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  1. Did you all see this??
  2. WESTREX 60 WATT AMP
  3. Johari's audio system
  4. el95 single ended amp project needs help with preamp
  5. SS Rectifers and Zero-Crossing Distortion, possible fix or idotic idea?
  6. 3 ways active crossover
  7. 5691 tube tonal balance
  8. Dynaco Mark III chassis
  9. variac - breadboard with choke input
  10. Stancor A-8053 Output Transformer - opinions wanted!
  11. Nice OPT's for headphone amp...
  12. Eimac 304TH anode question
  13. Is WE310A > 45 > 300B PP possible?
  14. Aikido 5687 PCB - Headphone and C3
  15. Twist-lok caps?
  16. Tube RIAA(something easy)
  17. Testing power pentodes
  18. NTC THERMISTOR as SOFT START for TUBES
  19. NEW ARIA (MENG) MINI 6P1
  20. Basic schematic for Dodd Audio tube buffer?
  21. EL844
  22. Tube CAD?
  23. Cap Problem with philco 49-1401
  24. Music Angel
  25. Help 7189A Tubes!
  26. Bulb in cathode?
  27. Gain and volume pots - newbie question
  28. Resistor test TX7525 AMRG CMF55
  29. I think I made a mistake
  30. 12at7 and 12au7
  31. PSE KT88 using Mikael's basic schematic.....
  32. PSU sanity check - negative rail?
  33. Mods Tube Amps/Pre-amp
  34. Help to find out what OPT are these
  35. LL1660 P PZ Lundahl interstage ringing problem GM70pp
  36. Possible PS chokes
  37. Adding Bal output to Akido
  38. Input impedance, the higher the better or not?
  39. Risk of DC coupled input with tube pre-amp ?
  40. UL Cascode phono
  41. DC Imbalance with the LTP
  42. More Wireless World articles archived
  43. Yaqin VK-2100 Static from one channel
  44. Direct Coupled, Self Biasing, CCS Loaded, 300B Amp
  45. Testing a 300A on a B&K
  46. Diodes to tube
  47. PL84/EL86 push pull
  48. circuit diagram
  49. Ultralinear operation
  50. 60hz hum in component system
  51. Crackling Amp
  52. Regulated Supply for Direct Coupled Amp
  53. Explanation wanted
  54. Dynaco FM1 stereo updating ?
  55. tube amp diy off. Is this a good deal?
  56. SE driver
  57. DN2540 + LM317 cascode CCS?
  58. Recapping old tube amp
  59. How a SRPP stage sounds like?
  60. Help troubleshooting SE Pentode amp
  61. What meter for Bias?
  62. Mains tranformer noise
  63. Tube tester block diagram
  64. got a custom 829b amp that i got laying around, need to know what driver to use
  65. Universal filament regulator
  66. ECC88 - 6DJ8 Cascode Plate Curves
  67. Gain of Phase Inverter
  68. CF/CCS, can it be made simpler?
  69. 2A3 Heater Hum Pot
  70. Need help - black out while the amp. was on
  71. simple question about cathodyne PI
  72. Where can I get a cover for the OPT and PS
  73. Power supply for heater
  74. how to use oscilloscope
  75. I am collecting parts for my 200w mono amps "But"
  76. This seems wrong?
  77. StoetKit Junior Schematics
  78. Valve Amplifiers 3rd edition Errata
  79. Anybody ever compared the Eico HF81 to Harman Kardon A220 "The Lute"?
  80. 6v6 datasheet
  81. Leaving filaments on?
  82. output caps -- your observations, pleeze
  83. Low gain preamp.
  84. Recommended Tube/Valve references?
  85. Tube Socket Identification
  86. Some agreement on reasonable affordable and well performing design builds?
  87. Fletcher cooke OTL article
  88. I have 4 Pl504's. Are they best used as SE or PP ?
  89. More k12g amp musings
  90. How preserve loudness circuit with new volume pot?
  91. Where to find 212E tubes???
  92. Music Angel XD-SE EL34 Amp
  93. CV345 VS EL34
  94. Reducing Filment Hum in Tubes
  95. push pull power amp
  96. 6 ohm speakers....
  97. Need a 12.6 VDC power supply schematic
  98. Gold Lion KT88 Issue
  99. Plate currents in P-P
  100. Testing amplifiers with computer software...
  101. Welborn Labs - Abysmal Service
  102. Repairing broken pins on valuable tube...
  103. Explain how feedback affects DF?
  104. Low emissions
  105. Tube Blue Glow question
  106. Common-mode choke before or after?
  107. 6l6 data sheet question
  108. Physical Tube Diagnosis?
  109. how and why power amps clip
  110. Vacuum Tube OTL power amp!!
  111. Tube replacement options.....
  112. balanced RIAA amp
  113. power amp distortion
  114. Suggestions for 5k5 40W iron?
  115. Schematic Tube Analog Output Stage???
  116. 300B 'direct drive' using a 6U8..
  117. Magnavox 88-02 power trans ratings?
  118. Preamp with humming noise!
  119. How to choose line out transformer?
  120. Tools for Cutting Tube Socket Holes?
  121. Switchable SE.
  122. GZ33 in place of 5U4 can it be done?
  123. phase splitter issue
  124. Armstrong A10 MK2 EL34 mono block
  125. "Ug" The Transformer
  126. i think its time i start playing with caps
  127. problems with preamp on home brew
  128. LS180 Tube Socket?
  129. simple question - 5V heater power supply
  130. Lineamp
  131. FI AUDİO 421 A
  132. Pete Millett has another Red Board for sale
  133. Jolida JD9 Problem
  134. 6N11 = 6N1P ?
  135. K12-G tube amp problem
  136. Please vote for one of the schematics.
  137. Advantages of separate PS for input and output stages
  138. Another PCB tube amp design
  139. Help. Replacement OPT sqrueeechhh.
  140. New concept of a power amp
  141. Lundahl and rectifier mismatch?
  142. Resurrecting weak tubes
  143. Best DHT heater?
  144. Help requested for EL84 SET amp
  145. What did I buy??
  146. Edcor and Custom Power Transformer Design
  147. What would you make with this power TX?
  148. Lundahl 1676
  149. DHT for 300B problem
  150. Newbie question about output transformer to speaker matching
  151. Red board add-on phono/RIAA pre-amp
  152. 2 Chassis amp
  153. Is It posible to bridge two quad II monoblocks?
  154. Power tube at work picture
  155. Tube SE power amp , which one??
  156. Hickok 539A issue
  157. Noise in one channel? Pioneer SX-400
  158. Hartung / Prestla OTL amps
  159. Lafayette Model 417
  160. Extreme plate load
  161. What do you think about this idea
  162. el84pse schem, need advice
  163. Video pentodes as outputs
  164. Chinese "Audio Research" KT88s
  165. New 6C33 Socket
  166. 2a3 PP output transformer
  167. PSU problem - Murphy is an ***hole!
  168. Best SET design?
  169. Anybody ever tried EBC41 as 12AX7 substitute?
  170. The 7242
  171. 12bh7a
  172. Phase Splitter Help
  173. Oscilloscope Question
  174. sizing opt
  175. 6P3C-E Datasheet help
  176. on the toroids again
  177. OPT problem or Something else 6L6 PP
  178. Look what I found!
  179. Help, Diy tube amp
  180. Idea
  181. a few DIY tube amplifier setups
  182. 6L6 PP amp motorboating
  183. Mayer-inspired 4P1L
  184. 6L6 WGB 2X34W STEREO AMPL
  185. Isolation transformation wiring project help
  186. Tube Amp DIY or Retail
  187. Supplier for GU50 tubes
  188. 2E26's
  189. Encel Stereophonic M.F.B CSM 40 amplifier
  190. Mono 300B SE Amplifier
  191. Broken tubes for 3D Modelling
  192. Loud hum in one channel
  193. 6EM7 PP question
  194. 12AU7/IRF610 Hybrid Amplifier
  195. RIAA preamplifier
  196. Classic amp, Chinese or scratch-build for Quad ESL?
  197. CLASS A TUBE AMPLIFIER FOR TWEETER
  198. How to gap output transformers?
  199. Cathode bypasses - partial bypass and combination bias
  200. Phase splitter
  201. YS Audio balanced Preamp
  202. Low voltage 12AU7 (19J6) -- re "starving"
  203. phase splitter
  204. Music Angel Meng 6P1
  205. Is it possible to dampen a partially microphonic 12ax7?
  206. Pioneer SA-810 tube amp.
  207. 6C33 D.C.M.B. - Paging Ari Polisois
  208. Whose is this logo?
  209. What is grid resistance of 807/6l6 in pentode
  210. PAS Upgrade Boards by Epperson
  211. Bang and Olufsen 609k stereo se el84 fm tuner
  212. Finished EL34 tube amp... but oscilates weird..
  213. Scope Trace
  214. Drifty tubes
  215. Choosing plate voltage
  216. Determining Zout for SRPP
  217. PX25 amplifier - thoughts?
  218. Testing Ck5703 tubes
  219. When can screen voltage be higher than plate???
  220. 31AL10's
  221. Lafayette TE-50 Tube Tester
  222. Acoustic (not Audio) Alchemy - I need a wizzard
  223. current feedback
  224. dac with tube buffer/preamp
  225. Sowter 3607
  226. Back to Loftin-White
  227. What to build? (I have a lot of parts)
  228. Grounding chassis through RCA
  229. K40Y-9: Questions And Comments
  230. buffer line stage schematic
  231. Dual triode Thanks for the pre-attenuation link
  232. Help With Alps Volume Pot Noise
  233. 6AM4 driving 45???
  234. Franks 6sn7 line stage question
  235. Edcor power tx XPWR035 issue
  236. Recommend me a schematic for El34 or KT88 ?
  237. RH84 Power supply
  238. Pentode driving a SE triode? any experience?
  239. Big tubes thread
  240. Meng Yayi KT88 MonoBlock
  241. Old Dumont Console - Story and Questions
  242. Newbie GlassWare Aikido All in One Questios
  243. Building my 1st tube amp
  244. A good tube for my SE 5K-8 OPT's
  245. 6c33 - ready, SET, GO
  246. Noisy tube rectifier goes quiet when i put my hand NEAR it
  247. Strange ancient looking tube amp
  248. Vintage Dynaco vs. Triode Electronics
  249. LINE PRE - 6N9S - 6dB
  250. Can I balance a diff stage like this?

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