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  1. 6L6 / 12AX7 push-pull
  2. bowei amp for audionote ax-2 speakers?
  3. Yet another Priboi thread...
  4. Help Old Radio Philips
  5. Distortion discussion from mosqueto Hybrid thread
  6. Sovtek 6N1P Microphonics
  7. ECC86 / 6GM8 Radio Receiver Help
  8. Los Angeles
  9. Op point for 6au6/6gu5 in P-G feedback 6550
  10. Tube Pre-Amp Schematic Needed
  11. find a YAQIN 5881a amplifier
  12. 11N90C in the SBCCS circuit
  13. Help replacing a PSU choke - How to choose choke
  14. does this look like a joke to you?
  15. Electronic Choke for Valve Amplifiers
  16. Sockets for a WE429A
  17. To bypass or not to bypass...
  18. DIY Curve Tracer
  19. 300B filament winding center tapped?
  20. help me decide,headphone amp - parafeed or normal tx ?
  21. 7060 vs 6AN8A
  22. Psu
  23. Blackheart amp moding question
  24. EDCOR Output transformer for 300B
  25. 80 or RGN1064 Scenario
  26. TUBENEWB - Quad KT88 Monoblocks
  27. CCS in Differential phase splitter?
  28. Need schematic for Smart 2x150vt
  29. Antek OPT
  30. 6DQ6 for audio power amp?
  31. Anyone identify this Mullard?
  32. My Mullard 5-20: some photos and a question
  33. Tube can work in low volt~~fix your knowledge
  34. A problem with a tube receiver
  35. Auto Transformer - safety advice
  36. Where I could find tube in San Jose
  37. 6Н30П spice model for MicroCap ?
  38. Transformer input and resonance
  39. GE6111 Preamplifier
  40. Where to buy audio tubes in Europe
  41. Play iPod into 1955 Record Player's Tube Amplifier
  42. To Schade it , or not..
  43. questions on input stage
  44. Planar/Lighthouse triodes for Audio?
  45. The Best coupling cap..THEL??
  46. 211 SET 40W output design and mfg.
  47. Volume Control with Loudness and no Taps
  48. Use for 4k PP (non UL) OPT's?
  49. Heathkit Oscilloscope O-12
  50. Filament Autobias
  51. Shelby NC Ham Fest
  52. 2A3 Spud
  53. Resistor as a load
  54. How to balance pushp pull DHT finals
  55. 240v to 220v
  56. Hammond 272 FX plate voltage
  57. Drawing Load Line for Parallel Output Tube
  58. question about swapping el34 for kt77 in my tube amp
  59. 6 volt recifier tubes
  60. PSU Capacitor Selection
  61. Output transformer sizing...again...
  62. Power supply cabling
  63. Voltage doubler using PSUII?
  64. Rectifier Tubes in SE Amps
  65. 6v6 SEP
  66. 1967 Pioneer SX-34, 11W, WORTH FIXING???
  67. Jumper Wire Gauge and Material for Phono Preamp?
  68. Tube libraries for AutoTRAX wanted.
  69. DIY Layout Creator for Chassis Designs
  70. ecc99 - 6C19n PP, (6S19P)
  71. Dr Z Carmen Ghia build from a Hammond Reverb amp!!
  72. Strange HF distortion
  73. have a pair of 5k:8 OPTs lying around.. suggest me something to build?
  74. Marshall 1959 (Super Tremolo) repair help
  75. Early history of High Fidelity amplifiers
  76. Which pentode for input?
  77. 6n6p or 6P14P-ev for driver
  78. Old tranny - confused with windings
  79. Dynaco A-430 Vintage Output Transformers
  80. Output tube for 800 Ohm speaker?
  81. Today was the anual Tree Street Yard Sale event
  82. Florida ? what did I get ?
  83. 26HU5's vs 26DQ5's
  84. VoltCraft AT-400?
  85. Sonic differences: 45, 2A3, 300B, 845, 211
  86. Need help wiring a pot for cathode adjustment
  87. Sound of the 6SN7?
  88. A mystery device
  89. Plate curves... Ic2 & Ib?
  90. How to choke load for big voltage swings?
  91. 6550 SE design, please comment.
  92. "Impedance" of the output transformer
  93. Triode-wired small signal pentode question
  94. Calculating output impedance
  95. 6JM6 Infomation for Pete Millett's DCPP Amp
  96. Tube labeld ETBB
  97. Heaters wiring help!
  98. What do you guys think of this IR volume control?
  99. Can you send me the Aikido 5687 user manual
  100. Cathode Follower output cap
  101. EL84 rebuild suggestions
  102. voltage divider in WE91 driver
  103. Power Tx Myth?
  104. voltage multiplier based on SS trafo - LONG
  105. What tube for QUIET phono pre??
  106. A&R 8ohm 4008 output transformer
  107. How does DRD Ultrapath Work?
  108. Russian 6H2p-E??
  109. Started work on my stereo 7027a PSE amp
  110. Mono Tube Comp for analog kick drum
  111. Line stage preamplifier
  112. Trying to select the Aikido components
  113. X-PRE musical fidelity preamp. need help modifying
  114. 6C33C & Borbely Question
  115. 12BH7A in common cathode
  116. Sneak Preview: 9 Band Active All Tube EQ
  117. Bought a set of Greenlee conduit punches for my latest project - WOW!
  118. "Universal" octal amplifier?
  119. MU follower - distortion
  120. lighting transformers 12V
  121. Chinese 6N3 preamp questions
  122. Why are Chinese preamp knockoffs so popular?
  123. 4K7 OPT suitable for 6550/KT88?
  124. Transformer question - 110 v and 25 v from 1 secondary?
  125. About loadline again, how to choose load and current
  126. Parallel Output Transformers
  127. 6SN7 / 6V6 power amp : very odd behavour
  128. HV mA Spec on Large RCA Power Xfmr?
  129. Is the Aikido too 'bright'?
  130. Has anyone put the Glassware phono & line amps in same box?
  131. High impedance balanced output: how long the cable?
  132. Data Sheets
  133. Can I use a LM317 bias on lower cathode of SRPP?
  134. AU-34 Output transformer replacement question
  135. The new KT120 from tungsol
  136. em83 questions
  137. Push-pull PCL84 schematic and a question
  138. confused on power transformer ratings
  139. C3g:GM70:GM70 schematic advice
  140. Can someone explain Load Lines?
  141. Humming from WCF but not SRPP
  142. Gas regulator tubes
  143. My B&K 707 sensitivity seems wonky
  144. Lowrey LC1 B schematic wanted
  145. Complete tube amp novice got a few questions!!
  146. jacked up the bias...WOW!
  147. Looking for PP 7027a shematic
  148. So, if it's not DIY Gene, then what?
  149. What driver tube for 200Vrms?
  150. Tube socket purchase
  151. Something I found interesting a while ago!
  152. Eico HF-22 Circuit
  153. SEDHT amp - decisions decisions
  154. Confused with designing
  155. Digitally controlled analog attenuator
  156. Purchased my 1st valve amp and can only get one channel working, please help!
  157. Another silly tube yesting question
  158. potentially very stupid questions....
  159. Tube rectifier: AZ1, AZ31, AZ50 vs 5u4
  160. Tube Square-Law, what and how to set up?
  161. Need help finding schematic. Conn 720
  162. OPT for parafeed SE
  163. Anyone else tried an opamp as a driver?
  164. e180f/6688 pentode operting points
  165. power supply reassignment problem
  166. Mains power transformer on S5 K-12 kit hums?
  167. Oriole OPT
  168. 26DQ5's vs 26HU5's vs 6KN6's and transformers
  169. SRPP power using power tranny as OPT?
  170. Need guidance with heathkit SA-2 refurbish/mods
  171. B+ discharge times!
  172. 26HU5's....and a confession
  173. Bell Sound Systems Pacemaker Model 2220
  174. Any thoughts on this transformer on eBay?
  175. Need some help figuring out a Wurlitzer 6240.
  176. Bypassing cathode resistor on pp power tube
  177. Is it safe to use a 8BQ5 in place of a 6BQ5 in a guitar amp?
  178. TRIODE Voltage amp + Power OP output follower
  179. Cats and tube-a-holics
  180. Replace Tube Rectifier With Weber CC?
  181. 717a 2 stage SE amplifier
  182. Thoughts on Oatley K282 Valve Preamp?
  183. SS rectifier for SimpleSE and others...
  184. Need match Pr KT-88
  185. EL34 PP - again !!!
  186. S5 K-12 Kit sounds excellent with iPod, but relatively low volume with turntable?
  187. Finished K-12 Kit with cedar / brass chassis (pics)
  188. Groove Tube Dual 75 schematics
  189. Tubes HOT!
  190. Meng volume pot problem
  191. Use P-P OPT for SE?
  192. Safety ?
  193. Film caps always better than lytics?
  194. Valve Preamp for voice / guitar purpose
  195. 851 set?
  196. dual cathode follower problem
  197. Question about connecting grounds
  198. Is it okay for capacitors to be close to the main power transformer in S5 K-12 Kit?
  199. Fisher 500C Schematic
  200. looking for PP 6l6 schematic
  201. Muiscal Paradise MP-301 6V6 amp.
  202. First Build - PS Voltage Question?
  203. Need help about an hybrid amp circuit
  204. Radio to guitaramp conversion hum problem
  205. Pioneer SX-348 - Service manual?
  206. Tube PS for mic preamp Help
  207. Add rectifier tube to yaqin mc10l? What size is best?
  208. global negative feedback schematic
  209. Signal transformer question
  210. What speaker system for tube amplifier
  211. 39/44 Tube
  212. tube-aholics anonymous ?
  213. 12AX7 heaters from 9VAC transformer
  214. Cant stop Aikido Humming
  215. Suggestions for rotary switches
  216. Question about potential transformer placement in K-12 Kit
  217. Extra pins on replacement potentiometer for K-12 tube kit?
  218. Instrument tube / valve preamp
  219. SRPP - issues understanding how to increase current
  220. ARC Power source+Marantz 7C(PCB edition)
  221. Repair and adjustment tips
  222. trimax output transformer TA2444
  223. anyone recognize this valve?
  224. Microphone Preamp design
  225. 6CM5 hi-fi amplifier
  226. Building an amp try #2
  227. Can the 6S33S/6C33C be mounted horizontally?
  228. A heptode question
  229. Looking for a 807 amp with 4 pairs of 807's
  230. pp output transformer miniblok2
  231. John Swenson's BDT preamp - finally!!
  232. Voice of Music console 816
  233. Steve Bench 1 tube reg in all glass
  234. Conn Caprice 427 needs new 12AU7 tubes—advice?
  235. Position of Iron in Can of HK Citation II Output Transformers
  236. Bottle size,does it matter in matched quads?
  237. Heater Pots?
  238. Current calculation from datasheet
  239. Any one ever seen this amp?
  240. Guiguang 300B for 300Beast.....
  241. FLEA PPP, all ecc99
  242. Well, it is time to start thinking about winter projects. GM70
  243. aghhh is my tube okay?
  244. Grid Bias provided by transformer secondary winding, what is this stuff about?
  245. Zener regulated supplies
  246. OPT fore drive ribbon speaker directly; why not ?
  247. van Dorn's Octode design - recommendations for a 10W/ch version
  248. Outrageous Speaker/Amplifier Idea
  249. Anyone ever made the EL84 P-P circuit referenced on the Tubecad Journal site?
  250. Scratchy volume pot on TAD DIY deluxe reverb

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