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

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