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  1. Silvaweld OTL Tube Reference 100 schematics
  2. Need suggestion for 6.3V-0-6.3V
  3. Unison Research SMART 845
  4. 26/45 SE amp ?
  5. V2 rocket guidance system.
  6. Sweep Tube SEP
  7. Help me find cirquit, I forgot where I last saw it?
  8. Passive or Active? For Wet/Dry mix on valve driven reverb.
  9. Plate resistor for FVP5a
  10. Simulation
  11. DHT w/ DC heater - How to rig cathode bias?
  12. schematics needed- Luxman MQ70
  13. CSS for 6c33?
  14. Svetlana (Winged C) 6L6GC vs. the Others...
  15. Power Supply Help- 807's, High Voltage
  16. Looking for info about a 1940s Amp
  17. More amplifiers in the Wireless World Archive
  18. why does my amp require a preamp?
  19. Why two GZ34 in this schematic?
  20. Floating Dc heaters, capacitor to ground
  21. anyone have experience with 1J17B tube
  22. Preventing arcing on standby switch?
  23. Help with buzzing mains transformer
  24. Balanced Amp Topology
  25. ECC33
  26. Distortion spectrum vs feedback
  27. Heaters question
  28. Why do transformers have such*&%#* hardware?
  29. what's my fisher 400 off gassing?
  30. Executone schematic needed
  31. parafeed output amplifier
  32. B+K 500 Testor Question
  33. CCCP SUBTUBE: my last project
  34. Aikido Line-Stage jumper question
  35. Tube Amplifier to power Gale GS401 speakers
  36. Bypass Cap on cathode?
  37. How to measure/calculate dB of negative feedback?
  38. Need your advices & experiences
  39. Parmeko gresham transformers specifications
  40. Valve cascodes for Phono input.
  41. ST-70 XLR Balanced Driver Boad
  42. I'm new here any places for like us newbies?
  43. Noob looking for some advice
  44. Stand Alone guitar power amp for evaluation
  45. QQE04/5 Curves
  46. Help on Audio Research D79A adjustment
  47. lazarus preamp hums even with volume down and no components connected.
  48. Troubles when elevating a LT supply
  49. Turning up the heat: cathode bias
  50. Anyone build Dynaco Mk IIIs with Sullivan boards?
  51. Lowering gain on Frank's 6SN7 preamp
  52. Pro amp input modification
  53. Sanity of compactron for "integrated" headphone amp?
  54. vdc drop
  55. HELP - SMART 845 or 300B SE
  56. DC Servo - Direct Coupling Applications?
  57. Edison 12 amplifier
  58. Mounting terminal strips to blank copper board
  59. 6C33C tube socket for GM70 tube??
  60. Fisher X100C 2 sets speakers?
  61. 4P1L DHT Line Stage
  62. Trying to identify an old radio tube
  63. Yaqin CD3 upgrading caps help for novice
  64. push pull adjustable fixed bias
  65. Another SE amp design.
  66. Chassis to experiment with....
  67. Ray Butts Echosonic #27
  68. Ampeg Reverberocket II Hum
  69. What coupling capacitor values are common
  70. Yamamoto A-09s
  71. 9001 variant of Acorn 954 Pentode
  72. Khron-Hite UHR220 tube power source
  73. Grounding the 4ohm tap
  74. Rectifier mechanical buzz
  75. Informed opinion(s) on phase inversion?
  76. Computer grade electrolytics
  77. Strange problem with Grundig CS200 tube receiver
  78. Puresound P10 RIAA
  79. Need help on DIY Toccata Phono Preamp
  80. Single 6EB8 tube kit?
  81. SE OPT as PS choke
  82. Best input DHT tube?
  83. Stainless Steel Chassis Polishing
  84. Hm, which order to replace 2 out of 4 tubes?
  85. EL34 Musical Machine Output XFMR suggestions
  86. Driver stage to finals newbie questions - (I hope not dumb questions)
  87. Preamp with single 12ax7 Ecc83 for stereo?
  88. Ming-Da MC-300B845 schematic needed
  89. My RH84 Build - first amp after a 25 year break -:)
  90. Jolida 502a Snubber Mod
  91. Again
  92. KT120, PSE
  93. 6v6 bias with cathodyne
  94. How did the "magic eye" work on old valve radios ?
  95. High voltage switching
  96. High voltage switching
  97. EF184 as ccs / design questions / spice model
  98. ECC807
  99. Chassis thickness
  100. Compactron 6C10 & 6Q11/6K11 tube data
  101. Output voltage guitar preamp
  102. Reverse Engineering leads from Tube amp
  103. Did you all see this??
  104. WESTREX 60 WATT AMP
  105. Johari's audio system
  106. el95 single ended amp project needs help with preamp
  107. SS Rectifers and Zero-Crossing Distortion, possible fix or idotic idea?
  108. 3 ways active crossover
  109. 5691 tube tonal balance
  110. Dynaco Mark III chassis
  111. variac - breadboard with choke input
  112. Stancor A-8053 Output Transformer - opinions wanted!
  113. Nice OPT's for headphone amp...
  114. Eimac 304TH anode question
  115. Is WE310A > 45 > 300B PP possible?
  116. Aikido 5687 PCB - Headphone and C3
  117. Twist-lok caps?
  118. Tube RIAA(something easy)
  119. Testing power pentodes
  120. NTC THERMISTOR as SOFT START for TUBES
  121. NEW ARIA (MENG) MINI 6P1
  122. Basic schematic for Dodd Audio tube buffer?
  123. EL844
  124. 3 channel all tube preamp pedal w/fx loops for all clone build
  125. Tube CAD?
  126. Cap Problem with philco 49-1401
  127. Music Angel
  128. Help 7189A Tubes!
  129. Bulb in cathode?
  130. Gain and volume pots - newbie question
  131. Resistor test TX7525 AMRG CMF55
  132. I think I made a mistake
  133. 12at7 and 12au7
  134. PSE KT88 using Mikael's basic schematic.....
  135. PSU sanity check - negative rail?
  136. Mods Tube Amps/Pre-amp
  137. Help to find out what OPT are these
  138. LL1660 P PZ Lundahl interstage ringing problem GM70pp
  139. Possible PS chokes
  140. Adding Bal output to Akido
  141. Input impedance, the higher the better or not?
  142. Risk of DC coupled input with tube pre-amp ?
  143. UL Cascode phono
  144. DC Imbalance with the LTP
  145. More Wireless World articles archived
  146. Yaqin VK-2100 Static from one channel
  147. Direct Coupled, Self Biasing, CCS Loaded, 300B Amp
  148. Testing a 300A on a B&K
  149. Diodes to tube
  150. PL84/EL86 push pull
  151. circuit diagram
  152. Ultralinear operation
  153. 60hz hum in component system
  154. Crackling Amp
  155. Regulated Supply for Direct Coupled Amp
  156. Explanation wanted
  157. Dynaco FM1 stereo updating ?
  158. tube amp diy off. Is this a good deal?
  159. SE driver
  160. DN2540 + LM317 cascode CCS?
  161. Recapping old tube amp
  162. How a SRPP stage sounds like?
  163. Help troubleshooting SE Pentode amp
  164. What meter for Bias?
  165. Mains tranformer noise
  166. Tube tester block diagram
  167. got a custom 829b amp that i got laying around, need to know what driver to use
  168. Universal filament regulator
  169. ECC88 - 6DJ8 Cascode Plate Curves
  170. Gain of Phase Inverter
  171. CF/CCS, can it be made simpler?
  172. 2A3 Heater Hum Pot
  173. Need help - black out while the amp. was on
  174. simple question about cathodyne PI
  175. Where can I get a cover for the OPT and PS
  176. Power supply for heater
  177. how to use oscilloscope
  178. I am collecting parts for my 200w mono amps "But"
  179. This seems wrong?
  180. StoetKit Junior Schematics
  181. Valve Amplifiers 3rd edition Errata
  182. Anybody ever compared the Eico HF81 to Harman Kardon A220 "The Lute"?
  183. 6v6 datasheet
  184. Leaving filaments on?
  185. output caps -- your observations, pleeze
  186. Low gain preamp.
  187. Recommended Tube/Valve references?
  188. Stand Alone guitar power amp
  189. Tube Socket Identification
  190. Some agreement on reasonable affordable and well performing design builds?
  191. Fletcher cooke OTL article
  192. I have 4 Pl504's. Are they best used as SE or PP ?
  193. More k12g amp musings
  194. How preserve loudness circuit with new volume pot?
  195. Where to find 212E tubes???
  196. Music Angel XD-SE EL34 Amp
  197. CV345 VS EL34
  198. Reducing Filment Hum in Tubes
  199. push pull power amp
  200. 6 ohm speakers....
  201. Need a 12.6 VDC power supply schematic
  202. Gold Lion KT88 Issue
  203. Plate currents in P-P
  204. Bass preamp + Edcor balanced out = HUM!
  205. Testing amplifiers with computer software...
  206. Welborn Labs - Abysmal Service
  207. Repairing broken pins on valuable tube...
  208. Explain how feedback affects DF?
  209. Low emissions
  210. Tube Blue Glow question
  211. Common-mode choke before or after?
  212. 6l6 data sheet question
  213. Mic preamp
  214. Physical Tube Diagnosis?
  215. how and why power amps clip
  216. 80's Guitar Amp...replacing o/p tubes...which 6L6 should i try?
  217. Vacuum Tube OTL power amp!!
  218. Tube replacement options.....
  219. balanced RIAA amp
  220. power amp distortion
  221. Suggestions for 5k5 40W iron?
  222. Peavey Classic 30 Reverb headscratcher...
  223. Schematic Tube Analog Output Stage???
  224. 300B 'direct drive' using a 6U8..
  225. Magnavox 88-02 power trans ratings?
  226. Preamp with humming noise!
  227. How to choose line out transformer?
  228. Tools for Cutting Tube Socket Holes?
  229. Switchable SE.
  230. GZ33 in place of 5U4 can it be done?
  231. phase splitter issue
  232. Armstrong A10 MK2 EL34 mono block
  233. "Ug" The Transformer
  234. i think its time i start playing with caps
  235. problems with preamp on home brew
  236. LS180 Tube Socket?
  237. simple question - 5V heater power supply
  238. Lineamp
  239. FI AUDİO 421 A
  240. Pete Millett has another Red Board for sale
  241. Jolida JD9 Problem
  242. 6N11 = 6N1P ?
  243. K12-G tube amp problem
  244. Please vote for one of the schematics.
  245. Advantages of separate PS for input and output stages
  246. Another PCB tube amp design
  247. Help. Replacement OPT sqrueeechhh.
  248. New concept of a power amp
  249. Lundahl and rectifier mismatch?
  250. Resurrecting weak tubes

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