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

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

Content Relevant URLs by vBSEO 3.3.2