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  1. Tube rectifier to diode
  2. The Trioderizer
  3. increasing coupling capacitor value in we 91
  4. diy SE Tube Amp
  5. Max power possible from 6L6 with 6.6k load?
  6. OPT grounding question
  7. SE sound vs Ultra Linear sound
  8. Modify & build out (2) Western Electric 300B / 2A3 Hammond monoblock amps & UTC LS-5
  9. 6N6P or E182cc spice
  10. Ecl82
  11. Zeiss Ikon Dominar L Amplifier
  12. Beginners attempt at SE 6EM7
  13. Subbing a 5751 with a 5755
  14. Sophia Electric 300B tube
  15. Screen drive and other P-P experiments
  16. Amplifier using a 833A
  17. Circuit help
  18. How much mis-match can an OT take?
  19. SE load mismatch, 8 or 6 or 4 ohms?
  20. Magnavox 196-BA => RH 84 conversion
  21. 40W class A push pull amp with JJ 2A3-40w possible?
  22. "Designing tube preamplifier" article
  23. Valve Tester Guru Help
  24. 6GB5 and Variants as Screen Driven Amps
  25. Gyrator Question
  26. Suggestion Please - Curcuit Simulation & PCB Design Software
  27. Starting to understand.....
  28. Aureavox Arcana 81
  29. Impedance question
  30. spare transformer wires?
  31. Capacitors and maximum voltage ratings
  32. Do Sweep tubes Glow Blue?
  33. Any way to upgrade this circuit? (V. 40's phono amp.)
  34. About tube "matched pairs"
  35. Testing Gm without tube tester
  36. Best place to get Shuguang 300B tubes
  37. Old metal tubes
  38. 300B pushpull- A new schematic
  39. Drake transformer
  40. TL Audio VP-5051 Valve voice processor
  41. Vtl 750
  42. DC-coupling of tube stages
  43. ThermalTrak transistor application.
  44. weird old amp:need help
  45. Triode Electronics Mark III
  46. Scavenging a broken oscilloscope to turn it into a preamp ?
  47. Scott LK150 transformer
  48. Tube Amp / Pre-amp kit?
  49. anything that can go as a Rp.....
  50. Genelex gold lion el84 reissue - ARCING
  51. Bias Current Mythbuster?
  52. Exactness of feedback capacitors?
  53. 5608a
  54. You know that you are having a bad day when.......
  55. 1U5 amplifier design, Newbie
  56. 12AU7 Pre-amp Schematic Question
  57. Beam pentodes and suppressor-grid pentodes of same type
  58. Quick question about CT and FWB
  59. Frank's 6SN7 line stage / preamp with GlassWare PS-1?
  60. SimpleSE OP Hammond bigger than the 125ESE
  61. Speaker impedance linearisation
  62. Differential filter circuit: biasing problem
  63. Curves for 12AH7
  64. Schematic for Audio Note Japan Kassai
  65. Help with schematic understanding
  66. SEPP output transformer
  67. Fixed bias design question
  68. Strange bias circuit. WTF?
  69. 5687 preamp transformer
  70. Anyone know of a dual pentode suitable for a LTP.
  71. Output transformer current and power ratings
  72. Diodes to protect OT's..
  73. Speakers for tube amps
  74. Help on power supply
  75. Line output transformer question
  76. Screen Drive Push Pull ideas
  77. 12AT7/46 Direct Reactance Drive Amp
  78. Bridge rectifier vs Full wave rectifier
  79. Isolation Transformer Question
  80. Glow tubes as series regs ?
  81. Glow tube shunt reg stability
  82. Some interesting reading about Sweep tubes
  83. What is this?
  84. What's A "Timber bulb"?
  85. aikido/807PSE and local feedback
  86. Optoisolator compressor ideas
  87. Airgap for filament transformer ?
  88. Tube stereo for E 60 including TDA1541 cd player
  89. Theta Amp problem
  90. 12A_7 vs 6SN7EH vs EF86?
  91. Mixing two channels in the preamp or at the phase splitter?
  92. amp input cap for crossover
  93. Audio Transformer/Cathode Feedback Info
  94. Determining cathode resistor
  95. Tube Pin Schematic Question
  96. Best looking tube?
  97. Identifying Stancor Power transformers
  98. HT crowbar
  99. "Bevois Valley" in triode, what to do with the feedback?
  100. Purple Glow
  101. When to use a grid leak resistor?
  102. Mcintosh MA 2275
  103. Blowing output transformer
  104. Kenwood KW-44 hum
  105. Tube system for classical audio
  106. Novel method to reduce filament hum in SE Amp?
  107. Help with 6SN7 w/ CCS
  108. Fisher X-101-D
  109. best tube (not amp)
  110. ML4/ML6 British triode
  111. transformer rubbish
  112. Identifying output transformer leads
  113. Grounding Aikido and F4
  114. Determining ratings for unknown Power Transformers
  115. Tube heaven - or tube hell?
  116. Sub amp/speaker to compliment S5 electronics K 12 G tube amp
  117. Troubleshooting hum in 12b4 preamp.. finally almost done!!
  118. SE cathode bias question
  119. k-12G / K-12M with 4 Ohm speakers
  120. About united electron tube
  121. 6c33c-b & 6c33c-v
  122. would like a substitute for Sowter 3575-C
  123. My first tube project WIP
  124. Tube rectifiede +- supply...
  125. the buzzing from amplifiers
  126. MC prepre with submini tubes
  127. 12AU7 Preamp build
  128. Bias/ Plate dissipation question
  129. Has anyone screen driven an EL84?
  130. tube pre amp for phone stage
  131. 6080 se cathode follower
  132. Amplifier suggestions for EPA OPT please
  133. Which tube? How much power can it produce?
  134. Graaf GM20 mods - help!
  135. xpp amplifier question
  136. 520v in PP UL...?
  137. New ST-70 blowing 3 amp slow blow fuse
  138. Was There a Heathkit W-1M or WM?
  139. 8ohm speakers 4ohm tap
  140. Upgrading the Conrad Johnson Premier Fourteen preamp
  141. Noob's first build !!!!
  142. 6sf5gt ??
  143. Measuring technics practical, the allaround reference method?
  144. 2A3 or KT88 ?
  145. What to build with these tubes?
  146. line output transformer help
  147. 6L6GC Options and Flavors
  148. Chinese Buffer Amp, Useful?
  149. 6C33C SE Amp - Ideas on refinement?
  150. 6BM8 Equivalent
  151. Newbie wants to rebuild a Stromberg Carlson ASR-433
  152. RH84 questions
  153. VTL Manley 807 push pull ultra linear
  154. Seeking Pentode-Triode with a 12AX7 half...
  155. Modern tube amplifier designs?
  156. 6n6p transformer output impedance
  157. 814 triode curves
  158. Bias Question
  159. Building a variac
  160. Is my 300B tube dead?
  161. One channel quiet - any bright ideas?
  162. Saw them coming (stupid prices on ebay)
  163. EL36/6CM5 pp design critique
  164. Driving Raven R2 with tubes
  165. Does Anyone Know What This Is?
  166. Need help with tubes problem...
  167. 6V6GT push pull NFB resistor value
  168. Power cord for single ended triode
  169. Virtual chokes
  170. 12AU7 based preamp hums when output cable is touched!
  171. Possible Test equipment find.
  172. 6ak5-45
  173. Using coax for signal wiring?
  174. Chassis Plate Finish
  175. Schade84
  176. Fisher 800c selenium rectifier pictures
  177. Looking for tips on operating points for tubes in anode follower ...
  178. Transformer in the cathodes ??
  179. Fisher 800c static,crackle
  180. 19J6 replacement
  181. Newbie tube buffer kit
  182. Any recommendations for tube for vari-mu compressor?
  183. AMC CVT 3030 Bias Procedure
  184. Anyone used a edcor cxpp100-ms-5k OT
  185. Noisy gain boost
  186. Troubleshooting hum issues with batteries?
  187. Rectifying Heater Supply
  188. tube heater over voltage!please help...
  189. rca 829b bias ? Audioromy 828
  190. 10k winding, 100k pot
  191. What is the definition of a 'good tube'?
  192. 3-stage DC-coupled Ampl
  193. 1946 Philco Tube Receiver
  194. A New Source for James Transformers
  195. Edcor Site Down? Gone? anyone know anything?
  196. How to calculate DRD amps..
  197. PL-519 Tube - Tell me more please...
  198. Need ideas for amp with 2A3, One Electron UBT-3
  199. Favourites discrete brand for tube amp
  200. Pharmicia EPS500/400 Power supply - tube use
  201. Black Art Audio
  202. 12AX7/12BH7 Hammond Tube Preamp Project
  203. Dampen transformer endbells?
  204. Do I have DC on my AC line?
  205. GM-70 cathode feed SE amplifier
  206. Rogers cadet mk 2 newbie project experience required
  207. Mcintosh amps transformer rewinding, help needed please!
  208. Using an output tranny from a stereo for a single-ended amplifier ?
  209. 6336A Single Ended.
  210. UA 175 Urei 175
  211. Morgan Jones 5842 RIAA
  212. Question about current ratings of Hammond 300 series power transformers.
  213. Cathode Windings
  214. Phono stage for 12B4 amp [from previous thread]
  215. Looking for schematic of 26 WOT Preamp
  216. Transformer Lam Questions
  217. Schottky diode bias
  218. ACROSOUND direct-couple EL84 amplifier question
  219. RH807 CCS loaded
  220. Audio Note Kit 1 PSU question
  221. New kt88's or 6550
  222. Bias Supply resistors
  223. Incredible source for used transformers and parts!
  224. Reclaimed Hammond H100 PSU's
  225. Arc Vt-60 Cloned :-)
  226. First Time Pre Amp Build
  227. 845 - Progress so far
  228. Nube challange12AX7 to drive 6C4
  229. 7th harmonic distortion from PP pentodes depends on bias?
  230. West Output Transformers?
  231. Help me design my DAC/Line Preamp.
  232. Hybrid preamp tube problemHi,
  233. Building RH84 SE tube amp.
  234. Question - THD Measrement/Spectrum Analyzis
  235. What to do with TMC tube radio gear?
  236. Easy & Safe & Good sounding gainclone tube buffer
  237. Compactron (31AL10) Head-Scratcher
  238. What cable do you use from input socket to volume pot
  239. problem with 12AE6A buffer
  240. Parafeed dc blocking/coupling cap help
  241. Funky Looking 15DQ8s
  242. 12SN7 vs 7N7 bs 6SN7
  243. Correct Pins For EL84 Triode Strap
  244. Dimensions for anode cap sizes?
  245. Mains transformer help needed please
  246. Tone Stack Challenge
  247. Aikido 6SN7 input 5687 output
  248. FRANK"S 6SN7 preamp/linestage
  249. Pentode grid question...
  250. Hybrid fullwave rectifier

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