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  1. Problem with CCS for filaments
  2. UL / Distributed Load - Screen vs. CFB Winding Ratios
  3. 50W PP - KT88 Build
  4. OP Tx and PPP to PP change over
  5. I need a little more advice on a Glassware Janus shunt regularor
  6. Pentode noise
  7. Dynaco ST-35 Circuits
  8. BIG Transformer Covers - Where to Find?
  9. Amplification breaks up after some time
  10. 6A5G schematic; changes from the 6Y6G tube
  11. ECC83 differential preamp optimisation
  12. 6Y6G SE SCHEMATIC NEEDING HELP!
  13. Need help identifying this tube...
  14. AMI DD project. Someone did some mods before me and I don't know whats what.
  15. (v?)Tailor PA-500 Tube Amp
  16. Transformer arrangement?
  17. Don't be stupid, you can't possibly do that with output transformers?
  18. Maximum Plate/Screen Voltage 6550 in UL
  19. Paper insulation for output transformers?
  20. Best PP OPT 30-100W range
  21. Tripath TA2020 + 6N3 Tube buffer
  22. El34 as triode
  23. tube preamp vol ctrl -- before or after?
  24. matisse preamp -review
  25. Ribbon Microphone Preamp
  26. Looking for tubes 6CL8 pentode Triode with lower output ratings
  27. Reducing Signal Level Without Affecting Tone
  28. VTVM/VOM???
  29. Micro amp - all-tube, direct heated, portable and IT FITS
  30. Wiring a 6AS7G to be Push Pull within its own envelope
  31. Wima MKP
  32. Will this circuit work ?
  33. new amp build
  34. MKP DC-LINK vs electrolytic power supply 4 tube amp
  35. Looking for ECC81
  36. Unison Research S6 (old version) auto or fixed bias?
  37. Troubleshooting a restored Edison 12 valve amplifier
  38. Counterpoint SA-220
  39. LTSpice models needed
  40. Magnavox 6V6 amp upgrade
  41. breadboard for tubes
  42. Looking for ideas... 50W OPTs
  43. SE Power Supply PCB
  44. Speakers for the 16LS Stereo Tube Amplifier
  45. will E80CF fit into yaqin 100b
  46. RH84 Rev2 Build w/Premium parts
  47. Single ended KT88 / 6SN7 not enough power
  48. Problem with push-pull KT88
  49. opinions please!
  50. Tube testing 101?
  51. Top aluminum plate from ProtoPanel.com
  52. 6GK5/300B
  53. Screen driven sweep tubes - the return of the evil kink?
  54. Parafeed 45 amps
  55. Has anyone tried the 6p1p EV?
  56. ECC88 mu-follower
  57. Reducing gain of a WE91 type amp
  58. 6sn7 mu-follower
  59. AES Preamp mods
  60. Oh! Darling
  61. Testing 3B22 on Hickok 752a
  62. Has anyone ever used the 6C41C in PP?
  63. RH 6V6
  64. Unholtz-Dickie amp, 4-1000's
  65. Somewhat Newbie..
  66. grounding RCA inputs
  67. ESS9018 I/V
  68. Catode follower with 6N7S (6n7GT)
  69. Recommended RIAA Values for this Circuit
  70. PC board design for PSE amp
  71. Audio Research SP-11 HV Regulator
  72. heathkit SA2
  73. russian 1578 tube production years
  74. partial list of tubes I have
  75. Bench Power Supply Questions ?
  76. Identify this tube?
  77. your input - bulb / led / neon selection for short tester
  78. Potted choke orientation/amp layout
  79. Tamura F-2012
  80. Joining output windings
  81. B&K 650 tube tester
  82. 5687 LTSpice model needed
  83. Can you identify this transformer? 70V line matching?
  84. I had to post this..the 211 in all its glory!
  85. Help with preamp/driver/output setup
  86. Accident - Shorted Cathode to grid!!
  87. Correct B+ for EL84 UL PP
  88. RH807 output transformer....what did you use?
  89. Headphone tube amp with balanced output?
  90. Tube buffer with 6n1p-EV
  91. First little SE
  92. ID Nice Unknown Tube
  93. Bell and Howell Model-601
  94. what should my mulit reader be on to bias yaqin 100b
  95. Fixing an old Tandberg Huldra 6 Radio
  96. 30W sweep tube amp
  97. Atmosphère S-40 with KT88, does someone know about this amp?
  98. What happens when Output transformer max voltage (slightly) exceeded?
  99. what type is the best?
  100. Kiwame carbon resistors
  101. Rocker Switch Wiring
  102. RH6550
  103. Diodes for Marantz 8B
  104. Diodes for Marantz 8B
  105. Telefunken 2430 Opus Resistor Burnout
  106. yaqin 100b with 2 different kt88 valves 2 are Genelex Gold Lion and 2 are Svetlena wi
  107. Conrad Johnson MV40 copy and Fisher OP's
  108. Are EF86 Tubes inherently microphonic?
  109. Counterpoint SA-1000 Hum in left channel Pinging Anatech!
  110. Need a rectifier tube...
  111. Looking for Harman Kardon Allegro A-10 Schematic or PhotoFact.
  112. How much spl can a triode take?
  113. Octal CCDA kit - help needed!
  114. Mod input of 6AU6/6AQ5 amp for iPod
  115. Put a tube on your PC just for fun..
  116. ST35 Cathode Feedback
  117. Series Shunt tube regulator
  118. Help ID this tube ^&$**@# lettering!
  119. Adding a db VU meter to an existing tube mic pre
  120. Quad 22 interstage cap?
  121. 4P1L triode PP (40W!!?)
  122. KT88 shootout vintage vs new vs 90
  123. Help needed to identify this british made Amp
  124. PSU II Question
  125. Quality tube buffer with ECC83
  126. K12g Amp Question
  127. Stark 9-66 tube tester - repair help
  128. output transfo problem
  129. Pair of Fisher CA-40 Oddballs
  130. Model 601 tube amp.
  131. Model 601 Tube amp
  132. First power amp build. Is this normal??
  133. Compactronized 6146
  134. Preamp and inverter on B7G base tubes circuit.
  135. Advice and Suggestions on Amp designs
  136. Help who tube buffer x10-d
  137. EL803S-6CW5 / EL86 amp design check (schematic attached)
  138. amp buzz in one channel on inrush / power on
  139. SE 8-10W monoblock build help
  140. GlassWare Tube CAD
  141. SMD Parts and the DIYer
  142. 6CW5 / EL86 operating point
  143. RH84 power output
  144. 6n6p-ir
  145. Transformer bubbling
  146. Crackling noise.... pls help on Pre-amp
  147. RH84 amp. Plate is 300V. What voltage...
  148. Amplificator Class A 2 X EL504
  149. Help in testing 12ax7 and 7869 tubes
  150. Micro-Cap Tubes Parameters question
  151. Cathode Bypass Capacitor
  152. NOOB ALERT! sooo omany questions.....
  153. IS THIS A REAL E810F ???
  154. Chassis design question / cooling of small signal valves
  155. 5 leads pp output transformer
  156. Vote and Comment: SRPP vs. Aikido vs. Grounded Grid
  157. NEED ADVICE ON THIS SCHEMATIC AND WILL IT WOFK
  158. Help Identifying a Console Pull Amplifier
  159. sunaudio 2A3 circuit...is it good for newbie?
  160. KT120: When does it starts to sing ?
  161. Simple Time Delay (no more excuses for not having one)
  162. Cary SLP-05
  163. 6SN7 Grounded Grid
  164. input selector switch replacement help
  165. help needed with transformer wiring
  166. Tube Schematic Drawig Packages
  167. 12AU7 - 5V4G easy amplifier
  168. Glassware CCA 9-pin PDF
  169. Replacement for the tube 6922 (ECC88)?
  170. Which probes for my first scope?
  171. PP CATHODE BIAS WITH "CCS"
  172. current output tube amplifier
  173. Tube amp for a small room (newbie-like)
  174. What is this old thing from1929?
  175. Arduino cathode current HT etc
  176. Bizzare Output Transformer Connectivity...
  177. OPT to KT88?
  178. Help needed on identifing tube
  179. Amplifier circuit from tube radio
  180. Amplifier circuit from tube radio
  181. Using Valves Library in EAGLE CAD
  182. Biggest noval power pentode?
  183. Akita 12V preamp thoughts
  184. Help, what is this (Marconi 6204) ?
  185. Anyone try DHT 33 or 1Q5 Pentodes wired as Triode?
  186. Would this be a good buy?
  187. Looking for a complete DIY Tube amp
  188. Schematic by TS LIM Pre-amp
  189. Fisher Model 100 'AZ' Mono Amp Rebuild w/ Oscillations
  190. Measuring inductance
  191. Leak stereo 20
  192. Gain and gm of a QQE03/20 anyone ??
  193. Power supply options for tube amplifiers.
  194. CCS question mA
  195. Help wanted with testing and finetuning.
  196. YAQIN VK2100 pre amp
  197. Identify record player and valve
  198. AC Line Filter
  199. blue flash inside 5Y3GT
  200. Heater-Cathode Leakage
  201. Old Tube Kit
  202. Point to Point SET KT88/6550 Build
  203. D3a - MOSFET HYBRID CIRCLOTRON
  204. Aikido CCDA
  205. output impedance
  206. Bizzaro fix for hum problem needs explanation! Pretty Please
  207. Bizzaro fix for hum problem needs explanation! Pretty Please
  208. Questions regarding first build - K-502
  209. Good tube tech in Brooklyn NYC?
  210. Looking for LTspice tube models
  211. Audio Research SP15 : faulty phono stage
  212. Spark 810 looking for the diagram
  213. HP 8903B Question ?
  214. 1955 Hammond Organ Tube Amp
  215. Suggestions Please
  216. Croft Series 4 PL519 regulator
  217. Rectifier ID
  218. Adding headphone output to Darling amp
  219. CLC vs CLCLC Filter Power Supply
  220. Where to get Vacuum Tube Valley magazine?
  221. Magnavox 8802 HELP!!!
  222. Vaa for KT120
  223. Tubes in a Home Theater?
  224. Yaqin mc 10l tube risers?
  225. Wiring an LED strip into an amp?
  226. Need a bit more power :)
  227. yaqin 100b kt88-98 bulb blown and smoking coming from the amp
  228. Amp. 2x5W RV12 P2000driver RL12 P10 final
  229. Layout challange: Dual Maggie AMP148 based.
  230. Replacement PT question
  231. Real Telefunken E88CC?
  232. Any audio differences for EL-84 P-P OPT?
  233. Need help identifying this amplifier.
  234. Can anyone identify this valve / tube?
  235. Pentode-like Triodes
  236. Telefunken EL156 SE experience
  237. Help with a Tubelab SE Power Supply Transformer
  238. 33:1 opt for 5:1 use?
  239. Siemens B30C600 selenium bridge rectifier
  240. ECC81 mu-follower problem
  241. Audio Note M7 line stage preaamp!
  242. Should I upgrade considering.....
  243. Using Wards SE EL84 Transformers for Decware Zenkit1
  244. Parts Box 300b
  245. TO-9105-1 Triodeelectronics output transformer
  246. Need help pairing Martin Logan Sequel II speakers with 4 Watt tube monoblocks
  247. What is your comment about akido linestage?
  248. Driving an EL34 amp without driver stage ?
  249. Mystery Telefunken T9 amp
  250. Improving preamp's bass response.

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