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  1. Tubes HOT!
  2. Meng volume pot problem
  3. Use P-P OPT for SE?
  4. Safety ?
  5. Film caps always better than lytics?
  6. Valve Preamp for voice / guitar purpose
  7. 851 set?
  8. dual cathode follower problem
  9. Question about connecting grounds
  10. Is it okay for capacitors to be close to the main power transformer in S5 K-12 Kit?
  11. Fisher 500C Schematic
  12. looking for PP 6l6 schematic
  13. Muiscal Paradise MP-301 6V6 amp.
  14. First Build - PS Voltage Question?
  15. Need help about an hybrid amp circuit
  16. Radio to guitaramp conversion hum problem
  17. Pioneer SX-348 - Service manual?
  18. Tube PS for mic preamp Help
  19. Add rectifier tube to yaqin mc10l? What size is best?
  20. global negative feedback schematic
  21. Signal transformer question
  22. What speaker system for tube amplifier
  23. 39/44 Tube
  24. tube-aholics anonymous ?
  25. 12AX7 heaters from 9VAC transformer
  26. Cant stop Aikido Humming
  27. Suggestions for rotary switches
  28. Question about potential transformer placement in K-12 Kit
  29. Extra pins on replacement potentiometer for K-12 tube kit?
  30. Instrument tube / valve preamp
  31. SRPP - issues understanding how to increase current
  32. ARC Power source+Marantz 7C(PCB edition)
  33. Repair and adjustment tips
  34. trimax output transformer TA2444
  35. anyone recognize this valve?
  36. Microphone Preamp design
  37. 6CM5 hi-fi amplifier
  38. Building an amp try #2
  39. Can the 6S33S/6C33C be mounted horizontally?
  40. A heptode question
  41. Looking for a 807 amp with 4 pairs of 807's
  42. pp output transformer miniblok2
  43. John Swenson's BDT preamp - finally!!
  44. Voice of Music console 816
  45. Steve Bench 1 tube reg in all glass
  46. Conn Caprice 427 needs new 12AU7 tubes—advice?
  47. Position of Iron in Can of HK Citation II Output Transformers
  48. Bottle size,does it matter in matched quads?
  49. Heater Pots?
  50. Current calculation from datasheet
  51. Any one ever seen this amp?
  52. Guiguang 300B for 300Beast.....
  53. FLEA PPP, all ecc99
  54. Well, it is time to start thinking about winter projects. GM70
  55. aghhh is my tube okay?
  56. Grid Bias provided by transformer secondary winding, what is this stuff about?
  57. Zener regulated supplies
  58. OPT fore drive ribbon speaker directly; why not ?
  59. van Dorn's Octode design - recommendations for a 10W/ch version
  60. Outrageous Speaker/Amplifier Idea
  61. Anyone ever made the EL84 P-P circuit referenced on the Tubecad Journal site?
  62. Scratchy volume pot on TAD DIY deluxe reverb
  63. Cathode Follower ideas please.....
  64. Anyone used the NTE1866 VU LED driver?
  65. Any potential problems when using a combo potentiometer / power switch on a K-12 kit?
  66. Help needed understanding component values.
  67. Separate passive pre and monoblocks?
  68. My new diy site
  69. Valves and musical instruments
  70. My DC Darling
  71. Question - add LED power indicator to Aikido pre
  72. Colorful amps
  73. Aikido Cathode Follower
  74. Converting a dirty channel to clean?
  75. A few questions about transformer placement in an S5 K-12 tube amplifer
  76. Bogen AP30 and new member
  77. Adding Clean channel to AX84 P1-Ex
  78. Echocord Super 62 Feedback at Low Levels?
  79. Direct Coupled 76/5687 linestage
  80. Be kind to your 5AR4 and input capacitor
  81. New Self-Powered ROHS compliant electronic device invented!
  82. Making my first hifi tube amp.
  83. Variation on Rodīs bias servo
  84. "No Light District" P-P amplifier
  85. What kind of tubes do i have?
  86. Understanding Scope Trace Square Wave
  87. Single tube SE with EML-20B
  88. LED bias cathodyne
  89. Diagnosing hum???
  90. Posted tube microphone preamp design
  91. Finally put the Aikido in a proper chassis
  92. Tube Preamp / Headphone amp question...
  93. Phono Preamp
  94. Initial 'DQ5' testing
  95. Free Tube Amplifier Schematic Diagrams
  96. Testing with DMM
  97. The Impressive Vetruvio GM70 SET amp.
  98. Fender Twin Reverb channel 2 has no output
  99. 6sn7 subminature??
  100. One channel louder than other
  101. How to use RCP 802A tube tester test B9A tubes?
  102. phono amp question - adding input tx
  103. Ebay "clones" PCB
  104. Phase splitter and balance input
  105. At Last....First Build Complete...6V6/6SL7
  106. Amplifier input
  107. The Tube Maze
  108. Variable Harmonizer
  109. Vetruvio Audio; new competition for the Chinese?
  110. Transmitting tube-driven transmitting tube SET amp?
  111. Circlotron questions
  112. Home Grown tube amps
  113. LT108 Oscillation sounds like tube rush/white noise
  114. Cool looking tubes anyone...
  115. st70 standby switch/cathode stripping SS rect
  116. BoM for an RH84 mono build?
  117. Signal hum ideas please.
  118. E88CC turbo
  119. SRPP vs. plate loaded, musicality and details
  120. 300B/EL156 Amp
  121. Just new one .all new layout.
  122. Am I correct????
  123. Need help identifying this amp...
  124. The Maggie factor
  125. Help wiring up anLED Bar
  126. E810F/7788 Pinout name/number?
  127. Need some help with a mercury 1200 tube checker
  128. Adjust cathode bias pot - both channels move together. Why?
  129. Building a 45 SET
  130. Stereo Pententometer Questions
  131. Looking for oscilloscope recommendations.
  132. dm160 magic eye help
  133. Tube stage for acoustic guitar?
  134. Zener heater regulator
  135. Dead Time - Correcting for it
  136. ARC Power source+ 12AX7&12AU7 Pre-amplifier
  137. PTC Thermistor for auto fixed bias
  138. How do I calculate output power?
  139. Microcontrollers in tube amps
  140. Dynaco PAT4/Aikido tube preamp
  141. RCA red base 5691 / 5692
  142. Updating my amps....and "hello" :-)
  143. my first attempt
  144. Finished my first PP amp, 6SJ7-6SN7-6v6
  145. Triode PP OP stage combining Blumlein Garter and CCS bias - anyone tried this?
  146. 6U8 Revisited
  147. DePalma redux
  148. Could this be a perfectly linear triode?
  149. Grounding elevated ccs series filament supply
  150. What to do with E182CC's
  151. Angela EL34 opinions please
  152. Chinise 6N1 tube replacement
  153. Ridiculous Hallucinations
  154. Transformer Ratings
  155. dB Meter with tube circuit
  156. Suggestions for pp or se monos
  157. Low filament current tubes
  158. Tube Clearout
  159. First tube amp, it needs maintenance
  160. Need EF86 phono preamplifier shematic
  161. cannot locate documentation on SCA 9190 receiver
  162. Ecc88 pin 9 connection??
  163. VTL Compact100 Monoblock Blows Fuse
  164. 300b driver revisited.
  165. SYclotron schematic
  166. Hum problem
  167. Suppo el34
  168. my new tube experience
  169. LL1682PP Lundahl
  170. BP Ultrapath
  171. Tube shops/sellers in Kiev , Ukraine ?
  172. Headphones with tubes...
  173. A Triad xfmr for a voltage doubler PSU
  174. Ra-100
  175. Series Resistors on Outputs of Transformer?
  176. what's up !? new choke=subsonic pumping
  177. How to get the best out of the 6C33C-B?
  178. TO-220 PCB spacing for HV MOSFETs
  179. Deluxe Reverb Clone too "throaty"
  180. Using a Dynaco ST-70 audio transformer for a guitar amp
  181. Need input on Buffer stage to use in Preamp..
  182. quad output tube help
  183. "Stacking" power transformer secondaries?
  184. Tubes flare on start up!!
  185. Solid state rectifier for AC30 clone
  186. Grid Stopper Advice - Graphs Included!
  187. Western Electric settings for Hickok 600A?
  188. Wanted! single-ended 807 schematic
  189. sputtering 5u4 on diy Wheatfield amp
  190. Is this output transformer faulty?
  191. Help identify variac
  192. Schematic for TL Audio VP-5051 Voice Processor
  193. what's a good layout for a quad EL84 amp on this box?
  194. Scott 350B Tuner; Bridge Rectifier
  195. intermitent static pops from speakers st70
  196. baxandall type tone control for diff amp
  197. Stage amps using DHTs
  198. Tube+OP My headphono & preamp
  199. NFB Clarification
  200. James output transformers
  201. I just bought a an old valve amp
  202. Bias Curves
  203. Triode in Class B or Beam Pentode in Class AB2
  204. Elna Cerafine Caps
  205. help with calibrating a Tv7d/U military tube tester
  206. Cathode Follower driven Phase Inverters
  207. Help finding a tube tester for Stereo tube amps.
  208. Anything horribly wrong with this (LTP w/ LM317 as CCS)
  209. Zenith OPT question
  210. OT/Speaker impedance mismatch
  211. Goldilocks & the 3 (or more) preamp power supplies
  212. Using SE OT for PP.
  213. Need preamplifier schematic/suggestions
  214. Push-Pull vs Push-Pull-Parallel
  215. Odd/Crazy output transformer design?
  216. what 2A3 desgin recommented for home theater
  217. power supply for 10m45s
  218. How badly matched are your IXYS10M45S ?
  219. Class B Push-Pull
  220. Please comment on my design -and a few resistor values..
  221. How to lower even harmonic, keep odd one
  222. PC Mount 9-Pin Tube Socket Layout
  223. datasheet for type 52, help !!!
  224. Another kt88 Monoblock Builders Thread
  225. Question about stacked pawer supplies
  226. ys audio preamp
  227. Need help on 811A partial feedback
  228. Funny console, need ideas...
  229. SMPS experts come on in please!
  230. DC Filament supply boards
  231. Looking for vintage radio sound
  232. Channel death - Chinese EL34 PP
  233. JFET cascoded with tube gain calculation
  234. Fet 6Gk5 ECC88 mc phono stage
  235. Heathkit ol-1 oscilloscope help. Can't get solid spot during setup procedure.
  236. Operating a stereo amp in bridged mode
  237. Mic input Transformer from Triode Elect
  238. Power transformer for tube amp requirements
  239. Tape playback amp
  240. Tube for high input Z
  241. Eico 666 tube tester restoration - need grid control!
  242. Need Schematic/Manual Lambda 71
  243. Replace ECC83 preamp valve with E88CC(6922)
  244. Advice on 6P3S p-p amp schematic, feedback problem?
  245. 6S41S P-P Amp Initial Query
  246. El Cheapo, builders thread
  247. kbu608 rectifier
  248. Looking for nice sounding amp project
  249. B+ for EL84
  250. Output Transformer kt88 6550 pp, Wires? Jukebox? Help.

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