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  1. Stan's Aikido Build
  2. Power transformer rating
  3. 7w 300b vs 350w Car audio observation (car loses)
  4. Seriously considering doing an OTL - but . .
  5. Emulating remote cut off
  6. Cheap Sakura Hybrid Tube Amp Modification
  7. screen tap on OPT
  8. Understanding Cathode Decoupling
  9. How to test interstage transformers?
  10. DIY Tube Mic
  11. Modified 6C33C
  12. Counterpoint SA-3.1 Rebuild
  13. 6V6 flare at start up
  14. Tube aging, in-circuit test?
  15. HV Regulator board
  16. What kind of top cap for 6V7G?
  17. Changing bass amp output transformer
  18. First timer wood chassis hints
  19. High voltage and heat sinks
  20. GM-70 family with top cap anode?
  21. testing 8417's on mercury 1000
  22. 6N3 Tube Preamp with DC-DC converter
  23. Question About Worn Tubes
  24. help ID 4-500 old stock tubes
  25. 6SN7 SRPP preamp
  26. Reduced Heater voltage to reduce noise
  27. ECL82 monoblock 'spud' and a question
  28. Small Tube/SS hybrid amplifier design 9V
  29. Gibson PA Amp
  30. Plate load impedance
  31. Dynaco 440 Transformer Cathode/Screen Taps 6P1P 6AQ5 UL transformer
  32. Good idle current for NOS 7868's
  33. 6N2P - WHAT THE?????????????
  34. Got an old Westinghouse radio today!!!
  35. Distinction between Driver and Output stages
  36. Need a decent chassis punch set
  37. UL P/P KT88 Class A
  38. Problem with 12ax7 phono stage
  39. LA2A parts, T4B spare
  40. Was ist das?
  41. Rset values for IXYS IXTP01N100D
  42. Dutch Book
  43. Tube amplifier chassis damping
  44. How the heck do I solve this problem????
  45. Pentode to Triode Operation
  46. AbouT the PSU II simulator & the "Cockeyed Bridge"
  47. GM70 bias & IT ratio question
  48. Transformer or choke sealed with metal case
  49. Peavy windsor tube head issue
  50. Projector 6V6 Tube Amp rats nest p2p
  51. micro pre amp
  52. Aikido - calculating Rk for new tubes
  53. Steady thumping noise in preamp
  54. Leak Stereo 20 hum and buzz problem
  55. 5V AC maining for filaments
  56. Topology for Schade
  57. Thorsten 6SN7 Line stage.
  58. 12v B+ Tube buffer 12AX7
  59. 300B preamp - best operating point
  60. home made tube amp with 12v b+ how to build one?
  61. Engineer's Amp
  62. Show My Tube Headphone Amp [Add-On Modulars Design Supporting IPOD/IPHONE]
  63. FFT for adjusting tubes
  64. Music to soothe the savage tubes.
  65. Voltage divider instead of expensive volume pot or stepped attenuator.
  66. Question about Hickok 539C
  67. Long-tail pair phase splitter
  68. LM317 calculator for filament circuit
  69. Self-Biased Cathode Follower Output Point
  70. filaments power supply
  71. Power tube buffer
  72. Latching Switch Assemblies
  73. Easy Way To Reduce 251V to 235V?
  74. EL84 Push Pull 25-30 watts
  75. Exploded view of valves
  76. Infineon BSP135 depletion mode mosfet
  77. Show us you COMPACT tube amps !
  78. HV Regulator
  79. Help with my new system
  80. Anything similar to the RNT900 regulator?
  81. The 3W Hammond 125ASE output transformer
  82. Carbon Comp vs Metal Film
  83. Different brand valves
  84. Buzz In Guitar Amp
  85. quad el84 or PP el34
  86. Inexpensive wire source
  87. to MC30 or not to MC30
  88. unbypassed cathode resistor
  89. Supro Golden Holiday Schematic Needed
  90. Does this transformer work?
  91. Max grid resistance for GM70?
  92. Stacked power supply HELP!
  93. Parallel pwr supply chokes for add'l current?
  94. Need help to verify Amperex 7119's genuineness
  95. Need help/advice on a problem with console amplifier
  96. Getting started with my VERY FIRST project
  97. PCL Vintage Amp VA1956 - transformer issue
  98. Help to Identify
  99. 300B based preamp....looking for schematic
  100. USB Oscilloscope
  101. RH84SE, use as headphone amp ?
  102. The New Yaqin/Music Angel/Meng & Others Discussion Thread
  103. Power triode bias by tube rectifier
  104. Two questions on IR volume control
  105. 25 watt output tube
  106. DC heating my 300b
  107. RNT-900 regulator
  108. KT61 Equivalent - Ping Waveborne
  109. EICO 666 meter needle moves too fast/pegs too hard...help?
  110. Eico 666 meter movement speed help
  111. Running a tube without heaters
  112. SE-BAL-SE Switching
  113. What makes is stereo?
  114. Triple Checking Calcs: metering bias with mA meter
  115. EL84 & 12AX7 Amp possibilities
  116. Weird issue with tube driver.
  117. 6E5P
  118. 6B4G / 6S4S Biasing Question
  119. Quick tube wear question
  120. Looking for a tube amp
  121. Internal placing of components
  122. Preamplifiers v power amplifiers
  123. LP2 dht driver
  124. hammond 1650
  125. reverb
  126. Load For PSU
  127. *PING* Tubechimp
  128. Revamping of a Michaelson & Austin TVA-1
  129. 6V6 Behavior W/Fixed Bias (SE Amp)
  130. Low noise, low microphony, low hum valves
  131. 6L6 / 12AX7 push-pull
  132. bowei amp for audionote ax-2 speakers?
  133. Yet another Priboi thread...
  134. Help Old Radio Philips
  135. Distortion discussion from mosqueto Hybrid thread
  136. Sovtek 6N1P Microphonics
  137. ECC86 / 6GM8 Radio Receiver Help
  138. Los Angeles
  139. Op point for 6au6/6gu5 in P-G feedback 6550
  140. Tube Pre-Amp Schematic Needed
  141. find a YAQIN 5881a amplifier
  142. 11N90C in the SBCCS circuit
  143. Help replacing a PSU choke - How to choose choke
  144. does this look like a joke to you?
  145. Electronic Choke for Valve Amplifiers
  146. Sockets for a WE429A
  147. To bypass or not to bypass...
  148. DIY Curve Tracer
  149. 300B filament winding center tapped?
  150. help me decide,headphone amp - parafeed or normal tx ?
  151. 7060 vs 6AN8A
  152. Psu
  153. Blackheart amp moding question
  154. EDCOR Output transformer for 300B
  155. 80 or RGN1064 Scenario
  156. TUBENEWB - Quad KT88 Monoblocks
  157. CCS in Differential phase splitter?
  158. Need schematic for Smart 2x150vt
  159. Antek OPT
  160. 6DQ6 for audio power amp?
  161. Anyone identify this Mullard?
  162. My Mullard 5-20: some photos and a question
  163. Tube can work in low volt~~fix your knowledge
  164. A problem with a tube receiver
  165. Auto Transformer - safety advice
  166. Where I could find tube in San Jose
  167. 6Н30П spice model for MicroCap ?
  168. Transformer input and resonance
  169. GE6111 Preamplifier
  170. Where to buy audio tubes in Europe
  171. Play iPod into 1955 Record Player's Tube Amplifier
  172. To Schade it , or not..
  173. questions on input stage
  174. Planar/Lighthouse triodes for Audio?
  175. The Best coupling cap..THEL??
  176. 211 SET 40W output design and mfg.
  177. Volume Control with Loudness and no Taps
  178. Use for 4k PP (non UL) OPT's?
  179. Heathkit Oscilloscope O-12
  180. Filament Autobias
  181. Shelby NC Ham Fest
  182. 2A3 Spud
  183. Resistor as a load
  184. How to balance pushp pull DHT finals
  185. 240v to 220v
  186. Hammond 272 FX plate voltage
  187. Drawing Load Line for Parallel Output Tube
  188. question about swapping el34 for kt77 in my tube amp
  189. 6 volt recifier tubes
  190. PSU Capacitor Selection
  191. Output transformer sizing...again...
  192. Power supply cabling
  193. Voltage doubler using PSUII?
  194. Rectifier Tubes in SE Amps
  195. 6v6 SEP
  196. 1967 Pioneer SX-34, 11W, WORTH FIXING???
  197. Jumper Wire Gauge and Material for Phono Preamp?
  198. Tube libraries for AutoTRAX wanted.
  199. DIY Layout Creator for Chassis Designs
  200. ecc99 - 6C19n PP, (6S19P)
  201. Dr Z Carmen Ghia build from a Hammond Reverb amp!!
  202. Strange HF distortion
  203. have a pair of 5k:8 OPTs lying around.. suggest me something to build?
  204. Marshall 1959 (Super Tremolo) repair help
  205. Early history of High Fidelity amplifiers
  206. Which pentode for input?
  207. 6n6p or 6P14P-ev for driver
  208. Old tranny - confused with windings
  209. Dynaco A-430 Vintage Output Transformers
  210. Output tube for 800 Ohm speaker?
  211. Today was the anual Tree Street Yard Sale event
  212. Florida ? what did I get ?
  213. 26HU5's vs 26DQ5's
  214. VoltCraft AT-400?
  215. Sonic differences: 45, 2A3, 300B, 845, 211
  216. Need help wiring a pot for cathode adjustment
  217. Sound of the 6SN7?
  218. A mystery device
  219. Plate curves... Ic2 & Ib?
  220. How to choke load for big voltage swings?
  221. 6550 SE design, please comment.
  222. "Impedance" of the output transformer
  223. Triode-wired small signal pentode question
  224. Calculating output impedance
  225. 6JM6 Infomation for Pete Millett's DCPP Amp
  226. Tube labeld ETBB
  227. Heaters wiring help!
  228. What do you guys think of this IR volume control?
  229. Can you send me the Aikido 5687 user manual
  230. Cathode Follower output cap
  231. EL84 rebuild suggestions
  232. voltage divider in WE91 driver
  233. Power Tx Myth?
  234. voltage multiplier based on SS trafo - LONG
  235. What tube for QUIET phono pre??
  236. A&R 8ohm 4008 output transformer
  237. How does DRD Ultrapath Work?
  238. Russian 6H2p-E??
  239. Started work on my stereo 7027a PSE amp
  240. Mono Tube Comp for analog kick drum
  241. Line stage preamplifier
  242. Trying to select the Aikido components
  243. X-PRE musical fidelity preamp. need help modifying
  244. 6C33C & Borbely Question
  245. 12BH7A in common cathode
  246. Sneak Preview: 9 Band Active All Tube EQ
  247. Bought a set of Greenlee conduit punches for my latest project - WOW!
  248. "Universal" octal amplifier?
  249. MU follower - distortion
  250. lighting transformers 12V

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