  108. AKAI 1710W R2R, OPT Question?
  109. Ringed Tube Grills / Guards ?
  110. Recommend me a warm, smooth sounding 6922, 6DJ8, ECC88 or equivalent
  111. Please help identify this tube - Shuguang 6922?
  112. Dedicated 6.3v filament transformer 240v primary
  113. can someone check this thread please
  114. Amp refurbishing question.....
  115. Tube mounting position
  116. 6N6P - recommended operating point
  117. Interstage transformer questions
  118. Help identifying resistor value
  119. New Audio Note M10
  120. K501 vs K12M
  121. what are these (i hope cheap) resistors ?
  122. Potentiometer value for 6SL7 input
  123. PSU Designer II question
  124. Lost Thread-High VOltage Regulated Power Supply
  125. 6B4G schematic - opinions please!!
  126. Plate current Question
  127. rh84 bias question.
  128. On/off LED wiring question
  129. Stabilized wood
  130. Heater to Cathode max voltage specs, including signal swings?
  131. Any 9- pin rectifier tubes with separate cathodes?
  132. Final checkout problems with Tubelab SE
  133. 6G-A4 anyone have a datasheet?
  134. Bias Protection Resistors in DC Coupled Amp
  135. EL84 push pull
  136. pcb printing companies
  137. Help! tube amp burnt?
  138. 43% UL connections
  139. Help with CATHODE resistor value on 6BM8 PP Amp
  140. SE EL34 schematic HELP: from two 6SL7's to One?
  141. no choke and transformers ratings
  142. Value of Resistors of EL34
  143. bass preamp redux
  144. Power Transformer spec questions. Will it work or burn up?
  145. These Hong Kong amps have me bummed
  146. Looking for a cheap dual pentode
  147. Adding panel meters to Simple SE?
  148. Building a 12B4 Line Stage
  149. Speaker sounds blown...but isn't
  150. Static noise in K-16LS
  151. Scratchy clicky noise coming from homemade 6L6 tube amp
  152. Rowe AMI jukebox amp
  153. Does this power supply make any sense to you?
  154. Zener Diode Question
  155. 829B as LTP?
  156. Need a little help with Aikido 6n1p/6n6p
  157. Power switch location..
  158. Mini Millet (starving student) and iPod??
  159. valve preamp for quad 303
  160. Paging Wavebourn - article on Russian caps...
  161. I'm about to drive a stake thru the heart of my Aikido linestage
  162. questions on Mikael Abdellah circuit optimized for EL34 triode operation
  163. Model 16LS Stereo Integrated Tube Amplifier
  164. hum on pre-amp when volume is turned up
  165. 813 RCA amplifier - 25w, class A1, single ended,2 tubes,Rout~1ohm
  166. Interesting circuit, filter question.
  167. Choke Voltage ratings
  168. Hole drills
  169. Major amp circuit redesign- need some expert advice
  170. Daft Hybrid Amp
  171. 6n18-v tube amp
  172. Old big/long plate 12AX7's & 12AT7's
  173. in progress
  174. JTM45 clone
  175. A good tube amplifier power supply
  176. Anyone compared electra-print SE:PP interstages to electra-print PSA-2 autoformers
  177. El34 Se
  178. Question on choke
  179. Simple SE output transformer: James or Edcor?
  180. Looking for beter EL34/6CA7 tubes for C-J MV55 amp
  181. SET tube replacement
  182. Some kind of buffer/preamp for my SS guitar amp fx loop
  183. VALVOLOZZO triode amp with toroids output trafo...help me
  184. Old amp kit making noise and its getting OLD.
  185. Another Tube pre query !
  186. Simple SE aux capacitor
  187. do 6h30 glow at the top only
  188. canadian source for triad choke?
  189. Fork vs. Sleeve Terminal Octal Sockets.
  190. Step down grid choke vs. interstage transformer
  191. Who knows James 6123HS parameters? Or where to ask
  192. Advantage of a FET-BJT CCS vs BJT only
  193. Question - PCB Design with Multisim/Ultiboard
  194. Trouble choke loading tube in regulated supply
  195. PSUD newbie: modeling Tubelab SE
  196. Bassman Schematic Alterations
  197. Fixed Bias adjustment
  198. web resource for tube pricing?
  199. Need help on Kenwood KR 7070
  200. 110v or 220v, how can you tell?
  201. Calling UK builders Simple SE, Pre & Phono advice
  202. Stoked about new volume control for my Simple SE
  203. Tubes Down Under...
  204. To anyone using 808s
  205. Grounded power supply cord on a transformerless amp ?
  206. Documenting SimpleSE FRED Problem
  207. PP KT88 Mono blocks?
  208. Looking for 6.3V 1A ccs heater supply for dht
  209. testing for the ratios on old opt's
  210. Any Transformer Winders?
  211. Output trans plate load question 5687 vs 5965
  212. KT88 triode strapped question
  213. 6528/8080 Triode - NOS Only ???
  214. Opinions gratefully recieved.
  215. Wiring Power Transformer in Parallel
  216. Is there a best location for a volume control?
  217. bass guitar preamp
  218. P2P vs PCB
  219. Help on EL84 / ecc83 SE project -very low volume
  220. 4E27 Triode connection SPICE model
  221. 300B driving 845
  222. Breaking in your tubes?
  223. 6SN7 equivalents in B9A
  224. Figuring out how many watts I need
  225. How do I tell whether a different replacement output transformer will be ok?
  226. OPT linestage question
  227. 6AS7 preamp buffer
  228. Where to put the MV ?
  229. 5u4g input capacitor
  230. Chassis metal advantages/disadvantages?
  231. Experience please: Tung-Sol 6L6GC STR
  232. Transformer winding resistances
  233. Capacitor Voltage Rating Question
  234. Oh my where to begin!? PTP related question.
  235. tube bayonet pin gone.
  236. Attn: Glass_painter - Pioneer SM-83 Transformers Dissected
  237. Please help ID this DIY tube monoblocks
  238. Amp thinks it's a receiver ??
  239. Anyone remember heathkit s99?
  240. Blue Voodoo Solid State Rects to Tube Rects?
  241. Renovation of fifty years old tube amplifier
  242. Big Boss: a simple and basic el84 PP amp in progress
  243. Line Stage for Mikael SE KT88
  244. DIY tube guitar amp oscillating, please help!
  245. Philips EL3536
  246. Tube Tester's
  247. Counterpoint SA-5000 P.S.U part identification needed
  248. 6GU7 in an Aikido?
  249. suggest about 9002/vt202 preamp please
  250. 7591a Alternatives

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