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  1. WESTREX 60 WATT AMP
  2. Johari's audio system
  3. el95 single ended amp project needs help with preamp
  4. 3 ways active crossover
  5. 5691 tube tonal balance
  6. Dynaco Mark III chassis
  7. Stancor A-8053 Output Transformer - opinions wanted!
  8. Nice OPT's for headphone amp...
  9. Eimac 304TH anode question
  10. Is WE310A > 45 > 300B PP possible?
  11. Aikido 5687 PCB - Headphone and C3
  12. Tube RIAA(something easy)
  13. Testing power pentodes
  14. NTC Thermistor As Soft Start For Tubes
  15. NEW ARIA (MENG) MINI 6P1
  16. Basic schematic for Dodd Audio tube buffer?
  17. EL844
  18. Tube CAD?
  19. Cap Problem with philco 49-1401
  20. Music Angel
  21. Help 7189A Tubes!
  22. Bulb in cathode?
  23. Gain and volume pots - newbie question
  24. Resistor test TX7525 AMRG CMF55
  25. I think I made a mistake
  26. 12at7 and 12au7
  27. PSE KT88 using Mikael's basic schematic.....
  28. Mods Tube Amps/Pre-amp
  29. Help to find out what OPT are these
  30. LL1660 P PZ Lundahl interstage ringing problem GM70pp
  31. Adding Bal output to Akido
  32. Input impedance, the higher the better or not?
  33. Risk of DC coupled input with tube pre-amp ?
  34. UL Cascode phono
  35. DC Imbalance with the LTP
  36. More Wireless World articles archived
  37. Yaqin VK-2100 Static from one channel
  38. Direct Coupled, Self Biasing, CCS Loaded, 300B Amp
  39. Testing a 300A on a B&K
  40. Diodes to tube
  41. PL84/EL86 push pull
  42. circuit diagram
  43. Ultralinear operation
  44. 60hz hum in component system
  45. Crackling Amp
  46. Explanation wanted
  47. Dynaco FM1 stereo updating ?
  48. tube amp diy off. Is this a good deal?
  49. SE driver
  50. DN2540 + LM317 cascode CCS?
  51. Recapping old tube amp
  52. How a SRPP stage sounds like?
  53. Help troubleshooting SE Pentode amp
  54. What meter for Bias?
  55. got a custom 829b amp that i got laying around, need to know what driver to use
  56. Universal filament regulator
  57. ECC88 - 6DJ8 Cascode Plate Curves
  58. Gain of Phase Inverter
  59. CF/CCS, can it be made simpler?
  60. 2A3 Heater Hum Pot
  61. Need help - black out while the amp. was on
  62. simple question about cathodyne PI
  63. Where can I get a cover for the OPT and PS
  64. I am collecting parts for my 200w mono amps "But"
  65. This seems wrong?
  66. StoetKit Junior Schematics
  67. Valve Amplifiers 3rd edition Errata
  68. Anybody ever compared the Eico HF81 to Harman Kardon A220 "The Lute"?
  69. 6v6 datasheet
  70. Leaving filaments on?
  71. output caps -- your observations, pleeze
  72. Low gain preamp.
  73. Recommended Tube/Valve references?
  74. Tube Socket Identification
  75. Some agreement on reasonable affordable and well performing design builds?
  76. Fletcher cooke OTL article
  77. I have 4 Pl504's. Are they best used as SE or PP ?
  78. More k12g amp musings
  79. How preserve loudness circuit with new volume pot?
  80. Where to find 212E tubes???
  81. Music Angel XD-SE EL34 Amp
  82. CV345 VS EL34
  83. Reducing Filment Hum in Tubes
  84. push pull power amp
  85. 6 ohm speakers....
  86. Gold Lion KT88 Issue
  87. Plate currents in P-P
  88. Testing amplifiers with computer software...
  89. Welborn Labs - Abysmal Service
  90. Repairing broken pins on valuable tube...
  91. Explain how feedback affects DF?
  92. Low emissions
  93. Tube Blue Glow question
  94. 6l6 data sheet question
  95. Physical Tube Diagnosis?
  96. how and why power amps clip
  97. Vacuum Tube OTL power amp!!
  98. Tube replacement options.....
  99. balanced RIAA amp
  100. power amp distortion
  101. Suggestions for 5k5 40W iron?
  102. Schematic Tube Analog Output Stage???
  103. 300B 'direct drive' using a 6U8..
  104. Magnavox 88-02 power trans ratings?
  105. Preamp with humming noise!
  106. How to choose line out transformer?
  107. Tools for Cutting Tube Socket Holes?
  108. Switchable SE.
  109. GZ33 in place of 5U4 can it be done?
  110. phase splitter issue
  111. Armstrong A10 MK2 EL34 mono block
  112. "Ug" The Transformer
  113. problems with preamp on home brew
  114. LS180 Tube Socket?
  115. simple question - 5V heater power supply
  116. Lineamp
  117. FI AUDİO 421 A
  118. Pete Millett has another Red Board for sale
  119. Jolida JD9 Problem
  120. 6N11 = 6N1P ?
  121. K12-G tube amp problem
  122. Please vote for one of the schematics.
  123. Advantages of separate PS for input and output stages
  124. Another PCB tube amp design
  125. Help. Replacement OPT sqrueeechhh.
  126. New concept of a power amp
  127. Resurrecting weak tubes
  128. Best DHT heater?
  129. Help requested for EL84 SET amp
  130. What did I buy??
  131. Edcor and Custom Power Transformer Design
  132. What would you make with this power TX?
  133. Lundahl 1676
  134. DHT for 300B problem
  135. Newbie question about output transformer to speaker matching
  136. Red board add-on phono/RIAA pre-amp
  137. 2 Chassis amp
  138. Is It posible to bridge two quad II monoblocks?
  139. Power tube at work picture
  140. Tube SE power amp , which one??
  141. Noise in one channel? Pioneer SX-400
  142. Hartung / Prestla OTL amps
  143. Lafayette Model 417
  144. Extreme plate load
  145. What do you think about this idea
  146. el84pse schem, need advice
  147. Video pentodes as outputs
  148. Chinese "Audio Research" KT88s
  149. New 6C33 Socket
  150. 2a3 PP output transformer
  151. Best SET design?
  152. Anybody ever tried EBC41 as 12AX7 substitute?
  153. The 7242
  154. 12bh7a
  155. Phase Splitter Help
  156. Oscilloscope Question
  157. sizing opt
  158. 6P3C-E Datasheet help
  159. on the toroids again
  160. OPT problem or Something else 6L6 PP
  161. Look what I found!
  162. Help, Diy tube amp
  163. Idea
  164. a few DIY tube amplifier setups
  165. 6L6 PP amp motorboating
  166. Mayer-inspired 4P1L
  167. 6L6 WGB 2X34W STEREO AMPL
  168. Tube Amp DIY or Retail
  169. Supplier for GU50 tubes
  170. 2E26's
  171. Encel Stereophonic M.F.B CSM 40 amplifier
  172. Mono 300B SE Amplifier
  173. Broken tubes for 3D Modelling
  174. Loud hum in one channel
  175. 6EM7 PP question
  176. 12AU7/IRF610 Hybrid Amplifier
  177. RIAA preamplifier
  178. Classic amp, Chinese or scratch-build for Quad ESL?
  179. CLASS A TUBE AMPLIFIER FOR TWEETER
  180. How to gap output transformers?
  181. Cathode bypasses - partial bypass and combination bias
  182. Phase splitter
  183. YS Audio balanced Preamp
  184. Low voltage 12AU7 (19J6) -- re "starving"
  185. phase splitter
  186. Music Angel Meng 6P1
  187. Is it possible to dampen a partially microphonic 12ax7?
  188. Pioneer SA-810 tube amp.
  189. 6C33 D.C.M.B. - Paging Ari Polisois
  190. Whose is this logo?
  191. What is grid resistance of 807/6l6 in pentode
  192. PAS Upgrade Boards by Epperson
  193. Bang and Olufsen 609k stereo se el84 fm tuner
  194. Finished EL34 tube amp... but oscilates weird..
  195. Scope Trace
  196. Drifty tubes
  197. Choosing plate voltage
  198. Determining Zout for SRPP
  199. PX25 amplifier - thoughts?
  200. Testing Ck5703 tubes
  201. When can screen voltage be higher than plate???
  202. 31AL10's
  203. Acoustic (not Audio) Alchemy - I need a wizzard
  204. current feedback
  205. dac with tube buffer/preamp
  206. Sowter 3607
  207. Back to Loftin-White
  208. What to build? (I have a lot of parts)
  209. Grounding chassis through RCA
  210. K40Y-9: Questions And Comments
  211. buffer line stage schematic
  212. Dual triode Thanks for the pre-attenuation link
  213. Help With Alps Volume Pot Noise
  214. 6AM4 driving 45???
  215. Franks 6sn7 line stage question
  216. Recommend me a schematic for El34 or KT88 ?
  217. RH84 Power supply
  218. Pentode driving a SE triode? any experience?
  219. Big tubes thread
  220. Meng Yayi KT88 MonoBlock
  221. Old Dumont Console - Story and Questions
  222. Newbie GlassWare Aikido All in One Questios
  223. Building my 1st tube amp
  224. A good tube for my SE 5K-8 OPT's
  225. 6c33 - ready, SET, GO
  226. Noisy tube rectifier goes quiet when i put my hand NEAR it
  227. Strange ancient looking tube amp
  228. Vintage Dynaco vs. Triode Electronics
  229. LINE PRE - 6N9S - 6dB
  230. Can I balance a diff stage like this?
  231. Ways to design for low IM distortion
  232. Genalex KT88 Plate Dissipation Question
  233. difference between SE and PP transformer
  234. I put a bad ouput tube in my amp, did I hurt it?
  235. Stereo amplifyer project
  236. 6sl7 6sl7 dynaco driver board
  237. PCB for stand alone 5W SE
  238. Triode VS. UL bias
  239. How to test a DIY amp?
  240. Morgan Jones 4th ed
  241. How close is too close when designing an amp
  242. Fatman I tube Problem
  243. 807 p-p tube amp schematic
  244. Listen to 6DJ8 Triode through Power Chip IC. Easy project.
  245. James O/P Tx
  246. Ripple reduction with added voltage compensation to HV
  247. SEVETLANA "SV" 6550 C vs 6550 C
  248. Frank's 6SN7 - plate follower, noise
  249. Help running RH807 at higher voltage
  250. Preamp hum issues

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