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  1. Weird EL84 PP behavior
  2. 300B SE Design
  3. Tube/Valve Shop in BERLIN
  4. Aikido buffer/gain selector?
  5. Gaijin friendly audio shop in Tokyo area?
  6. Troubleshooting channel dropout
  7. "groundbus" is this right?
  8. About New Production Tubes
  9. suche JJ E88CC oder 6922 Sovtek in Berlin
  10. 8ohm output transformer with a 4ohm load
  11. Power transformer - good for anything?
  12. Beginner question, swap .047uf for .05uf?
  13. Tetra phono stage
  14. Japanese OPTs
  15. Changing secondary voltage (Uncivilized way)
  16. 4EH7 opinions anyone?
  17. Silvertone 45A tubes....rare variant
  18. single 12AT7 in a tubelab simple se
  19. Finished the "big one"!
  20. CV428 or 5B254M useful?
  21. How about making your own tubes?!
  22. entry level int-amp?
  23. What Cap Is This?
  24. help please with kt-88 ultralinear o/p transformer
  25. A flea thingy that sounds good
  26. Mullard vs. Williamson 60W UL PP amp. Which one?
  27. Need help with PSUD II model
  28. 5v to 2.5v for 2a3 filament
  29. Does 2A3 require a grid stopper?
  30. Hammond ECL86/6GW8 conversion
  31. Connecting two opt's to act as one.
  32. Usefullness of tubes
  33. twisted/isolated/shielded wires?
  34. Feedback question
  35. What tubes for a tube amp?
  36. SE-OPTs
  37. Phase splitting using directly heated tubes?
  38. Change EL84 from Triode to Ultra linear
  39. DC hybrid folded-cascode for Schade
  40. New UK Manufacturer of Valves
  41. Can any here explain the JHS designation?
  42. Too good to be true???
  43. Judging a tube's condition
  44. EF86 tube preamp
  45. Any tips for snap in type caps to replace solder lug cans?
  46. 6EM7 SET Headamp
  47. Are these ALL really EL34 subs?
  48. parallel tubes
  49. Changing the frequency of AC from mains to lower, out of audible range???
  50. Se 6550
  51. New Suppo Audio EL34 amp
  52. 60Watt+ valve design wanted
  53. Interesting tube on e-bay for trans atlantic cable
  54. Need help solving problem on new 2A3 build
  55. Tube and Passive Preamps-Auto Transformers for Attenuators/Volume Control - Overview
  56. Peavey Classic 30 - Squeal
  57. Where bay M6 lamination (M4,M2) metal for transformer
  58. dynamic pentode screen draw
  59. Tube Sockets
  60. Circuit Ideas for the 815 (martian tube)
  61. Old Tektronix unit, usefull?
  62. my transformer output has a center tap: what do I do with this?
  63. 6AV5GA amp?
  64. Phase splitter idea
  65. Lowering noise in small signal pentodes?
  66. Articles from the past
  67. tube upgrade for vintage orange 120
  68. Help for LTP/CCS plus cathode follower
  69. Conrad Johnson PV-5, my next project, some simple questions
  70. ALTEC 1566a (DiY...if)
  71. Friday Night Fun with a ST-70
  72. Aikido All-In-One Octal Heater Troubles
  73. Guitar tube amp OT Calculation/Winding HELP!
  74. transimpedance amplifier
  75. Jaehong Lee OTL
  76. What tube bases to support for a new tube curve tracer
  77. 6GE5 in driver service for class B P-P
  78. Replace Electrolytics?
  79. Can OT's couple?
  80. tube solid state hybrid guitar amp, looking for schematic
  81. before i drill Simple SE Chassis Seperation of input and output
  82. gates m-3638 preamp
  83. Oversized caps (PS and coupling) in RH84: Problem?
  84. What makes a great concertina triode?
  85. Luxman SQ5A
  86. Spice model with grid current 12ax7
  87. converting a magnavox pp 6v6 in triode mode
  88. 3-leaded russian PIO caps
  89. 6V6 filaments in series
  90. my loud valve preamp
  91. Tranformer for Chinese pre amp (6N11) ?
  92. 1 watt desk speaker
  93. PE06/40 replacement
  94. Salvaged console tube reciever
  95. EF86 swap for 6BQ5 reverb?
  96. Yaqin CD3 Impressions and Internals
  97. svetlana 6D22S heater issues/question
  98. Unity-Gain EL84 Push-Pull Power Buffer
  99. Tube rectifier input capacitance
  100. Borbely hybrid Tube-MOSFET opamp
  101. Help! Tube Rolling
  102. Articles on Global Feedback
  103. Symetrical out low Zout
  104. Any Rimlock PCB sockets out there?
  105. 12SN7 Round Plate Tung Sol--is there such a thing?
  106. Vintage 2a3 tube amp
  107. Balance in CCS Long Tailed Pairs
  108. Audioromy 813 Mains Transformer
  109. Hello all, I´m new from Spain, sorry for my english, and problems with my music angel
  110. use 120V x 2 for Aikido octal transformer?
  111. P-P O/P Trafo with only 2 tubes insead of 4?
  112. Eico HF-87 refurb
  113. Which SS CCS for the plate load on a 6N1P?
  114. Um, Can I do this?
  115. Eico power supply trouble (hlp plz)
  116. TV live regulator to tube preamp
  117. How to Spec Headphone output transformers
  118. Can I enlarge the mounting hole on Mosfet?
  119. Meng Yue 6P1
  120. Finding triode curves
  121. Critique my schematic 12ay7 linestage
  122. Suppresor Grid used for Feedback?
  123. Power Cascode
  124. Audio grade components
  125. Line Voltage with Yaqin MC-100B amp
  126. heater warmup and b+ delay
  127. BAL to UNBAL DAC buffer
  128. Counterpoint SA-7 - need a pic of the inside
  129. Are Chinese 6N2 the same as Russian 6N2P?
  130. New project; Musical Machine
  131. 4D32 SE amp, a few more questions
  132. Static shock with simple se
  133. Old electrolytic caps ok? MOSCODE 600
  134. Transformer Flux Band Tips and Tricks?
  135. What tube config will get this sound?
  136. On cleaning transformers
  137. My first project ELEKIT TU-870R
  138. DC7 MkII :New Schade 6080 amp.
  139. current driver tube amplifier
  140. A DC coupled headphones amp
  141. Ebay trader zhangsheng
  142. decware kits worth it?
  143. Simple test for transformer frequency response?
  144. Modular guitar tube amp power supply - interface concerns
  145. Vacuum Tube Voltmeters
  146. Power Trans. Load Test
  147. Replacing Cap Across Filter Cap
  148. Regulate HV preamp with floating LM317?
  149. Rogers cadet 3
  150. AC15 Heritage Project w/ Sound Clips
  151. Output impedance tap considerations.....
  152. Amp switch safety load
  153. MF X-10D replica problem
  154. Nice triode
  155. Low gain preamplifier
  156. Improving a Maple Tree Audio PS 2 power supply
  157. Baby Huey-ish phono?
  158. New? Local Feedback Method
  159. PSUD Help Needed: What value do I enter for current?
  160. Question on WE310
  161. How do you calculate choke size in a power supply?
  162. tubecad and tubecad se
  163. 300B amp Power Supply
  164. Adjustable internal Resonance?
  165. B+ Voltage sag for AB1 PP
  166. Maplin
  167. Preamp with an integrated amp
  168. First "boot" in 15 years
  169. Inherited these tubes. Anything interesting?
  170. What application for this tube?
  171. tantalum cap
  172. do I need to upgrade my heater supply to add another tube?
  173. Anyone have curves for a 2C52?
  174. tube-amplifier-shaped-usb-speaker
  175. pre-amp tubes: matching and care
  176. How to self taught about building tube amplifiers
  177. Any pretty good/bad chinese amps?
  178. Couple idiot questions....
  179. Looking for the triode mode of Z759
  180. Couple idiot questions....
  181. push pull 45
  182. Video of hum noise when I switch on the reverb of my Twin Amp
  183. 6sj7 spice model
  184. Help finding parallel 45 SE schematic
  185. filling in the low end, 6bq5 12ax7 circuitry
  186. Dynaco Mark VI
  187. Looking for Sonic Frontiers SFS80 Schematic
  188. CCS or V.REG for OP anode
  189. Yarland FV 34CIII
  190. Looking for OPT steel covers
  191. Damper diodes, center tapped heater, B+
  192. Dynaco ST-35 Newbie cathodyne question
  193. Anyone have valve/tube libraries for express PCB or PCB123?
  194. Looking for the Ultimate Aikido.
  195. CCS loaded DHT cathode follower?
  196. Phono stage with LT1028 MC input
  197. New valve int flash over why ?
  198. Sweep tube suggestions
  199. Amp project output problem
  200. 12AX7,6BQ5 PP Amp Search.
  201. Dynaco MkIII preamp/linestage recommendations?
  202. Can someone please check my PCB layout for this preamp?
  203. looking for easy, low cost guitar amp project
  204. UK EBAY - 100W Marshall / Fender Clone Transformer Set
  205. 1KW power - what do you think?
  206. Bottlehead Filament Choke FC-1 for Push-Pull?
  207. Home James! But first, which transformer?
  208. NAD preamp = 6BQ5 Frankenschteen
  209. Wintersweet highvividity driver circuit
  210. Looking for TT11(CV1501) triode mode curve
  211. Amp switching with 4093/4066. How to add indicator LEDs?
  212. Yaqin MC-10L Blown Fuse
  213. 2a3 amp, progress picture
  214. How do I implement an AZ1 rec tube???
  215. Profit margin on used tube amps
  216. 300B sockets (different question)
  217. How can I modify this grommes little jewel amp for guitar.
  218. tri-amping question (s)
  219. Unity coupled power stage
  220. Acquired A Bunch Of Tubes
  221. Understanding load lines
  222. what would happen if.........?
  223. Testing valves/tubes
  224. 300b socket
  225. Vertical vs. Horizontal – does it matter?
  226. Layout thoughts hmm....
  227. ID request, is this a pre?
  228. Anyone got any info on the Tippatone 500 watt amps?
  229. SMPS for Filaments?
  230. Using 6n6pi Push and Pull
  231. Optimum Tube Temperature
  232. Chassis
  233. 5670
  234. will this spice works in real word?
  235. An amplifier for Burning Man
  236. 12AT7,12AU7 Ultra linear cascode
  237. El Cheapo Grande
  238. EL84 Unused pins safe to connect?
  239. 6BQ5/EL84 tube buffer questions
  240. How much power do I need?
  241. Tube buffer/preamp. Where to place voltage divider?
  242. Schematic wanted for VTL Preamp "Maximal"
  243. modified GEC 88-50
  244. Zenith 7B31 Help
  245. Do swingers always buzz when they swing?
  246. 6at6 tube? What can i use it for?
  247. Sovtek 6550WA?
  248. how to make a tube gyrator eq?
  249. Transformer needed or "solid state guy needs help from tube guys"
  250. Differential input, SET output