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  1. Florida ? what did I get ?
  2. 26HU5's vs 26DQ5's
  3. VoltCraft AT-400?
  4. Sonic differences: 45, 2A3, 300B, 845, 211
  5. Need help wiring a pot for cathode adjustment
  6. Sound of the 6SN7?
  7. A mystery device
  8. Plate curves... Ic2 & Ib?
  9. How to choke load for big voltage swings?
  10. 6550 SE design, please comment.
  11. "Impedance" of the output transformer
  12. Triode-wired small signal pentode question
  13. Calculating output impedance
  14. 6JM6 Infomation for Pete Millett's DCPP Amp
  15. Tube labeld ETBB
  16. Heaters wiring help!
  17. What do you guys think of this IR volume control?
  18. Can you send me the Aikido 5687 user manual
  19. Cathode Follower output cap
  20. EL84 rebuild suggestions
  21. voltage divider in WE91 driver
  22. Power Tx Myth?
  23. voltage multiplier based on SS trafo - LONG
  24. What tube for QUIET phono pre??
  25. A&R 8ohm 4008 output transformer
  26. How does DRD Ultrapath Work?
  27. Russian 6H2p-E??
  28. Started work on my stereo 7027a PSE amp
  29. Mono Tube Comp for analog kick drum
  30. Line stage preamplifier
  31. Trying to select the Aikido components
  32. X-PRE musical fidelity preamp. need help modifying
  33. 6C33C & Borbely Question
  34. 12BH7A in common cathode
  35. Sneak Preview: 9 Band Active All Tube EQ
  36. Bought a set of Greenlee conduit punches for my latest project - WOW!
  37. "Universal" octal amplifier?
  38. MU follower - distortion
  39. lighting transformers 12V
  40. Chinese 6N3 preamp questions
  41. Why are Chinese preamp knockoffs so popular?
  42. 4K7 OPT suitable for 6550/KT88?
  43. Transformer question - 110 v and 25 v from 1 secondary?
  44. About loadline again, how to choose load and current
  45. Parallel Output Transformers
  46. 6SN7 / 6V6 power amp : very odd behavour
  47. HV mA Spec on Large RCA Power Xfmr?
  48. Is the Aikido too 'bright'?
  49. Has anyone put the Glassware phono & line amps in same box?
  50. High impedance balanced output: how long the cable?
  51. Data Sheets
  52. Can I use a LM317 bias on lower cathode of SRPP?
  53. AU-34 Output transformer replacement question
  54. The new KT120 from tungsol
  55. em83 questions
  56. Push-pull PCL84 schematic and a question
  57. confused on power transformer ratings
  58. C3g:GM70:GM70 schematic advice
  59. Can someone explain Load Lines?
  60. Humming from WCF but not SRPP
  61. Gas regulator tubes
  62. My B&K 707 sensitivity seems wonky
  63. Lowrey LC1 B schematic wanted
  64. Complete tube amp novice got a few questions!!
  65. jacked up the bias...WOW!
  66. Looking for PP 7027a shematic
  67. So, if it's not DIY Gene, then what?
  68. What driver tube for 200Vrms?
  69. Tube socket purchase
  70. Something I found interesting a while ago!
  71. Eico HF-22 Circuit
  72. SEDHT amp - decisions decisions
  73. Confused with designing
  74. Digitally controlled analog attenuator
  75. Purchased my 1st valve amp and can only get one channel working, please help!
  76. Another silly tube yesting question
  77. potentially very stupid questions....
  78. Tube rectifier: AZ1, AZ31, AZ50 vs 5u4
  79. Tube Square-Law, what and how to set up?
  80. Need help finding schematic. Conn 720
  81. OPT for parafeed SE
  82. Anyone else tried an opamp as a driver?
  83. e180f/6688 pentode operting points
  84. power supply reassignment problem
  85. Mains power transformer on S5 K-12 kit hums?
  86. Oriole OPT
  87. 26DQ5's vs 26HU5's vs 6KN6's and transformers
  88. SRPP power using power tranny as OPT?
  89. Need guidance with heathkit SA-2 refurbish/mods
  90. B+ discharge times!
  91. 26HU5's....and a confession
  92. Bell Sound Systems Pacemaker Model 2220
  93. Any thoughts on this transformer on eBay?
  94. Need some help figuring out a Wurlitzer 6240.
  95. Bypassing cathode resistor on pp power tube
  96. TRIODE Voltage amp + Power OP output follower
  97. Cats and tube-a-holics
  98. Replace Tube Rectifier With Weber CC?
  99. 717a 2 stage SE amplifier
  100. Thoughts on Oatley K282 Valve Preamp?
  101. SS rectifier for SimpleSE and others...
  102. Need match Pr KT-88
  103. EL34 PP - again !!!
  104. S5 K-12 Kit sounds excellent with iPod, but relatively low volume with turntable?
  105. Finished K-12 Kit with cedar / brass chassis (pics)
  106. Tubes HOT!
  107. Meng volume pot problem
  108. Use P-P OPT for SE?
  109. Safety ?
  110. 851 set?
  111. dual cathode follower problem
  112. Question about connecting grounds
  113. Is it okay for capacitors to be close to the main power transformer in S5 K-12 Kit?
  114. Fisher 500C Schematic
  115. looking for PP 6l6 schematic
  116. Muiscal Paradise MP-301 6V6 amp.
  117. First Build - PS Voltage Question?
  118. Need help about an hybrid amp circuit
  119. Pioneer SX-348 - Service manual?
  120. Tube PS for mic preamp Help
  121. Add rectifier tube to yaqin mc10l? What size is best?
  122. global negative feedback schematic
  123. Signal transformer question
  124. What speaker system for tube amplifier
  125. 39/44 Tube
  126. tube-aholics anonymous ?
  127. 12AX7 heaters from 9VAC transformer
  128. Cant stop Aikido Humming
  129. Suggestions for rotary switches
  130. Question about potential transformer placement in K-12 Kit
  131. Extra pins on replacement potentiometer for K-12 tube kit?
  132. SRPP - issues understanding how to increase current
  133. ARC Power source+Marantz 7C(PCB edition)
  134. Repair and adjustment tips
  135. trimax output transformer TA2444
  136. anyone recognize this valve?
  137. Microphone Preamp design
  138. 6CM5 hi-fi amplifier
  139. Building an amp try #2
  140. Can the 6S33S/6C33C be mounted horizontally?
  141. A heptode question
  142. Looking for a 807 amp with 4 pairs of 807's
  143. pp output transformer miniblok2
  144. John Swenson's BDT preamp - finally!!
  145. Voice of Music console 816
  146. Steve Bench 1 tube reg in all glass
  147. Conn Caprice 427 needs new 12AU7 tubes—advice?
  148. Position of Iron in Can of HK Citation II Output Transformers
  149. Bottle size,does it matter in matched quads?
  150. Heater Pots?
  151. Current calculation from datasheet
  152. Any one ever seen this amp?
  153. Guiguang 300B for 300Beast.....
  154. FLEA PPP, all ecc99
  155. Well, it is time to start thinking about winter projects. GM70
  156. aghhh is my tube okay?
  157. Grid Bias provided by transformer secondary winding, what is this stuff about?
  158. Zener regulated supplies
  159. OPT fore drive ribbon speaker directly; why not ?
  160. van Dorn's Octode design - recommendations for a 10W/ch version
  161. Outrageous Speaker/Amplifier Idea
  162. Anyone ever made the EL84 P-P circuit referenced on the Tubecad Journal site?
  163. Cathode Follower ideas please.....
  164. Anyone used the NTE1866 VU LED driver?
  165. Any potential problems when using a combo potentiometer / power switch on a K-12 kit?
  166. Help needed understanding component values.
  167. Separate passive pre and monoblocks?
  168. My new diy site
  169. Valves and musical instruments
  170. My DC Darling
  171. Question - add LED power indicator to Aikido pre
  172. Colorful amps
  173. Aikido Cathode Follower
  174. Converting a dirty channel to clean?
  175. A few questions about transformer placement in an S5 K-12 tube amplifer
  176. Bogen AP30 and new member
  177. Echocord Super 62 Feedback at Low Levels?
  178. Direct Coupled 76/5687 linestage
  179. Be kind to your 5AR4 and input capacitor
  180. New Self-Powered ROHS compliant electronic device invented!
  181. Making my first hifi tube amp.
  182. Variation on Rodīs bias servo
  183. "No Light District" P-P amplifier
  184. What kind of tubes do i have?
  185. Understanding Scope Trace Square Wave
  186. Single tube SE with EML-20B
  187. LED bias cathodyne
  188. Diagnosing hum???
  189. Posted tube microphone preamp design
  190. Finally put the Aikido in a proper chassis
  191. Tube Preamp / Headphone amp question...
  192. Phono Preamp
  193. Initial 'DQ5' testing
  194. Free Tube Amplifier Schematic Diagrams
  195. Testing with DMM
  196. The Impressive Vetruvio GM70 SET amp.
  197. 6sn7 subminature??
  198. One channel louder than other
  199. How to use RCP 802A tube tester test B9A tubes?
  200. phono amp question - adding input tx
  201. Ebay "clones" PCB
  202. Phase splitter and balance input
  203. At Last....First Build Complete...6V6/6SL7
  204. Amplifier input
  205. The Tube Maze
  206. Variable Harmonizer
  207. Vetruvio Audio; new competition for the Chinese?
  208. Transmitting tube-driven transmitting tube SET amp?
  209. Circlotron questions
  210. Home Grown tube amps
  211. LT108 Oscillation sounds like tube rush/white noise
  212. Cool looking tubes anyone...
  213. st70 standby switch/cathode stripping SS rect
  214. BoM for an RH84 mono build?
  215. Signal hum ideas please.
  216. E88CC turbo
  217. SRPP vs. plate loaded, musicality and details
  218. 300B/EL156 Amp
  219. Just new one .all new layout.
  220. Am I correct????
  221. Need help identifying this amp...
  222. The Maggie factor
  223. Help wiring up anLED Bar
  224. E810F/7788 Pinout name/number?
  225. Need some help with a mercury 1200 tube checker
  226. Adjust cathode bias pot - both channels move together. Why?
  227. Building a 45 SET
  228. Stereo Pententometer Questions
  229. Looking for oscilloscope recommendations.
  230. dm160 magic eye help
  231. Zener heater regulator
  232. Dead Time - Correcting for it
  233. ARC Power source+ 12AX7&12AU7 Pre-amplifier
  234. PTC Thermistor for auto fixed bias
  235. How do I calculate output power?
  236. Microcontrollers in tube amps
  237. Dynaco PAT4/Aikido tube preamp
  238. RCA red base 5691 / 5692
  239. Updating my amps....and "hello" :-)
  240. my first attempt
  241. Finished my first PP amp, 6SJ7-6SN7-6v6
  242. Triode PP OP stage combining Blumlein Garter and CCS bias - anyone tried this?
  243. 6U8 Revisited
  244. DePalma redux
  245. Could this be a perfectly linear triode?
  246. Grounding elevated ccs series filament supply
  247. What to do with E182CC's
  248. Angela EL34 opinions please
  249. Chinise 6N1 tube replacement
  250. Ridiculous Hallucinations

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