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  1. My RH84 Build - first amp after a 25 year break -:)
  2. Jolida 502a Snubber Mod
  3. Again
  4. KT120, PSE
  5. 6v6 bias with cathodyne
  6. How did the "magic eye" work on old valve radios ?
  7. High voltage switching
  8. EF184 as ccs / design questions / spice model
  9. ECC807
  10. Compactron 6C10 & 6Q11/6K11 tube data
  11. Reverse Engineering leads from Tube amp
  12. Did you all see this??
  13. WESTREX 60 WATT AMP
  14. Johari's audio system
  15. el95 single ended amp project needs help with preamp
  16. 3 ways active crossover
  17. 5691 tube tonal balance
  18. Dynaco Mark III chassis
  19. Stancor A-8053 Output Transformer - opinions wanted!
  20. Nice OPT's for headphone amp...
  21. Eimac 304TH anode question
  22. Is WE310A > 45 > 300B PP possible?
  23. Aikido 5687 PCB - Headphone and C3
  24. Tube RIAA(something easy)
  25. Testing power pentodes
  26. NTC Thermistor As Soft Start For Tubes
  27. NEW ARIA (MENG) MINI 6P1
  28. Basic schematic for Dodd Audio tube buffer?
  29. EL844
  30. Tube CAD?
  31. Cap Problem with philco 49-1401
  32. Music Angel
  33. Help 7189A Tubes!
  34. Bulb in cathode?
  35. Gain and volume pots - newbie question
  36. Resistor test TX7525 AMRG CMF55
  37. I think I made a mistake
  38. 12at7 and 12au7
  39. PSE KT88 using Mikael's basic schematic.....
  40. Mods Tube Amps/Pre-amp
  41. Help to find out what OPT are these
  42. LL1660 P PZ Lundahl interstage ringing problem GM70pp
  43. Adding Bal output to Akido
  44. Input impedance, the higher the better or not?
  45. Risk of DC coupled input with tube pre-amp ?
  46. UL Cascode phono
  47. DC Imbalance with the LTP
  48. More Wireless World articles archived
  49. Yaqin VK-2100 Static from one channel
  50. Direct Coupled, Self Biasing, CCS Loaded, 300B Amp
  51. Testing a 300A on a B&K
  52. Diodes to tube
  53. PL84/EL86 push pull
  54. circuit diagram
  55. Ultralinear operation
  56. 60hz hum in component system
  57. Crackling Amp
  58. Explanation wanted
  59. Dynaco FM1 stereo updating ?
  60. tube amp diy off. Is this a good deal?
  61. SE driver
  62. DN2540 + LM317 cascode CCS?
  63. Recapping old tube amp
  64. How a SRPP stage sounds like?
  65. Help troubleshooting SE Pentode amp
  66. What meter for Bias?
  67. got a custom 829b amp that i got laying around, need to know what driver to use
  68. Universal filament regulator
  69. ECC88 - 6DJ8 Cascode Plate Curves
  70. Gain of Phase Inverter
  71. CF/CCS, can it be made simpler?
  72. 2A3 Heater Hum Pot
  73. Need help - black out while the amp. was on
  74. simple question about cathodyne PI
  75. Where can I get a cover for the OPT and PS
  76. I am collecting parts for my 200w mono amps "But"
  77. This seems wrong?
  78. StoetKit Junior Schematics
  79. Valve Amplifiers 3rd edition Errata
  80. Anybody ever compared the Eico HF81 to Harman Kardon A220 "The Lute"?
  81. 6v6 datasheet
  82. Leaving filaments on?
  83. output caps -- your observations, pleeze
  84. Low gain preamp.
  85. Recommended Tube/Valve references?
  86. Tube Socket Identification
  87. Some agreement on reasonable affordable and well performing design builds?
  88. Fletcher cooke OTL article
  89. I have 4 Pl504's. Are they best used as SE or PP ?
  90. More k12g amp musings
  91. How preserve loudness circuit with new volume pot?
  92. Where to find 212E tubes???
  93. Music Angel XD-SE EL34 Amp
  94. CV345 VS EL34
  95. Reducing Filment Hum in Tubes
  96. push pull power amp
  97. 6 ohm speakers....
  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. 6l6 data sheet question
  107. Physical Tube Diagnosis?
  108. how and why power amps clip
  109. Vacuum Tube OTL power amp!!
  110. Tube replacement options.....
  111. balanced RIAA amp
  112. power amp distortion
  113. Suggestions for 5k5 40W iron?
  114. Schematic Tube Analog Output Stage???
  115. 300B 'direct drive' using a 6U8..
  116. Magnavox 88-02 power trans ratings?
  117. Preamp with humming noise!
  118. How to choose line out transformer?
  119. Tools for Cutting Tube Socket Holes?
  120. Switchable SE.
  121. GZ33 in place of 5U4 can it be done?
  122. phase splitter issue
  123. Armstrong A10 MK2 EL34 mono block
  124. "Ug" The Transformer
  125. problems with preamp on home brew
  126. LS180 Tube Socket?
  127. simple question - 5V heater power supply
  128. Lineamp
  129. FI AUDİO 421 A
  130. Pete Millett has another Red Board for sale
  131. Jolida JD9 Problem
  132. 6N11 = 6N1P ?
  133. K12-G tube amp problem
  134. Please vote for one of the schematics.
  135. Advantages of separate PS for input and output stages
  136. Another PCB tube amp design
  137. Help. Replacement OPT sqrueeechhh.
  138. New concept of a power amp
  139. Resurrecting weak tubes
  140. Best DHT heater?
  141. Help requested for EL84 SET amp
  142. What did I buy??
  143. Edcor and Custom Power Transformer Design
  144. What would you make with this power TX?
  145. Lundahl 1676
  146. DHT for 300B problem
  147. Newbie question about output transformer to speaker matching
  148. Red board add-on phono/RIAA pre-amp
  149. 2 Chassis amp
  150. Is It posible to bridge two quad II monoblocks?
  151. Power tube at work picture
  152. Tube SE power amp , which one??
  153. Noise in one channel? Pioneer SX-400
  154. Hartung / Prestla OTL amps
  155. Lafayette Model 417
  156. Extreme plate load
  157. What do you think about this idea
  158. el84pse schem, need advice
  159. Video pentodes as outputs
  160. Chinese "Audio Research" KT88s
  161. New 6C33 Socket
  162. 2a3 PP output transformer
  163. Best SET design?
  164. Anybody ever tried EBC41 as 12AX7 substitute?
  165. The 7242
  166. 12bh7a
  167. Phase Splitter Help
  168. Oscilloscope Question
  169. sizing opt
  170. 6P3C-E Datasheet help
  171. on the toroids again
  172. OPT problem or Something else 6L6 PP
  173. Look what I found!
  174. Help, Diy tube amp
  175. Idea
  176. a few DIY tube amplifier setups
  177. 6L6 PP amp motorboating
  178. Mayer-inspired 4P1L
  179. 6L6 WGB 2X34W STEREO AMPL
  180. Tube Amp DIY or Retail
  181. Supplier for GU50 tubes
  182. 2E26's
  183. Encel Stereophonic M.F.B CSM 40 amplifier
  184. Mono 300B SE Amplifier
  185. Broken tubes for 3D Modelling
  186. Loud hum in one channel
  187. 6EM7 PP question
  188. 12AU7/IRF610 Hybrid Amplifier
  189. RIAA preamplifier
  190. Classic amp, Chinese or scratch-build for Quad ESL?
  191. CLASS A TUBE AMPLIFIER FOR TWEETER
  192. How to gap output transformers?
  193. Cathode bypasses - partial bypass and combination bias
  194. Phase splitter
  195. YS Audio balanced Preamp
  196. Low voltage 12AU7 (19J6) -- re "starving"
  197. phase splitter
  198. Music Angel Meng 6P1
  199. Is it possible to dampen a partially microphonic 12ax7?
  200. Pioneer SA-810 tube amp.
  201. 6C33 D.C.M.B. - Paging Ari Polisois
  202. Whose is this logo?
  203. What is grid resistance of 807/6l6 in pentode
  204. PAS Upgrade Boards by Epperson
  205. Bang and Olufsen 609k stereo se el84 fm tuner
  206. Finished EL34 tube amp... but oscilates weird..
  207. Scope Trace
  208. Drifty tubes
  209. Choosing plate voltage
  210. Determining Zout for SRPP
  211. PX25 amplifier - thoughts?
  212. Testing Ck5703 tubes
  213. When can screen voltage be higher than plate???
  214. 31AL10's
  215. Acoustic (not Audio) Alchemy - I need a wizzard
  216. current feedback
  217. dac with tube buffer/preamp
  218. Sowter 3607
  219. Back to Loftin-White
  220. What to build? (I have a lot of parts)
  221. Grounding chassis through RCA
  222. K40Y-9: Questions And Comments
  223. buffer line stage schematic
  224. Dual triode Thanks for the pre-attenuation link
  225. Help With Alps Volume Pot Noise
  226. 6AM4 driving 45???
  227. Franks 6sn7 line stage question
  228. Recommend me a schematic for El34 or KT88 ?
  229. RH84 Power supply
  230. Pentode driving a SE triode? any experience?
  231. Big tubes thread
  232. Meng Yayi KT88 MonoBlock
  233. Old Dumont Console - Story and Questions
  234. Newbie GlassWare Aikido All in One Questios
  235. Building my 1st tube amp
  236. A good tube for my SE 5K-8 OPT's
  237. 6c33 - ready, SET, GO
  238. Noisy tube rectifier goes quiet when i put my hand NEAR it
  239. Strange ancient looking tube amp
  240. Vintage Dynaco vs. Triode Electronics
  241. LINE PRE - 6N9S - 6dB
  242. Can I balance a diff stage like this?
  243. Ways to design for low IM distortion
  244. Genalex KT88 Plate Dissipation Question
  245. difference between SE and PP transformer
  246. I put a bad ouput tube in my amp, did I hurt it?
  247. Stereo amplifyer project
  248. 6sl7 6sl7 dynaco driver board
  249. PCB for stand alone 5W SE
  250. Triode VS. UL bias

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