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  1. Profiteering from Gordan Rankin Designs
  2. Gain/Schematic Question
  3. Heath Distortion Measurement Set HD-1
  4. Tube troubleshooting question
  5. Speaker tube amp with headphones
  6. Gain of 6AK5
  7. R vs. RC on secondaries
  8. My simple 5010 amplifiers
  9. constant current sources...
  10. Critical resistors
  11. Digital tube designs?
  12. 2A3 SE Amp
  13. Dact closeout
  14. Mysterious runaway output tube
  15. Ampex 351 Power Transformer
  16. better the Pass camp?
  17. My first tube amp kit.
  18. Plate Resistor
  19. EZ81 tube rectifier
  20. 4K:10K interstage
  21. DIY in New York City
  22. dead project, new life?
  23. Interesting Read On 300B's
  24. Low voltage tubes
  25. Perser SA20 Restoration
  26. IP headroom with LTP splitter
  27. Triode strapping 6l6gc PP
  28. Question on design
  29. pin outs on Hammond tube amp?
  30. cathode follower
  31. Positive feedback online issue #16
  32. el84 help
  33. RIAA help
  34. Advise for my first tube amplifier, please
  35. My 50/10Y amp with hybrid PSU... am I doing the standby switch right?
  36. What can I build with this iron?
  37. Hey Planet_10 (and others)
  38. Tube sockets for Harmon-K Citation II
  39. Question on ZZ-1000/8228
  40. noise analysis
  41. Help wanted with fixing french DRG valve preamp....
  42. How hot are they supposed to get?
  43. EF86 Triode Mode
  44. Using a 6SL7 in a tube overdrive pedal instead of 12AX7?
  45. naive questions
  46. Rozenblits Grounded grid preamp layout
  47. Help extend the life of my 805's
  48. Difference between 5687, 5687WA and 5687WB tubes?
  49. The first tube "integrated circuit" (1926)
  50. Fix loose connection in base with solder pot?
  51. 91a 300b conversion to 2a3
  52. Adams Amp Discussion, please help! :)
  53. Had a bad accident with my TT21 today.
  54. Different sound for CD Tube Player
  55. Tube audio transformer
  56. Hybrid Srpp
  57. "it is just SO hard to get bad sound from EL84 PP amp"
  58. Wire types??
  59. triode vs. pentode for pp output.
  60. 6GK5 vs. EC95/6ER5
  61. 25BQ6GTB?? Any Good?
  62. do pp output tubes have to be matched?
  63. Ampex 600 pre
  64. line-stage preamp tubes? which ones to use...
  65. Another timekiller project
  66. 6sn7GT
  67. problem with EL84 PP amp
  68. a speaker whose load varies too much for an OTL
  69. Mystery manufacturer/distributor
  70. 37s Anyone?
  71. sv811-10 push pull
  72. 416B dangerous tube?
  73. blew my amp because of distortion pedal
  74. Help with Tube Phono Output Impedance
  75. Minimum current for choke operation
  76. stored energy in output transformer?
  77. socket mounting depth
  78. Parafeeding a push pull
  79. Different direct heating styles?
  80. The most simple tube preamp
  81. Sample/hold DC servo circuit
  82. Interstage transformer as OPT?
  83. What can you do with cheap 1kV power?
  84. Flashing Rectifier Tube- Bad Thing?
  85. Amp for my speakers, PLEASE Help
  86. suitable preamp for a tube amp (kt88+12ax7)
  87. anyone know of a kit to make tube night light?
  88. Sprague capasitor id
  89. Question on Tango XE-20S
  90. 6SL7 diff pair - how to set up????
  91. Hwat should be the best driver for a 520V2 ?
  92. problem: half power on push-pull ?
  93. Triode Dick/FdeGrove 2A3 PP amplifier
  94. PSU for perusal
  95. Kt66 Gec Replica
  96. 6as7
  97. Please confirm my transformer math.
  98. Anything wrong with this design?
  99. Buffer Line Pre-Amp Power Tx
  100. Why filter in tube DAC?
  101. advances in tube amp design?
  102. How to determine grid leak current?
  103. dissimilar triode for White cathode follower?
  104. tube rectifier
  105. 6Vdc from 6,3Vac
  106. Computer Grade Cap or Inverter Grade Cap???
  107. Peculiar Sovtek EL34 bevaviour
  108. 5AS4 sub for 5U4
  109. Preamp hum again
  110. Modifying amp to accept different tubes (Newbie alert!)
  111. Quetion for Thorsten
  112. OPT axis
  113. Schematic Counterpoint SA3.1 and SA-9
  114. optimizing constant current heater supply
  115. Valve Art KT100
  116. baxandall tone control
  117. Kofi Annan in: "Brownin' Out!"
  118. strange tube
  119. Monarch SA-30 Schematic
  120. Power Supply for 300B Monoblock
  121. Matisse Line Amp
  122. Panel mounting on a woode case
  123. Hardware??
  124. another way to turn a pentode or tetrode into a triode
  125. 0Z4 as a rectifier?
  126. Unused HV windings on power transformer
  127. Mundorf M-Lytic and Silver-in-Oil Capacitors
  128. grainy preamp gain
  129. Need help with PS for 1626 "Darling" amp
  130. questions about power supply for 6l6 pp
  131. Proof that demagnetizing tubes works
  132. ECC88/5687/2A3 amp voltages
  133. What can I do with these? (tube and OPT question)
  134. Blowing fuses
  135. questions about transfo
  136. Common Cathode Resistor
  137. Why a Zobel network across OPT primary or secondary?
  138. Morgan Jones "Valve Amplifiers"
  139. Why?
  140. 833 push pull design help
  141. Lamm schematics
  142. Mu Followers -- ressources?
  143. Pennsylvania DIY's
  144. Interstage trans? Yes please!
  145. What's wrong with UL anyway ?
  146. SE amp like mcintosh ?
  147. 300b Push Pull Interstage Tsf
  148. amp stages...
  149. Heater supply recommendation for 6922?
  150. hi-end?
  151. Just a quicky
  152. Question on Mains Transformer
  153. Help! Who is the dirtributors of 6V4/EZ80 and 6H30/6N30?
  154. SE 6AS7 amp question
  155. Timed switch on B+ in power supply, good idea?
  156. Parts Sourcing
  157. Power Supply Question
  158. tube amp kits
  159. in search of a schematic
  160. heater wiring
  161. 5A/152M perfect driver? SPICE?
  162. 12AU7 -> 12BH7 Do I need to change Rp?
  163. Need help understanding transformer impedance ratios and impedance matching
  164. Audio schematics for GU50 ????
  165. 6sn7 & 6sn7GTB
  166. Tube amp schematic - any thoughts?
  167. tube distortion effect.
  168. tube rolling Blue Circle BC 21 preamp
  169. A sorry tale which will make you cry !!!
  170. Variac problems
  171. tubeamp project, weekend timekiller
  172. isolated supply grounding
  173. Car preamp with Aikido
  174. Audio Note M1 potentiometer question
  175. Beginner , tube kit suggestions please
  176. Question on OPT
  177. Telefunken S80 Stereo ECL82 Amp- any comment?
  178. Active crossovers using Tubes
  179. 300BSE power amplifier circuit
  180. tube buffer using 12bz7
  181. "Complete" SE KT88
  182. Output Tube biasing for Toroidal Output Transformer
  183. Cardas Golden Capacitors
  184. Tube Buffer for CD-PRO2M (6922)
  185. Troubleshooting fuse blowing
  186. Billington valves and quallity
  187. Regulated PSU, your comments please.
  188. Change coupling cap from .47uf to 2.2uf
  189. RIAA Schematics?
  190. Line out for subwoofer in tube amps
  191. Feedback in IT coupled amps?
  192. Filemant Voltage
  193. DC compensated SE output transformer
  194. Winding an audio transformer
  195. Tube effects Loop Schematics... ?
  196. KT100...what's this ??
  197. Help measuring output impedience
  198. tubes
  199. Need PP KT-88 amp design and KT-88 for triode use?
  200. 7241 tube
  201. Max B+ for 807 UL?
  202. Problem with my Darling!
  203. Effect of cross-coupled "local" FB on plate load of previous stage
  204. DC coupled long tailed pairs
  205. I need an advice for these tubes..
  206. Anode Resistors on PPP Amps
  207. help with modifing a H/K A500 amp
  208. Damper Diode Musings
  209. Heater Question
  210. Push pull designs.
  211. Anybody heard about Tarzian Silicon Rectifier for Tube Rectifier Replacement?
  212. Voice of Music 555 phonograph
  213. Direct driving of GM70 by one ECL86 ???
  214. Bogen amp schematic
  215. 6336a
  216. Power transformer colors & wiring
  217. Stepped Attenuator and Selector Switch
  218. Music without speakers? Need help.
  219. el84 ultra linear datat sheet
  220. 2a3 layout
  221. Matisse Ref per amp
  222. Recommendations for Simple SET Amp Topologies
  223. HV power supply repair
  224. Grundig Model 3265U Restore?
  225. Valve Art EL 156!
  226. Classe A 6550 40W
  227. Lafayette Bypass Option
  228. Plate curves or Op Point for 6KN8?
  229. 12e1 sub for 807 ?
  230. Extremely low power and low loss transformers
  231. looking for power supply diagram SE 813 45 Watt
  232. How to make this 6C33C better??
  233. All octal 6AS7 PP amp is it possible?
  234. Toroids VS EI Transfomers
  235. Bias secrets for a HH Scott 233?!?
  236. new idea of DHT heater supply
  237. UL40-S2 schematic
  238. Eastern Audio transformers: any good?
  239. Tube monster amplifier
  240. Big pentode help!
  241. which one?
  242. system matching
  243. a 5ar4 problem
  244. coupling capacitor intermediate values
  245. Quicksilver Mono 60 upgrades
  246. Can anything be done
  247. OTL ECC88 amp
  248. Bridging Mono Blocks
  249. Cathode-coupled Phase Splitter Formula
  250. Drd 45, 300b

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