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  1. German transformer builder
  2. 6P30B-V subminiature tube
  3. Improved Tube Headphones Amp
  4. Best method of reducing line voltage into vintage transformers?
  5. Harman-Kardon TA5000X, A500 or A50K OPT - Quality?
  6. hum measurement
  7. DIY 450VA+ multi-tapped tube power trafo
  8. DIY 450VA+ multi-tapped tube power trafo
  9. Duelund Alexander Copper Foil Capacitors
  10. Yaqin MS-20L tube recommendation
  11. Tube version of aleph-x. Is it possible?
  12. help - Looking for specs Trimax TA1439
  13. where can i get transformers in the UK?
  14. Mono 5W-17W Power Amp using EL84 push-pull
  15. Reference Books
  16. Tresco?
  17. BELL 3DT, Phono RIAA Odditty
  18. 6SL7/6V6 tubes in an RH84 SE amplifier?
  19. How to calculate max voltage swing in cathode follower?
  20. Power Transformer Temp
  21. Silvaweld OTL Tube Reference 100 schematics
  22. Need suggestion for 6.3V-0-6.3V
  23. Unison Research SMART 845
  24. 26/45 SE amp ?
  25. V2 rocket guidance system.
  26. Sweep Tube SEP
  27. Help me find cirquit, I forgot where I last saw it?
  28. Passive or Active? For Wet/Dry mix on valve driven reverb.
  29. Plate resistor for FVP5a
  30. Simulation
  31. DHT w/ DC heater - How to rig cathode bias?
  32. schematics needed- Luxman MQ70
  33. CSS for 6c33?
  34. Svetlana (Winged C) 6L6GC vs. the Others...
  35. Power Supply Help- 807's, High Voltage
  36. Looking for info about a 1940s Amp
  37. More amplifiers in the Wireless World Archive
  38. why does my amp require a preamp?
  39. Why two GZ34 in this schematic?
  40. Floating Dc heaters, capacitor to ground
  41. anyone have experience with 1J17B tube
  42. Preventing arcing on standby switch?
  43. Help with buzzing mains transformer
  44. Balanced Amp Topology
  45. ECC33
  46. Distortion spectrum vs feedback
  47. Heaters question
  48. Why do transformers have such*&%#* hardware?
  49. what's my fisher 400 off gassing?
  50. Executone schematic needed
  51. parafeed output amplifier
  52. B+K 500 Testor Question
  53. CCCP SUBTUBE: my last project
  54. Aikido Line-Stage jumper question
  55. Tube Amplifier to power Gale GS401 speakers
  56. Bypass Cap on cathode?
  57. How to measure/calculate dB of negative feedback?
  58. Need your advices & experiences
  59. Parmeko gresham transformers specifications
  60. Valve cascodes for Phono input.
  61. ST-70 XLR Balanced Driver Boad
  62. I'm new here any places for like us newbies?
  63. Noob looking for some advice
  64. Stand Alone guitar power amp for evaluation
  65. QQE04/5 Curves
  66. Help on Audio Research D79A adjustment
  67. lazarus preamp hums even with volume down and no components connected.
  68. Troubles when elevating a LT supply
  69. Turning up the heat: cathode bias
  70. Anyone build Dynaco Mk IIIs with Sullivan boards?
  71. Lowering gain on Frank's 6SN7 preamp
  72. Pro amp input modification
  73. Sanity of compactron for "integrated" headphone amp?
  74. vdc drop
  75. HELP - SMART 845 or 300B SE
  76. DC Servo - Direct Coupling Applications?
  77. Edison 12 amplifier
  78. Mounting terminal strips to blank copper board
  79. 6C33C tube socket for GM70 tube??
  80. Fisher X100C 2 sets speakers?
  81. 4P1L DHT Line Stage
  82. Trying to identify an old radio tube
  83. Yaqin CD3 upgrading caps help for novice
  84. push pull adjustable fixed bias
  85. Another SE amp design.
  86. Chassis to experiment with....
  87. Ray Butts Echosonic #27
  88. Ampeg Reverberocket II Hum
  89. What coupling capacitor values are common
  90. Yamamoto A-09s
  91. 9001 variant of Acorn 954 Pentode
  92. Khron-Hite UHR220 tube power source
  93. Grounding the 4ohm tap
  94. Rectifier mechanical buzz
  95. Informed opinion(s) on phase inversion?
  96. Computer grade electrolytics
  97. Strange problem with Grundig CS200 tube receiver
  98. Puresound P10 RIAA
  99. Need help on DIY Toccata Phono Preamp
  100. Single 6EB8 tube kit?
  101. SE OPT as PS choke
  102. Best input DHT tube?
  103. Stainless Steel Chassis Polishing
  104. Hm, which order to replace 2 out of 4 tubes?
  105. EL34 Musical Machine Output XFMR suggestions
  106. Driver stage to finals newbie questions - (I hope not dumb questions)
  107. Preamp with single 12ax7 Ecc83 for stereo?
  108. Ming-Da MC-300B845 schematic needed
  109. My RH84 Build - first amp after a 25 year break -:)
  110. Jolida 502a Snubber Mod
  111. Again
  112. KT120, PSE
  113. 6v6 bias with cathodyne
  114. How did the "magic eye" work on old valve radios ?
  115. High voltage switching
  116. High voltage switching
  117. EF184 as ccs / design questions / spice model
  118. ECC807
  119. Chassis thickness
  120. Compactron 6C10 & 6Q11/6K11 tube data
  121. Output voltage guitar preamp
  122. Reverse Engineering leads from Tube amp
  123. Did you all see this??
  124. WESTREX 60 WATT AMP
  125. Johari's audio system
  126. el95 single ended amp project needs help with preamp
  127. SS Rectifers and Zero-Crossing Distortion, possible fix or idotic idea?
  128. 3 ways active crossover
  129. 5691 tube tonal balance
  130. Dynaco Mark III chassis
  131. variac - breadboard with choke input
  132. Stancor A-8053 Output Transformer - opinions wanted!
  133. Nice OPT's for headphone amp...
  134. Eimac 304TH anode question
  135. Is WE310A > 45 > 300B PP possible?
  136. Aikido 5687 PCB - Headphone and C3
  137. Twist-lok caps?
  138. Tube RIAA(something easy)
  139. Testing power pentodes
  140. NTC THERMISTOR as SOFT START for TUBES
  141. NEW ARIA (MENG) MINI 6P1
  142. Basic schematic for Dodd Audio tube buffer?
  143. EL844
  144. 3 channel all tube preamp pedal w/fx loops for all clone build
  145. Tube CAD?
  146. Cap Problem with philco 49-1401
  147. Music Angel
  148. Help 7189A Tubes!
  149. Bulb in cathode?
  150. Gain and volume pots - newbie question
  151. Resistor test TX7525 AMRG CMF55
  152. I think I made a mistake
  153. 12at7 and 12au7
  154. PSE KT88 using Mikael's basic schematic.....
  155. PSU sanity check - negative rail?
  156. Mods Tube Amps/Pre-amp
  157. Help to find out what OPT are these
  158. LL1660 P PZ Lundahl interstage ringing problem GM70pp
  159. Possible PS chokes
  160. Adding Bal output to Akido
  161. Input impedance, the higher the better or not?
  162. Risk of DC coupled input with tube pre-amp ?
  163. UL Cascode phono
  164. DC Imbalance with the LTP
  165. More Wireless World articles archived
  166. Yaqin VK-2100 Static from one channel
  167. Direct Coupled, Self Biasing, CCS Loaded, 300B Amp
  168. Testing a 300A on a B&K
  169. Diodes to tube
  170. PL84/EL86 push pull
  171. circuit diagram
  172. Ultralinear operation
  173. 60hz hum in component system
  174. Crackling Amp
  175. Regulated Supply for Direct Coupled Amp
  176. Explanation wanted
  177. Dynaco FM1 stereo updating ?
  178. tube amp diy off. Is this a good deal?
  179. SE driver
  180. DN2540 + LM317 cascode CCS?
  181. Recapping old tube amp
  182. How a SRPP stage sounds like?
  183. Help troubleshooting SE Pentode amp
  184. What meter for Bias?
  185. Mains tranformer noise
  186. Tube tester block diagram
  187. got a custom 829b amp that i got laying around, need to know what driver to use
  188. Universal filament regulator
  189. ECC88 - 6DJ8 Cascode Plate Curves
  190. Gain of Phase Inverter
  191. CF/CCS, can it be made simpler?
  192. 2A3 Heater Hum Pot
  193. Need help - black out while the amp. was on
  194. simple question about cathodyne PI
  195. Where can I get a cover for the OPT and PS
  196. Power supply for heater
  197. how to use oscilloscope
  198. I am collecting parts for my 200w mono amps "But"
  199. This seems wrong?
  200. StoetKit Junior Schematics
  201. Valve Amplifiers 3rd edition Errata
  202. Anybody ever compared the Eico HF81 to Harman Kardon A220 "The Lute"?
  203. 6v6 datasheet
  204. Leaving filaments on?
  205. output caps -- your observations, pleeze
  206. Low gain preamp.
  207. Recommended Tube/Valve references?
  208. Stand Alone guitar power amp
  209. Tube Socket Identification
  210. Some agreement on reasonable affordable and well performing design builds?
  211. Fletcher cooke OTL article
  212. I have 4 Pl504's. Are they best used as SE or PP ?
  213. More k12g amp musings
  214. How preserve loudness circuit with new volume pot?
  215. Where to find 212E tubes???
  216. Music Angel XD-SE EL34 Amp
  217. CV345 VS EL34
  218. Reducing Filment Hum in Tubes
  219. push pull power amp
  220. 6 ohm speakers....
  221. Need a 12.6 VDC power supply schematic
  222. Gold Lion KT88 Issue
  223. Plate currents in P-P
  224. Bass preamp + Edcor balanced out = HUM!
  225. Testing amplifiers with computer software...
  226. Welborn Labs - Abysmal Service
  227. Repairing broken pins on valuable tube...
  228. Explain how feedback affects DF?
  229. Low emissions
  230. Tube Blue Glow question
  231. Common-mode choke before or after?
  232. 6l6 data sheet question
  233. Mic preamp
  234. Physical Tube Diagnosis?
  235. how and why power amps clip
  236. 80's Guitar Amp...replacing o/p tubes...which 6L6 should i try?
  237. Vacuum Tube OTL power amp!!
  238. Tube replacement options.....
  239. balanced RIAA amp
  240. power amp distortion
  241. Suggestions for 5k5 40W iron?
  242. Peavey Classic 30 Reverb headscratcher...
  243. Schematic Tube Analog Output Stage???
  244. 300B 'direct drive' using a 6U8..
  245. Magnavox 88-02 power trans ratings?
  246. Preamp with humming noise!
  247. How to choose line out transformer?
  248. Tools for Cutting Tube Socket Holes?
  249. Switchable SE.
  250. GZ33 in place of 5U4 can it be done?

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