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  1. Replacing Cap Across Filter Cap
  2. Regulate HV preamp with floating LM317?
  3. Rogers cadet 3
  4. AC15 Heritage Project w/ Sound Clips
  5. Output impedance tap considerations.....
  6. Amp switch safety load
  7. MF X-10D replica problem
  8. Nice triode
  9. Low gain preamplifier
  10. Improving a Maple Tree Audio PS 2 power supply
  11. Baby Huey-ish phono?
  12. New? Local Feedback Method
  13. PSUD Help Needed: What value do I enter for current?
  14. Question on WE310
  15. How do you calculate choke size in a power supply?
  16. tubecad and tubecad se
  17. 300B amp Power Supply
  18. Adjustable internal Resonance?
  19. B+ Voltage sag for AB1 PP
  20. Maplin
  21. Preamp with an integrated amp
  22. First "boot" in 15 years
  23. Inherited these tubes. Anything interesting?
  24. What application for this tube?
  25. tantalum cap
  26. do I need to upgrade my heater supply to add another tube?
  27. Anyone have curves for a 2C52?
  28. tube-amplifier-shaped-usb-speaker
  29. pre-amp tubes: matching and care
  30. How to self taught about building tube amplifiers
  31. Any pretty good/bad chinese amps?
  32. Couple idiot questions....
  33. Looking for the triode mode of Z759
  34. Couple idiot questions....
  35. push pull 45
  36. Video of hum noise when I switch on the reverb of my Twin Amp
  37. 6sj7 spice model
  38. Help finding parallel 45 SE schematic
  39. filling in the low end, 6bq5 12ax7 circuitry
  40. Dynaco Mark VI
  41. Looking for Sonic Frontiers SFS80 Schematic
  42. CCS or V.REG for OP anode
  43. Yarland FV 34CIII
  44. Looking for OPT steel covers
  45. Damper diodes, center tapped heater, B+
  46. Dynaco ST-35 Newbie cathodyne question
  47. Anyone have valve/tube libraries for express PCB or PCB123?
  48. Looking for the Ultimate Aikido.
  49. CCS loaded DHT cathode follower?
  50. Phono stage with LT1028 MC input
  51. New valve int flash over why ?
  52. Sweep tube suggestions
  53. Amp project output problem
  54. 12AX7,6BQ5 PP Amp Search.
  55. Dynaco MkIII preamp/linestage recommendations?
  56. Can someone please check my PCB layout for this preamp?
  57. looking for easy, low cost guitar amp project
  58. UK EBAY - 100W Marshall / Fender Clone Transformer Set
  59. 1KW power - what do you think?
  60. Bottlehead Filament Choke FC-1 for Push-Pull?
  61. Home James! But first, which transformer?
  62. NAD preamp = 6BQ5 Frankenschteen
  63. Wintersweet highvividity driver circuit
  64. Looking for TT11(CV1501) triode mode curve
  65. Amp switching with 4093/4066. How to add indicator LEDs?
  66. Yaqin MC-10L Blown Fuse
  67. 2a3 amp, progress picture
  68. How do I implement an AZ1 rec tube???
  69. Profit margin on used tube amps
  70. 300B sockets (different question)
  71. How can I modify this grommes little jewel amp for guitar.
  72. tri-amping question (s)
  73. Unity coupled power stage
  74. Acquired A Bunch Of Tubes
  75. Understanding load lines
  76. what would happen if.........?
  77. Testing valves/tubes
  78. 300b socket
  79. Vertical vs. Horizontal does it matter?
  80. Layout thoughts hmm....
  81. ID request, is this a pre?
  82. Anyone got any info on the Tippatone 500 watt amps?
  83. SMPS for Filaments?
  84. Using 6n6pi Push and Pull
  85. Optimum Tube Temperature
  86. Chassis
  87. 5670
  88. will this spice works in real word?
  89. An amplifier for Burning Man
  90. 12AT7,12AU7 Ultra linear cascode
  91. El Cheapo Grande
  92. EL84 Unused pins safe to connect?
  93. 6BQ5/EL84 tube buffer questions
  94. How much power do I need?
  95. Tube buffer/preamp. Where to place voltage divider?
  96. Schematic wanted for VTL Preamp "Maximal"
  97. modified GEC 88-50
  98. Zenith 7B31 Help
  99. Do swingers always buzz when they swing?
  100. 6at6 tube? What can i use it for?
  101. Sovtek 6550WA?
  102. how to make a tube gyrator eq?
  103. Transformer needed or "solid state guy needs help from tube guys"
  104. Differential input, SET output
  105. FFT of PSUD2 output?
  106. Differential push-pull design question
  107. Any EF184 users?
  108. 30P1S - How to use them?
  109. st-70 as good as it gets?
  110. Subbing in a TVC - input load Q
  111. Chinese tubes, new ones or relabeled?
  112. 6AV6 => 12AX7 question
  113. crate vintage club 50 2x12 keeps blowing preamp tubes
  114. 845 & 300b tubes
  115. Sourcing sockets and plugs for power supply umbilicals
  116. Sub mini history question ...
  117. 6DX8 Amp for Headphones and Low Volume Needs
  118. Surplus Voltage Solution
  119. Tube rolling in the Triode Electronics 6au6/12au7 driver board
  120. RCA mystery tube help
  121. Breadboarding/Prototyping - How to and Tips/Tricks
  122. Sub-Miniature Tubes - Low Voltage
  123. True direct-coupled PP amp
  124. "Radical" twist on an all DHT phonostage
  125. input tubes for 300b
  126. JE Labs simple 2a3 filiment tranny, 1 or 2?
  127. ebay Valve Preamps boards for 18 !
  128. Smoothing caps
  129. Spud issues - a little help, please
  130. GLY513 in PS of Simple SE / PP and OTL
  131. Has anyone here built something with this super triode?
  132. What is this part in old radio?
  133. Has anyone done anything with a 5977 sub-mini
  134. Driving EQ from kathode resistor
  135. Understanding CCS vs CVS
  136. Can you believe this!
  137. help with my humming valve amp
  138. Picking tubes for SimpleSE-ish amplifier
  139. 6gk5/ECC88 Phono any comments.
  140. Meng Yue X1 6P1 amp (NOT the mini)
  141. Basic HiFi Tube Amp Layout? Please?
  142. stupid switch question
  143. Max Current of James JS-6123HS Transformer
  144. How do you determine a driver stage?
  145. SUPER cheap nos tubes if you live in california.
  146. 8ohm resistor in series with 8ohm speakers for a 16ohm OT?
  147. a good tube tester?
  148. Can't get adjustable reg to work
  149. 9 volt tube preamp.
  150. DCD power amplifier: 2A3/d3a CCS coupled: new topology?
  151. Equivalent to IXCP10M45S?
  152. Looking for non-DRD 300B using D3a as driver
  153. Akai M8 rebuild/restore/will-this-work?
  154. space charge 12fx8 amp or preamp schematic?
  155. Help with setup to trace UL curves
  156. My KT88 Williamson Amp Build
  157. UV 203A any good for audio ?
  158. What gives with this square wave?
  159. bottlehead paramour PT
  160. DC filament supply without electrolytic(s)?
  161. Looking for R Core power trafo and choke
  162. PP tube amp for bi-amping : above 400 hz
  163. 6N6P question
  164. Integrated valve amplifier : to buy or to build
  165. Lookin for an ST-70-like project
  166. Formula for Zout of diff pair
  167. 6SL7 and Crossovers
  168. Meng Yue: EL34 or 6P1?
  169. Power Transformers and chokes
  170. nos amperex authentic? label doesn't rub off
  171. Software analysis using tube analog circuit Audio Note Kit 1
  172. Webster Amps,Racine Wis.
  173. Help figuring out resistor values
  174. Small (Novel) Tube Rectifiers?
  175. Conrad Johnson ART preamp question.
  176. pd510
  177. i want to build 3D21WB tube PP amp
  178. How to choose an optimal load line for a cathode follwer buffer?
  179. removing sound controlls...
  180. Pentode cathode follower output impedance
  181. Telematic KC401
  182. ebay, 7c kit, worth it?
  183. Mullard 5-10 for guitar use?
  184. Questions: YAQIN MC-100B KT88 together with Spawn Sachiko?
  185. Olson AM-158
  186. Check out my KT88 curves
  187. Just another /\|OOB to Tubes....Need Schem Help
  188. Problem with 832A PP amp
  189. Marantz 8b power transformer
  190. New SET Project
  191. Magnavox Model #OFMC26 Tube Stereo
  192. Balancing Servo
  193. Akai M8 Modding Service Required
  194. 12AX7 basics, some questions on wiring
  195. Hickok Model 600A
  196. Valve for Marshall AVT275 amp
  197. Tube Shield
  198. Choosing an output transformer
  199. Lost in Translation - DIY Japan
  200. Ebay KT88
  201. Filament voltages - an idle curiosity
  202. Project caused by need
  203. PSU issues, advice needed.
  204. Tubelab SE Driver Bias Help
  205. Question about cathode voltage
  206. NOS/NIB tubes what does it mean?
  207. Help to identify transformers
  208. Guitar amp schematic for PPP EL84
  209. DIY tube amp power supply
  210. Socket Saver
  211. Need some tube help!
  212. Need Help Biasing TRV-M300SE Amps
  213. Will this supply work?
  214. First foray into SET, design for your comment
  215. Help understanding a few Ohm's law calculations
  216. Hum in left channer - rogers cadet 3
  217. Need help on understanding AudioResearch like output stage
  218. Help finding 2A3 integrated 2 stage design
  219. 75 / 2A6 Spice Model?
  220. Vacuum Tube DAC
  221. Need help wiring CT transformer
  222. What is this component in my tube amp?
  223. What type of amp should I make with this? Schematic help also needed
  224. 6418 tube preamplifier - Oatley Electronics
  225. Black out coused demage in tube output stage
  226. Need help adding a master volume, and some troubleshooting ...
  227. Other uses for your 807's
  228. Ballantyne output Iron
  229. Power Trafo & Choke headroom
  230. Bare R Cores and bobbins, where???
  231. Plate chokes
  232. Has anyone done anything with the 6112 tube?
  233. el84 amp advice
  234. About to be scammed - bigtime
  235. Dynaco PAS3 -- New Cap board installed
  236. Throw it on the heap... SSE
  237. Loose Tube Bases
  238. 12E1 Triode PP, Any Suggestion?
  239. dac output stage with 5687 pp
  240. Help needed with my Epi Valve Jr
  241. Baby Tube Subwoofer Amp help wanted
  242. 12BH7 and the Simple SE?
  243. "The Bursar" Push-Pull Amplifier
  244. Needed - Advice on tubelab Simple SE build
  245. Oil filled caps - how are they made? DIY caps?
  246. EL34 schematic question
  247. Newb B9A question
  248. 6889 in the Simple SE - misc observations
  249. Recommend me a KT88/6550 + 7N7 (6SN7) Schematic!
  250. 01A tube amp Schematic???

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