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  1. Ming-Da MC-300B845 schematic needed
  2. My RH84 Build - first amp after a 25 year break -:)
  3. Jolida 502a Snubber Mod
  4. Again
  5. KT120, PSE
  6. 6v6 bias with cathodyne
  7. How did the "magic eye" work on old valve radios ?
  8. High voltage switching
  9. High voltage switching
  10. EF184 as ccs / design questions / spice model
  11. ECC807
  12. Chassis thickness
  13. Compactron 6C10 & 6Q11/6K11 tube data
  14. Output voltage guitar preamp
  15. Reverse Engineering leads from Tube amp
  16. Did you all see this??
  17. WESTREX 60 WATT AMP
  18. Johari's audio system
  19. el95 single ended amp project needs help with preamp
  20. SS Rectifers and Zero-Crossing Distortion, possible fix or idotic idea?
  21. 3 ways active crossover
  22. 5691 tube tonal balance
  23. Dynaco Mark III chassis
  24. variac - breadboard with choke input
  25. Stancor A-8053 Output Transformer - opinions wanted!
  26. Nice OPT's for headphone amp...
  27. Eimac 304TH anode question
  28. Is WE310A > 45 > 300B PP possible?
  29. Aikido 5687 PCB - Headphone and C3
  30. Twist-lok caps?
  31. Tube RIAA(something easy)
  32. Testing power pentodes
  33. NTC THERMISTOR as SOFT START for TUBES
  34. NEW ARIA (MENG) MINI 6P1
  35. Basic schematic for Dodd Audio tube buffer?
  36. EL844
  37. 3 channel all tube preamp pedal w/fx loops for all clone build
  38. Tube CAD?
  39. Cap Problem with philco 49-1401
  40. Music Angel
  41. Help 7189A Tubes!
  42. Bulb in cathode?
  43. Gain and volume pots - newbie question
  44. Resistor test TX7525 AMRG CMF55
  45. I think I made a mistake
  46. 12at7 and 12au7
  47. PSE KT88 using Mikael's basic schematic.....
  48. PSU sanity check - negative rail?
  49. Mods Tube Amps/Pre-amp
  50. Help to find out what OPT are these
  51. LL1660 P PZ Lundahl interstage ringing problem GM70pp
  52. Possible PS chokes
  53. Adding Bal output to Akido
  54. Input impedance, the higher the better or not?
  55. Risk of DC coupled input with tube pre-amp ?
  56. UL Cascode phono
  57. DC Imbalance with the LTP
  58. More Wireless World articles archived
  59. Yaqin VK-2100 Static from one channel
  60. Direct Coupled, Self Biasing, CCS Loaded, 300B Amp
  61. Testing a 300A on a B&K
  62. Diodes to tube
  63. PL84/EL86 push pull
  64. circuit diagram
  65. Ultralinear operation
  66. 60hz hum in component system
  67. Crackling Amp
  68. Regulated Supply for Direct Coupled Amp
  69. Explanation wanted
  70. Dynaco FM1 stereo updating ?
  71. tube amp diy off. Is this a good deal?
  72. SE driver
  73. DN2540 + LM317 cascode CCS?
  74. Recapping old tube amp
  75. How a SRPP stage sounds like?
  76. Help troubleshooting SE Pentode amp
  77. What meter for Bias?
  78. Mains tranformer noise
  79. Tube tester block diagram
  80. got a custom 829b amp that i got laying around, need to know what driver to use
  81. Universal filament regulator
  82. ECC88 - 6DJ8 Cascode Plate Curves
  83. Gain of Phase Inverter
  84. CF/CCS, can it be made simpler?
  85. 2A3 Heater Hum Pot
  86. Need help - black out while the amp. was on
  87. simple question about cathodyne PI
  88. Where can I get a cover for the OPT and PS
  89. Power supply for heater
  90. how to use oscilloscope
  91. I am collecting parts for my 200w mono amps "But"
  92. This seems wrong?
  93. StoetKit Junior Schematics
  94. Valve Amplifiers 3rd edition Errata
  95. Anybody ever compared the Eico HF81 to Harman Kardon A220 "The Lute"?
  96. 6v6 datasheet
  97. Leaving filaments on?
  98. output caps -- your observations, pleeze
  99. Low gain preamp.
  100. Recommended Tube/Valve references?
  101. Stand Alone guitar power amp
  102. Tube Socket Identification
  103. Some agreement on reasonable affordable and well performing design builds?
  104. Fletcher cooke OTL article
  105. I have 4 Pl504's. Are they best used as SE or PP ?
  106. More k12g amp musings
  107. How preserve loudness circuit with new volume pot?
  108. Where to find 212E tubes???
  109. Music Angel XD-SE EL34 Amp
  110. CV345 VS EL34
  111. Reducing Filment Hum in Tubes
  112. push pull power amp
  113. 6 ohm speakers....
  114. Need a 12.6 VDC power supply schematic
  115. Gold Lion KT88 Issue
  116. Plate currents in P-P
  117. Bass preamp + Edcor balanced out = HUM!
  118. Testing amplifiers with computer software...
  119. Welborn Labs - Abysmal Service
  120. Repairing broken pins on valuable tube...
  121. Explain how feedback affects DF?
  122. Low emissions
  123. Tube Blue Glow question
  124. Common-mode choke before or after?
  125. 6l6 data sheet question
  126. Mic preamp
  127. Physical Tube Diagnosis?
  128. how and why power amps clip
  129. 80's Guitar Amp...replacing o/p tubes...which 6L6 should i try?
  130. Vacuum Tube OTL power amp!!
  131. Tube replacement options.....
  132. balanced RIAA amp
  133. power amp distortion
  134. Suggestions for 5k5 40W iron?
  135. Peavey Classic 30 Reverb headscratcher...
  136. Schematic Tube Analog Output Stage???
  137. 300B 'direct drive' using a 6U8..
  138. Magnavox 88-02 power trans ratings?
  139. Preamp with humming noise!
  140. How to choose line out transformer?
  141. Tools for Cutting Tube Socket Holes?
  142. Switchable SE.
  143. GZ33 in place of 5U4 can it be done?
  144. phase splitter issue
  145. Armstrong A10 MK2 EL34 mono block
  146. "Ug" The Transformer
  147. i think its time i start playing with caps
  148. problems with preamp on home brew
  149. LS180 Tube Socket?
  150. simple question - 5V heater power supply
  151. Lineamp
  152. FI AUDİO 421 A
  153. Pete Millett has another Red Board for sale
  154. Jolida JD9 Problem
  155. 6N11 = 6N1P ?
  156. K12-G tube amp problem
  157. Please vote for one of the schematics.
  158. Advantages of separate PS for input and output stages
  159. Another PCB tube amp design
  160. Help. Replacement OPT sqrueeechhh.
  161. New concept of a power amp
  162. Lundahl and rectifier mismatch?
  163. Resurrecting weak tubes
  164. Best DHT heater?
  165. Help requested for EL84 SET amp
  166. What did I buy??
  167. Edcor and Custom Power Transformer Design
  168. What would you make with this power TX?
  169. Lundahl 1676
  170. DHT for 300B problem
  171. Newbie question about output transformer to speaker matching
  172. Red board add-on phono/RIAA pre-amp
  173. 2 Chassis amp
  174. Is It posible to bridge two quad II monoblocks?
  175. Power tube at work picture
  176. Tube SE power amp , which one??
  177. Hickok 539A issue
  178. Noise in one channel? Pioneer SX-400
  179. Hartung / Prestla OTL amps
  180. Lafayette Model 417
  181. Extreme plate load
  182. What do you think about this idea
  183. el84pse schem, need advice
  184. Video pentodes as outputs
  185. Custom Vibrolux Reverb noise issue
  186. Chinese "Audio Research" KT88s
  187. Fender bandmaster rectifire problem.
  188. New 6C33 Socket
  189. 2a3 PP output transformer
  190. PSU problem - Murphy is an ***hole!
  191. Best SET design?
  192. Anybody ever tried EBC41 as 12AX7 substitute?
  193. The 7242
  194. 12bh7a
  195. Phase Splitter Help
  196. Oscilloscope Question
  197. sizing opt
  198. 6P3C-E Datasheet help
  199. on the toroids again
  200. OPT problem or Something else 6L6 PP
  201. Look what I found!
  202. Help, Diy tube amp
  203. Idea
  204. a few DIY tube amplifier setups
  205. 6L6 PP amp motorboating
  206. Mayer-inspired 4P1L
  207. 6L6 WGB 2X34W STEREO AMPL
  208. Isolation transformation wiring project help
  209. Tube Amp DIY or Retail
  210. Supplier for GU50 tubes
  211. 2E26's
  212. Encel Stereophonic M.F.B CSM 40 amplifier
  213. Mono 300B SE Amplifier
  214. Broken tubes for 3D Modelling
  215. Loud hum in one channel
  216. 6EM7 PP question
  217. 12AU7/IRF610 Hybrid Amplifier
  218. 12AU7/IRF610 Hybrid Amplifier
  219. RIAA preamplifier
  220. Classic amp, Chinese or scratch-build for Quad ESL?
  221. CLASS A TUBE AMPLIFIER FOR TWEETER
  222. How to gap output transformers?
  223. Cathode bypasses - partial bypass and combination bias
  224. Phase splitter
  225. YS Audio balanced Preamp
  226. Low voltage 12AU7 (19J6) -- re "starving"
  227. phase splitter
  228. JTM30 output transformer
  229. Music Angel Meng 6P1
  230. Is it possible to dampen a partially microphonic 12ax7?
  231. Pioneer SA-810 tube amp.
  232. 6C33 D.C.M.B. - Paging Ari Polisois
  233. Whose is this logo?
  234. What is grid resistance of 807/6l6 in pentode
  235. PAS Upgrade Boards by Epperson
  236. Bang and Olufsen 609k stereo se el84 fm tuner
  237. Finished EL34 tube amp... but oscilates weird..
  238. Scope Trace
  239. Drifty tubes
  240. Choosing plate voltage
  241. Determining Zout for SRPP
  242. PX25 amplifier - thoughts?
  243. Testing Ck5703 tubes
  244. When can screen voltage be higher than plate???
  245. 31AL10's
  246. Lafayette TE-50 Tube Tester
  247. Acoustic (not Audio) Alchemy - I need a wizzard
  248. current feedback
  249. dac with tube buffer/preamp
  250. Sowter 3607

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