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  1. Eimac 304TH anode question
  2. Is WE310A > 45 > 300B PP possible?
  3. Aikido 5687 PCB - Headphone and C3
  4. Twist-lok caps?
  5. Tube RIAA(something easy)
  6. Testing power pentodes
  7. NTC THERMISTOR as SOFT START for TUBES
  8. NEW ARIA (MENG) MINI 6P1
  9. Basic schematic for Dodd Audio tube buffer?
  10. EL844
  11. 3 channel all tube preamp pedal w/fx loops for all clone build
  12. Tube CAD?
  13. Cap Problem with philco 49-1401
  14. Music Angel
  15. Help 7189A Tubes!
  16. Bulb in cathode?
  17. Gain and volume pots - newbie question
  18. Resistor test TX7525 AMRG CMF55
  19. I think I made a mistake
  20. 12at7 and 12au7
  21. PSE KT88 using Mikael's basic schematic.....
  22. PSU sanity check - negative rail?
  23. Mods Tube Amps/Pre-amp
  24. Help to find out what OPT are these
  25. LL1660 P PZ Lundahl interstage ringing problem GM70pp
  26. Possible PS chokes
  27. Adding Bal output to Akido
  28. Input impedance, the higher the better or not?
  29. Risk of DC coupled input with tube pre-amp ?
  30. UL Cascode phono
  31. DC Imbalance with the LTP
  32. More Wireless World articles archived
  33. Yaqin VK-2100 Static from one channel
  34. Direct Coupled, Self Biasing, CCS Loaded, 300B Amp
  35. Testing a 300A on a B&K
  36. Diodes to tube
  37. PL84/EL86 push pull
  38. circuit diagram
  39. Ultralinear operation
  40. 60hz hum in component system
  41. Crackling Amp
  42. Regulated Supply for Direct Coupled Amp
  43. Explanation wanted
  44. Dynaco FM1 stereo updating ?
  45. tube amp diy off. Is this a good deal?
  46. SE driver
  47. DN2540 + LM317 cascode CCS?
  48. Recapping old tube amp
  49. How a SRPP stage sounds like?
  50. Help troubleshooting SE Pentode amp
  51. What meter for Bias?
  52. Mains tranformer noise
  53. Tube tester block diagram
  54. got a custom 829b amp that i got laying around, need to know what driver to use
  55. Universal filament regulator
  56. ECC88 - 6DJ8 Cascode Plate Curves
  57. Gain of Phase Inverter
  58. CF/CCS, can it be made simpler?
  59. 2A3 Heater Hum Pot
  60. Need help - black out while the amp. was on
  61. simple question about cathodyne PI
  62. Where can I get a cover for the OPT and PS
  63. Power supply for heater
  64. how to use oscilloscope
  65. I am collecting parts for my 200w mono amps "But"
  66. This seems wrong?
  67. StoetKit Junior Schematics
  68. Valve Amplifiers 3rd edition Errata
  69. Anybody ever compared the Eico HF81 to Harman Kardon A220 "The Lute"?
  70. 6v6 datasheet
  71. Leaving filaments on?
  72. output caps -- your observations, pleeze
  73. Low gain preamp.
  74. Recommended Tube/Valve references?
  75. Stand Alone guitar power amp
  76. Tube Socket Identification
  77. Some agreement on reasonable affordable and well performing design builds?
  78. Fletcher cooke OTL article
  79. I have 4 Pl504's. Are they best used as SE or PP ?
  80. More k12g amp musings
  81. How preserve loudness circuit with new volume pot?
  82. Where to find 212E tubes???
  83. Music Angel XD-SE EL34 Amp
  84. CV345 VS EL34
  85. Reducing Filment Hum in Tubes
  86. push pull power amp
  87. 6 ohm speakers....
  88. Need a 12.6 VDC power supply schematic
  89. Gold Lion KT88 Issue
  90. Plate currents in P-P
  91. Bass preamp + Edcor balanced out = HUM!
  92. Testing amplifiers with computer software...
  93. Welborn Labs - Abysmal Service
  94. Repairing broken pins on valuable tube...
  95. Explain how feedback affects DF?
  96. Low emissions
  97. Tube Blue Glow question
  98. Common-mode choke before or after?
  99. 6l6 data sheet question
  100. Mic preamp
  101. Physical Tube Diagnosis?
  102. how and why power amps clip
  103. 80's Guitar Amp...replacing o/p tubes...which 6L6 should i try?
  104. Vacuum Tube OTL power amp!!
  105. Tube replacement options.....
  106. balanced RIAA amp
  107. power amp distortion
  108. Suggestions for 5k5 40W iron?
  109. Peavey Classic 30 Reverb headscratcher...
  110. Schematic Tube Analog Output Stage???
  111. 300B 'direct drive' using a 6U8..
  112. Magnavox 88-02 power trans ratings?
  113. Preamp with humming noise!
  114. How to choose line out transformer?
  115. Tools for Cutting Tube Socket Holes?
  116. Switchable SE.
  117. GZ33 in place of 5U4 can it be done?
  118. phase splitter issue
  119. Armstrong A10 MK2 EL34 mono block
  120. "Ug" The Transformer
  121. i think its time i start playing with caps
  122. problems with preamp on home brew
  123. LS180 Tube Socket?
  124. simple question - 5V heater power supply
  125. Lineamp
  126. FI AUDİO 421 A
  127. Pete Millett has another Red Board for sale
  128. Jolida JD9 Problem
  129. 6N11 = 6N1P ?
  130. K12-G tube amp problem
  131. Please vote for one of the schematics.
  132. Advantages of separate PS for input and output stages
  133. Another PCB tube amp design
  134. Help. Replacement OPT sqrueeechhh.
  135. New concept of a power amp
  136. Lundahl and rectifier mismatch?
  137. Resurrecting weak tubes
  138. Best DHT heater?
  139. Help requested for EL84 SET amp
  140. What did I buy??
  141. Edcor and Custom Power Transformer Design
  142. What would you make with this power TX?
  143. Lundahl 1676
  144. DHT for 300B problem
  145. Newbie question about output transformer to speaker matching
  146. Red board add-on phono/RIAA pre-amp
  147. 2 Chassis amp
  148. Is It posible to bridge two quad II monoblocks?
  149. Power tube at work picture
  150. Tube SE power amp , which one??
  151. Hickok 539A issue
  152. Noise in one channel? Pioneer SX-400
  153. Hartung / Prestla OTL amps
  154. Lafayette Model 417
  155. Extreme plate load
  156. What do you think about this idea
  157. el84pse schem, need advice
  158. Video pentodes as outputs
  159. Custom Vibrolux Reverb noise issue
  160. Chinese "Audio Research" KT88s
  161. Fender bandmaster rectifire problem.
  162. New 6C33 Socket
  163. 2a3 PP output transformer
  164. PSU problem - Murphy is an ***hole!
  165. Best SET design?
  166. Anybody ever tried EBC41 as 12AX7 substitute?
  167. The 7242
  168. 12bh7a
  169. Phase Splitter Help
  170. Oscilloscope Question
  171. sizing opt
  172. 6P3C-E Datasheet help
  173. on the toroids again
  174. OPT problem or Something else 6L6 PP
  175. Look what I found!
  176. Help, Diy tube amp
  177. Idea
  178. a few DIY tube amplifier setups
  179. 6L6 PP amp motorboating
  180. Mayer-inspired 4P1L
  181. 6L6 WGB 2X34W STEREO AMPL
  182. Isolation transformation wiring project help
  183. Tube Amp DIY or Retail
  184. Supplier for GU50 tubes
  185. 2E26's
  186. Encel Stereophonic M.F.B CSM 40 amplifier
  187. Mono 300B SE Amplifier
  188. Broken tubes for 3D Modelling
  189. Loud hum in one channel
  190. 6EM7 PP question
  191. 12AU7/IRF610 Hybrid Amplifier
  192. 12AU7/IRF610 Hybrid Amplifier
  193. RIAA preamplifier
  194. Classic amp, Chinese or scratch-build for Quad ESL?
  195. CLASS A TUBE AMPLIFIER FOR TWEETER
  196. How to gap output transformers?
  197. Cathode bypasses - partial bypass and combination bias
  198. Phase splitter
  199. YS Audio balanced Preamp
  200. Low voltage 12AU7 (19J6) -- re "starving"
  201. phase splitter
  202. JTM30 output transformer
  203. Music Angel Meng 6P1
  204. Is it possible to dampen a partially microphonic 12ax7?
  205. Pioneer SA-810 tube amp.
  206. 6C33 D.C.M.B. - Paging Ari Polisois
  207. Whose is this logo?
  208. What is grid resistance of 807/6l6 in pentode
  209. PAS Upgrade Boards by Epperson
  210. Bang and Olufsen 609k stereo se el84 fm tuner
  211. Finished EL34 tube amp... but oscilates weird..
  212. Scope Trace
  213. Drifty tubes
  214. Choosing plate voltage
  215. Determining Zout for SRPP
  216. PX25 amplifier - thoughts?
  217. Testing Ck5703 tubes
  218. When can screen voltage be higher than plate???
  219. 31AL10's
  220. Lafayette TE-50 Tube Tester
  221. Acoustic (not Audio) Alchemy - I need a wizzard
  222. current feedback
  223. dac with tube buffer/preamp
  224. Sowter 3607
  225. Back to Loftin-White
  226. What to build? (I have a lot of parts)
  227. Grounding chassis through RCA
  228. K40Y-9: Questions And Comments
  229. buffer line stage schematic
  230. Dual triode Thanks for the pre-attenuation link
  231. Help With Alps Volume Pot Noise
  232. 6AM4 driving 45???
  233. Franks 6sn7 line stage question
  234. Edcor power tx XPWR035 issue
  235. Recommend me a schematic for El34 or KT88 ?
  236. RH84 Power supply
  237. Pentode driving a SE triode? any experience?
  238. Big tubes thread
  239. Meng Yayi KT88 MonoBlock
  240. Old Dumont Console - Story and Questions
  241. Newbie GlassWare Aikido All in One Questios
  242. Building my 1st tube amp
  243. A good tube for my SE 5K-8 OPT's
  244. 6c33 - ready, SET, GO
  245. Noisy tube rectifier goes quiet when i put my hand NEAR it
  246. Tweed 5E3 Deluxe Project Problems
  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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