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  1. How the heck do I solve this problem????
  2. Pentode to Triode Operation
  3. AbouT the PSU II simulator & the "Cockeyed Bridge"
  4. GM70 bias & IT ratio question
  5. Transformer or choke sealed with metal case
  6. Peavy windsor tube head issue
  7. Projector 6V6 Tube Amp rats nest p2p
  8. micro pre amp
  9. Aikido - calculating Rk for new tubes
  10. Steady thumping noise in preamp
  11. Leak Stereo 20 hum and buzz problem
  12. 5V AC maining for filaments
  13. Topology for Schade
  14. Thorsten 6SN7 Line stage.
  15. 12v B+ Tube buffer 12AX7
  16. 300B preamp - best operating point
  17. home made tube amp with 12v b+ how to build one?
  18. Engineer's Amp
  19. Show My Tube Headphone Amp [Add-On Modulars Design Supporting IPOD/IPHONE]
  20. FFT for adjusting tubes
  21. Music to soothe the savage tubes.
  22. Voltage divider instead of expensive volume pot or stepped attenuator.
  23. Question about Hickok 539C
  24. Long-tail pair phase splitter
  25. LM317 calculator for filament circuit
  26. Self-Biased Cathode Follower Output Point
  27. filaments power supply
  28. Power tube buffer
  29. Latching Switch Assemblies
  30. Easy Way To Reduce 251V to 235V?
  31. EL84 Push Pull 25-30 watts
  32. Exploded view of valves
  33. Infineon BSP135 depletion mode mosfet
  34. Show us you COMPACT tube amps !
  35. HV Regulator
  36. Help with my new system
  37. Anything similar to the RNT900 regulator?
  38. The 3W Hammond 125ASE output transformer
  39. Carbon Comp vs Metal Film
  40. Different brand valves
  41. Buzz In Guitar Amp
  42. quad el84 or PP el34
  43. Inexpensive wire source
  44. to MC30 or not to MC30
  45. unbypassed cathode resistor
  46. Supro Golden Holiday Schematic Needed
  47. Does this transformer work?
  48. Max grid resistance for GM70?
  49. Stacked power supply HELP!
  50. Parallel pwr supply chokes for add'l current?
  51. Need help to verify Amperex 7119's genuineness
  52. Need help/advice on a problem with console amplifier
  53. Getting started with my VERY FIRST project
  54. PCL Vintage Amp VA1956 - transformer issue
  55. Help to Identify
  56. 300B based preamp....looking for schematic
  57. USB Oscilloscope
  58. RH84SE, use as headphone amp ?
  59. The New Yaqin/Music Angel/Meng & Others Discussion Thread
  60. Power triode bias by tube rectifier
  61. Two questions on IR volume control
  62. 25 watt output tube
  63. DC heating my 300b
  64. RNT-900 regulator
  65. KT61 Equivalent - Ping Waveborne
  66. EICO 666 meter needle moves too fast/pegs too hard...help?
  67. Eico 666 meter movement speed help
  68. Running a tube without heaters
  69. SE-BAL-SE Switching
  70. What makes is stereo?
  71. Triple Checking Calcs: metering bias with mA meter
  72. EL84 & 12AX7 Amp possibilities
  73. Weird issue with tube driver.
  74. 6E5P
  75. 6B4G / 6S4S Biasing Question
  76. Quick tube wear question
  77. Looking for a tube amp
  78. Internal placing of components
  79. Preamplifiers v power amplifiers
  80. LP2 dht driver
  81. hammond 1650
  82. reverb
  83. Load For PSU
  84. *PING* Tubechimp
  85. Revamping of a Michaelson & Austin TVA-1
  86. 6V6 Behavior W/Fixed Bias (SE Amp)
  87. Low noise, low microphony, low hum valves
  88. 6L6 / 12AX7 push-pull
  89. bowei amp for audionote ax-2 speakers?
  90. Yet another Priboi thread...
  91. Help Old Radio Philips
  92. Distortion discussion from mosqueto Hybrid thread
  93. Sovtek 6N1P Microphonics
  94. ECC86 / 6GM8 Radio Receiver Help
  95. Los Angeles
  96. Op point for 6au6/6gu5 in P-G feedback 6550
  97. Tube Pre-Amp Schematic Needed
  98. find a YAQIN 5881a amplifier
  99. 11N90C in the SBCCS circuit
  100. Help replacing a PSU choke - How to choose choke
  101. does this look like a joke to you?
  102. Electronic Choke for Valve Amplifiers
  103. Sockets for a WE429A
  104. To bypass or not to bypass...
  105. DIY Curve Tracer
  106. 300B filament winding center tapped?
  107. help me decide,headphone amp - parafeed or normal tx ?
  108. 7060 vs 6AN8A
  109. Psu
  110. Blackheart amp moding question
  111. EDCOR Output transformer for 300B
  112. 80 or RGN1064 Scenario
  113. TUBENEWB - Quad KT88 Monoblocks
  114. CCS in Differential phase splitter?
  115. Need schematic for Smart 2x150vt
  116. Antek OPT
  117. 6DQ6 for audio power amp?
  118. Anyone identify this Mullard?
  119. My Mullard 5-20: some photos and a question
  120. Tube can work in low volt~~fix your knowledge
  121. A problem with a tube receiver
  122. Auto Transformer - safety advice
  123. Where I could find tube in San Jose
  124. 6Н30П spice model for MicroCap ?
  125. Transformer input and resonance
  126. GE6111 Preamplifier
  127. Where to buy audio tubes in Europe
  128. Play iPod into 1955 Record Player's Tube Amplifier
  129. To Schade it , or not..
  130. questions on input stage
  131. Planar/Lighthouse triodes for Audio?
  132. The Best coupling cap..THEL??
  133. 211 SET 40W output design and mfg.
  134. Volume Control with Loudness and no Taps
  135. Use for 4k PP (non UL) OPT's?
  136. Heathkit Oscilloscope O-12
  137. Filament Autobias
  138. Shelby NC Ham Fest
  139. 2A3 Spud
  140. Resistor as a load
  141. How to balance pushp pull DHT finals
  142. 240v to 220v
  143. Hammond 272 FX plate voltage
  144. Drawing Load Line for Parallel Output Tube
  145. question about swapping el34 for kt77 in my tube amp
  146. 6 volt recifier tubes
  147. PSU Capacitor Selection
  148. Output transformer sizing...again...
  149. Power supply cabling
  150. Voltage doubler using PSUII?
  151. Rectifier Tubes in SE Amps
  152. 6v6 SEP
  153. 1967 Pioneer SX-34, 11W, WORTH FIXING???
  154. Jumper Wire Gauge and Material for Phono Preamp?
  155. Tube libraries for AutoTRAX wanted.
  156. DIY Layout Creator for Chassis Designs
  157. ecc99 - 6C19n PP, (6S19P)
  158. Dr Z Carmen Ghia build from a Hammond Reverb amp!!
  159. Strange HF distortion
  160. have a pair of 5k:8 OPTs lying around.. suggest me something to build?
  161. Marshall 1959 (Super Tremolo) repair help
  162. Early history of High Fidelity amplifiers
  163. Which pentode for input?
  164. 6n6p or 6P14P-ev for driver
  165. Old tranny - confused with windings
  166. Dynaco A-430 Vintage Output Transformers
  167. Output tube for 800 Ohm speaker?
  168. Today was the anual Tree Street Yard Sale event
  169. Florida ? what did I get ?
  170. 26HU5's vs 26DQ5's
  171. VoltCraft AT-400?
  172. Sonic differences: 45, 2A3, 300B, 845, 211
  173. Need help wiring a pot for cathode adjustment
  174. Sound of the 6SN7?
  175. A mystery device
  176. Plate curves... Ic2 & Ib?
  177. How to choke load for big voltage swings?
  178. 6550 SE design, please comment.
  179. "Impedance" of the output transformer
  180. Triode-wired small signal pentode question
  181. Calculating output impedance
  182. 6JM6 Infomation for Pete Millett's DCPP Amp
  183. Tube labeld ETBB
  184. Heaters wiring help!
  185. What do you guys think of this IR volume control?
  186. Can you send me the Aikido 5687 user manual
  187. Cathode Follower output cap
  188. EL84 rebuild suggestions
  189. voltage divider in WE91 driver
  190. Power Tx Myth?
  191. voltage multiplier based on SS trafo - LONG
  192. What tube for QUIET phono pre??
  193. A&R 8ohm 4008 output transformer
  194. How does DRD Ultrapath Work?
  195. Russian 6H2p-E??
  196. Started work on my stereo 7027a PSE amp
  197. Mono Tube Comp for analog kick drum
  198. Line stage preamplifier
  199. Trying to select the Aikido components
  200. X-PRE musical fidelity preamp. need help modifying
  201. 6C33C & Borbely Question
  202. 12BH7A in common cathode
  203. Sneak Preview: 9 Band Active All Tube EQ
  204. Bought a set of Greenlee conduit punches for my latest project - WOW!
  205. "Universal" octal amplifier?
  206. MU follower - distortion
  207. lighting transformers 12V
  208. Chinese 6N3 preamp questions
  209. Why are Chinese preamp knockoffs so popular?
  210. 4K7 OPT suitable for 6550/KT88?
  211. Transformer question - 110 v and 25 v from 1 secondary?
  212. About loadline again, how to choose load and current
  213. Parallel Output Transformers
  214. 6SN7 / 6V6 power amp : very odd behavour
  215. HV mA Spec on Large RCA Power Xfmr?
  216. Is the Aikido too 'bright'?
  217. Has anyone put the Glassware phono & line amps in same box?
  218. High impedance balanced output: how long the cable?
  219. Data Sheets
  220. Can I use a LM317 bias on lower cathode of SRPP?
  221. AU-34 Output transformer replacement question
  222. The new KT120 from tungsol
  223. em83 questions
  224. Push-pull PCL84 schematic and a question
  225. confused on power transformer ratings
  226. C3g:GM70:GM70 schematic advice
  227. Can someone explain Load Lines?
  228. Humming from WCF but not SRPP
  229. Gas regulator tubes
  230. My B&K 707 sensitivity seems wonky
  231. Lowrey LC1 B schematic wanted
  232. Complete tube amp novice got a few questions!!
  233. jacked up the bias...WOW!
  234. Looking for PP 7027a shematic
  235. So, if it's not DIY Gene, then what?
  236. What driver tube for 200Vrms?
  237. Tube socket purchase
  238. Something I found interesting a while ago!
  239. Eico HF-22 Circuit
  240. SEDHT amp - decisions decisions
  241. Confused with designing
  242. Digitally controlled analog attenuator
  243. Purchased my 1st valve amp and can only get one channel working, please help!
  244. Another silly tube yesting question
  245. potentially very stupid questions....
  246. Tube rectifier: AZ1, AZ31, AZ50 vs 5u4
  247. Tube Square-Law, what and how to set up?
  248. Need help finding schematic. Conn 720
  249. OPT for parafeed SE
  250. Anyone else tried an opamp as a driver?

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