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 99 100 101 102 103 104 105

  1. Tubelab simple SE ideas
  2. Newcomb E-10B Amplifer
  3. Telefunken RV218 power triode
  4. Crowhurst High Power vs Low Power Amplifiers
  5. Duncan amps PSU designer II help
  6. damper diodes
  7. EL12N in JCM800 clone
  8. Amp design exercise, mentorship needed...
  9. Need help with series filament 25l6GT amp
  10. Dynakit Mark IV Oscillation
  11. Telefunken C3M data
  12. Can a tube guru help with nu>lambda conversions?
  13. plate dissipation vs brand
  14. Solid-state replacements for PAS2/3 rectifiers?
  15. first integrated amp
  16. Problems with Unbalanced to Balanced line matching transformer from EDCOR
  17. st70A mod.kit
  18. Grampian 600u
  19. Suggest amp to drive mangnapan SMGa/MMG
  20. Valve DI box
  21. Yaqin Tube Amplifier
  22. Jensen JT-11P-1 on tube amp input
  23. Amperex PQ 6922 code decifering?
  24. 12ax7 driving a DHT out, why not?
  25. unknown Rogers Pre Power
  26. Mic pre question
  27. power tube power scaler
  28. Tube Rectifier with transformer without Center tap
  29. Can I use this stuff (does it have any value?)
  30. Full regulated power supply for 12au7(preamp)
  31. 6C33 OTL Circlotron
  32. Ammeter connection for Tubelab SE
  33. Unknown output transformer
  34. Building a tube pre/amp copy (6V6)
  35. 6922 pin i.d.
  36. KT88 Push Pull Amp using transistor driver stage
  37. 45 DHT HT Supply oscillating - help!
  38. exceeding plate voltage of the output tube
  39. Fisher 101D
  40. Tubes and Eagle3D
  41. Looking for old amp info
  42. Restoring an old tube amp
  43. Noob Tube Preamp Finished Kit Transformer HOT!
  44. the tv underrated tubes
  45. Headphone Amp
  46. What is needed to drive 86db speakers and sound *good*?
  47. ef86 - plate voltage
  48. Output signal distortion
  49. Minimum Acceptable Gm
  50. Anyone have experience with the 6SD7GT tube ?
  51. Identifying an ultralinear OPT
  52. A good sounding EL34 PP sch please
  53. THE CHAMP CBA-20807 1000 Watt Valve amplifier
  54. ST-35 First Build
  55. Identifying EL34 tube?
  56. Solid state relais in stean of standby swtich
  57. $75 tube amp kit on eBay???
  58. Power supply RC (ohm's law) question -NEWBIE ALERT
  59. variable power control
  60. reccommend a voltage doubler for bias?
  61. Point to Point build tips
  62. I need some fairly specific capacitors types, like polyester or silva mica.
  63. ecf82 pentode instead of ef86
  64. K-12G vs. K-502
  65. eq in a tiny Directly Heated Cathode amp
  66. Anyone ever try 6C33C SE with Aikido drive?
  67. Help with 1:2 line level input Tx's
  68. 112a preamp need comment please
  69. Excellent (Modified) Williamson Treatise
  70. Vintage Hoffman Stereo Amp Problem - fump, fump, fump
  71. Chicago BO-14 100w amp
  72. ef861 - guitar preamp
  73. volume pot question, help.
  74. Simple B+ delay circuit for tube power amp?
  75. Dynacord Super 61, 62 spares request
  76. My small tube does it work?
  77. Approaching the best primary impedance on low or high side?
  78. CT Trafo and floating psu for circlotron?
  79. Unknown tube, need help to identify!
  80. 6L6 guidance needed
  81. Output Power Question
  82. Can the 7AK7 computer tube work as audio output tube ?
  83. Burned in Power Tubes?
  84. Driver Match for K-12G TubeAmp
  85. KT90 to KT88 with autobias
  86. SRPP DC working condition for Rk1=2Rk2
  87. NOS Russian Reflektor 6P6S (6V6) tubes were a pleasant surprise
  88. the 'sound' of a CF
  89. Hickok I-177B tester help!
  90. Illinois Capacitor or Cornell_Dubilier
  91. Found iron recycling - what possible uses?
  92. Class AB PP - is it any good ?
  93. Stereo to mono by paralleling outputs?
  94. BOX in the making
  95. How about paralleling output tubes
  96. Are they basically Borbely hybrid circuitry?
  97. Service Life at Low Plate Current
  98. Sophia Electric SE Transformers for 813 "Super Schade"
  99. 10W suitcase amp
  100. PP OT made of 2 transformers
  101. If I change B+ do I have to change the circuit?
  102. PhonoDude
  103. Lafayette Phono/Reverb /Center channel amp
  104. Seller recommendation needed.
  105. Jeffrey's Super Circlotron (hybrid)
  106. Request for obscure heater specs
  107. Jolida JD1501RC Service Manual / Schematic
  108. 80W amp with a pair of EL34
  109. Epiphone Valve Junior to HiFi Conversion
  110. Serious Distortion on my DIY Toccata Phono Preamp
  111. Hickok 539b switch settings for 6SL7
  112. help me designing parallel SE guitar amp with 12at7 as power tube
  113. Voltage Change9115v/230v) of Audio Research amplifiers
  114. HF oscillation with no load, but only on one channel.
  115. Tube innards
  116. Peavey valveking 112 lead (distortion) channel doesn't work
  117. Looking for a tube amp
  118. What happens If I use too weak output transformer?
  119. Chinese amp: 2A3 6SN7 6SJ7 5Z5P push pull
  120. 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
  121. Single Ended EL84 B+
  122. Looking for some PSU advice ...
  123. Electronic transformer filament supply
  124. Which Salas HV shunt regulator should I choose?
  125. Traced an old valve with no specs - thoughts please
  126. Resistor socket?
  127. Dynaco PAS 3X PSU mod
  128. Best sounding 500v. electrolytics
  129. CCS's for CCD line amp?
  130. tube life
  131. For tube amps w/ high output Z - Parallel R cross spkr?
  132. High and low impedance output preamps
  133. LTspice and simulating tube circuits?
  134. Cheap & Well Made Chinese SE EL34 Amp
  135. Heathkit transformer replacement...
  136. Integrated amp will not turn on
  137. EL34, Claus Byrith amplifier, mains noise problem
  138. Need a proposal for a stereo amp
  139. 12AT7 Headphone amp
  140. 6l6/12ax7 schematics please
  141. Hybrid bridge with jfet OS
  142. Please allow me to introduce myselft
  143. Chassis Source
  144. Is my 6L6 amp damaged from EL34's
  145. VISHAY VTA 55 Bulk Metal Foil Resistors?
  146. High-Voltage Power for 6 stage pedal
  147. 10 megaohms??
  148. E180F V EF184
  149. help on gain calculation with transformer for SE tube
  150. Working with constant current charts
  151. Hum and noise in small amp
  152. My project (6c33SET)
  153. EZ260A Grommes 260A Project
  154. 18A5 sound fine in triode mode ?
  155. 6GF5 sound fine in triode mode ?
  156. Muddy 6V6 Power Amp?
  157. GM 70 Schematic needed!
  158. tube simulatie models.
  159. building vacuum tubes... some questons
  160. Hot Rodded Dynaco ST-35 - Dynakit Parts Kit
  161. Fixed bias on small signal pentode
  162. Buffer preamplifier
  163. 7027a testing
  164. decade bank values for a plate current tester
  165. anyone know the dimensions of a dynakit st-70 pcb?
  166. Help on designing full DHT SET power amplifier
  167. dc coupled volume pot value
  168. 20W OTL with 6N5P, Opinions...
  169. Finding parts
  170. Tube's JLH hybrid solution
  171. Curtis Mathes Console / TV receiver
  172. Marantz 8b feedback circuit
  173. Noisy volume pot with some tubes but not others
  174. Found an Eico HF-86 for sale, is it worth it?
  175. Paco T-60 Tube Tester
  176. Aikido all in one heater issue
  177. Need a little help with Chinese tube Preamp
  178. Choke Loaded Const. Current Draw Amp
  179. 6550 SINGLE-ENDED AMPLIFIER
  180. Balancing pp driver stage
  181. P-P 6C33
  182. Need help with Cornet 2
  183. Sweet folly: a tube SMPS
  184. More articles for the Wireless World Archive
  185. Recommendations for a valve amp kit
  186. 2 watt amplifier
  187. 1AX7
  188. 2 x 6as7 -> u=?
  189. Help with transformer
  190. Building a mu-follower stage
  191. ecl11 - ecl86 replacement
  192. Please comment on this grounding scheme.
  193. A tube-preamp with DSP-DAC-Touchscreen-and Music Streaming...
  194. Microphone modification help
  195. Microphone modification help
  196. First time hearing an SET
  197. Rattle can a power transformer
  198. Need better RIAA circuit for my phono amp.
  199. Input volume pot wiring
  200. Constant current heating undervoltage
  201. Some tube info that I hope is helpful
  202. Toroidal output transormers
  203. cathode bypass on opt secondary
  204. Push Pull Powersupply Test Question?
  205. Recommandation please..
  206. My new humble thread
  207. KT88 single stage pp - cascode diff amp
  208. foot switch safety question
  209. Which KT88 Brand to Buy?Sso many to choose
  210. 12ax7 perfect bias point
  211. preamplifier/driver for 807
  212. Help with Quad II hum
  213. 18K audio note output transformer
  214. Small tube amp conversion help 6x4, 6AU6, 6AQ5
  215. Hybrid never see
  216. "Next to Last" PAS Project
  217. Power supply overload
  218. Home build 6L6 pp amp buzzing noise
  219. 807 monoblocks with big PSU
  220. SET amps and crossovers.....?
  221. Sockets for 6P41S
  222. 6dj8 phono amp
  223. Jolida Score!!!!
  224. voltage boost
  225. Swinging choke value in PSUD
  226. Hum Nirvana
  227. Plates glowing on my Fender Concert after blowing fuse
  228. This weekend's reading
  229. 6550-6550A-6550B-6550C - What are exactly Differences ??
  230. Interstage Transformer Questions
  231. Vacuum State FVP5A voltages
  232. can you help me out? Sencore TC114 tube tester
  233. Steve Bench's tube crossover - Help needed.
  234. transformer design equations
  235. Retrofit idea, need advice, 6L6SE guitar amp
  236. some misc schematics, manley, rotel
  237. What happened to my tube??
  238. Tube Preamp Question
  239. Schematic for Pilot SP215
  240. Screen current through cathode resistors
  241. Gyrator design
  242. Any tips for routing heaters on a PCB
  243. 6EZ5 as drop in replacement for 6V6 tube?
  244. RIAA Preamp and equalization 12AX7
  245. Correct hum mods?
  246. Push-Pull from Stereo SE amp
  247. how to select transformers.
  248. Ultrapath or parallel feed apps. for 7591 amps?
  249. PP-UL amp with KT88
  250. Reuse these sockets and tube choice question

Content Relevant URLs by vBSEO 3.3.2