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  1. Power Transformer Hum
  2. Options for how to use this old tube PA amp? > 200W
  3. Flash getter question
  4. Heath W4 Output Xfmr - anyone measure one??
  5. Tube buffer with 6n3-EV
  6. First time with hi-fi, need some advise with amp desing
  7. Newbie wants to build SET 6C33C
  8. Another PP GU50
  9. SE Waveform
  10. Problem with CCS for filaments
  11. UL / Distributed Load - Screen vs. CFB Winding Ratios
  12. 50W PP - KT88 Build
  13. OP Tx and PPP to PP change over
  14. I need a little more advice on a Glassware Janus shunt regularor
  15. Pentode noise
  16. Dynaco ST-35 Circuits
  17. BIG Transformer Covers - Where to Find?
  18. Amplification breaks up after some time
  19. 6A5G schematic; changes from the 6Y6G tube
  20. ECC83 differential preamp optimisation
  21. 6Y6G SE SCHEMATIC NEEDING HELP!
  22. Need help identifying this tube...
  23. AMI DD project. Someone did some mods before me and I don't know whats what.
  24. (v?)Tailor PA-500 Tube Amp
  25. Transformer arrangement?
  26. Don't be stupid, you can't possibly do that with output transformers?
  27. Maximum Plate/Screen Voltage 6550 in UL
  28. Paper insulation for output transformers?
  29. Best PP OPT 30-100W range
  30. Tripath TA2020 + 6N3 Tube buffer
  31. El34 as triode
  32. tube preamp vol ctrl -- before or after?
  33. matisse preamp -review
  34. Ribbon Microphone Preamp
  35. Looking for tubes 6CL8 pentode Triode with lower output ratings
  36. Reducing Signal Level Without Affecting Tone
  37. VTVM/VOM???
  38. Micro amp - all-tube, direct heated, portable and IT FITS
  39. Wiring a 6AS7G to be Push Pull within its own envelope
  40. Wima MKP
  41. Will this circuit work ?
  42. new amp build
  43. Looking for ECC81
  44. Unison Research S6 (old version) auto or fixed bias?
  45. Troubleshooting a restored Edison 12 valve amplifier
  46. Counterpoint SA-220
  47. LTSpice models needed
  48. Magnavox 6V6 amp upgrade
  49. breadboard for tubes
  50. Looking for ideas... 50W OPTs
  51. SE Power Supply PCB
  52. Speakers for the 16LS Stereo Tube Amplifier
  53. will E80CF fit into yaqin 100b
  54. RH84 Rev2 Build w/Premium parts
  55. Single ended KT88 / 6SN7 not enough power
  56. Problem with push-pull KT88
  57. opinions please!
  58. Tube testing 101?
  59. Top aluminum plate from ProtoPanel.com
  60. 6GK5/300B
  61. Screen driven sweep tubes - the return of the evil kink?
  62. Parafeed 45 amps
  63. Has anyone tried the 6p1p EV?
  64. ECC88 mu-follower
  65. Reducing gain of a WE91 type amp
  66. 6sn7 mu-follower
  67. AES Preamp mods
  68. Oh! Darling
  69. Testing 3B22 on Hickok 752a
  70. Has anyone ever used the 6C41C in PP?
  71. RH 6V6
  72. Unholtz-Dickie amp, 4-1000's
  73. Somewhat Newbie..
  74. grounding RCA inputs
  75. ESS9018 I/V
  76. Catode follower with 6N7S (6n7GT)
  77. Recommended RIAA Values for this Circuit
  78. PC board design for PSE amp
  79. Audio Research SP-11 HV Regulator
  80. heathkit SA2
  81. russian 1578 tube production years
  82. partial list of tubes I have
  83. Bench Power Supply Questions ?
  84. Identify this tube?
  85. your input - bulb / led / neon selection for short tester
  86. Potted choke orientation/amp layout
  87. Tamura F-2012
  88. Joining output windings
  89. B&K 650 tube tester
  90. 5687 LTSpice model needed
  91. Can you identify this transformer? 70V line matching?
  92. I had to post this..the 211 in all its glory!
  93. Help with preamp/driver/output setup
  94. Accident - Shorted Cathode to grid!!
  95. Correct B+ for EL84 UL PP
  96. RH807 output transformer....what did you use?
  97. Headphone tube amp with balanced output?
  98. Tube buffer with 6n1p-EV
  99. First little SE
  100. ID Nice Unknown Tube
  101. Bell and Howell Model-601
  102. what should my mulit reader be on to bias yaqin 100b
  103. Fixing an old Tandberg Huldra 6 Radio
  104. 30W sweep tube amp
  105. Atmosphère S-40 with KT88, does someone know about this amp?
  106. What happens when Output transformer max voltage (slightly) exceeded?
  107. what type is the best?
  108. Kiwame carbon resistors
  109. Rocker Switch Wiring
  110. RH6550
  111. Diodes for Marantz 8B
  112. Diodes for Marantz 8B
  113. Telefunken 2430 Opus Resistor Burnout
  114. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  115. Conrad Johnson MV40 copy and Fisher OP's
  116. Are EF86 Tubes inherently microphonic?
  117. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  118. Need a rectifier tube...
  119. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.
  120. How much spl can a triode take?
  121. Octal CCDA kit - help needed!
  122. Mod input of 6AU6/6AQ5 amp for iPod
  123. Put a tube on your PC just for fun..
  124. ST35 Cathode Feedback
  125. Series Shunt tube regulator
  126. Help ID this tube ^&$**@# lettering!
  127. Adding a db VU meter to an existing tube mic pre
  128. Quad 22 interstage cap?
  129. 4P1L triode PP (40W!!?)
  130. KT88 shootout vintage vs new vs 90
  131. Help needed to identify this british made Amp
  132. PSU II Question
  133. Quality tube buffer with ECC83
  134. K12g Amp Question
  135. Stark 9-66 tube tester - repair help
  136. output transfo problem
  137. Pair of Fisher CA-40 Oddballs
  138. Model 601 tube amp.
  139. Model 601 Tube amp
  140. First power amp build. Is this normal??
  141. Compactronized 6146
  142. Preamp and inverter on B7G base tubes circuit.
  143. Advice and Suggestions on Amp designs
  144. Help who tube buffer x10-d
  145. EL803S-6CW5 / EL86 amp design check (schematic attached)
  146. amp buzz in one channel on inrush / power on
  147. SE 8-10W monoblock build help
  148. GlassWare Tube CAD
  149. SMD Parts and the DIYer
  150. 6CW5 / EL86 operating point
  151. RH84 power output
  152. 6n6p-ir
  153. Transformer bubbling
  154. Crackling noise.... pls help on Pre-amp
  155. RH84 amp. Plate is 300V. What voltage...
  156. Amplificator Class A 2 X EL504
  157. Help in testing 12ax7 and 7869 tubes
  158. Micro-Cap Tubes Parameters question
  159. Cathode Bypass Capacitor
  160. NOOB ALERT! sooo omany questions.....
  161. IS THIS A REAL E810F ???
  162. Chassis design question / cooling of small signal valves
  163. 5 leads pp output transformer
  164. Vote and Comment: SRPP vs. Aikido vs. Grounded Grid
  165. NEED ADVICE ON THIS SCHEMATIC AND WILL IT WOFK
  166. Help Identifying a Console Pull Amplifier
  167. sunaudio 2A3 circuit...is it good for newbie?
  168. KT120: When does it starts to sing ?
  169. Simple Time Delay (no more excuses for not having one)
  170. Cary SLP-05
  171. 6SN7 Grounded Grid
  172. input selector switch replacement help
  173. help needed with transformer wiring
  174. Tube Schematic Drawig Packages
  175. 12AU7 - 5V4G easy amplifier
  176. Glassware CCA 9-pin PDF
  177. Replacement for the tube 6922 (ECC88)?
  178. Which probes for my first scope?
  179. PP CATHODE BIAS WITH "CCS"
  180. current output tube amplifier
  181. Tube amp for a small room (newbie-like)
  182. What is this old thing from1929?
  183. Arduino cathode current HT etc
  184. Bizzare Output Transformer Connectivity...
  185. OPT to KT88?
  186. Help needed on identifing tube
  187. Amplifier circuit from tube radio
  188. Amplifier circuit from tube radio
  189. Using Valves Library in EAGLE CAD
  190. Biggest noval power pentode?
  191. Akita 12V preamp thoughts
  192. Help, what is this (Marconi 6204) ?
  193. Anyone try DHT 33 or 1Q5 Pentodes wired as Triode?
  194. Would this be a good buy?
  195. Looking for a complete DIY Tube amp
  196. Schematic by TS LIM Pre-amp
  197. Fisher Model 100 'AZ' Mono Amp Rebuild w/ Oscillations
  198. Measuring inductance
  199. Leak stereo 20
  200. Gain and gm of a QQE03/20 anyone ??
  201. Power supply options for tube amplifiers.
  202. CCS question mA
  203. Help wanted with testing and finetuning.
  204. YAQIN VK2100 pre amp
  205. Identify record player and valve
  206. AC Line Filter
  207. blue flash inside 5Y3GT
  208. Heater-Cathode Leakage
  209. Old Tube Kit
  210. Point to Point SET KT88/6550 Build
  211. D3a - MOSFET HYBRID CIRCLOTRON
  212. Aikido CCDA
  213. output impedance
  214. Bizzaro fix for hum problem needs explanation! Pretty Please
  215. Bizzaro fix for hum problem needs explanation! Pretty Please
  216. Questions regarding first build - K-502
  217. Good tube tech in Brooklyn NYC?
  218. Looking for LTspice tube models
  219. Audio Research SP15 : faulty phono stage
  220. Spark 810 looking for the diagram
  221. HP 8903B Question ?
  222. 1955 Hammond Organ Tube Amp
  223. Suggestions Please
  224. Croft Series 4 PL519 regulator
  225. Rectifier ID
  226. Adding headphone output to Darling amp
  227. CLC vs CLCLC Filter Power Supply
  228. Where to get Vacuum Tube Valley magazine?
  229. Magnavox 8802 HELP!!!
  230. Vaa for KT120
  231. Tubes in a Home Theater?
  232. Yaqin mc 10l tube risers?
  233. Wiring an LED strip into an amp?
  234. Need a bit more power :)
  235. yaqin 100b kt88-98 bulb blown and smoking coming from the amp
  236. Amp. 2x5W RV12 P2000driver RL12 P10 final
  237. Layout challange: Dual Maggie AMP148 based.
  238. Replacement PT question
  239. Real Telefunken E88CC?
  240. Any audio differences for EL-84 P-P OPT?
  241. Need help identifying this amplifier.
  242. Can anyone identify this valve / tube?
  243. Pentode-like Triodes
  244. Telefunken EL156 SE experience
  245. Help with a Tubelab SE Power Supply Transformer
  246. 33:1 opt for 5:1 use?
  247. Siemens B30C600 selenium bridge rectifier
  248. ECC81 mu-follower problem
  249. Audio Note M7 line stage preaamp!
  250. Should I upgrade considering.....

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