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  1. Show My Tube Headphone Amp [Add-On Modulars Design Supporting IPOD/IPHONE]
  2. FFT for adjusting tubes
  3. Music to soothe the savage tubes.
  4. Voltage divider instead of expensive volume pot or stepped attenuator.
  5. Question about Hickok 539C
  6. Long-tail pair phase splitter
  7. LM317 calculator for filament circuit
  8. Self-Biased Cathode Follower Output Point
  9. filaments power supply
  10. Power tube buffer
  11. Latching Switch Assemblies
  12. Easy Way To Reduce 251V to 235V?
  13. EL84 Push Pull 25-30 watts
  14. Exploded view of valves
  15. Infineon BSP135 depletion mode mosfet
  16. Show us you COMPACT tube amps !
  17. HV Regulator
  18. Help with my new system
  19. Anything similar to the RNT900 regulator?
  20. The 3W Hammond 125ASE output transformer
  21. Carbon Comp vs Metal Film
  22. Different brand valves
  23. Buzz In Guitar Amp
  24. quad el84 or PP el34
  25. Inexpensive wire source
  26. to MC30 or not to MC30
  27. unbypassed cathode resistor
  28. Supro Golden Holiday Schematic Needed
  29. Does this transformer work?
  30. Max grid resistance for GM70?
  31. Stacked power supply HELP!
  32. Parallel pwr supply chokes for add'l current?
  33. Need help to verify Amperex 7119's genuineness
  34. Need help/advice on a problem with console amplifier
  35. Getting started with my VERY FIRST project
  36. PCL Vintage Amp VA1956 - transformer issue
  37. Help to Identify
  38. 300B based preamp....looking for schematic
  39. USB Oscilloscope
  40. RH84SE, use as headphone amp ?
  41. The New Yaqin/Music Angel/Meng & Others Discussion Thread
  42. Power triode bias by tube rectifier
  43. Two questions on IR volume control
  44. 25 watt output tube
  45. DC heating my 300b
  46. RNT-900 regulator
  47. KT61 Equivalent - Ping Waveborne
  48. EICO 666 meter needle moves too fast/pegs too hard...help?
  49. Eico 666 meter movement speed help
  50. Running a tube without heaters
  51. SE-BAL-SE Switching
  52. What makes is stereo?
  53. Triple Checking Calcs: metering bias with mA meter
  54. EL84 & 12AX7 Amp possibilities
  55. Weird issue with tube driver.
  56. 6E5P
  57. 6B4G / 6S4S Biasing Question
  58. Quick tube wear question
  59. Looking for a tube amp
  60. Internal placing of components
  61. Preamplifiers v power amplifiers
  62. LP2 dht driver
  63. hammond 1650
  64. reverb
  65. Load For PSU
  66. *PING* Tubechimp
  67. Revamping of a Michaelson & Austin TVA-1
  68. 6V6 Behavior W/Fixed Bias (SE Amp)
  69. Low noise, low microphony, low hum valves
  70. 6L6 / 12AX7 push-pull
  71. bowei amp for audionote ax-2 speakers?
  72. Yet another Priboi thread...
  73. Help Old Radio Philips
  74. Distortion discussion from mosqueto Hybrid thread
  75. Sovtek 6N1P Microphonics
  76. ECC86 / 6GM8 Radio Receiver Help
  77. Los Angeles
  78. Op point for 6au6/6gu5 in P-G feedback 6550
  79. Tube Pre-Amp Schematic Needed
  80. find a YAQIN 5881a amplifier
  81. 11N90C in the SBCCS circuit
  82. Help replacing a PSU choke - How to choose choke
  83. does this look like a joke to you?
  84. Electronic Choke for Valve Amplifiers
  85. Sockets for a WE429A
  86. To bypass or not to bypass...
  87. DIY Curve Tracer
  88. 300B filament winding center tapped?
  89. help me decide,headphone amp - parafeed or normal tx ?
  90. 7060 vs 6AN8A
  91. Psu
  92. Blackheart amp moding question
  93. EDCOR Output transformer for 300B
  94. 80 or RGN1064 Scenario
  95. TUBENEWB - Quad KT88 Monoblocks
  96. CCS in Differential phase splitter?
  97. Need schematic for Smart 2x150vt
  98. Antek OPT
  99. 6DQ6 for audio power amp?
  100. Anyone identify this Mullard?
  101. My Mullard 5-20: some photos and a question
  102. Tube can work in low volt~~fix your knowledge
  103. A problem with a tube receiver
  104. Auto Transformer - safety advice
  105. Where I could find tube in San Jose
  106. 6Н30П spice model for MicroCap ?
  107. Transformer input and resonance
  108. GE6111 Preamplifier
  109. Where to buy audio tubes in Europe
  110. Play iPod into 1955 Record Player's Tube Amplifier
  111. To Schade it , or not..
  112. questions on input stage
  113. Planar/Lighthouse triodes for Audio?
  114. The Best coupling cap..THEL??
  115. 211 SET 40W output design and mfg.
  116. Volume Control with Loudness and no Taps
  117. Use for 4k PP (non UL) OPT's?
  118. Heathkit Oscilloscope O-12
  119. Filament Autobias
  120. Shelby NC Ham Fest
  121. 2A3 Spud
  122. Resistor as a load
  123. How to balance pushp pull DHT finals
  124. 240v to 220v
  125. Hammond 272 FX plate voltage
  126. Drawing Load Line for Parallel Output Tube
  127. question about swapping el34 for kt77 in my tube amp
  128. 6 volt recifier tubes
  129. PSU Capacitor Selection
  130. Output transformer sizing...again...
  131. Power supply cabling
  132. Voltage doubler using PSUII?
  133. Rectifier Tubes in SE Amps
  134. 6v6 SEP
  135. 1967 Pioneer SX-34, 11W, WORTH FIXING???
  136. Jumper Wire Gauge and Material for Phono Preamp?
  137. Tube libraries for AutoTRAX wanted.
  138. DIY Layout Creator for Chassis Designs
  139. ecc99 - 6C19n PP, (6S19P)
  140. Dr Z Carmen Ghia build from a Hammond Reverb amp!!
  141. Strange HF distortion
  142. have a pair of 5k:8 OPTs lying around.. suggest me something to build?
  143. Marshall 1959 (Super Tremolo) repair help
  144. Early history of High Fidelity amplifiers
  145. Which pentode for input?
  146. 6n6p or 6P14P-ev for driver
  147. Old tranny - confused with windings
  148. Dynaco A-430 Vintage Output Transformers
  149. Output tube for 800 Ohm speaker?
  150. Today was the anual Tree Street Yard Sale event
  151. Florida ? what did I get ?
  152. 26HU5's vs 26DQ5's
  153. VoltCraft AT-400?
  154. Sonic differences: 45, 2A3, 300B, 845, 211
  155. Need help wiring a pot for cathode adjustment
  156. Sound of the 6SN7?
  157. A mystery device
  158. Plate curves... Ic2 & Ib?
  159. How to choke load for big voltage swings?
  160. 6550 SE design, please comment.
  161. "Impedance" of the output transformer
  162. Triode-wired small signal pentode question
  163. Calculating output impedance
  164. 6JM6 Infomation for Pete Millett's DCPP Amp
  165. Tube labeld ETBB
  166. Heaters wiring help!
  167. What do you guys think of this IR volume control?
  168. Can you send me the Aikido 5687 user manual
  169. Cathode Follower output cap
  170. EL84 rebuild suggestions
  171. voltage divider in WE91 driver
  172. Power Tx Myth?
  173. voltage multiplier based on SS trafo - LONG
  174. What tube for QUIET phono pre??
  175. A&R 8ohm 4008 output transformer
  176. How does DRD Ultrapath Work?
  177. Russian 6H2p-E??
  178. Started work on my stereo 7027a PSE amp
  179. Mono Tube Comp for analog kick drum
  180. Line stage preamplifier
  181. Trying to select the Aikido components
  182. X-PRE musical fidelity preamp. need help modifying
  183. 6C33C & Borbely Question
  184. 12BH7A in common cathode
  185. Sneak Preview: 9 Band Active All Tube EQ
  186. Bought a set of Greenlee conduit punches for my latest project - WOW!
  187. "Universal" octal amplifier?
  188. MU follower - distortion
  189. lighting transformers 12V
  190. Chinese 6N3 preamp questions
  191. Why are Chinese preamp knockoffs so popular?
  192. 4K7 OPT suitable for 6550/KT88?
  193. Transformer question - 110 v and 25 v from 1 secondary?
  194. About loadline again, how to choose load and current
  195. Parallel Output Transformers
  196. 6SN7 / 6V6 power amp : very odd behavour
  197. HV mA Spec on Large RCA Power Xfmr?
  198. Is the Aikido too 'bright'?
  199. Has anyone put the Glassware phono & line amps in same box?
  200. High impedance balanced output: how long the cable?
  201. Data Sheets
  202. Can I use a LM317 bias on lower cathode of SRPP?
  203. AU-34 Output transformer replacement question
  204. The new KT120 from tungsol
  205. em83 questions
  206. Push-pull PCL84 schematic and a question
  207. confused on power transformer ratings
  208. C3g:GM70:GM70 schematic advice
  209. Can someone explain Load Lines?
  210. Humming from WCF but not SRPP
  211. Gas regulator tubes
  212. My B&K 707 sensitivity seems wonky
  213. Lowrey LC1 B schematic wanted
  214. Complete tube amp novice got a few questions!!
  215. jacked up the bias...WOW!
  216. Looking for PP 7027a shematic
  217. So, if it's not DIY Gene, then what?
  218. What driver tube for 200Vrms?
  219. Tube socket purchase
  220. Something I found interesting a while ago!
  221. Eico HF-22 Circuit
  222. SEDHT amp - decisions decisions
  223. Confused with designing
  224. Digitally controlled analog attenuator
  225. Purchased my 1st valve amp and can only get one channel working, please help!
  226. Another silly tube yesting question
  227. potentially very stupid questions....
  228. Tube rectifier: AZ1, AZ31, AZ50 vs 5u4
  229. Tube Square-Law, what and how to set up?
  230. Need help finding schematic. Conn 720
  231. OPT for parafeed SE
  232. Anyone else tried an opamp as a driver?
  233. e180f/6688 pentode operting points
  234. power supply reassignment problem
  235. Mains power transformer on S5 K-12 kit hums?
  236. Oriole OPT
  237. 26DQ5's vs 26HU5's vs 6KN6's and transformers
  238. SRPP power using power tranny as OPT?
  239. Need guidance with heathkit SA-2 refurbish/mods
  240. B+ discharge times!
  241. 26HU5's....and a confession
  242. Bell Sound Systems Pacemaker Model 2220
  243. Any thoughts on this transformer on eBay?
  244. Need some help figuring out a Wurlitzer 6240.
  245. Bypassing cathode resistor on pp power tube
  246. Is it safe to use a 8BQ5 in place of a 6BQ5 in a guitar amp?
  247. TRIODE Voltage amp + Power OP output follower
  248. Cats and tube-a-holics
  249. Replace Tube Rectifier With Weber CC?
  250. 717a 2 stage SE amplifier

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