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  1. Yaqin SD-CD2 tube buffer - upgrading stock tubes
  2. 12v Tube amp
  3. Is this ok
  4. Help a newbie out with his Sherwood S-800iii
  5. A&R 4008 output transformers
  6. Kulish Circuit
  7. A little digression= read on
  8. Sweep tubes and G3
  9. CCS - Help!
  10. Question About High-Fidelity Magazine 195x - 196x
  11. The Heathkit MA-12 - A Mullard 5-10 In Disguise
  12. who have schematic of Phenix OTL G3?
  13. Drive requirements.....
  14. KT88 hybrid amplifier
  15. 2300 ohm vs 5000 ohm output trans question
  16. Has anyone used this regulator?
  17. Diy HiFi Supply Tram Mk2 DHT OTL Preamplifier
  18. Current mirror circuits
  19. splitter/driver stage
  20. Would someone explain this amp to me please?
  21. What am I experiencing?
  22. 6U10, 6AC10, 6D10, 6AV11
  23. My debut into the vacuum world: Yarland FV34B
  24. Resistor value tweaks for Radford STA35
  25. do you own a chinese tube integrate? does it.... smell?
  26. Needs help to find transformer
  27. 12AU7 / 12AX7 push-pull
  28. Subwoofer connection?
  29. Ultra-low Noise Valve Regulated PSU. How to?
  30. One channel has less glow
  31. 6l6 tube amp troubleshooring progress
  32. Baldwin organ transformers
  33. has anyone used a chip for an input driver to a 2A3 or the like??
  34. Good PSU for HT upt to 15mA??
  35. Edcor transformers have arrived, but really puzzled!
  36. Single tube, Single ended, 20W, impossible?
  37. Stan's Aikido Build
  38. Power transformer rating
  39. 7w 300b vs 350w Car audio observation (car loses)
  40. Seriously considering doing an OTL - but . .
  41. Emulating remote cut off
  42. Cheap Sakura Hybrid Tube Amp Modification
  43. screen tap on OPT
  44. Understanding Cathode Decoupling
  45. How to test interstage transformers?
  46. DIY Tube Mic
  47. Modified 6C33C
  48. Counterpoint SA-3.1 Rebuild
  49. 6V6 flare at start up
  50. Tube aging, in-circuit test?
  51. HV Regulator board
  52. What kind of top cap for 6V7G?
  53. High voltage and heat sinks
  54. GM-70 family with top cap anode?
  55. testing 8417's on mercury 1000
  56. 6N3 Tube Preamp with DC-DC converter
  57. Question About Worn Tubes
  58. help ID 4-500 old stock tubes
  59. 6SN7 SRPP preamp
  60. Reduced Heater voltage to reduce noise
  61. ECL82 monoblock 'spud' and a question
  62. Small Tube/SS hybrid amplifier design 9V
  63. Plate load impedance
  64. Dynaco 440 Transformer Cathode/Screen Taps 6P1P 6AQ5 UL transformer
  65. Good idle current for NOS 7868's
  66. 6N2P - WHAT THE?????????????
  67. Got an old Westinghouse radio today!!!
  68. Distinction between Driver and Output stages
  69. UL P/P KT88 Class A
  70. Problem with 12ax7 phono stage
  71. Was ist das?
  72. Rset values for IXYS IXTP01N100D
  73. Dutch Book
  74. Tube amplifier chassis damping
  75. How the heck do I solve this problem????
  76. Pentode to Triode Operation
  77. AbouT the PSU II simulator & the "Cockeyed Bridge"
  78. GM70 bias & IT ratio question
  79. Transformer or choke sealed with metal case
  80. Projector 6V6 Tube Amp rats nest p2p
  81. micro pre amp
  82. Aikido - calculating Rk for new tubes
  83. Steady thumping noise in preamp
  84. Leak Stereo 20 hum and buzz problem
  85. 5V AC maining for filaments
  86. Topology for Schade
  87. Thorsten 6SN7 Line stage.
  88. 12v B+ Tube buffer 12AX7
  89. 300B preamp - best operating point
  90. home made tube amp with 12v b+ how to build one?
  91. Engineer's Amp
  92. Show My Tube Headphone Amp [Add-On Modulars Design Supporting IPOD/IPHONE]
  93. FFT for adjusting tubes
  94. Voltage divider instead of expensive volume pot or stepped attenuator.
  95. Long-tail pair phase splitter
  96. LM317 calculator for filament circuit
  97. Self-Biased Cathode Follower Output Point
  98. filaments power supply
  99. Power tube buffer
  100. Easy Way To Reduce 251V to 235V?
  101. EL84 Push Pull 25-30 watts
  102. Exploded view of valves
  103. Show us you COMPACT tube amps !
  104. HV Regulator
  105. Help with my new system
  106. The 3W Hammond 125ASE output transformer
  107. Different brand valves
  108. quad el84 or PP el34
  109. to MC30 or not to MC30
  110. unbypassed cathode resistor
  111. Does this transformer work?
  112. Max grid resistance for GM70?
  113. Stacked power supply HELP!
  114. Parallel pwr supply chokes for add'l current?
  115. Need help to verify Amperex 7119's genuineness
  116. Need help/advice on a problem with console amplifier
  117. Getting started with my VERY FIRST project
  118. PCL Vintage Amp VA1956 - transformer issue
  119. Help to Identify
  120. 300B based preamp....looking for schematic
  121. RH84SE, use as headphone amp ?
  122. The New Yaqin/Music Angel/Meng & Others Discussion Thread
  123. Power triode bias by tube rectifier
  124. Two questions on IR volume control
  125. 25 watt output tube
  126. DC heating my 300b
  127. RNT-900 regulator
  128. KT61 Equivalent - Ping Waveborne
  129. Running a tube without heaters
  130. SE-BAL-SE Switching
  131. What makes is stereo?
  132. Triple Checking Calcs: metering bias with mA meter
  133. EL84 & 12AX7 Amp possibilities
  134. Weird issue with tube driver.
  135. 6E5P
  136. 6B4G / 6S4S Biasing Question
  137. Quick tube wear question
  138. Looking for a tube amp
  139. Internal placing of components
  140. Preamplifiers v power amplifiers
  141. LP2 dht driver
  142. hammond 1650
  143. Load For PSU
  144. *PING* Tubechimp
  145. Revamping of a Michaelson & Austin TVA-1
  146. 6V6 Behavior W/Fixed Bias (SE Amp)
  147. Low noise, low microphony, low hum valves
  148. 6L6 / 12AX7 push-pull
  149. bowei amp for audionote ax-2 speakers?
  150. Yet another Priboi thread...
  151. Help Old Radio Philips
  152. Distortion discussion from mosqueto Hybrid thread
  153. Sovtek 6N1P Microphonics
  154. ECC86 / 6GM8 Radio Receiver Help
  155. Los Angeles
  156. Op point for 6au6/6gu5 in P-G feedback 6550
  157. Tube Pre-Amp Schematic Needed
  158. find a YAQIN 5881a amplifier
  159. 11N90C in the SBCCS circuit
  160. Help replacing a PSU choke - How to choose choke
  161. does this look like a joke to you?
  162. Electronic Choke for Valve Amplifiers
  163. Sockets for a WE429A
  164. To bypass or not to bypass...
  165. DIY Curve Tracer
  166. 300B filament winding center tapped?
  167. help me decide,headphone amp - parafeed or normal tx ?
  168. 7060 vs 6AN8A
  169. Psu
  170. EDCOR Output transformer for 300B
  171. 80 or RGN1064 Scenario
  172. TUBENEWB - Quad KT88 Monoblocks
  173. CCS in Differential phase splitter?
  174. Need schematic for Smart 2x150vt
  175. Antek OPT
  176. 6DQ6 for audio power amp?
  177. Anyone identify this Mullard?
  178. My Mullard 5-20: some photos and a question
  179. Tube can work in low volt~~fix your knowledge
  180. A problem with a tube receiver
  181. Where I could find tube in San Jose
  182. 6Н30П spice model for MicroCap ?
  183. Transformer input and resonance
  184. GE6111 Preamplifier
  185. Where to buy audio tubes in Europe
  186. Play iPod into 1955 Record Player's Tube Amplifier
  187. To Schade it , or not..
  188. questions on input stage
  189. Planar/Lighthouse triodes for Audio?
  190. 211 SET 40W output design and mfg.
  191. Volume Control with Loudness and no Taps
  192. Use for 4k PP (non UL) OPT's?
  193. Filament Autobias
  194. Shelby NC Ham Fest
  195. 2A3 Spud
  196. Resistor as a load
  197. How to balance pushp pull DHT finals
  198. 240v to 220v
  199. Hammond 272 FX plate voltage
  200. Drawing Load Line for Parallel Output Tube
  201. question about swapping el34 for kt77 in my tube amp
  202. 6 volt recifier tubes
  203. Output transformer sizing...again...
  204. Voltage doubler using PSUII?
  205. Rectifier Tubes in SE Amps
  206. 6v6 SEP
  207. 1967 Pioneer SX-34, 11W, WORTH FIXING???
  208. Jumper Wire Gauge and Material for Phono Preamp?
  209. ecc99 - 6C19n PP, (6S19P)
  210. Strange HF distortion
  211. have a pair of 5k:8 OPTs lying around.. suggest me something to build?
  212. Early history of High Fidelity amplifiers
  213. Which pentode for input?
  214. 6n6p or 6P14P-ev for driver
  215. Old tranny - confused with windings
  216. Dynaco A-430 Vintage Output Transformers
  217. Output tube for 800 Ohm speaker?
  218. Today was the anual Tree Street Yard Sale event
  219. Florida ? what did I get ?
  220. 26HU5's vs 26DQ5's
  221. VoltCraft AT-400?
  222. Sonic differences: 45, 2A3, 300B, 845, 211
  223. Need help wiring a pot for cathode adjustment
  224. Sound of the 6SN7?
  225. A mystery device
  226. Plate curves... Ic2 & Ib?
  227. How to choke load for big voltage swings?
  228. 6550 SE design, please comment.
  229. "Impedance" of the output transformer
  230. Triode-wired small signal pentode question
  231. Calculating output impedance
  232. 6JM6 Infomation for Pete Millett's DCPP Amp
  233. Tube labeld ETBB
  234. Heaters wiring help!
  235. Can you send me the Aikido 5687 user manual
  236. Cathode Follower output cap
  237. EL84 rebuild suggestions
  238. voltage divider in WE91 driver
  239. Power Tx Myth?
  240. voltage multiplier based on SS trafo - LONG
  241. What tube for QUIET phono pre??
  242. A&R 8ohm 4008 output transformer
  243. How does DRD Ultrapath Work?
  244. Russian 6H2p-E??
  245. Started work on my stereo 7027a PSE amp
  246. Mono Tube Comp for analog kick drum
  247. Line stage preamplifier
  248. Trying to select the Aikido components
  249. X-PRE musical fidelity preamp. need help modifying
  250. 6C33C & Borbely Question

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