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  1. ampex 354? some questions
  2. Good power Filter Capacitors
  3. Fisher 101d blow fuse
  4. Jolida 502A lost output...?
  5. Codename "Tapyrus", my ongoing DIY headphone amp
  6. RIAA preamp with DHTs
  7. Dynaco Mark VI feedback values
  8. Eagle PCB
  9. Ode to Tube Rollers
  10. switching tubes: good or bad idea?
  11. COnn Organ Amp DI266 Info 12v6GT tubes
  12. Please help me figure out why my plate voltage is too high here
  13. Yaqin MC10L Question for the Guru's
  14. PP PSU: How much ripple is too much ripple?
  15. Bypass caps in choke PS
  16. Grounded Grid TRANSCENDENT line stage
  17. Battery Powered Tube Amp
  18. 5Z4PJ 6N2J
  19. Almost there! opinions are welcomed(6C33SET)
  20. Speaker impedance and amp matching?
  21. r core or toroidal output trafo for dynaco st70
  22. Heathkit Returns
  23. How to get started
  24. WANTED: schematic for Eico 2050 Classic Series
  25. winding an output transformer
  26. 12AX7 vacuum tube pre-amp?
  27. motor 'defeat' switch for echoplex/etc
  28. Audionote kit L4 and L6
  29. class a audio amplifier 5w with ic ne5532
  30. Fate of my Heathkit W7-M amplifiers
  31. Trying to get my B&K 500 up and running.
  32. Tubelab simple SE ideas
  33. Newcomb E-10B Amplifer
  34. Telefunken RV218 power triode
  35. Crowhurst High Power vs Low Power Amplifiers
  36. Duncan amps PSU designer II help
  37. damper diodes
  38. EL12N in JCM800 clone
  39. Amp design exercise, mentorship needed...
  40. Need help with series filament 25l6GT amp
  41. Dynakit Mark IV Oscillation
  42. Telefunken C3M data
  43. Can a tube guru help with nu>lambda conversions?
  44. plate dissipation vs brand
  45. Solid-state replacements for PAS2/3 rectifiers?
  46. first integrated amp
  47. Problems with Unbalanced to Balanced line matching transformer from EDCOR
  48. st70A mod.kit
  49. Grampian 600u
  50. Suggest amp to drive mangnapan SMGa/MMG
  51. Valve DI box
  52. Yaqin Tube Amplifier
  53. Jensen JT-11P-1 on tube amp input
  54. Amperex PQ 6922 code decifering?
  55. 12ax7 driving a DHT out, why not?
  56. unknown Rogers Pre Power
  57. Mic pre question
  58. power tube power scaler
  59. Tube Rectifier with transformer without Center tap
  60. Can I use this stuff (does it have any value?)
  61. Full regulated power supply for 12au7(preamp)
  62. 6C33 OTL Circlotron
  63. Ammeter connection for Tubelab SE
  64. Unknown output transformer
  65. Building a tube pre/amp copy (6V6)
  66. 6922 pin i.d.
  67. KT88 Push Pull Amp using transistor driver stage
  68. 45 DHT HT Supply oscillating - help!
  69. exceeding plate voltage of the output tube
  70. Fisher 101D
  71. Tubes and Eagle3D
  72. Looking for old amp info
  73. Restoring an old tube amp
  74. Noob Tube Preamp Finished Kit Transformer HOT!
  75. the tv underrated tubes
  76. Headphone Amp
  77. What is needed to drive 86db speakers and sound *good*?
  78. ef86 - plate voltage
  79. Output signal distortion
  80. Minimum Acceptable Gm
  81. Anyone have experience with the 6SD7GT tube ?
  82. Identifying an ultralinear OPT
  83. A good sounding EL34 PP sch please
  84. THE CHAMP CBA-20807 1000 Watt Valve amplifier
  85. ST-35 First Build
  86. Identifying EL34 tube?
  87. Solid state relais in stean of standby swtich
  88. $75 tube amp kit on eBay???
  89. Power supply RC (ohm's law) question -NEWBIE ALERT
  90. variable power control
  91. reccommend a voltage doubler for bias?
  92. Point to Point build tips
  93. I need some fairly specific capacitors types, like polyester or silva mica.
  94. ecf82 pentode instead of ef86
  95. K-12G vs. K-502
  96. eq in a tiny Directly Heated Cathode amp
  97. Anyone ever try 6C33C SE with Aikido drive?
  98. Help with 1:2 line level input Tx's
  99. 112a preamp need comment please
  100. Excellent (Modified) Williamson Treatise
  101. Vintage Hoffman Stereo Amp Problem - fump, fump, fump
  102. Chicago BO-14 100w amp
  103. volume pot question, help.
  104. Simple B+ delay circuit for tube power amp?
  105. Dynacord Super 61, 62 spares request
  106. My small tube does it work?
  107. Approaching the best primary impedance on low or high side?
  108. CT Trafo and floating psu for circlotron?
  109. Unknown tube, need help to identify!
  110. 6L6 guidance needed
  111. Output Power Question
  112. Can the 7AK7 computer tube work as audio output tube ?
  113. Burned in Power Tubes?
  114. Driver Match for K-12G TubeAmp
  115. KT90 to KT88 with autobias
  116. SRPP DC working condition for Rk1=2Rk2
  117. NOS Russian Reflektor 6P6S (6V6) tubes were a pleasant surprise
  118. the 'sound' of a CF
  119. Hickok I-177B tester help!
  120. Found iron recycling - what possible uses?
  121. Class AB PP - is it any good ?
  122. Stereo to mono by paralleling outputs?
  123. BOX in the making
  124. How about paralleling output tubes
  125. Are they basically Borbely hybrid circuitry?
  126. Service Life at Low Plate Current
  127. Sophia Electric SE Transformers for 813 "Super Schade"
  128. 10W suitcase amp
  129. PP OT made of 2 transformers
  130. If I change B+ do I have to change the circuit?
  131. PhonoDude
  132. Lafayette Phono/Reverb /Center channel amp
  133. Seller recommendation needed.
  134. Jeffrey's Super Circlotron (hybrid)
  135. Request for obscure heater specs
  136. Jolida JD1501RC Service Manual / Schematic
  137. 80W amp with a pair of EL34
  138. Epiphone Valve Junior to HiFi Conversion
  139. Serious Distortion on my DIY Toccata Phono Preamp
  140. Hickok 539b switch settings for 6SL7
  141. Voltage Change9115v/230v) of Audio Research amplifiers
  142. HF oscillation with no load, but only on one channel.
  143. Tube innards
  144. Looking for a tube amp
  145. What happens If I use too weak output transformer?
  146. Chinese amp: 2A3 6SN7 6SJ7 5Z5P push pull
  147. 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
  148. Single Ended EL84 B+
  149. Looking for some PSU advice ...
  150. Electronic transformer filament supply
  151. Which Salas HV shunt regulator should I choose?
  152. Traced an old valve with no specs - thoughts please
  153. Resistor socket?
  154. Dynaco PAS 3X PSU mod
  155. Best sounding 500v. electrolytics
  156. CCS's for CCD line amp?
  157. tube life
  158. For tube amps w/ high output Z - Parallel R cross spkr?
  159. High and low impedance output preamps
  160. LTspice and simulating tube circuits?
  161. Cheap & Well Made Chinese SE EL34 Amp
  162. Heathkit transformer replacement...
  163. Integrated amp will not turn on
  164. EL34, Claus Byrith amplifier, mains noise problem
  165. Need a proposal for a stereo amp
  166. 12AT7 Headphone amp
  167. 6l6/12ax7 schematics please
  168. Hybrid bridge with jfet OS
  169. Please allow me to introduce myselft
  170. Chassis Source
  171. Is my 6L6 amp damaged from EL34's
  172. VISHAY VTA 55 Bulk Metal Foil Resistors?
  173. High-Voltage Power for 6 stage pedal
  174. 10 megaohms??
  175. E180F V EF184
  176. help on gain calculation with transformer for SE tube
  177. Working with constant current charts
  178. Hum and noise in small amp
  179. My project (6c33SET)
  180. EZ260A Grommes 260A Project
  181. 18A5 sound fine in triode mode ?
  182. 6GF5 sound fine in triode mode ?
  183. Muddy 6V6 Power Amp?
  184. GM 70 Schematic needed!
  185. tube simulatie models.
  186. building vacuum tubes... some questons
  187. Hot Rodded Dynaco ST-35 - Dynakit Parts Kit
  188. Fixed bias on small signal pentode
  189. Buffer preamplifier
  190. 7027a testing
  191. decade bank values for a plate current tester
  192. anyone know the dimensions of a dynakit st-70 pcb?
  193. Help on designing full DHT SET power amplifier
  194. dc coupled volume pot value
  195. 20W OTL with 6N5P, Opinions...
  196. Finding parts
  197. Tube's JLH hybrid solution
  198. Curtis Mathes Console / TV receiver
  199. Marantz 8b feedback circuit
  200. Noisy volume pot with some tubes but not others
  201. Found an Eico HF-86 for sale, is it worth it?
  202. Paco T-60 Tube Tester
  203. Aikido all in one heater issue
  204. Need a little help with Chinese tube Preamp
  205. Choke Loaded Const. Current Draw Amp
  206. 6550 SINGLE-ENDED AMPLIFIER
  207. Balancing pp driver stage
  208. P-P 6C33
  209. Need help with Cornet 2
  210. More articles for the Wireless World Archive
  211. Recommendations for a valve amp kit
  212. 2 watt amplifier
  213. 1AX7
  214. 2 x 6as7 -> u=?
  215. Help with transformer
  216. Building a mu-follower stage
  217. ecl11 - ecl86 replacement
  218. Please comment on this grounding scheme.
  219. A tube-preamp with DSP-DAC-Touchscreen-and Music Streaming...
  220. Microphone modification help
  221. Microphone modification help
  222. First time hearing an SET
  223. Rattle can a power transformer
  224. Need better RIAA circuit for my phono amp.
  225. Input volume pot wiring
  226. Constant current heating undervoltage
  227. Some tube info that I hope is helpful
  228. Toroidal output transormers
  229. cathode bypass on opt secondary
  230. Push Pull Powersupply Test Question?
  231. Recommandation please..
  232. My new humble thread
  233. KT88 single stage pp - cascode diff amp
  234. foot switch safety question
  235. Which KT88 Brand to Buy?Sso many to choose
  236. 12ax7 perfect bias point
  237. preamplifier/driver for 807
  238. Help with Quad II hum
  239. 18K audio note output transformer
  240. Small tube amp conversion help 6x4, 6AU6, 6AQ5
  241. Hybrid never see
  242. "Next to Last" PAS Project
  243. Power supply overload
  244. Home build 6L6 pp amp buzzing noise
  245. 807 monoblocks with big PSU
  246. SET amps and crossovers.....?
  247. Sockets for 6P41S
  248. 6dj8 phono amp
  249. Jolida Score!!!!
  250. voltage boost

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