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  1. Tube Pre-Amp Schematic Needed
  2. find a YAQIN 5881a amplifier
  3. 11N90C in the SBCCS circuit
  4. Help replacing a PSU choke - How to choose choke
  5. does this look like a joke to you?
  6. Electronic Choke for Valve Amplifiers
  7. Sockets for a WE429A
  8. To bypass or not to bypass...
  9. DIY Curve Tracer
  10. 300B filament winding center tapped?
  11. help me decide,headphone amp - parafeed or normal tx ?
  12. 7060 vs 6AN8A
  13. Psu
  14. Blackheart amp moding question
  15. EDCOR Output transformer for 300B
  16. 80 or RGN1064 Scenario
  17. TUBENEWB - Quad KT88 Monoblocks
  18. CCS in Differential phase splitter?
  19. Need schematic for Smart 2x150vt
  20. Antek OPT
  21. 6DQ6 for audio power amp?
  22. Anyone identify this Mullard?
  23. My Mullard 5-20: some photos and a question
  24. Tube can work in low volt~~fix your knowledge
  25. A problem with a tube receiver
  26. Auto Transformer - safety advice
  27. Where I could find tube in San Jose
  28. 6Н30П spice model for MicroCap ?
  29. Transformer input and resonance
  30. GE6111 Preamplifier
  31. Where to buy audio tubes in Europe
  32. Play iPod into 1955 Record Player's Tube Amplifier
  33. To Schade it , or not..
  34. questions on input stage
  35. Planar/Lighthouse triodes for Audio?
  36. The Best coupling cap..THEL??
  37. 211 SET 40W output design and mfg.
  38. Volume Control with Loudness and no Taps
  39. Use for 4k PP (non UL) OPT's?
  40. Heathkit Oscilloscope O-12
  41. Filament Autobias
  42. Shelby NC Ham Fest
  43. 2A3 Spud
  44. Resistor as a load
  45. How to balance pushp pull DHT finals
  46. 240v to 220v
  47. Hammond 272 FX plate voltage
  48. Drawing Load Line for Parallel Output Tube
  49. question about swapping el34 for kt77 in my tube amp
  50. 6 volt recifier tubes
  51. PSU Capacitor Selection
  52. Output transformer sizing...again...
  53. Power supply cabling
  54. Voltage doubler using PSUII?
  55. Rectifier Tubes in SE Amps
  56. 6v6 SEP
  57. 1967 Pioneer SX-34, 11W, WORTH FIXING???
  58. Jumper Wire Gauge and Material for Phono Preamp?
  59. Tube libraries for AutoTRAX wanted.
  60. DIY Layout Creator for Chassis Designs
  61. ecc99 - 6C19n PP, (6S19P)
  62. Dr Z Carmen Ghia build from a Hammond Reverb amp!!
  63. Strange HF distortion
  64. have a pair of 5k:8 OPTs lying around.. suggest me something to build?
  65. Marshall 1959 (Super Tremolo) repair help
  66. Early history of High Fidelity amplifiers
  67. Which pentode for input?
  68. 6n6p or 6P14P-ev for driver
  69. Old tranny - confused with windings
  70. Dynaco A-430 Vintage Output Transformers
  71. Output tube for 800 Ohm speaker?
  72. Today was the anual Tree Street Yard Sale event
  73. Florida ? what did I get ?
  74. 26HU5's vs 26DQ5's
  75. VoltCraft AT-400?
  76. Sonic differences: 45, 2A3, 300B, 845, 211
  77. Need help wiring a pot for cathode adjustment
  78. Sound of the 6SN7?
  79. A mystery device
  80. Plate curves... Ic2 & Ib?
  81. How to choke load for big voltage swings?
  82. 6550 SE design, please comment.
  83. "Impedance" of the output transformer
  84. Triode-wired small signal pentode question
  85. Calculating output impedance
  86. 6JM6 Infomation for Pete Millett's DCPP Amp
  87. Tube labeld ETBB
  88. Heaters wiring help!
  89. What do you guys think of this IR volume control?
  90. Can you send me the Aikido 5687 user manual
  91. Cathode Follower output cap
  92. EL84 rebuild suggestions
  93. voltage divider in WE91 driver
  94. Power Tx Myth?
  95. voltage multiplier based on SS trafo - LONG
  96. What tube for QUIET phono pre??
  97. A&R 8ohm 4008 output transformer
  98. How does DRD Ultrapath Work?
  99. Russian 6H2p-E??
  100. Started work on my stereo 7027a PSE amp
  101. Mono Tube Comp for analog kick drum
  102. Line stage preamplifier
  103. Trying to select the Aikido components
  104. X-PRE musical fidelity preamp. need help modifying
  105. 6C33C & Borbely Question
  106. 12BH7A in common cathode
  107. Sneak Preview: 9 Band Active All Tube EQ
  108. Bought a set of Greenlee conduit punches for my latest project - WOW!
  109. "Universal" octal amplifier?
  110. MU follower - distortion
  111. lighting transformers 12V
  112. Chinese 6N3 preamp questions
  113. Why are Chinese preamp knockoffs so popular?
  114. 4K7 OPT suitable for 6550/KT88?
  115. Transformer question - 110 v and 25 v from 1 secondary?
  116. About loadline again, how to choose load and current
  117. Parallel Output Transformers
  118. 6SN7 / 6V6 power amp : very odd behavour
  119. HV mA Spec on Large RCA Power Xfmr?
  120. Is the Aikido too 'bright'?
  121. Has anyone put the Glassware phono & line amps in same box?
  122. High impedance balanced output: how long the cable?
  123. Data Sheets
  124. Can I use a LM317 bias on lower cathode of SRPP?
  125. AU-34 Output transformer replacement question
  126. The new KT120 from tungsol
  127. em83 questions
  128. Push-pull PCL84 schematic and a question
  129. confused on power transformer ratings
  130. C3g:GM70:GM70 schematic advice
  131. Can someone explain Load Lines?
  132. Humming from WCF but not SRPP
  133. Gas regulator tubes
  134. My B&K 707 sensitivity seems wonky
  135. Lowrey LC1 B schematic wanted
  136. Complete tube amp novice got a few questions!!
  137. jacked up the bias...WOW!
  138. Looking for PP 7027a shematic
  139. So, if it's not DIY Gene, then what?
  140. What driver tube for 200Vrms?
  141. Tube socket purchase
  142. Something I found interesting a while ago!
  143. Eico HF-22 Circuit
  144. SEDHT amp - decisions decisions
  145. Confused with designing
  146. Digitally controlled analog attenuator
  147. Purchased my 1st valve amp and can only get one channel working, please help!
  148. Another silly tube yesting question
  149. potentially very stupid questions....
  150. Tube rectifier: AZ1, AZ31, AZ50 vs 5u4
  151. Tube Square-Law, what and how to set up?
  152. Need help finding schematic. Conn 720
  153. OPT for parafeed SE
  154. Anyone else tried an opamp as a driver?
  155. e180f/6688 pentode operting points
  156. power supply reassignment problem
  157. Mains power transformer on S5 K-12 kit hums?
  158. Oriole OPT
  159. 26DQ5's vs 26HU5's vs 6KN6's and transformers
  160. SRPP power using power tranny as OPT?
  161. Need guidance with heathkit SA-2 refurbish/mods
  162. B+ discharge times!
  163. 26HU5's....and a confession
  164. Bell Sound Systems Pacemaker Model 2220
  165. Any thoughts on this transformer on eBay?
  166. Need some help figuring out a Wurlitzer 6240.
  167. Bypassing cathode resistor on pp power tube
  168. Is it safe to use a 8BQ5 in place of a 6BQ5 in a guitar amp?
  169. TRIODE Voltage amp + Power OP output follower
  170. Cats and tube-a-holics
  171. Replace Tube Rectifier With Weber CC?
  172. 717a 2 stage SE amplifier
  173. Thoughts on Oatley K282 Valve Preamp?
  174. SS rectifier for SimpleSE and others...
  175. Need match Pr KT-88
  176. EL34 PP - again !!!
  177. S5 K-12 Kit sounds excellent with iPod, but relatively low volume with turntable?
  178. Finished K-12 Kit with cedar / brass chassis (pics)
  179. Groove Tube Dual 75 schematics
  180. Tubes HOT!
  181. Meng volume pot problem
  182. Use P-P OPT for SE?
  183. Safety ?
  184. Film caps always better than lytics?
  185. Valve Preamp for voice / guitar purpose
  186. 851 set?
  187. dual cathode follower problem
  188. Question about connecting grounds
  189. Is it okay for capacitors to be close to the main power transformer in S5 K-12 Kit?
  190. Fisher 500C Schematic
  191. looking for PP 6l6 schematic
  192. Muiscal Paradise MP-301 6V6 amp.
  193. First Build - PS Voltage Question?
  194. Need help about an hybrid amp circuit
  195. Radio to guitaramp conversion hum problem
  196. Pioneer SX-348 - Service manual?
  197. Tube PS for mic preamp Help
  198. Add rectifier tube to yaqin mc10l? What size is best?
  199. global negative feedback schematic
  200. Signal transformer question
  201. What speaker system for tube amplifier
  202. 39/44 Tube
  203. tube-aholics anonymous ?
  204. 12AX7 heaters from 9VAC transformer
  205. Cant stop Aikido Humming
  206. Suggestions for rotary switches
  207. Question about potential transformer placement in K-12 Kit
  208. Extra pins on replacement potentiometer for K-12 tube kit?
  209. Instrument tube / valve preamp
  210. SRPP - issues understanding how to increase current
  211. ARC Power source+Marantz 7C(PCB edition)
  212. Repair and adjustment tips
  213. trimax output transformer TA2444
  214. anyone recognize this valve?
  215. Microphone Preamp design
  216. 6CM5 hi-fi amplifier
  217. Building an amp try #2
  218. Can the 6S33S/6C33C be mounted horizontally?
  219. A heptode question
  220. Looking for a 807 amp with 4 pairs of 807's
  221. pp output transformer miniblok2
  222. John Swenson's BDT preamp - finally!!
  223. Voice of Music console 816
  224. Steve Bench 1 tube reg in all glass
  225. Conn Caprice 427 needs new 12AU7 tubes—advice?
  226. Position of Iron in Can of HK Citation II Output Transformers
  227. Bottle size,does it matter in matched quads?
  228. Heater Pots?
  229. Current calculation from datasheet
  230. Any one ever seen this amp?
  231. Guiguang 300B for 300Beast.....
  232. FLEA PPP, all ecc99
  233. Well, it is time to start thinking about winter projects. GM70
  234. aghhh is my tube okay?
  235. Grid Bias provided by transformer secondary winding, what is this stuff about?
  236. Zener regulated supplies
  237. OPT fore drive ribbon speaker directly; why not ?
  238. van Dorn's Octode design - recommendations for a 10W/ch version
  239. Outrageous Speaker/Amplifier Idea
  240. Anyone ever made the EL84 P-P circuit referenced on the Tubecad Journal site?
  241. Scratchy volume pot on TAD DIY deluxe reverb
  242. Cathode Follower ideas please.....
  243. Anyone used the NTE1866 VU LED driver?
  244. Any potential problems when using a combo potentiometer / power switch on a K-12 kit?
  245. Help needed understanding component values.
  246. Separate passive pre and monoblocks?
  247. My new diy site
  248. Valves and musical instruments
  249. My DC Darling
  250. Question - add LED power indicator to Aikido pre

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