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  1. Tube Sockets
  2. Circuit Ideas for the 815 (martian tube)
  3. Old Tektronix unit, usefull?
  4. my transformer output has a center tap: what do I do with this?
  5. 6AV5GA amp?
  6. Phase splitter idea
  7. Lowering noise in small signal pentodes?
  8. Articles from the past
  9. Help for LTP/CCS plus cathode follower
  10. Conrad Johnson PV-5, my next project, some simple questions
  11. ALTEC 1566a (DiY...if)
  12. Friday Night Fun with a ST-70
  13. Aikido All-In-One Octal Heater Troubles
  14. transimpedance amplifier
  15. Jaehong Lee OTL
  16. What tube bases to support for a new tube curve tracer
  17. 6GE5 in driver service for class B P-P
  18. Replace Electrolytics?
  19. Can OT's couple?
  20. before i drill Simple SE Chassis Seperation of input and output
  21. gates m-3638 preamp
  22. Oversized caps (PS and coupling) in RH84: Problem?
  23. What makes a great concertina triode?
  24. Luxman SQ5A
  25. Spice model with grid current 12ax7
  26. converting a magnavox pp 6v6 in triode mode
  27. 6V6 filaments in series
  28. my loud valve preamp
  29. Tranformer for Chinese pre amp (6N11) ?
  30. 1 watt desk speaker
  31. PE06/40 replacement
  32. Salvaged console tube reciever
  33. EF86 swap for 6BQ5 reverb?
  34. Yaqin CD3 Impressions and Internals
  35. svetlana 6D22S heater issues/question
  36. Unity-Gain EL84 Push-Pull Power Buffer
  37. Tube rectifier input capacitance
  38. Borbely hybrid Tube-MOSFET opamp
  39. Help! Tube Rolling
  40. Articles on Global Feedback
  41. Symetrical out low Zout
  42. Any Rimlock PCB sockets out there?
  43. 12SN7 Round Plate Tung Sol--is there such a thing?
  44. Vintage 2a3 tube amp
  45. Balance in CCS Long Tailed Pairs
  46. Audioromy 813 Mains Transformer
  47. Hello all, Im new from Spain, sorry for my english, and problems with my music angel
  48. use 120V x 2 for Aikido octal transformer?
  49. P-P O/P Trafo with only 2 tubes insead of 4?
  50. Eico HF-87 refurb
  51. Which SS CCS for the plate load on a 6N1P?
  52. Um, Can I do this?
  53. Eico power supply trouble (hlp plz)
  54. TV live regulator to tube preamp
  55. How to Spec Headphone output transformers
  56. Can I enlarge the mounting hole on Mosfet?
  57. Meng Yue 6P1
  58. Finding triode curves
  59. Critique my schematic 12ay7 linestage
  60. Suppresor Grid used for Feedback?
  61. Power Cascode
  62. Audio grade components
  63. Line Voltage with Yaqin MC-100B amp
  64. heater warmup and b+ delay
  65. BAL to UNBAL DAC buffer
  66. Counterpoint SA-7 - need a pic of the inside
  67. Are Chinese 6N2 the same as Russian 6N2P?
  68. New project; Musical Machine
  69. 4D32 SE amp, a few more questions
  70. Static shock with simple se
  71. Old electrolytic caps ok? MOSCODE 600
  72. Transformer Flux Band Tips and Tricks?
  73. What tube config will get this sound?
  74. On cleaning transformers
  75. My first project ELEKIT TU-870R
  76. DC7 MkII :New Schade 6080 amp.
  77. current driver tube amplifier
  78. A DC coupled headphones amp
  79. Ebay trader zhangsheng
  80. decware kits worth it?
  81. Simple test for transformer frequency response?
  82. Vacuum Tube Voltmeters
  83. Power Trans. Load Test
  84. Replacing Cap Across Filter Cap
  85. Regulate HV preamp with floating LM317?
  86. Rogers cadet 3
  87. Output impedance tap considerations.....
  88. Amp switch safety load
  89. MF X-10D replica problem
  90. Nice triode
  91. Low gain preamplifier
  92. Improving a Maple Tree Audio PS 2 power supply
  93. Baby Huey-ish phono?
  94. New? Local Feedback Method
  95. PSUD Help Needed: What value do I enter for current?
  96. Question on WE310
  97. How do you calculate choke size in a power supply?
  98. tubecad and tubecad se
  99. 300B amp Power Supply
  100. Adjustable internal Resonance?
  101. B+ Voltage sag for AB1 PP
  102. Maplin
  103. Preamp with an integrated amp
  104. First "boot" in 15 years
  105. Inherited these tubes. Anything interesting?
  106. What application for this tube?
  107. tantalum cap
  108. do I need to upgrade my heater supply to add another tube?
  109. Anyone have curves for a 2C52?
  110. tube-amplifier-shaped-usb-speaker
  111. pre-amp tubes: matching and care
  112. How to self taught about building tube amplifiers
  113. Any pretty good/bad chinese amps?
  114. Couple idiot questions....
  115. Looking for the triode mode of Z759
  116. Couple idiot questions....
  117. push pull 45
  118. Video of hum noise when I switch on the reverb of my Twin Amp
  119. 6sj7 spice model
  120. Help finding parallel 45 SE schematic
  121. filling in the low end, 6bq5 12ax7 circuitry
  122. Dynaco Mark VI
  123. Looking for Sonic Frontiers SFS80 Schematic
  124. CCS or V.REG for OP anode
  125. Yarland FV 34CIII
  126. Looking for OPT steel covers
  127. Damper diodes, center tapped heater, B+
  128. Dynaco ST-35 Newbie cathodyne question
  129. Anyone have valve/tube libraries for express PCB or PCB123?
  130. Looking for the Ultimate Aikido.
  131. CCS loaded DHT cathode follower?
  132. Phono stage with LT1028 MC input
  133. New valve int flash over why ?
  134. Sweep tube suggestions
  135. Amp project output problem
  136. 12AX7,6BQ5 PP Amp Search.
  137. Dynaco MkIII preamp/linestage recommendations?
  138. Can someone please check my PCB layout for this preamp?
  139. Bottlehead Filament Choke FC-1 for Push-Pull?
  140. Home James! But first, which transformer?
  141. NAD preamp = 6BQ5 Frankenschteen
  142. Wintersweet highvividity driver circuit
  143. Looking for TT11(CV1501) triode mode curve
  144. Amp switching with 4093/4066. How to add indicator LEDs?
  145. Yaqin MC-10L Blown Fuse
  146. 2a3 amp, progress picture
  147. How do I implement an AZ1 rec tube???
  148. Profit margin on used tube amps
  149. 300B sockets (different question)
  150. tri-amping question (s)
  151. Unity coupled power stage
  152. Acquired A Bunch Of Tubes
  153. Understanding load lines
  154. what would happen if.........?
  155. Testing valves/tubes
  156. 300b socket
  157. Vertical vs. Horizontal does it matter?
  158. Layout thoughts hmm....
  159. ID request, is this a pre?
  160. Anyone got any info on the Tippatone 500 watt amps?
  161. SMPS for Filaments?
  162. Using 6n6pi Push and Pull
  163. Optimum Tube Temperature
  164. Chassis
  165. 5670
  166. will this spice works in real word?
  167. An amplifier for Burning Man
  168. 12AT7,12AU7 Ultra linear cascode
  169. El Cheapo Grande
  170. EL84 Unused pins safe to connect?
  171. 6BQ5/EL84 tube buffer questions
  172. How much power do I need?
  173. Tube buffer/preamp. Where to place voltage divider?
  174. Schematic wanted for VTL Preamp "Maximal"
  175. modified GEC 88-50
  176. Zenith 7B31 Help
  177. Do swingers always buzz when they swing?
  178. 6at6 tube? What can i use it for?
  179. Sovtek 6550WA?
  180. how to make a tube gyrator eq?
  181. Transformer needed or "solid state guy needs help from tube guys"
  182. Differential input, SET output
  183. FFT of PSUD2 output?
  184. Differential push-pull design question
  185. Any EF184 users?
  186. 30P1S - How to use them?
  187. st-70 as good as it gets?
  188. Subbing in a TVC - input load Q
  189. Chinese tubes, new ones or relabeled?
  190. 6AV6 => 12AX7 question
  191. 845 & 300b tubes
  192. Sourcing sockets and plugs for power supply umbilicals
  193. Sub mini history question ...
  194. 6DX8 Amp for Headphones and Low Volume Needs
  195. Surplus Voltage Solution
  196. Tube rolling in the Triode Electronics 6au6/12au7 driver board
  197. RCA mystery tube help
  198. Breadboarding/Prototyping - How to and Tips/Tricks
  199. Sub-Miniature Tubes - Low Voltage
  200. True direct-coupled PP amp
  201. "Radical" twist on an all DHT phonostage
  202. input tubes for 300b
  203. JE Labs simple 2a3 filiment tranny, 1 or 2?
  204. ebay Valve Preamps boards for 18 !
  205. Smoothing caps
  206. Spud issues - a little help, please
  207. GLY513 in PS of Simple SE / PP and OTL
  208. Has anyone here built something with this super triode?
  209. What is this part in old radio?
  210. Has anyone done anything with a 5977 sub-mini
  211. Driving EQ from kathode resistor
  212. Understanding CCS vs CVS
  213. Can you believe this!
  214. help with my humming valve amp
  215. Picking tubes for SimpleSE-ish amplifier
  216. 6gk5/ECC88 Phono any comments.
  217. Meng Yue X1 6P1 amp (NOT the mini)
  218. Basic HiFi Tube Amp Layout? Please?
  219. stupid switch question
  220. Max Current of James JS-6123HS Transformer
  221. How do you determine a driver stage?
  222. SUPER cheap nos tubes if you live in california.
  223. 8ohm resistor in series with 8ohm speakers for a 16ohm OT?
  224. a good tube tester?
  225. Can't get adjustable reg to work
  226. 9 volt tube preamp.
  227. DCD power amplifier: 2A3/d3a CCS coupled: new topology?
  228. Equivalent to IXCP10M45S?
  229. Looking for non-DRD 300B using D3a as driver
  230. Akai M8 rebuild/restore/will-this-work?
  231. space charge 12fx8 amp or preamp schematic?
  232. Help with setup to trace UL curves
  233. My KT88 Williamson Amp Build
  234. UV 203A any good for audio ?
  235. What gives with this square wave?
  236. bottlehead paramour PT
  237. DC filament supply without electrolytic(s)?
  238. Looking for R Core power trafo and choke
  239. PP tube amp for bi-amping : above 400 hz
  240. 6N6P question
  241. Integrated valve amplifier : to buy or to build
  242. Lookin for an ST-70-like project
  243. Formula for Zout of diff pair
  244. 6SL7 and Crossovers
  245. Meng Yue: EL34 or 6P1?
  246. Power Transformers and chokes
  247. nos amperex authentic? label doesn't rub off
  248. Software analysis using tube analog circuit Audio Note Kit 1
  249. Webster Amps,Racine Wis.
  250. Help figuring out resistor values

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