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

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