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  1. Tube libraries for AutoTRAX wanted.
  2. DIY Layout Creator for Chassis Designs
  3. ecc99 - 6C19n PP, (6S19P)
  4. Strange HF distortion
  5. have a pair of 5k:8 OPTs lying around.. suggest me something to build?
  6. Early history of High Fidelity amplifiers
  7. Which pentode for input?
  8. 6n6p or 6P14P-ev for driver
  9. Old tranny - confused with windings
  10. Dynaco A-430 Vintage Output Transformers
  11. Output tube for 800 Ohm speaker?
  12. Today was the anual Tree Street Yard Sale event
  13. Florida ? what did I get ?
  14. 26HU5's vs 26DQ5's
  15. VoltCraft AT-400?
  16. Sonic differences: 45, 2A3, 300B, 845, 211
  17. Need help wiring a pot for cathode adjustment
  18. Sound of the 6SN7?
  19. A mystery device
  20. Plate curves... Ic2 & Ib?
  21. How to choke load for big voltage swings?
  22. 6550 SE design, please comment.
  23. "Impedance" of the output transformer
  24. Triode-wired small signal pentode question
  25. Calculating output impedance
  26. 6JM6 Infomation for Pete Millett's DCPP Amp
  27. Tube labeld ETBB
  28. Heaters wiring help!
  29. What do you guys think of this IR volume control?
  30. Can you send me the Aikido 5687 user manual
  31. Cathode Follower output cap
  32. EL84 rebuild suggestions
  33. voltage divider in WE91 driver
  34. Power Tx Myth?
  35. voltage multiplier based on SS trafo - LONG
  36. What tube for QUIET phono pre??
  37. A&R 8ohm 4008 output transformer
  38. How does DRD Ultrapath Work?
  39. Russian 6H2p-E??
  40. Started work on my stereo 7027a PSE amp
  41. Mono Tube Comp for analog kick drum
  42. Line stage preamplifier
  43. Trying to select the Aikido components
  44. X-PRE musical fidelity preamp. need help modifying
  45. 6C33C & Borbely Question
  46. 12BH7A in common cathode
  47. Sneak Preview: 9 Band Active All Tube EQ
  48. Bought a set of Greenlee conduit punches for my latest project - WOW!
  49. "Universal" octal amplifier?
  50. MU follower - distortion
  51. lighting transformers 12V
  52. Chinese 6N3 preamp questions
  53. Why are Chinese preamp knockoffs so popular?
  54. 4K7 OPT suitable for 6550/KT88?
  55. Transformer question - 110 v and 25 v from 1 secondary?
  56. About loadline again, how to choose load and current
  57. Parallel Output Transformers
  58. 6SN7 / 6V6 power amp : very odd behavour
  59. HV mA Spec on Large RCA Power Xfmr?
  60. Is the Aikido too 'bright'?
  61. Has anyone put the Glassware phono & line amps in same box?
  62. High impedance balanced output: how long the cable?
  63. Data Sheets
  64. Can I use a LM317 bias on lower cathode of SRPP?
  65. AU-34 Output transformer replacement question
  66. The new KT120 from tungsol
  67. em83 questions
  68. Push-pull PCL84 schematic and a question
  69. confused on power transformer ratings
  70. C3g:GM70:GM70 schematic advice
  71. Can someone explain Load Lines?
  72. Humming from WCF but not SRPP
  73. Gas regulator tubes
  74. My B&K 707 sensitivity seems wonky
  75. Lowrey LC1 B schematic wanted
  76. Complete tube amp novice got a few questions!!
  77. jacked up the bias...WOW!
  78. Looking for PP 7027a shematic
  79. So, if it's not DIY Gene, then what?
  80. What driver tube for 200Vrms?
  81. Tube socket purchase
  82. Something I found interesting a while ago!
  83. Eico HF-22 Circuit
  84. SEDHT amp - decisions decisions
  85. Confused with designing
  86. Digitally controlled analog attenuator
  87. Purchased my 1st valve amp and can only get one channel working, please help!
  88. Another silly tube yesting question
  89. potentially very stupid questions....
  90. Tube rectifier: AZ1, AZ31, AZ50 vs 5u4
  91. Tube Square-Law, what and how to set up?
  92. Need help finding schematic. Conn 720
  93. OPT for parafeed SE
  94. Anyone else tried an opamp as a driver?
  95. e180f/6688 pentode operting points
  96. power supply reassignment problem
  97. Mains power transformer on S5 K-12 kit hums?
  98. Oriole OPT
  99. 26DQ5's vs 26HU5's vs 6KN6's and transformers
  100. SRPP power using power tranny as OPT?
  101. Need guidance with heathkit SA-2 refurbish/mods
  102. B+ discharge times!
  103. 26HU5's....and a confession
  104. Bell Sound Systems Pacemaker Model 2220
  105. Any thoughts on this transformer on eBay?
  106. Need some help figuring out a Wurlitzer 6240.
  107. Bypassing cathode resistor on pp power tube
  108. TRIODE Voltage amp + Power OP output follower
  109. Cats and tube-a-holics
  110. Replace Tube Rectifier With Weber CC?
  111. 717a 2 stage SE amplifier
  112. Thoughts on Oatley K282 Valve Preamp?
  113. SS rectifier for SimpleSE and others...
  114. Need match Pr KT-88
  115. EL34 PP - again !!!
  116. S5 K-12 Kit sounds excellent with iPod, but relatively low volume with turntable?
  117. Finished K-12 Kit with cedar / brass chassis (pics)
  118. Tubes HOT!
  119. Meng volume pot problem
  120. Use P-P OPT for SE?
  121. Safety ?
  122. 851 set?
  123. dual cathode follower problem
  124. Question about connecting grounds
  125. Is it okay for capacitors to be close to the main power transformer in S5 K-12 Kit?
  126. Fisher 500C Schematic
  127. looking for PP 6l6 schematic
  128. Muiscal Paradise MP-301 6V6 amp.
  129. First Build - PS Voltage Question?
  130. Need help about an hybrid amp circuit
  131. Pioneer SX-348 - Service manual?
  132. Tube PS for mic preamp Help
  133. Add rectifier tube to yaqin mc10l? What size is best?
  134. global negative feedback schematic
  135. Signal transformer question
  136. What speaker system for tube amplifier
  137. 39/44 Tube
  138. tube-aholics anonymous ?
  139. 12AX7 heaters from 9VAC transformer
  140. Cant stop Aikido Humming
  141. Suggestions for rotary switches
  142. Question about potential transformer placement in K-12 Kit
  143. Extra pins on replacement potentiometer for K-12 tube kit?
  144. SRPP - issues understanding how to increase current
  145. ARC Power source+Marantz 7C(PCB edition)
  146. Repair and adjustment tips
  147. trimax output transformer TA2444
  148. anyone recognize this valve?
  149. Microphone Preamp design
  150. 6CM5 hi-fi amplifier
  151. Building an amp try #2
  152. Can the 6S33S/6C33C be mounted horizontally?
  153. A heptode question
  154. Looking for a 807 amp with 4 pairs of 807's
  155. pp output transformer miniblok2
  156. John Swenson's BDT preamp - finally!!
  157. Voice of Music console 816
  158. Steve Bench 1 tube reg in all glass
  159. Conn Caprice 427 needs new 12AU7 tubes—advice?
  160. Position of Iron in Can of HK Citation II Output Transformers
  161. Bottle size,does it matter in matched quads?
  162. Heater Pots?
  163. Current calculation from datasheet
  164. Any one ever seen this amp?
  165. Guiguang 300B for 300Beast.....
  166. FLEA PPP, all ecc99
  167. Well, it is time to start thinking about winter projects. GM70
  168. aghhh is my tube okay?
  169. Grid Bias provided by transformer secondary winding, what is this stuff about?
  170. Zener regulated supplies
  171. OPT fore drive ribbon speaker directly; why not ?
  172. van Dorn's Octode design - recommendations for a 10W/ch version
  173. Outrageous Speaker/Amplifier Idea
  174. Anyone ever made the EL84 P-P circuit referenced on the Tubecad Journal site?
  175. Cathode Follower ideas please.....
  176. Anyone used the NTE1866 VU LED driver?
  177. Any potential problems when using a combo potentiometer / power switch on a K-12 kit?
  178. Help needed understanding component values.
  179. Separate passive pre and monoblocks?
  180. My new diy site
  181. Valves and musical instruments
  182. My DC Darling
  183. Question - add LED power indicator to Aikido pre
  184. Colorful amps
  185. Aikido Cathode Follower
  186. Converting a dirty channel to clean?
  187. A few questions about transformer placement in an S5 K-12 tube amplifer
  188. Bogen AP30 and new member
  189. Echocord Super 62 Feedback at Low Levels?
  190. Direct Coupled 76/5687 linestage
  191. Be kind to your 5AR4 and input capacitor
  192. New Self-Powered ROHS compliant electronic device invented!
  193. Making my first hifi tube amp.
  194. Variation on Rodīs bias servo
  195. "No Light District" P-P amplifier
  196. What kind of tubes do i have?
  197. Understanding Scope Trace Square Wave
  198. Single tube SE with EML-20B
  199. LED bias cathodyne
  200. Diagnosing hum???
  201. Posted tube microphone preamp design
  202. Finally put the Aikido in a proper chassis
  203. Tube Preamp / Headphone amp question...
  204. Phono Preamp
  205. Initial 'DQ5' testing
  206. Free Tube Amplifier Schematic Diagrams
  207. Testing with DMM
  208. The Impressive Vetruvio GM70 SET amp.
  209. 6sn7 subminature??
  210. One channel louder than other
  211. How to use RCP 802A tube tester test B9A tubes?
  212. phono amp question - adding input tx
  213. Ebay "clones" PCB
  214. Phase splitter and balance input
  215. At Last....First Build Complete...6V6/6SL7
  216. Amplifier input
  217. The Tube Maze
  218. Variable Harmonizer
  219. Vetruvio Audio; new competition for the Chinese?
  220. Transmitting tube-driven transmitting tube SET amp?
  221. Circlotron questions
  222. Home Grown tube amps
  223. LT108 Oscillation sounds like tube rush/white noise
  224. Cool looking tubes anyone...
  225. st70 standby switch/cathode stripping SS rect
  226. BoM for an RH84 mono build?
  227. Signal hum ideas please.
  228. E88CC turbo
  229. SRPP vs. plate loaded, musicality and details
  230. 300B/EL156 Amp
  231. Just new one .all new layout.
  232. Am I correct????
  233. Need help identifying this amp...
  234. The Maggie factor
  235. Help wiring up anLED Bar
  236. E810F/7788 Pinout name/number?
  237. Need some help with a mercury 1200 tube checker
  238. Adjust cathode bias pot - both channels move together. Why?
  239. Building a 45 SET
  240. Stereo Pententometer Questions
  241. Looking for oscilloscope recommendations.
  242. dm160 magic eye help
  243. Zener heater regulator
  244. Dead Time - Correcting for it
  245. ARC Power source+ 12AX7&12AU7 Pre-amplifier
  246. PTC Thermistor for auto fixed bias
  247. How do I calculate output power?
  248. Microcontrollers in tube amps
  249. Dynaco PAT4/Aikido tube preamp
  250. RCA red base 5691 / 5692

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