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  1. Is it okay for capacitors to be close to the main power transformer in S5 K-12 Kit?
  2. Fisher 500C Schematic
  3. looking for PP 6l6 schematic
  4. Muiscal Paradise MP-301 6V6 amp.
  5. First Build - PS Voltage Question?
  6. Need help about an hybrid amp circuit
  7. Radio to guitaramp conversion hum problem
  8. Pioneer SX-348 - Service manual?
  9. Tube PS for mic preamp Help
  10. Add rectifier tube to yaqin mc10l? What size is best?
  11. global negative feedback schematic
  12. Signal transformer question
  13. What speaker system for tube amplifier
  14. 39/44 Tube
  15. tube-aholics anonymous ?
  16. 12AX7 heaters from 9VAC transformer
  17. Cant stop Aikido Humming
  18. Suggestions for rotary switches
  19. Question about potential transformer placement in K-12 Kit
  20. Extra pins on replacement potentiometer for K-12 tube kit?
  21. Instrument tube / valve preamp
  22. SRPP - issues understanding how to increase current
  23. ARC Power source+Marantz 7C(PCB edition)
  24. Repair and adjustment tips
  25. trimax output transformer TA2444
  26. anyone recognize this valve?
  27. Microphone Preamp design
  28. 6CM5 hi-fi amplifier
  29. Building an amp try #2
  30. Can the 6S33S/6C33C be mounted horizontally?
  31. A heptode question
  32. Looking for a 807 amp with 4 pairs of 807's
  33. pp output transformer miniblok2
  34. John Swenson's BDT preamp - finally!!
  35. Voice of Music console 816
  36. Steve Bench 1 tube reg in all glass
  37. Conn Caprice 427 needs new 12AU7 tubes—advice?
  38. Position of Iron in Can of HK Citation II Output Transformers
  39. Bottle size,does it matter in matched quads?
  40. Heater Pots?
  41. Current calculation from datasheet
  42. Any one ever seen this amp?
  43. Guiguang 300B for 300Beast.....
  44. FLEA PPP, all ecc99
  45. Well, it is time to start thinking about winter projects. GM70
  46. aghhh is my tube okay?
  47. Grid Bias provided by transformer secondary winding, what is this stuff about?
  48. Zener regulated supplies
  49. OPT fore drive ribbon speaker directly; why not ?
  50. van Dorn's Octode design - recommendations for a 10W/ch version
  51. Outrageous Speaker/Amplifier Idea
  52. Anyone ever made the EL84 P-P circuit referenced on the Tubecad Journal site?
  53. Scratchy volume pot on TAD DIY deluxe reverb
  54. Cathode Follower ideas please.....
  55. Anyone used the NTE1866 VU LED driver?
  56. Any potential problems when using a combo potentiometer / power switch on a K-12 kit?
  57. Help needed understanding component values.
  58. Separate passive pre and monoblocks?
  59. My new diy site
  60. Valves and musical instruments
  61. My DC Darling
  62. Question - add LED power indicator to Aikido pre
  63. Colorful amps
  64. Aikido Cathode Follower
  65. Converting a dirty channel to clean?
  66. A few questions about transformer placement in an S5 K-12 tube amplifer
  67. Bogen AP30 and new member
  68. Adding Clean channel to AX84 P1-Ex
  69. Echocord Super 62 Feedback at Low Levels?
  70. Direct Coupled 76/5687 linestage
  71. Be kind to your 5AR4 and input capacitor
  72. New Self-Powered ROHS compliant electronic device invented!
  73. Making my first hifi tube amp.
  74. Variation on Rodīs bias servo
  75. "No Light District" P-P amplifier
  76. What kind of tubes do i have?
  77. Understanding Scope Trace Square Wave
  78. Single tube SE with EML-20B
  79. LED bias cathodyne
  80. Diagnosing hum???
  81. Posted tube microphone preamp design
  82. Finally put the Aikido in a proper chassis
  83. Tube Preamp / Headphone amp question...
  84. Phono Preamp
  85. Initial 'DQ5' testing
  86. Free Tube Amplifier Schematic Diagrams
  87. Testing with DMM
  88. The Impressive Vetruvio GM70 SET amp.
  89. Fender Twin Reverb channel 2 has no output
  90. 6sn7 subminature??
  91. One channel louder than other
  92. How to use RCP 802A tube tester test B9A tubes?
  93. phono amp question - adding input tx
  94. Ebay "clones" PCB
  95. Phase splitter and balance input
  96. At Last....First Build Complete...6V6/6SL7
  97. Amplifier input
  98. The Tube Maze
  99. Variable Harmonizer
  100. Vetruvio Audio; new competition for the Chinese?
  101. Transmitting tube-driven transmitting tube SET amp?
  102. Circlotron questions
  103. Home Grown tube amps
  104. LT108 Oscillation sounds like tube rush/white noise
  105. Cool looking tubes anyone...
  106. st70 standby switch/cathode stripping SS rect
  107. BoM for an RH84 mono build?
  108. Signal hum ideas please.
  109. E88CC turbo
  110. SRPP vs. plate loaded, musicality and details
  111. 300B/EL156 Amp
  112. Just new one .all new layout.
  113. Am I correct????
  114. Need help identifying this amp...
  115. The Maggie factor
  116. Help wiring up anLED Bar
  117. E810F/7788 Pinout name/number?
  118. Need some help with a mercury 1200 tube checker
  119. Adjust cathode bias pot - both channels move together. Why?
  120. Building a 45 SET
  121. Stereo Pententometer Questions
  122. Looking for oscilloscope recommendations.
  123. dm160 magic eye help
  124. Tube stage for acoustic guitar?
  125. Zener heater regulator
  126. Dead Time - Correcting for it
  127. ARC Power source+ 12AX7&12AU7 Pre-amplifier
  128. PTC Thermistor for auto fixed bias
  129. How do I calculate output power?
  130. Microcontrollers in tube amps
  131. Dynaco PAT4/Aikido tube preamp
  132. RCA red base 5691 / 5692
  133. Updating my amps....and "hello" :-)
  134. my first attempt
  135. Finished my first PP amp, 6SJ7-6SN7-6v6
  136. Triode PP OP stage combining Blumlein Garter and CCS bias - anyone tried this?
  137. 6U8 Revisited
  138. DePalma redux
  139. Could this be a perfectly linear triode?
  140. Grounding elevated ccs series filament supply
  141. What to do with E182CC's
  142. Angela EL34 opinions please
  143. Chinise 6N1 tube replacement
  144. Ridiculous Hallucinations
  145. Transformer Ratings
  146. dB Meter with tube circuit
  147. Suggestions for pp or se monos
  148. Low filament current tubes
  149. Tube Clearout
  150. First tube amp, it needs maintenance
  151. Need EF86 phono preamplifier shematic
  152. cannot locate documentation on SCA 9190 receiver
  153. Ecc88 pin 9 connection??
  154. VTL Compact100 Monoblock Blows Fuse
  155. 300b driver revisited.
  156. SYclotron schematic
  157. Hum problem
  158. Suppo el34
  159. my new tube experience
  160. LL1682PP Lundahl
  161. BP Ultrapath
  162. Tube shops/sellers in Kiev , Ukraine ?
  163. Headphones with tubes...
  164. A Triad xfmr for a voltage doubler PSU
  165. Ra-100
  166. Series Resistors on Outputs of Transformer?
  167. what's up !? new choke=subsonic pumping
  168. How to get the best out of the 6C33C-B?
  169. TO-220 PCB spacing for HV MOSFETs
  170. Deluxe Reverb Clone too "throaty"
  171. Using a Dynaco ST-70 audio transformer for a guitar amp
  172. Need input on Buffer stage to use in Preamp..
  173. quad output tube help
  174. "Stacking" power transformer secondaries?
  175. Tubes flare on start up!!
  176. Solid state rectifier for AC30 clone
  177. Grid Stopper Advice - Graphs Included!
  178. Western Electric settings for Hickok 600A?
  179. Wanted! single-ended 807 schematic
  180. sputtering 5u4 on diy Wheatfield amp
  181. Is this output transformer faulty?
  182. Help identify variac
  183. Schematic for TL Audio VP-5051 Voice Processor
  184. what's a good layout for a quad EL84 amp on this box?
  185. Scott 350B Tuner; Bridge Rectifier
  186. intermitent static pops from speakers st70
  187. baxandall type tone control for diff amp
  188. Stage amps using DHTs
  189. Tube+OP My headphono & preamp
  190. NFB Clarification
  191. James output transformers
  192. I just bought a an old valve amp
  193. Bias Curves
  194. Triode in Class B or Beam Pentode in Class AB2
  195. Elna Cerafine Caps
  196. help with calibrating a Tv7d/U military tube tester
  197. Cathode Follower driven Phase Inverters
  198. Help finding a tube tester for Stereo tube amps.
  199. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  200. Zenith OPT question
  201. OT/Speaker impedance mismatch
  202. Goldilocks & the 3 (or more) preamp power supplies
  203. Using SE OT for PP.
  204. Need preamplifier schematic/suggestions
  205. Push-Pull vs Push-Pull-Parallel
  206. Odd/Crazy output transformer design?
  207. what 2A3 desgin recommented for home theater
  208. power supply for 10m45s
  209. How badly matched are your IXYS10M45S ?
  210. Class B Push-Pull
  211. Please comment on my design -and a few resistor values..
  212. How to lower even harmonic, keep odd one
  213. PC Mount 9-Pin Tube Socket Layout
  214. datasheet for type 52, help !!!
  215. Another kt88 Monoblock Builders Thread
  216. Question about stacked pawer supplies
  217. ys audio preamp
  218. Need help on 811A partial feedback
  219. Funny console, need ideas...
  220. SMPS experts come on in please!
  221. DC Filament supply boards
  222. Looking for vintage radio sound
  223. Channel death - Chinese EL34 PP
  224. JFET cascoded with tube gain calculation
  225. Fet 6Gk5 ECC88 mc phono stage
  226. Heathkit ol-1 oscilloscope help. Can't get solid spot during setup procedure.
  227. Operating a stereo amp in bridged mode
  228. Mic input Transformer from Triode Elect
  229. Power transformer for tube amp requirements
  230. Tape playback amp
  231. Tube for high input Z
  232. Eico 666 tube tester restoration - need grid control!
  233. Need Schematic/Manual Lambda 71
  234. Replace ECC83 preamp valve with E88CC(6922)
  235. Advice on 6P3S p-p amp schematic, feedback problem?
  236. 6S41S P-P Amp Initial Query
  237. El Cheapo, builders thread
  238. kbu608 rectifier
  239. Looking for nice sounding amp project
  240. B+ for EL84
  241. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.
  242. OPT with foil secondaries
  243. Small Tube Pre Amp - Power Supply Cable
  244. Identification of unknown output transformer
  245. master volume with a extra tube
  246. 10 pounds of power for $15
  247. Unstable Eico HF-87
  248. DIY Dual Channel Active Tube Tone Control
  249. cant eliminate 50hz hum on just one side of the 6h6p headphoneamp
  250. question about the 866a

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