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

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