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  1. Add rectifier tube to yaqin mc10l? What size is best?
  2. global negative feedback schematic
  3. Signal transformer question
  4. What speaker system for tube amplifier
  5. 39/44 Tube
  6. tube-aholics anonymous ?
  7. 12AX7 heaters from 9VAC transformer
  8. Cant stop Aikido Humming
  9. Question about potential transformer placement in K-12 Kit
  10. Extra pins on replacement potentiometer for K-12 tube kit?
  11. SRPP - issues understanding how to increase current
  12. ARC Power source+Marantz 7C(PCB edition)
  13. Repair and adjustment tips
  14. trimax output transformer TA2444
  15. anyone recognize this valve?
  16. Microphone Preamp design
  17. 6CM5 hi-fi amplifier
  18. Building an amp try #2
  19. Can the 6S33S/6C33C be mounted horizontally?
  20. A heptode question
  21. Looking for a 807 amp with 4 pairs of 807's
  22. pp output transformer miniblok2
  23. John Swenson's BDT preamp - finally!!
  24. Voice of Music console 816
  25. Steve Bench 1 tube reg in all glass
  26. Conn Caprice 427 needs new 12AU7 tubes—advice?
  27. Position of Iron in Can of HK Citation II Output Transformers
  28. Bottle size,does it matter in matched quads?
  29. Heater Pots?
  30. Current calculation from datasheet
  31. Any one ever seen this amp?
  32. Guiguang 300B for 300Beast.....
  33. FLEA PPP, all ecc99
  34. Well, it is time to start thinking about winter projects. GM70
  35. aghhh is my tube okay?
  36. Grid Bias provided by transformer secondary winding, what is this stuff about?
  37. Zener regulated supplies
  38. OPT fore drive ribbon speaker directly; why not ?
  39. van Dorn's Octode design - recommendations for a 10W/ch version
  40. Outrageous Speaker/Amplifier Idea
  41. Anyone ever made the EL84 P-P circuit referenced on the Tubecad Journal site?
  42. Cathode Follower ideas please.....
  43. Anyone used the NTE1866 VU LED driver?
  44. Any potential problems when using a combo potentiometer / power switch on a K-12 kit?
  45. Help needed understanding component values.
  46. Separate passive pre and monoblocks?
  47. My new diy site
  48. Valves and musical instruments
  49. My DC Darling
  50. Question - add LED power indicator to Aikido pre
  51. Colorful amps
  52. Aikido Cathode Follower
  53. Converting a dirty channel to clean?
  54. A few questions about transformer placement in an S5 K-12 tube amplifer
  55. Bogen AP30 and new member
  56. Echocord Super 62 Feedback at Low Levels?
  57. Direct Coupled 76/5687 linestage
  58. Be kind to your 5AR4 and input capacitor
  59. New Self-Powered ROHS compliant electronic device invented!
  60. Making my first hifi tube amp.
  61. Variation on Rodīs bias servo
  62. "No Light District" P-P amplifier
  63. What kind of tubes do i have?
  64. Single tube SE with EML-20B
  65. LED bias cathodyne
  66. Diagnosing hum???
  67. Posted tube microphone preamp design
  68. Finally put the Aikido in a proper chassis
  69. Tube Preamp / Headphone amp question...
  70. Phono Preamp
  71. Initial 'DQ5' testing
  72. Free Tube Amplifier Schematic Diagrams
  73. The Impressive Vetruvio GM70 SET amp.
  74. 6sn7 subminature??
  75. One channel louder than other
  76. phono amp question - adding input tx
  77. Ebay "clones" PCB
  78. Phase splitter and balance input
  79. At Last....First Build Complete...6V6/6SL7
  80. Amplifier input
  81. The Tube Maze
  82. Variable Harmonizer
  83. Vetruvio Audio; new competition for the Chinese?
  84. Transmitting tube-driven transmitting tube SET amp?
  85. Circlotron questions
  86. Home Grown tube amps
  87. LT108 Oscillation sounds like tube rush/white noise
  88. Cool looking tubes anyone...
  89. st70 standby switch/cathode stripping SS rect
  90. BoM for an RH84 mono build?
  91. Signal hum ideas please.
  92. E88CC turbo
  93. SRPP vs. plate loaded, musicality and details
  94. 300B/EL156 Amp
  95. Just new one .all new layout.
  96. Am I correct????
  97. Need help identifying this amp...
  98. The Maggie factor
  99. Help wiring up anLED Bar
  100. E810F/7788 Pinout name/number?
  101. Adjust cathode bias pot - both channels move together. Why?
  102. Building a 45 SET
  103. Stereo Pententometer Questions
  104. dm160 magic eye help
  105. Zener heater regulator
  106. Dead Time - Correcting for it
  107. ARC Power source+ 12AX7&12AU7 Pre-amplifier
  108. PTC Thermistor for auto fixed bias
  109. How do I calculate output power?
  110. Microcontrollers in tube amps
  111. Dynaco PAT4/Aikido tube preamp
  112. RCA red base 5691 / 5692
  113. Updating my amps....and "hello" :-)
  114. my first attempt
  115. Finished my first PP amp, 6SJ7-6SN7-6v6
  116. Triode PP OP stage combining Blumlein Garter and CCS bias - anyone tried this?
  117. 6U8 Revisited
  118. DePalma redux
  119. Could this be a perfectly linear triode?
  120. Grounding elevated ccs series filament supply
  121. What to do with E182CC's
  122. Angela EL34 opinions please
  123. Chinese 6N1 tube replacement
  124. Ridiculous Hallucinations
  125. Transformer Ratings
  126. dB Meter with tube circuit
  127. Suggestions for pp or se monos
  128. Low filament current tubes
  129. Tube Clearout
  130. First tube amp, it needs maintenance
  131. Need EF86 phono preamplifier shematic
  132. cannot locate documentation on SCA 9190 receiver
  133. Ecc88 pin 9 connection??
  134. VTL Compact100 Monoblock Blows Fuse
  135. 300b driver revisited.
  136. SYclotron schematic
  137. Hum problem
  138. Suppo el34
  139. my new tube experience
  140. LL1682PP Lundahl
  141. BP Ultrapath
  142. Tube shops/sellers in Kiev , Ukraine ?
  143. Headphones with tubes...
  144. A Triad xfmr for a voltage doubler PSU
  145. Ra-100
  146. Series Resistors on Outputs of Transformer?
  147. what's up !? new choke=subsonic pumping
  148. How to get the best out of the 6C33C-B?
  149. TO-220 PCB spacing for HV MOSFETs
  150. Need input on Buffer stage to use in Preamp..
  151. quad output tube help
  152. "Stacking" power transformer secondaries?
  153. Tubes flare on start up!!
  154. Grid Stopper Advice - Graphs Included!
  155. Wanted! single-ended 807 schematic
  156. sputtering 5u4 on diy Wheatfield amp
  157. Is this output transformer faulty?
  158. Help identify variac
  159. what's a good layout for a quad EL84 amp on this box?
  160. Scott 350B Tuner; Bridge Rectifier
  161. intermitent static pops from speakers st70
  162. baxandall type tone control for diff amp
  163. Stage amps using DHTs
  164. Tube+OP My headphono & preamp
  165. NFB Clarification
  166. James output transformers
  167. I just bought a an old valve amp
  168. Bias Curves
  169. Triode in Class B or Beam Pentode in Class AB2
  170. Cathode Follower driven Phase Inverters
  171. Help finding a tube tester for Stereo tube amps.
  172. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  173. Zenith OPT question
  174. OT/Speaker impedance mismatch
  175. Goldilocks & the 3 (or more) preamp power supplies
  176. Using SE OT for PP.
  177. Need preamplifier schematic/suggestions
  178. Push-Pull vs Push-Pull-Parallel
  179. Odd/Crazy output transformer design?
  180. what 2A3 desgin recommented for home theater
  181. power supply for 10m45s
  182. How badly matched are your IXYS10M45S ?
  183. Class B Push-Pull
  184. Please comment on my design -and a few resistor values..
  185. How to lower even harmonic, keep odd one
  186. PC Mount 9-Pin Tube Socket Layout
  187. datasheet for type 52, help !!!
  188. Another kt88 Monoblock Builders Thread
  189. Question about stacked pawer supplies
  190. ys audio preamp
  191. Need help on 811A partial feedback
  192. Funny console, need ideas...
  193. SMPS experts come on in please!
  194. DC Filament supply boards
  195. Looking for vintage radio sound
  196. Channel death - Chinese EL34 PP
  197. JFET cascoded with tube gain calculation
  198. Fet 6Gk5 ECC88 mc phono stage
  199. Operating a stereo amp in bridged mode
  200. Mic input Transformer from Triode Elect
  201. Power transformer for tube amp requirements
  202. Tape playback amp
  203. Replace ECC83 preamp valve with E88CC(6922)
  204. Advice on 6P3S p-p amp schematic, feedback problem?
  205. 6S41S P-P Amp Initial Query
  206. El Cheapo, builders thread
  207. kbu608 rectifier
  208. Looking for nice sounding amp project
  209. B+ for EL84
  210. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  211. OPT with foil secondaries
  212. Small Tube Pre Amp - Power Supply Cable
  213. Identification of unknown output transformer
  214. master volume with a extra tube
  215. 10 pounds of power for $15
  216. Unstable Eico HF-87
  217. DIY Dual Channel Active Tube Tone Control
  218. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  219. question about the 866a
  220. Trade Custom Speaker Horns for Custom Amp
  221. TVA-1 valve amp - help
  222. Need to source a PSU chassis - simple steel
  223. What should I do with my Dynaco MKIII's
  224. inrush current
  225. Scott 222B output transformer : Compatibility and specs
  226. C3G/C3M Prices
  227. 5v3, 5u4, 5u4gb, 5u4gbm, 5931?
  228. transformer for quad EL84 SE amp - will Antek 360v work
  229. Best Possible Tube Headphone Amp
  230. Help with cheap mono SE
  231. Millkido 24
  232. 60W mono's design help
  233. Psu question - best place for the caps?
  234. RCA jacks
  235. comparison of heater termination noise
  236. Some questions about an amplifier design
  237. 2nd harmonic feedback
  238. idea's for a valve preamp
  239. Best line stage tube?
  240. Bias Adjustment point
  241. Looking for Williamson schematic
  242. Magnavox Console Speaker Impedances
  243. first tube amp
  244. Beam Triodes
  245. Winding output transformers
  246. Anyone Have a Schematic for Wavac MD300B?
  247. PushPull vs ParalelSE
  248. Painting transformer end bells
  249. all-octal schaded pp
  250. Strange Noise From Amp

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