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  1. About New Production Tubes
  2. suche JJ E88CC oder 6922 Sovtek in Berlin
  3. 8ohm output transformer with a 4ohm load
  4. Power transformer - good for anything?
  5. Beginner question, swap .047uf for .05uf?
  6. Tetra phono stage
  7. Japanese OPTs
  8. Changing secondary voltage (Uncivilized way)
  9. 4EH7 opinions anyone?
  10. Silvertone 45A tubes....rare variant
  11. single 12AT7 in a tubelab simple se
  12. Finished the "big one"!
  13. CV428 or 5B254M useful?
  14. How about making your own tubes?!
  15. entry level int-amp?
  16. What Cap Is This?
  17. help please with kt-88 ultralinear o/p transformer
  18. A flea thingy that sounds good
  19. Mullard vs. Williamson 60W UL PP amp. Which one?
  20. Need help with PSUD II model
  21. 5v to 2.5v for 2a3 filament
  22. Does 2A3 require a grid stopper?
  23. Hammond ECL86/6GW8 conversion
  24. Connecting two opt's to act as one.
  25. Usefullness of tubes
  26. twisted/isolated/shielded wires?
  27. Feedback question
  28. What tubes for a tube amp?
  29. SE-OPTs
  30. Phase splitting using directly heated tubes?
  31. Change EL84 from Triode to Ultra linear
  32. DC hybrid folded-cascode for Schade
  33. New UK Manufacturer of Valves
  34. Can any here explain the JHS designation?
  35. Too good to be true???
  36. Judging a tube's condition
  37. EF86 tube preamp
  38. Any tips for snap in type caps to replace solder lug cans?
  39. 6EM7 SET Headamp
  40. Are these ALL really EL34 subs?
  41. parallel tubes
  42. Changing the frequency of AC from mains to lower, out of audible range???
  43. Se 6550
  44. New Suppo Audio EL34 amp
  45. 60Watt+ valve design wanted
  46. Interesting tube on e-bay for trans atlantic cable
  47. Need help solving problem on new 2A3 build
  48. Tube and Passive Preamps-Auto Transformers for Attenuators/Volume Control - Overview
  49. Peavey Classic 30 - Squeal
  50. Where bay M6 lamination (M4,M2) metal for transformer
  51. dynamic pentode screen draw
  52. Tube Sockets
  53. Circuit Ideas for the 815 (martian tube)
  54. Old Tektronix unit, usefull?
  55. my transformer output has a center tap: what do I do with this?
  56. 6AV5GA amp?
  57. Phase splitter idea
  58. Lowering noise in small signal pentodes?
  59. Articles from the past
  60. tube upgrade for vintage orange 120
  61. Help for LTP/CCS plus cathode follower
  62. Conrad Johnson PV-5, my next project, some simple questions
  63. ALTEC 1566a (DiY...if)
  64. Friday Night Fun with a ST-70
  65. Aikido All-In-One Octal Heater Troubles
  66. Guitar tube amp OT Calculation/Winding HELP!
  67. transimpedance amplifier
  68. Jaehong Lee OTL
  69. What tube bases to support for a new tube curve tracer
  70. 6GE5 in driver service for class B P-P
  71. Replace Electrolytics?
  72. Can OT's couple?
  73. tube solid state hybrid guitar amp, looking for schematic
  74. before i drill Simple SE Chassis Seperation of input and output
  75. gates m-3638 preamp
  76. Oversized caps (PS and coupling) in RH84: Problem?
  77. What makes a great concertina triode?
  78. Luxman SQ5A
  79. Spice model with grid current 12ax7
  80. converting a magnavox pp 6v6 in triode mode
  81. 3-leaded russian PIO caps
  82. 6V6 filaments in series
  83. my loud valve preamp
  84. Tranformer for Chinese pre amp (6N11) ?
  85. 1 watt desk speaker
  86. PE06/40 replacement
  87. Salvaged console tube reciever
  88. EF86 swap for 6BQ5 reverb?
  89. Yaqin CD3 Impressions and Internals
  90. svetlana 6D22S heater issues/question
  91. Unity-Gain EL84 Push-Pull Power Buffer
  92. Tube rectifier input capacitance
  93. Borbely hybrid Tube-MOSFET opamp
  94. Help! Tube Rolling
  95. Articles on Global Feedback
  96. Symetrical out low Zout
  97. Any Rimlock PCB sockets out there?
  98. 12SN7 Round Plate Tung Sol--is there such a thing?
  99. Vintage 2a3 tube amp
  100. Balance in CCS Long Tailed Pairs
  101. Audioromy 813 Mains Transformer
  102. Hello all, Im new from Spain, sorry for my english, and problems with my music angel
  103. use 120V x 2 for Aikido octal transformer?
  104. P-P O/P Trafo with only 2 tubes insead of 4?
  105. Eico HF-87 refurb
  106. Which SS CCS for the plate load on a 6N1P?
  107. Um, Can I do this?
  108. Eico power supply trouble (hlp plz)
  109. TV live regulator to tube preamp
  110. How to Spec Headphone output transformers
  111. Can I enlarge the mounting hole on Mosfet?
  112. Meng Yue 6P1
  113. Finding triode curves
  114. Critique my schematic 12ay7 linestage
  115. Suppresor Grid used for Feedback?
  116. Power Cascode
  117. Audio grade components
  118. Line Voltage with Yaqin MC-100B amp
  119. heater warmup and b+ delay
  120. BAL to UNBAL DAC buffer
  121. Counterpoint SA-7 - need a pic of the inside
  122. Are Chinese 6N2 the same as Russian 6N2P?
  123. New project; Musical Machine
  124. 4D32 SE amp, a few more questions
  125. Static shock with simple se
  126. Old electrolytic caps ok? MOSCODE 600
  127. Transformer Flux Band Tips and Tricks?
  128. What tube config will get this sound?
  129. On cleaning transformers
  130. My first project ELEKIT TU-870R
  131. DC7 MkII :New Schade 6080 amp.
  132. current driver tube amplifier
  133. A DC coupled headphones amp
  134. Ebay trader zhangsheng
  135. decware kits worth it?
  136. Simple test for transformer frequency response?
  137. Modular guitar tube amp power supply - interface concerns
  138. Vacuum Tube Voltmeters
  139. Power Trans. Load Test
  140. Replacing Cap Across Filter Cap
  141. Regulate HV preamp with floating LM317?
  142. Rogers cadet 3
  143. AC15 Heritage Project w/ Sound Clips
  144. Output impedance tap considerations.....
  145. Amp switch safety load
  146. MF X-10D replica problem
  147. Nice triode
  148. Low gain preamplifier
  149. Improving a Maple Tree Audio PS 2 power supply
  150. Baby Huey-ish phono?
  151. New? Local Feedback Method
  152. PSUD Help Needed: What value do I enter for current?
  153. Question on WE310
  154. How do you calculate choke size in a power supply?
  155. tubecad and tubecad se
  156. 300B amp Power Supply
  157. Adjustable internal Resonance?
  158. B+ Voltage sag for AB1 PP
  159. Maplin
  160. Preamp with an integrated amp
  161. First "boot" in 15 years
  162. Inherited these tubes. Anything interesting?
  163. What application for this tube?
  164. tantalum cap
  165. do I need to upgrade my heater supply to add another tube?
  166. Anyone have curves for a 2C52?
  167. tube-amplifier-shaped-usb-speaker
  168. pre-amp tubes: matching and care
  169. How to self taught about building tube amplifiers
  170. Any pretty good/bad chinese amps?
  171. Couple idiot questions....
  172. Looking for the triode mode of Z759
  173. Couple idiot questions....
  174. push pull 45
  175. Video of hum noise when I switch on the reverb of my Twin Amp
  176. 6sj7 spice model
  177. Help finding parallel 45 SE schematic
  178. filling in the low end, 6bq5 12ax7 circuitry
  179. Dynaco Mark VI
  180. Looking for Sonic Frontiers SFS80 Schematic
  181. CCS or V.REG for OP anode
  182. Yarland FV 34CIII
  183. Looking for OPT steel covers
  184. Damper diodes, center tapped heater, B+
  185. Dynaco ST-35 Newbie cathodyne question
  186. Anyone have valve/tube libraries for express PCB or PCB123?
  187. Looking for the Ultimate Aikido.
  188. CCS loaded DHT cathode follower?
  189. Phono stage with LT1028 MC input
  190. New valve int flash over why ?
  191. Sweep tube suggestions
  192. Amp project output problem
  193. 12AX7,6BQ5 PP Amp Search.
  194. Dynaco MkIII preamp/linestage recommendations?
  195. Can someone please check my PCB layout for this preamp?
  196. looking for easy, low cost guitar amp project
  197. UK EBAY - 100W Marshall / Fender Clone Transformer Set
  198. 1KW power - what do you think?
  199. Bottlehead Filament Choke FC-1 for Push-Pull?
  200. Home James! But first, which transformer?
  201. NAD preamp = 6BQ5 Frankenschteen
  202. Wintersweet highvividity driver circuit
  203. Looking for TT11(CV1501) triode mode curve
  204. Amp switching with 4093/4066. How to add indicator LEDs?
  205. Yaqin MC-10L Blown Fuse
  206. 2a3 amp, progress picture
  207. How do I implement an AZ1 rec tube???
  208. Profit margin on used tube amps
  209. 300B sockets (different question)
  210. How can I modify this grommes little jewel amp for guitar.
  211. tri-amping question (s)
  212. Unity coupled power stage
  213. Acquired A Bunch Of Tubes
  214. Understanding load lines
  215. what would happen if.........?
  216. Testing valves/tubes
  217. 300b socket
  218. Vertical vs. Horizontal does it matter?
  219. Layout thoughts hmm....
  220. ID request, is this a pre?
  221. Anyone got any info on the Tippatone 500 watt amps?
  222. SMPS for Filaments?
  223. Using 6n6pi Push and Pull
  224. Optimum Tube Temperature
  225. Chassis
  226. 5670
  227. will this spice works in real word?
  228. An amplifier for Burning Man
  229. 12AT7,12AU7 Ultra linear cascode
  230. El Cheapo Grande
  231. EL84 Unused pins safe to connect?
  232. 6BQ5/EL84 tube buffer questions
  233. How much power do I need?
  234. Tube buffer/preamp. Where to place voltage divider?
  235. Schematic wanted for VTL Preamp "Maximal"
  236. modified GEC 88-50
  237. Zenith 7B31 Help
  238. Do swingers always buzz when they swing?
  239. 6at6 tube? What can i use it for?
  240. Sovtek 6550WA?
  241. how to make a tube gyrator eq?
  242. Transformer needed or "solid state guy needs help from tube guys"
  243. Differential input, SET output
  244. FFT of PSUD2 output?
  245. Differential push-pull design question
  246. Any EF184 users?
  247. 30P1S - How to use them?
  248. st-70 as good as it gets?
  249. Subbing in a TVC - input load Q
  250. Chinese tubes, new ones or relabeled?

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