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  1. Anyone tried Plitron transformers?
  2. Summing channels;Why? JE EL34
  3. TAJ's Harman Kardon Citation V rebuild thread
  4. Screened/shielded cables in chassis
  5. Cascode question re shunt to lower tube
  6. LED biasing in preamp - cap in parallel required?
  7. Can you identify these tube amplifiers? 4x807 & mercury vapor rectifiers
  8. Amperex BB ECC82 - Real or Fake?
  9. Max screen grid voltages in datasheets
  10. Tube rectifiers
  11. VT-25/10Y tubes
  12. Does anyone have the schematic for Transcendant Sound Mini Beast?
  13. Schematic help please
  14. Faulty rectifier valve possibly damaged my amplifier - help
  15. 6J1 tube buffer circuit diagram
  16. Filament transformer question
  17. Grundig 9060 output transformer identifying
  18. 6J1 biasing inconsistencies with datasheet
  19. Separate transformer for heaters. How to reference this to ground?
  20. 300B alternatives
  21. Stereo to Mono transformer based 'hybrid/bridging mixer'
  22. LK-48 over voltage
  23. Aikido all in one
  24. Bitsa Amp project
  25. Search for thread/article about phono preamp design
  26. Fusing valve amps
  27. AIKIDO line stage
  28. Cossor 61SPT - any experience?
  29. 6BG6GA PP, -bias, Amp built but couple problems
  30. GE 6sn7 made in Italy
  31. First SE Amp Build
  32. HV soft start
  33. Setup Question (do I really need the gain from a preamp)
  34. Your opinions please
  35. design advise
  36. Interpolation Oscillator
  37. audio note oto
  38. A small resonant HV converter: Q-Conv
  39. Iv got a 100w OPT That needs a circuit
  40. Powerful tube amp / unmatched tubes in parallel
  41. Need help: I have 807s and the guts from a HK AA-100
  42. SE EL34 and speakers
  43. 6AK10 LTP with CCS question
  44. Is a heater voltage of 6.7 cause for concern?
  45. Tube guards/cage for Elekit TU-8200
  46. ming da mc 845 aa modification
  47. How good can this headphone amp/pre amp be?
  48. Zero Bias Solution?
  49. Cathode Degeneration with CCS plate load- My Mistake
  50. Pilot 240 with too much bass-- circuit modification needed?
  51. EL34 DIY "centre-tapped" tube ??
  52. Advice for Super Cheap & Simple 829b based amp from spare parts
  53. Infineon IPA50R140CP N-channel mosfet
  54. Borberly Op amp 4 Tube Mosfet hybrid
  55. Splitting Power Supply Choke Question
  56. Toroidal PT as OPT in big power application?
  57. Inrush limiter question
  58. Counterpoint AS-5.1 Tube Type Question
  59. OPT connections
  60. Help teach a CS guy to test a tube amp!
  61. Now THIS is an output transformer
  62. Gas rectifier vs vacuum rectifier
  63. What value for the bias resistor of a SE 6550?
  64. ELL80 tube-Ultralinear mode???
  65. Russian "6L6" ID
  66. Tube amp for a car lol
  67. S5 Electronics Upgrade
  68. Best Tube for SPUD Amp
  69. Zenith 7b31 EL84 Tube Amp Low Volume
  70. Heater cathode elevation
  71. 6K5GT & EL36 AMP
  72. Grid stopper by ECC83
  73. 6L6 Without Screen Drive?
  74. Fusion Postmodernism and tube amps ---- 6SN7 + 26 45
  75. Mullard V.T.52 Push-Pull Tube AMP.
  76. Amp for Magneplaner 1,6/R
  77. Car tube amp- looking for advice
  78. Direct replacement for 5Z3PA and 5Z3P Rectifier
  79. 83 Rectifier
  80. Ground noise and hum: why and how to maybe fix it
  81. How to measure SNR?
  82. Triode vs Pentode cathode followers
  83. Damaged tubes
  84. 2W on 8Ohm OTL amplifier?
  85. EC88 dirver PL84 push-pull,DIY with a picture tells a story.
  86. DC/DC from 12V to 240V@25mA example
  87. the small SE UL ECL 86 / EY 82
  88. 1934 RCA Radio
  89. Recommendations for wiring a Red LED as a pilot lamp
  90. Retensioning UX4 (300b) tube pin socket
  91. Looking for power transformer source - details inside
  92. High voltage delay circuit
  93. op-amp current source
  94. Conrad Johnson ART II Blow-up
  95. Help In Determining Amplifier's Output
  96. Unknown tube identification help?
  97. 6S45P HP-Amp help with tail CCS
  98. shuguang EL84 question
  99. Audioromy FU29 M828A High Pitch Squeal / Whine / Whistle
  100. Unknown ECC-83
  101. 6MN8 connected as one triode
  102. 7247 and 6GF7A in driver circuits
  103. I'm looking for a PPP with el34
  104. Output transformer measurements
  105. Volume control crackles on SET hooked to F4.
  106. EF80 push EL153, DIY with a picture tells a story.
  107. Audioromy M828A/829B FU29 Bias/Balance Help
  108. The zero bias valve
  109. KT61 testing
  110. SET Stereo Amplifier
  111. Klangfilm 408a Output Transformers
  112. Too Large Grid Resistor?
  113. Sound master # 34 tube amp
  114. Echolette M40 Cap job ... now everything sucks
  115. dual coil choke
  116. looking for ML6 tubes
  117. 220V Transformer question
  118. 6GK5 SRPP
  119. Unknown Amplifier - Anyone recognise it
  120. Help me ID a tube?
  121. Triode electronics difficulties
  122. Can anyone ID this car amp trans?
  123. Multi Stage amplifier bandwidth.
  124. Chassis Question
  125. Converting Stereo SE to Parallel SE Monoblock
  126. Just got a Hickok 539B! Have questions!
  127. Can regulated B+ act like a CCS?
  128. Quad II valve matching
  129. Heater Current - per valve or per triode ?
  130. OT for 12AU7 preamp?
  131. Which James output for a Lacewood SE
  132. Help Matching RCA 5692 Tubes
  133. Yet another ECL82 se
  134. Psvane 211-TII ... Pushing them above 75W Pa
  135. Fisher X 100 A restoration questions?
  136. Brook 12A Q
  137. HT voltage for preamp circuit vs output circuit
  138. Please explain this H3 3rd harmonic cancellation
  139. Recommended speaker selector for tube amplifiers?
  140. Should I use a choke?
  141. 12DW7/7427 tube question
  142. philips 228 radiogram
  143. soft start and delay start - help please
  144. Grounding and GFCI circuits
  145. SuperTriode with BJT and MosFet - a good idea?
  146. 6AQ5/6005 12AX7 Amp
  147. Hamlin's 20-20 / Trio w45 : looking for legible schematic
  148. Dynaco PAS 3X - help with an old modification
  149. Power supply 500v
  150. Anyone use 816 mercury vapor 1/2 wave rec tube
  151. Lamm clone
  152. Zobel RC network and stability of GNF SE amplifier
  153. Screen driven 6KD6 SE
  154. Comments about regulators
  155. Rolling 6C33
  156. Crazy B+ Issue???
  157. Psvane EL34PH replica - reliability?
  158. Help designing regulated power supply
  159. Tube wiring guide line
  160. Chassis earth and ground
  161. 7868 to 7591
  162. Maximum Screen Voltage for Triode Strapped 1625 or 837
  163. AT-50 British transmitting triode
  164. Problem with power tubes
  165. A 6Y6 Push Pull amplifier
  166. Testing
  167. 6CG7 Hybrid Tube Headphone Amp
  168. Choke On The Output Of A Tube Amp
  169. 6n3p buffer?
  170. 4P1L vs 4P1S
  171. Moving from 6N16B to 6021/CV3986 in Cayin HA-3
  172. "La Luxuriante" R120 SE amplifier
  173. Tube Headphone Amp Design and Help With Inverse Pre-Distortion Circuit
  174. Looking For Some Help
  175. Audio dummy load
  176. Custom-made transformers in USA
  177. Etude - Amplifier for study
  178. Can you mix glow tubes and zeners for shunt regs?
  179. tubes4hifi - Amplifier Sound, other kits?
  180. Suggest source for inexpensive chassis for tube amp project?
  181. Reverse Tube Regulator?
  182. Leak Stereo 20 Problem
  183. Choke for 6v6 lacewood amp.
  184. Output Tube Options for Scott 399
  185. ST-35 Z565 Output Transformer Troubles?
  186. Point to Point Wiring Tube Preamp
  187. Siamese RG-6
  188. Gz34 rectifier with dc heater
  189. line preamp
  190. A bit of help with my phono preamp
  191. Aikido Cascode Preamp build
  192. Can EL34 replace KT88?
  193. Current Draw of CJ ART??
  194. Square wave overshot=worm sound?
  195. Band pass filter for tube amps
  196. Screen drive and the 6AG9
  197. Cleaning odd potentiometer
  198. Removing a Jolida 502 Balance Control
  199. "The unequal twins" ECC83 / ECC99 Triode and 6N1P / E280F pentode amps
  200. Marantz 8 blowing fuse
  201. A newbie question about 12AX7 tube
  202. Web resources
  203. Transformer Shrouding - Purpose/Effectiveness
  204. current source
  205. KT88 Schematic - please help
  206. 105C to 85C Capacitors in Cheap Chinese Preamp
  207. Need help with plate CCS in 6EM7
  208. Need help on replacing Cap on Marantz 8
  209. Transformer for 12ax7 B+ calculation
  210. First amp build, advice and thoughts encouraged!!
  211. Proposed E-Linear PP 6L6GB w/ EL83 LTP - Critique?
  212. Luxman CL36, schematic
  213. Help with input impedance
  214. phono sp16
  215. Looking for a 20W amp schematics
  216. Ruggedized tube construction?
  217. Quicksilver full function preamplifier
  218. Another variants of using PCB from Ebay
  219. Valves very close each other...
  220. HF valve amp?
  221. Eico ST70 construction manual...
  222. Audio Research $30 FET!
  223. value in humour
  224. "rejuvenate" oxide cathode
  225. el84 se amp layout
  226. the grand return. 3d21A triode PP
  227. How did receiving valve manufacture compare to the LHC ...
  228. Classi RIAA preamp questions
  229. Max input voltage with negative feedback in place?
  230. Is there a 9-pin mini equivalent of 6AU6?
  231. Which DHT tube, mu>30 driver duty
  232. LTP and H3 distortion
  233. Schematics for Bendix 6384
  234. Has anybody compared distortion profiles of their amp designs?
  235. Dynacord transformer sparks flying
  236. Why this exists?
  237. Help with strange valve project:)
  238. help with these transformers please
  239. Bias a heater supply with humdinger?
  240. Question About Isolating Grounds
  241. How close is close enough for setting bias?
  242. Vitamin Q or Auricaps for coupling...any opinions?
  243. High current from EL84 measured on tubetester
  244. Power supply design for my preamp
  245. How do I get USB input into a tube amp?
  246. Janus Shunt Regulator / Aikido Octal build
  247. 6SN7 or 12AU7 Tube preamp for Gainclone
  248. E-Linear, P-P pentode application
  249. 6n6p preamp. Does it look ok?
  250. www.grippeaz.com

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