PDA

View Full Version : Tubes / Valves


Pages : 1 2 3 4 5 6 [7] 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104

  1. 6922 or 12AX7
  2. nobsound amp
  3. New project: pre and power mono, what to build?
  4. Radford bias: options for ultralinear output
  5. Class D Amplifier -- building blocks
  6. HT windings with no CT
  7. Dynaco st 70 resistor
  8. Older Conrad Johnson or new something else
  9. Power supply dummy load
  10. Micro-power, micro cost amp with Rod-Tubes, 1P24B-V
  11. A bit of fun with archaic converters
  12. DOUK 5670+6AQ5+6E2 push-pull merge Class AB tube amp HIFI amplifier DIY KIT
  13. Counterpoint SA-5.1 with dead channel
  14. need safety advise - speaker output ternimals
  15. Marantz 8B Replica Build
  16. Why Gold Grids
  17. "Shiny Eyes" PSE 300B
  18. PCB layout for Valves
  19. rogers cadet mkiii
  20. Direct-Coupled Tube (or Tube-MOSFET) Headphone Amp Circuit
  21. My GM70 amp...separating the input+driver from the output stage
  22. My Quad II and 22 restoration
  23. Help with an OTL CV3618 amp design
  24. stancore NOS power transformer Picture
  25. Choosing a tube amplifier to build, HELP needed
  26. FB circuit for a Maggie 175 with Edcor UL OT's
  27. Gary Lays it on the Line (Classic Output XFMRs)
  28. Info needed on adding subwoofer to tune amp
  29. Help me understand this 7189A SE tube amp?
  30. uTracer Users: Could you trace Western Electric 436A, 448A tubes ?
  31. Tube amp project for 4 ohm speakers
  32. Wouldn't equal plate V + screen V = triode mode?
  33. 866A, 3B25 LTSPICE models
  34. 6HB6 as finals
  35. Leak OP Transformer Mod - Assistance please
  36. strange noise from tube line amp
  37. 6a6 tube as power output in headphone amp
  38. Mullard 6-7 stereo valve amp rebuild
  39. tube regulator for B+
  40. Yet another HV regulator
  41. Opinions on Clamping a ring-of-two bias-block in cathode of EL84
  42. Odd stabilized HV power EF86 + EL84
  43. NL710, 6011
  44. Somebody can identify this tube?
  45. Bullet proof driver circuit
  46. Need Grounding Advice for my System
  47. Use the chassis as the heatsink - Need safety advise
  48. Kofi's Tetra Sans
  49. Spice Simulation of NFB Amp with embedded PF
  50. Simplicity or complexity?
  51. 6N16B Aikido
  52. How to test a power supply
  53. Buying tubes in Bulgaria
  54. Input Trafo MFG reviews needed
  55. A cautinary tale.
  56. HELP! Hybrid Rectifier PSU with 2 Diodes und 2 TV-Dampers 6CG3
  57. ecc99-2a3:opinion
  58. Step By Step Journal Of My TubeLab SSE build
  59. Triode troubles
  60. Safe PSU capacitor values for old Dyna amp?
  61. KT88, 6550 SE Triode Strapped Performance.
  62. Dynaco A431 OPTs
  63. Gingertube's 'bias-block' EL84 Heatsunk MJE340?
  64. SST-70 w/KT-150's mono's build
  65. Error Correction?
  66. Tube amp issue
  67. 4x6N3 preamp board from ebay
  68. time delayed LED for heater
  69. Aikido PSU decisions
  70. coupling caps for RCA rebuild
  71. Recommended coax
  72. Adding solid state bass to valves
  73. Incompatibility between Aikido Pre and Tubelab SimpleSE
  74. What power amp design would suit Esoteric MG-20?
  75. PL36 (triode) SE
  76. Any thoughts on this?
  77. BAT VK 55 paralleled
  78. Looking for a good phono preamp schematic.
  79. Nice diy from Poland
  80. Unballancer humming in one channel
  81. 6S19P tubes instead of 7233 tubes.?
  82. Looking for good stereo amp <$350 - help
  83. Question on EL84 SE triode with CCS at cathode
  84. Convert choke loaded 12b4 to CCS and retain od3's
  85. What can I make with these?
  86. 12AT7 LTP Calling Eli Duttman
  87. Book Help, Please?
  88. Amplifier class A EL34
  89. ps audio hybrid tube buffer
  90. FS: Copper chassis, OPT and Power Xfmrs
  91. Negative Feedback Amplifier with embedded Positive Feedback Booster
  92. Looking for a single ended amp.
  93. EF39 as 300B driver...
  94. How is Electro Harmonix 6922 sonicly compared to NOS?
  95. Tube amp driving a Subwoofer
  96. Leak Stereo 20 Power Supply Choke?
  97. help me read circuit: broski 300b shunt reg
  98. CCS current regulators for OP valves
  99. 1930's push pull field coil amplifier
  100. Loudness and power and volts
  101. Opinions; big mess or have potential?
  102. Star grounding
  103. High NFB OTL headphone amp
  104. Any technical advantages of almost floating grounds?
  105. Output transformer
  106. 12AU7 Tube Line Pre-amp on Ebay
  107. Would you run these at say 1200vdc?
  108. MOSFET equivalent
  109. 6BY5 GA full wave rectifier replacement
  110. ID those parts - trafo
  111. Sweeps in class A
  112. Preamp valve rectified power supply
  113. Grommes Precision S-35 - Worth playing with?
  114. 6922 or E88CC in the Rode NTK Mic
  115. What the hell caused this?
  116. 6SN7 Aikido White Follower - Spice simulation
  117. Need to build a moving coil stage
  118. You guys and gals recognize any of this equipment?
  119. Help with first amp design, SET no feedback hp amp
  120. LTSPICE problems with 10Y model
  121. 5876 tube
  122. P2P wiring and cable types
  123. Claus Byrith 4-30: missing valve in the PCB?
  124. KR T1610 PP amp building
  125. Pls Help me Identify these Tubes!
  126. measuring output transformer primary impedance
  127. Unusual output transformer Triad
  128. Input transformer differences
  129. Faint buzz through power stage (845)
  130. Pros and Cons of 3rd Stage in SE (6AV5/2A3 drive requirements)
  131. Star grounding - wooden box
  132. R601P Tube Radio
  133. analog metric el34 se amp
  134. EL34 PP amplifier suggestions
  135. 6AU6 Triode Mode
  136. Another GM70
  137. newbie amp question.
  138. Push-Pull Plate Choke from Edcor?
  139. Finalizing 300B Amps==Please Comment
  140. Help!!!
  141. Controlling gain in VA stage
  142. 833 Push Pull Design
  143. restoring mullard valve paint
  144. Mentmore TVA1
  145. DIY in Korea?
  146. Case suggestions for Pye Black Box?
  147. help trouble shooting a problem
  148. Liteaudio 1s37 Phono preamp
  149. All DHT tube amp dream
  150. Suggestion for valve amp kit
  151. Why are directly heated rectifiers still popular?
  152. Headphone amp with pre out
  153. wish to buy 10's or other tungsten DHT's
  154. Audio Innovations Series 300 II -red plate
  155. 811 heater power supply...
  156. Bijou schematics question (PINs)
  157. Looking for a proficient tube tech in New England.
  158. hybrid amplifier using EF86
  159. Looking in San Diego....
  160. Ground of tube headphone amp
  161. Input Transformer Question
  162. Low imp tube headphone diy amp
  163. Cathode Follower as DAC Output Stage?
  164. Monoblock Gu-50 help.
  165. Aikido CF question
  166. Tube Power Amp Kit Recommendations
  167. EL34,KT66,6L6GC,KT77:who works better with high impedance OT load in SE Triode Mode?
  168. ECC40 Voltage Question
  169. Question re DC coupling vs RC coupling (AC)
  170. Measuring ripple in filament supply (coleman reg)
  171. What about use largest possible capacitor as interstage decoupling ( 1 or 2uf)
  172. replace 6N3 tube preamp with mullard E555L
  173. Preamp to Poweramp tube proximity/spacing?
  174. List of Tube Noise Measurements - please nominate lowest noise tubes
  175. Just for interest
  176. Time to build the big one.
  177. Opinion? Would the input/driver from a HK-5 be good to replace original Mk3 ft. end??
  178. Has anyone built this kit?
  179. mu-follower with output transformer?
  180. ECC81 double triode tubes flashed brightly when switched on.
  181. pre amp with tone controll
  182. Making own hifi tube amp from scratch!!
  183. Pentode CCS as a load for long tailed pair?
  184. E88CC & 6N23P plate voltage range?
  185. First pre phono design [newbie]
  186. Struggling with LTspice - How to use .inc to get a tube to appear
  187. Eico St 40
  188. ECC88 Input/driverstage for F4 amp
  189. Tube headphone amp
  190. Acquired free brand new Jolida 302a
  191. Help with restoration of Audio Research equipment
  192. Grommes 103gt tuner
  193. Frank’s 6SN7 pre & regulated supply
  194. Sleeping giant
  195. hum by mounting powertransformer and tubes on same chassis
  196. Rectifier tube overheating
  197. "World's Best Technical Master Craftsmen"
  198. OPT for 2A3
  199. getting rid of pre amp in a tube amp
  200. A question on OPT and no loads.
  201. Auto-Bias vs Manual bias vs EFB
  202. Russian receiving tubes and foreign equivalents
  203. B+ delay timer module
  204. Testing DIY triodes
  205. Adding a dummy load to prevent amp from being damaged by having no load?
  206. 30 watt class A chopper controlled bias with 6 EL84
  207. Input resistor (What are purposes?)
  208. Posted new 300B push-pull amp design
  209. Help me source a pair of OPT for Knight KG-240 tube amp
  210. Help Pick Transformers for EICO HF-87
  211. PreAmp
  212. Original price of the Conrad Johnson PV-5
  213. balance pots in Williamson driver stage
  214. Another Question on Tektronix Transformers
  215. Philco K1629 Upgrade Options
  216. My return to tubes, via headphones - what circuit would you recommend?
  217. High Quality EL84 UL SE Amplifier
  218. regulated supply to CCS plate load
  219. Twin Audio Sinfonia Preamp
  220. ecll800 schematic confusion
  221. 6L6 recommendations
  222. tube 100th
  223. Luxman OY15-5k OPT?
  224. Has anyone had experience with Russian 5C8S and 5C9S?
  225. New Here looking for info on rare SVIKO russian made 6KG6 monoblocks
  226. EL 84 pp amp - simple regulated circuit sought
  227. Any tube amp to drive B&W 802D?
  228. New to valve amplifiers
  229. SE 6GW8 output transformer with 5 wires.
  230. Mr.Curwen's single ended adventures
  231. Tube magic eye with em84-sensitivity?!
  232. Tube test
  233. Brimar 6V6 USSR
  234. World Design KT88 Kit
  235. Opinions appreciated: Lafayette LA 224b vs. McIntosh 225
  236. Clone X10D problems distortion / saturation ... help!
  237. 12DW7 or 12AU7+12AX7 if stereo?
  238. First preamp and gain control
  239. Tube life..
  240. Berman 76 preamplifier, I need some advice please
  241. Old Tube amp missing tubes. HELP
  242. Going to Berlin, looking for electronics diy shops
  243. 6SJ7 Vs 6Ж8 - Can the russian tube be considered an equivalent tube ?
  244. 6L6G Tung-Sol reissue: sweet sound and delicious night sight, but...
  245. Help with Eico ST70
  246. Class-D and Tube buffer/preamp off same 12V SLA?
  247. Gu50 or 1624 PP amp first trials
  248. cathode follower driver A2
  249. High Pass Filter for OTL headphone Amp
  250. Bewitch 6550 Balance Issue

Content Relevant URLs by vBSEO 3.3.2