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  1. Help me calculator OPT for 807, 6C4C tubes.
  2. Now I have caught the bug - next project
  3. 20W cathode follower amplifier
  4. Muting line level signals
  5. Anywhere in Hong Kong...
  6. RIAA / Pre mod/upgrade
  7. IT WORKS! Tube Phono Stage
  8. 2033 info sought
  9. Pentode Zeus
  10. 5987 (sc968b)
  11. Low Voltage Plate Follower 6DJ8 Buffer Power Supply
  12. JAN Sylvania 7308 vs. JAN Sylvania 6922
  13. recording amp
  14. A Tee-Vee T00b Amp
  15. metal tube lineup for a guitar amp
  16. Locating a bad resistor
  17. MiscEI
  18. ST70 iron recommendations please
  19. need help finding a link . . .
  20. Cathodyne Phase Inverter question
  21. Using a ignition coil for a audio transformer
  22. Multiple primary windings
  23. mcintosh mc3500 clone
  24. B+ Delay
  25. My attempt: 5 element Pentode Spice model
  26. Spelling, capitalization, and grammar.
  27. Power Supply
  28. Output Autotransformers
  29. Multi Section Cap....diy?
  30. Mullard: Tube Circuits for Audio Amplifiers" - Price?
  31. Tube rectifier to Solid state Diodes exchange
  32. Hickok 533A help
  33. Custom Cards For B&K 675 Tester
  34. Peavey Heritage VTX - Bias Question
  35. EMC Model 200 Tube Tester Any Info Pls
  36. Guitar amp PT design questions
  37. Bada PH-1 simple box mod
  38. Tubes Rectifier Help?
  39. How to make sense of LTSpice FFT analysis?
  40. Cascode with local feedback
  41. amps
  42. how to preserve copper plates?
  43. Stereo EL34 amplifier
  44. SA 3000 Counterpoint
  45. tube amp transformer identification
  46. Beginner needs advices for 807 PP project
  47. Heater Power Supply Pspice model
  48. FWCT Rectification
  49. dc or not dc
  50. OTL for dummies.
  51. TCJ Cathode-Coupled Amplifier
  52. 845 Low voltage SE AMP
  53. Vacuum Tube Computer Simulation Modeling
  54. Getting a vintage amp to work
  55. Switched DC/DCconverter for B+
  56. What can I do with this?
  57. Super Pas Two
  58. pspice model of 811A
  59. Question on what is more important B+ or Plate Voltage
  60. Can I trust SPICE?
  61. Power supply filter mod
  62. Does antone interested xxx PCB groupbuy ?
  63. 1 signal ground or two?
  64. Peavey Heritage VTX - Schematics
  65. #47......
  66. Hammond 1650F
  67. 100 watt KT88/6550 Designs
  68. What glue to use for tube glass bulb + base
  69. Tube filaments (heaters) power supply
  70. Quick Ecl86/6gw8 Amp
  71. Need help on eq. hook up for new tube system
  72. Alternatives to the Dynaco ST-70
  73. I need some eq. hook up expert advice please!
  74. Please help identify which plug I need for this socket
  75. Svetlana KT88 winged C's failings
  76. PP amp using 6p15P
  77. Time for another round of "Criticise my Circuit"... err..I mean
  78. Adding a parallel feed on DRD
  79. How hot can resistor stands?
  80. Hybrid amplifier A2 class
  81. Diodes on power supply output for voltage drop?
  82. Converting from single ended parafeed to differential
  83. micro-amp SE with 2,5k OPT+
  84. Unknown Tube Amp
  85. Aikido AC Heater Supply
  86. Help me find some odd looking rectifiers!
  87. So, you may have been wondering...(813 Content !)
  88. Just sharing my 26 experience last night...
  89. Simple 5842-45 SET Amp Design Idea
  90. Yamamoto teflon sockets
  91. new thread, 6BM8 PP build begins...
  92. KT88 Heater Current
  93. 150V plate output tubes
  94. Newbie need to help
  95. Help me please
  96. Elekit TU-870 help
  97. Looking for schematic of Audible Illusion Modulus 3A preamp
  98. Junker Box amp
  99. aikido hybrid with 5 A bias
  100. Shall we compile a list?
  101. drift in direct coupled tubes
  102. Hammond 2XX vs 3XX Power Tranny Questions
  103. Help with this transformer please...
  104. Capacitor upgrade in Paragon 12A
  105. Light bulbs as cathode resistors?
  106. Favorite Threads and Posts in "Tubes" Forum
  107. I need 12v DC- whats the best option?
  108. Beard P35 and Tubes Replacement
  109. Graphic 1/3 Octave Tube Equaliser
  110. GE "Dual Speaker" radio to Harmony H303 conversion : Help, please?
  111. Power Supply Design
  112. Gomes amp
  113. pignose g40v power transformer
  114. Grid battery biased SE output stages
  115. KT88 amp schematic/parts list
  116. Wire Wrap connections for point to point
  117. Aikido Tubes
  118. Recommended tubes for AI Modulus 3A, C-J MV55 and Moscode 300
  119. Schematic Question
  120. EL34 as triode?
  121. Linestage Questions
  122. Help! Building Jax's HFTA
  123. Gobs of AC on ISCO 494
  124. Change step up ratio of input transformer?
  125. LCR RIAA rebuild
  126. common mode choke question
  127. Choosing Choke
  128. Input impedance
  129. Hey Tubelab, Transformer Question
  130. Hybrid Rectifier Check Please !
  131. 1st tube project, tubalizer?
  132. 1st Time project - Report 1
  133. ED-8000 set amp
  134. Hitachi v-202 scope
  135. Cheap and nice looking SE OPT
  136. How much difference 0.22 vs 0.33 cap?
  137. Tubelab SimpleSE
  138. 813 final design?
  139. HPHV regulator, designed by Emile Sprenger
  140. Counterpoint tube amps
  141. SS or tube voltage amplifying stages in an amp with tube output?
  142. 24V Aikido --> 6GM8 with Buffer
  143. Motorboating in Dynaco ST-70
  144. Does such a tube exist?
  145. Noisy PSU?
  146. Bell & Howell amp
  147. Valve Amp with soild state front end
  148. Controlling transient response
  149. Transcendar Budget SE Transformers
  150. Opinion on New Sensor 6SN7GTB?
  151. Determining optimal OT turns ratio
  152. Splitting up the Power Amp
  153. Sowter 5113
  154. Cascoded 6N6P
  155. MachMat or Tentlabs Heater Supply for 300B
  156. Common mode filtering for heater supplies.
  157. Distortion.
  158. 83 rectifier peak repetitive current?
  159. 813 Project has begun !
  160. C3G PX25 DRD - Will it work
  161. 6J5 (Metal Tubes) ....something goes around inside
  162. common-mode chokes
  163. EL-34 and 100k pot
  164. Scott 299 (late) OPT's
  165. Tube magazines
  166. PP plate-choke?
  167. More Phase Splitting Questions
  168. Concertina sanity check
  169. Transformer Specs
  170. The Aikido or Moskido??
  171. KT88 PP suggestion
  172. Ultrapath line amp
  173. Gross loudspeaker cone movement when using tube amps.
  174. Pre-amp power iron advice??
  175. Class A 8417 Amp
  176. DHT output tubes and DC heating
  177. rock music and SE?
  178. Disadvantages of using Zobel and Series notch filter ?
  179. old days source
  180. Mu-follower vs common cathode w/- active load
  181. K40 or K42 Russian PIO: what would you use/recommend?
  182. CCS turning off prematurely?
  183. ESL amp again!
  184. calling Moray James, and others ..wav8 or 6BM8 schemtics--PP.
  185. Does anyone know the output transformer specs of the...
  186. SE EL84 project for my friend
  187. SE amplifier - How much power?
  188. what speakers do you use?
  189. A Tube amp for a Hostille Tube Enviornment
  190. practical choice for an amp
  191. Simple cathode CCS
  192. 2A3s in push pull; class A
  193. 5 VDC heater question
  194. Power transformer snerring.
  195. Subminiature Tube & Tripath Hybrid Integrated
  196. 211
  197. Which of these output tubes?
  198. High Voltage Heater info
  199. 6SL7 in place of a 12AX7?
  200. DHT Tubes
  201. Driving 6AQ5's
  202. schematic wanted
  203. 807s replacing 6L6GCs
  204. Shielded vs twisted pair in internal wiring
  205. tube basics: computing mu and transconductance
  206. Aluminium vs steel chassis
  207. Etf06 & 07
  208. FU 13 tubes
  209. Good Souinding Direct Replacement For 325 / OP 37
  210. how to wire 6.3VDC heater on a heater with center tap (12.6V series, 6.3V parallel)?
  211. The Russian 5U4M is a 5AR4 equivalent ?
  212. WE427A Cold Cathode Diode
  213. reversing polarity in regulated B+ and other question
  214. Anthem Integrated 1
  215. Hickok 800 settings
  216. Advice/Help - Cap upgrade
  217. question on old tube sockets
  218. fisher sa-16 very red tube and?
  219. pros/cons of a 845 VS 211
  220. Preamp Power and Voltage Output
  221. Anyone seen these 6L6GCs before?
  222. online transformer info for newbies
  223. High voltage pseudo-triode
  224. Yes, again: mains-powered KILLER amp without a power transformer.
  225. Quicksilver 300b monoblock (KT88 conversion)
  226. Output transformer (SE) - DIY
  227. is Gary Pimm still around?
  228. carbon composition - 2 types
  229. Input attenuation on Leak amp
  230. 101D Sockets
  231. PC86, '88 RF Amplifiers
  232. Jolida SJ-302A tube swap
  233. Inductance for tweeter OPT
  234. Help me.......What is the 6SN7 ???????
  235. high DCR secondary (power transformer)
  236. Transformer power formula Help???
  237. 2A3 OTL 800 Ohm Speaker
  238. Trying to find specs on transformer core material
  239. 12AX7 suggestions?
  240. power supply (cap input)
  241. is it safe to connect these secondaries in series?
  242. Peter Millett's Uniamp with KT88
  243. Mystery transformer
  244. Can I phase split like this?
  245. How to model psud2 using tube regulator?
  246. Choke-loaded 6C33C stage
  247. EL84 as both driver and output stage.
  248. Silvertone (Sears) stereo amp
  249. Chasing hum in a new tube amp
  250. Zenith K731 AM/FM radio audio random cracking sound in FM mode

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