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  1. Problem with 12ax7 phono stage
  2. LA2A parts, T4B spare
  3. Was ist das?
  4. Rset values for IXYS IXTP01N100D
  5. Dutch Book
  6. Tube amplifier chassis damping
  7. How the heck do I solve this problem????
  8. Pentode to Triode Operation
  9. AbouT the PSU II simulator & the "Cockeyed Bridge"
  10. GM70 bias & IT ratio question
  11. Transformer or choke sealed with metal case
  12. Peavy windsor tube head issue
  13. Projector 6V6 Tube Amp rats nest p2p
  14. micro pre amp
  15. Aikido - calculating Rk for new tubes
  16. Steady thumping noise in preamp
  17. Leak Stereo 20 hum and buzz problem
  18. 5V AC maining for filaments
  19. Topology for Schade
  20. Thorsten 6SN7 Line stage.
  21. 12v B+ Tube buffer 12AX7
  22. 300B preamp - best operating point
  23. home made tube amp with 12v b+ how to build one?
  24. Engineer's Amp
  25. Show My Tube Headphone Amp [Add-On Modulars Design Supporting IPOD/IPHONE]
  26. FFT for adjusting tubes
  27. Music to soothe the savage tubes.
  28. Voltage divider instead of expensive volume pot or stepped attenuator.
  29. Question about Hickok 539C
  30. Long-tail pair phase splitter
  31. LM317 calculator for filament circuit
  32. Self-Biased Cathode Follower Output Point
  33. filaments power supply
  34. Power tube buffer
  35. Latching Switch Assemblies
  36. Easy Way To Reduce 251V to 235V?
  37. EL84 Push Pull 25-30 watts
  38. Exploded view of valves
  39. Infineon BSP135 depletion mode mosfet
  40. Show us you COMPACT tube amps !
  41. HV Regulator
  42. Help with my new system
  43. Anything similar to the RNT900 regulator?
  44. The 3W Hammond 125ASE output transformer
  45. Carbon Comp vs Metal Film
  46. Different brand valves
  47. Buzz In Guitar Amp
  48. quad el84 or PP el34
  49. Inexpensive wire source
  50. to MC30 or not to MC30
  51. unbypassed cathode resistor
  52. Supro Golden Holiday Schematic Needed
  53. Does this transformer work?
  54. Max grid resistance for GM70?
  55. Stacked power supply HELP!
  56. Parallel pwr supply chokes for add'l current?
  57. Need help to verify Amperex 7119's genuineness
  58. Need help/advice on a problem with console amplifier
  59. Getting started with my VERY FIRST project
  60. PCL Vintage Amp VA1956 - transformer issue
  61. Help to Identify
  62. 300B based preamp....looking for schematic
  63. USB Oscilloscope
  64. RH84SE, use as headphone amp ?
  65. The New Yaqin/Music Angel/Meng & Others Discussion Thread
  66. Power triode bias by tube rectifier
  67. Two questions on IR volume control
  68. 25 watt output tube
  69. DC heating my 300b
  70. RNT-900 regulator
  71. KT61 Equivalent - Ping Waveborne
  72. EICO 666 meter needle moves too fast/pegs too hard...help?
  73. Eico 666 meter movement speed help
  74. Running a tube without heaters
  75. SE-BAL-SE Switching
  76. What makes is stereo?
  77. Triple Checking Calcs: metering bias with mA meter
  78. EL84 & 12AX7 Amp possibilities
  79. Weird issue with tube driver.
  80. 6E5P
  81. 6B4G / 6S4S Biasing Question
  82. Quick tube wear question
  83. Looking for a tube amp
  84. Internal placing of components
  85. Preamplifiers v power amplifiers
  86. LP2 dht driver
  87. hammond 1650
  88. reverb
  89. Load For PSU
  90. *PING* Tubechimp
  91. Revamping of a Michaelson & Austin TVA-1
  92. 6V6 Behavior W/Fixed Bias (SE Amp)
  93. Low noise, low microphony, low hum valves
  94. 6L6 / 12AX7 push-pull
  95. bowei amp for audionote ax-2 speakers?
  96. Yet another Priboi thread...
  97. Help Old Radio Philips
  98. Distortion discussion from mosqueto Hybrid thread
  99. Sovtek 6N1P Microphonics
  100. ECC86 / 6GM8 Radio Receiver Help
  101. Los Angeles
  102. Op point for 6au6/6gu5 in P-G feedback 6550
  103. Tube Pre-Amp Schematic Needed
  104. find a YAQIN 5881a amplifier
  105. 11N90C in the SBCCS circuit
  106. Help replacing a PSU choke - How to choose choke
  107. does this look like a joke to you?
  108. Electronic Choke for Valve Amplifiers
  109. Sockets for a WE429A
  110. To bypass or not to bypass...
  111. DIY Curve Tracer
  112. 300B filament winding center tapped?
  113. help me decide,headphone amp - parafeed or normal tx ?
  114. 7060 vs 6AN8A
  115. Psu
  116. Blackheart amp moding question
  117. EDCOR Output transformer for 300B
  118. 80 or RGN1064 Scenario
  119. TUBENEWB - Quad KT88 Monoblocks
  120. CCS in Differential phase splitter?
  121. Need schematic for Smart 2x150vt
  122. Antek OPT
  123. 6DQ6 for audio power amp?
  124. Anyone identify this Mullard?
  125. My Mullard 5-20: some photos and a question
  126. Tube can work in low volt~~fix your knowledge
  127. A problem with a tube receiver
  128. Auto Transformer - safety advice
  129. Where I could find tube in San Jose
  130. 6Н30П spice model for MicroCap ?
  131. Transformer input and resonance
  132. GE6111 Preamplifier
  133. Where to buy audio tubes in Europe
  134. Play iPod into 1955 Record Player's Tube Amplifier
  135. To Schade it , or not..
  136. questions on input stage
  137. Planar/Lighthouse triodes for Audio?
  138. The Best coupling cap..THEL??
  139. 211 SET 40W output design and mfg.
  140. Volume Control with Loudness and no Taps
  141. Use for 4k PP (non UL) OPT's?
  142. Heathkit Oscilloscope O-12
  143. Filament Autobias
  144. Shelby NC Ham Fest
  145. 2A3 Spud
  146. Resistor as a load
  147. How to balance pushp pull DHT finals
  148. 240v to 220v
  149. Hammond 272 FX plate voltage
  150. Drawing Load Line for Parallel Output Tube
  151. question about swapping el34 for kt77 in my tube amp
  152. 6 volt recifier tubes
  153. PSU Capacitor Selection
  154. Output transformer sizing...again...
  155. Power supply cabling
  156. Voltage doubler using PSUII?
  157. Rectifier Tubes in SE Amps
  158. 6v6 SEP
  159. 1967 Pioneer SX-34, 11W, WORTH FIXING???
  160. Jumper Wire Gauge and Material for Phono Preamp?
  161. Tube libraries for AutoTRAX wanted.
  162. DIY Layout Creator for Chassis Designs
  163. ecc99 - 6C19n PP, (6S19P)
  164. Dr Z Carmen Ghia build from a Hammond Reverb amp!!
  165. Strange HF distortion
  166. have a pair of 5k:8 OPTs lying around.. suggest me something to build?
  167. Marshall 1959 (Super Tremolo) repair help
  168. Early history of High Fidelity amplifiers
  169. Which pentode for input?
  170. 6n6p or 6P14P-ev for driver
  171. Old tranny - confused with windings
  172. Dynaco A-430 Vintage Output Transformers
  173. Output tube for 800 Ohm speaker?
  174. Today was the anual Tree Street Yard Sale event
  175. Florida ? what did I get ?
  176. 26HU5's vs 26DQ5's
  177. VoltCraft AT-400?
  178. Sonic differences: 45, 2A3, 300B, 845, 211
  179. Need help wiring a pot for cathode adjustment
  180. Sound of the 6SN7?
  181. A mystery device
  182. Plate curves... Ic2 & Ib?
  183. How to choke load for big voltage swings?
  184. 6550 SE design, please comment.
  185. "Impedance" of the output transformer
  186. Triode-wired small signal pentode question
  187. Calculating output impedance
  188. 6JM6 Infomation for Pete Millett's DCPP Amp
  189. Tube labeld ETBB
  190. Heaters wiring help!
  191. What do you guys think of this IR volume control?
  192. Can you send me the Aikido 5687 user manual
  193. Cathode Follower output cap
  194. EL84 rebuild suggestions
  195. voltage divider in WE91 driver
  196. Power Tx Myth?
  197. voltage multiplier based on SS trafo - LONG
  198. What tube for QUIET phono pre??
  199. A&R 8ohm 4008 output transformer
  200. How does DRD Ultrapath Work?
  201. Russian 6H2p-E??
  202. Started work on my stereo 7027a PSE amp
  203. Mono Tube Comp for analog kick drum
  204. Line stage preamplifier
  205. Trying to select the Aikido components
  206. X-PRE musical fidelity preamp. need help modifying
  207. 6C33C & Borbely Question
  208. 12BH7A in common cathode
  209. Sneak Preview: 9 Band Active All Tube EQ
  210. Bought a set of Greenlee conduit punches for my latest project - WOW!
  211. "Universal" octal amplifier?
  212. MU follower - distortion
  213. lighting transformers 12V
  214. Chinese 6N3 preamp questions
  215. Why are Chinese preamp knockoffs so popular?
  216. 4K7 OPT suitable for 6550/KT88?
  217. Transformer question - 110 v and 25 v from 1 secondary?
  218. About loadline again, how to choose load and current
  219. Parallel Output Transformers
  220. 6SN7 / 6V6 power amp : very odd behavour
  221. HV mA Spec on Large RCA Power Xfmr?
  222. Is the Aikido too 'bright'?
  223. Has anyone put the Glassware phono & line amps in same box?
  224. High impedance balanced output: how long the cable?
  225. Data Sheets
  226. Can I use a LM317 bias on lower cathode of SRPP?
  227. AU-34 Output transformer replacement question
  228. The new KT120 from tungsol
  229. em83 questions
  230. Push-pull PCL84 schematic and a question
  231. confused on power transformer ratings
  232. C3g:GM70:GM70 schematic advice
  233. Can someone explain Load Lines?
  234. Humming from WCF but not SRPP
  235. Gas regulator tubes
  236. My B&K 707 sensitivity seems wonky
  237. Lowrey LC1 B schematic wanted
  238. Complete tube amp novice got a few questions!!
  239. jacked up the bias...WOW!
  240. Looking for PP 7027a shematic
  241. So, if it's not DIY Gene, then what?
  242. What driver tube for 200Vrms?
  243. Tube socket purchase
  244. Something I found interesting a while ago!
  245. Eico HF-22 Circuit
  246. SEDHT amp - decisions decisions
  247. Confused with designing
  248. Digitally controlled analog attenuator
  249. Purchased my 1st valve amp and can only get one channel working, please help!
  250. Another silly tube yesting question

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