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  1. Polytone Mini-brute II
  2. New 6N6P linestage
  3. Split supply, arrangement of gain and phase splitter tubes
  4. New Hybrid Amp with multiple inputs: Little Singer H-30A
  5. Help with my Transformer - vibrating
  6. Quick transformer question
  7. Need for twin 5U4GB rectifiers in baldwin organ amplifier?
  8. Oddwatt / Oddblock Builder's Thread
  9. Tube output stage for Buffalo Saber 32-bit DAC?
  10. Silvertone Multiplex Stereo Model No. 4092 Questions
  11. 6SJ7(6J8) + 6v6 (6P6S) SE
  12. Wavebourn Tower-III High-end hybrid amp
  13. Question - Closest Russian Analog of 12BH7A
  14. Help understanding the PowerDrive circuit anaylsis
  15. Aikido pre
  16. Fixed bias: Pots near supply or tubes?
  17. Oh, those 12AU7s again...
  18. Plitron LOW Power OPT...
  19. Has anyone used The Guiguang 300B?
  20. anyone have any el86 circuits laying around?
  21. ok, power supply question, 230v - 117v conversion
  22. Big lot of tubes purchased this morning
  23. Tamura HM-1
  24. Tube Amp Design Question...
  25. Cathode Bias questions
  26. Tube Hybrid Shunt Regulator ... will this even work?
  27. Broskie regulator oscillates
  28. Yushang-Audio Classic 16.6
  29. Tube PreAmplifier Kit suggestions..
  30. Sourcing Chassis Access Panels
  31. Cavalli OCL Buffer
  32. wooohooo! Three Rowe AMI amps for $200NZD!
  33. Quick Volume pot question
  34. Basic choke quality/sonic benefit questions
  35. Tube rectifiers for Dummies
  36. help on a SE 4 channel tube amp for auto?
  37. Audio Output Transformers
  38. K-502 Help
  39. First post, first project RH84
  40. Source for tube cages?
  41. Audio Transformers - Help
  42. Gran Tenor
  43. Toroidal Output Tranformers
  44. Cathode Follower confusion
  45. Tube newbie problem
  46. Replacement of KT88's. No mods' necessary?
  47. Phase splitter types
  48. Yaqin VK-2100 mods
  49. Heptode oscillators
  50. tube amp repair in DFW area
  51. A novice scope user - measuring noise?
  52. Multifilar winding
  53. Measuring Hi-Fi Amplifiers
  54. Help with 30A5 tube amp schematic
  55. 6SN7 operating points input gain stage and concertina
  56. looking for pentodes for scope deflection
  57. Cary 845 schematics
  58. Power Transformer 110/230V Windings Question
  59. OPT Voltage spike protection with zeners
  60. IRIS OTL info
  61. ping yves
  62. Filters
  63. 2X2 as amplifier rectifier
  64. SPMSU for heater supplies
  65. Shipping Tube Gear
  66. Amplifier squeel at zero volume
  67. mercury rectifier for electrostatic bias
  68. My little coupling-cap-test in a UL-70W-Amp
  69. Electra-Print 300BDRD
  70. K-502... upgrading the OPT's with Hammonds
  71. Tube eq or tone control - how to design it?
  72. Help, strange glowing in KT88
  73. Need opinions about this tube circuit
  74. Custom designed transformer for Andrea Ciuffoli 6c33c OTL AMP....
  75. Max current for Edcore GXSE10-8-2.5K
  76. And for the man who has everything....
  77. 1J6G recommended operating point?
  78. DHT bias and filament supply in one?
  79. 3d amp modelling (for solidworks)
  80. RSC Stereo Ten.
  81. Help - noisy phono stage
  82. 2A3 Max Grid Current Rating?
  83. Futterman style 6AS7 OTL with other tubes
  84. Low/Mid-Watt Amps
  85. Calling all builders of the Swenson/Pimm HV Reg
  86. AZ1 problem: broken metal part
  87. More Grunt from Aikido Needed to drive PL509's
  88. Correct OPT and other adjustments on old Bogen amp
  89. Ebl 21 Se Amplifier
  90. OT primary impedance calculation
  91. Akai M5?
  92. Identify the DHT
  93. Fountek Altitude 3500, any opinions?
  94. 31 tube in output
  95. dynaco system- volume remains
  96. Left channel BAD in stereo! HELP please! It's my first tube set
  97. OPT with power transfrormer core
  98. 300b dpa
  99. IV single stage inverting Feedback Amp
  100. TechTubes - The return of Blackburn
  101. Tradeoffs in analog circuit design, and so on...
  102. Has anyone Received The new Techtubes yet?
  103. 6P3S-E in place of 6V6
  104. EL34, KT88, High Voltage?, VTL..
  105. 100W 6L6 amp sounds harsh at high Volume
  106. Need help: amp blowing fuses
  107. Best voltage reference device for a cascode BJT CCS?
  108. Tube power amp noise problem
  109. tube oscillator help.
  110. Finally have some big chokes, how would you use them?
  111. Tube amplifier
  112. 12AX7 heater filament resistance
  113. Choke input LC chain questions..Q?, minload?
  114. LED bias for 12ax7 oscillator
  115. Yaqin VK-2100 hybrid running 4 ohm speakers
  116. VR shunt regulator or RC filter
  117. Screen Mode Mesh Plate?
  118. EL34 simple push pull class B : why 100W ?
  119. Scored Some Bendix 5992
  120. Tube Substitutions Online ???
  121. Tube Phono Preamp PCB Ebay? are these any good
  122. Testing an EL84 as a 6V6
  123. Low Voltage (~16-20V) Tube
  124. Cathodyne Questions
  125. 6922 for a Noob
  126. Cathodyne Phase splitter simulation problem?
  127. How would you improve this EL84 SE circuit?
  128. Power transformer HT/B+ voltages
  129. Help with cathode follower circuit
  130. RH84 bias change whith different el84 is use
  131. No more power transformers?
  132. K-502 Filament supply (or K-12M)
  133. **LOL** Chinese surround sound amp identification
  134. MOSFET for power drive for low powered 845
  135. Aikido line & phono Guru's advice for a newbie pls
  136. Need Tube kits of above 75W Single Ended Class A amp
  137. First Project: 300B SET Monoblocks
  138. Where do you get those cool layout diagrams?
  139. Power-On Time Delay Circuit
  140. GM-70 Build Issues
  141. Blue glass inside tubes
  142. Ruby Tuesdays
  143. Wich valve to start?
  144. Tubes that have round/curved plates. . .
  145. Calculating current capacity?
  146. AKAI 1710W R2R, OPT Question?
  147. Ringed Tube Grills / Guards ?
  148. Recommend me a warm, smooth sounding 6922, 6DJ8, ECC88 or equivalent
  149. Please help identify this tube - Shuguang 6922?
  150. Dedicated 6.3v filament transformer 240v primary
  151. can someone check this thread please
  152. Amp refurbishing question.....
  153. Tube mounting position
  154. 6N6P - recommended operating point
  155. Interstage transformer questions
  156. Help identifying resistor value
  157. New Audio Note M10
  158. K501 vs K12M
  159. what are these (i hope cheap) resistors ?
  160. Potentiometer value for 6SL7 input
  161. PSU Designer II question
  162. Lost Thread-High VOltage Regulated Power Supply
  163. 6B4G schematic - opinions please!!
  164. Plate current Question
  165. rh84 bias question.
  166. On/off LED wiring question
  167. Heater to Cathode max voltage specs, including signal swings?
  168. Any 9- pin rectifier tubes with separate cathodes?
  169. 6G-A4 anyone have a datasheet?
  170. Bias Protection Resistors in DC Coupled Amp
  171. EL84 push pull
  172. pcb printing companies
  173. Help! tube amp burnt?
  174. 43% UL connections
  175. Help with CATHODE resistor value on 6BM8 PP Amp
  176. SE EL34 schematic HELP: from two 6SL7's to One?
  177. no choke and transformers ratings
  178. Value of Resistors of EL34
  179. Power Transformer spec questions. Will it work or burn up?
  180. These Hong Kong amps have me bummed
  181. Looking for a cheap dual pentode
  182. Building a 12B4 Line Stage
  183. Speaker sounds blown...but isn't
  184. Static noise in K-16LS
  185. Scratchy clicky noise coming from homemade 6L6 tube amp
  186. Rowe AMI jukebox amp
  187. Does this power supply make any sense to you?
  188. Zener Diode Question
  189. 829B as LTP?
  190. Need a little help with Aikido 6n1p/6n6p
  191. Power switch location..
  192. Mini Millet (starving student) and iPod??
  193. valve preamp for quad 303
  194. Paging Wavebourn - article on Russian caps...
  195. I'm about to drive a stake thru the heart of my Aikido linestage
  196. questions on Mikael Abdellah circuit optimized for EL34 triode operation
  197. Model 16LS Stereo Integrated Tube Amplifier
  198. hum on pre-amp when volume is turned up
  199. 813 RCA amplifier - 25w, class A1, single ended,2 tubes,Rout~1ohm
  200. Interesting circuit, filter question.
  201. Choke Voltage ratings
  202. Major amp circuit redesign- need some expert advice
  203. Daft Hybrid Amp
  204. 6n18-v tube amp
  205. Old big/long plate 12AX7's & 12AT7's
  206. in progress
  207. A good tube amplifier power supply
  208. Anyone compared electra-print SE:PP interstages to electra-print PSA-2 autoformers
  209. El34 Se
  210. Question on choke
  211. Looking for beter EL34/6CA7 tubes for C-J MV55 amp
  212. SET tube replacement
  213. VALVOLOZZO triode amp with toroids output trafo...help me
  214. Old amp kit making noise and its getting OLD.
  215. Another Tube pre query !
  216. do 6h30 glow at the top only
  217. canadian source for triad choke?
  218. Fork vs. Sleeve Terminal Octal Sockets.
  219. Step down grid choke vs. interstage transformer
  220. Who knows James 6123HS parameters? Or where to ask
  221. Advantage of a FET-BJT CCS vs BJT only
  222. Trouble choke loading tube in regulated supply
  223. Fixed Bias adjustment
  224. web resource for tube pricing?
  225. Need help on Kenwood KR 7070
  226. 110v or 220v, how can you tell?
  227. Tubes Down Under...
  228. To anyone using 808s
  229. Grounded power supply cord on a transformerless amp ?
  230. PP KT88 Mono blocks?
  231. Looking for 6.3V 1A ccs heater supply for dht
  232. testing for the ratios on old opt's
  233. Any Transformer Winders?
  234. Output trans plate load question 5687 vs 5965
  235. KT88 triode strapped question
  236. 6528/8080 Triode - NOS Only ???
  237. Opinions gratefully recieved.
  238. Wiring Power Transformer in Parallel
  239. Is there a best location for a volume control?
  240. Help on EL84 / ecc83 SE project -very low volume
  241. 4E27 Triode connection SPICE model
  242. 300B driving 845
  243. Breaking in your tubes?
  244. 6SN7 equivalents in B9A
  245. Figuring out how many watts I need
  246. How do I tell whether a different replacement output transformer will be ok?
  247. OPT linestage question
  248. 6AS7 preamp buffer
  249. 5u4g input capacitor
  250. Chassis metal advantages/disadvantages?

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