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  1. Bad tube in old record player?
  2. check this out glas-fiber cartridge
  3. cathode caps
  4. Aikido HV PSU
  5. Distance between 6N23P and a cap?
  6. solid and strand wire in amp
  7. Phillips Music Sudio
  8. LTPI Grid stopper value affect on harmonics
  9. WTF. What's going on here.
  10. 7-pin pcb mount socket with shield?
  11. SIMPLE remote volume control with alps motorized pot
  12. Hybrid Partial Feedback SE Amplifier
  13. HV +B Connector
  14. Eico experts needed: PEC in 2050 driver stage bad
  15. Best sounding linestage/buffer topology?
  16. Using ECC88
  17. what tubes should I upgrade a mini watt with I currently have the stock 6p14 and 6bq5
  18. EL34 cathode bias PA
  19. Tube Amp Art
  20. Quick OT Question
  21. Power Transformer
  22. ampex 354? some questions
  23. Good power Filter Capacitors
  24. Fisher 101d blow fuse
  25. Jolida 502A lost output...?
  26. Codename "Tapyrus", my ongoing DIY headphone amp
  27. RIAA preamp with DHTs
  28. Dynaco Mark VI feedback values
  29. Eagle PCB
  30. Ode to Tube Rollers
  31. switching tubes: good or bad idea?
  32. COnn Organ Amp DI266 Info 12v6GT tubes
  33. Please help me figure out why my plate voltage is too high here
  34. Yaqin MC10L Question for the Guru's
  35. PP PSU: How much ripple is too much ripple?
  36. Bypass caps in choke PS
  37. Grounded Grid TRANSCENDENT line stage
  38. Battery Powered Tube Amp
  39. 5Z4PJ 6N2J
  40. Almost there! opinions are welcomed(6C33SET)
  41. Speaker impedance and amp matching?
  42. r core or toroidal output trafo for dynaco st70
  43. Heathkit Returns
  44. How to get started
  45. WANTED: schematic for Eico 2050 Classic Series
  46. winding an output transformer
  47. 12AX7 vacuum tube pre-amp?
  48. motor 'defeat' switch for echoplex/etc
  49. Audionote kit L4 and L6
  50. class a audio amplifier 5w with ic ne5532
  51. Fate of my Heathkit W7-M amplifiers
  52. Trying to get my B&K 500 up and running.
  53. Tubelab simple SE ideas
  54. Newcomb E-10B Amplifer
  55. Telefunken RV218 power triode
  56. Crowhurst High Power vs Low Power Amplifiers
  57. Duncan amps PSU designer II help
  58. damper diodes
  59. EL12N in JCM800 clone
  60. Amp design exercise, mentorship needed...
  61. Need help with series filament 25l6GT amp
  62. Dynakit Mark IV Oscillation
  63. Telefunken C3M data
  64. Can a tube guru help with nu>lambda conversions?
  65. plate dissipation vs brand
  66. Solid-state replacements for PAS2/3 rectifiers?
  67. first integrated amp
  68. Problems with Unbalanced to Balanced line matching transformer from EDCOR
  69. st70A mod.kit
  70. Grampian 600u
  71. Suggest amp to drive mangnapan SMGa/MMG
  72. Valve DI box
  73. Yaqin Tube Amplifier
  74. Jensen JT-11P-1 on tube amp input
  75. Amperex PQ 6922 code decifering?
  76. 12ax7 driving a DHT out, why not?
  77. unknown Rogers Pre Power
  78. Mic pre question
  79. power tube power scaler
  80. Tube Rectifier with transformer without Center tap
  81. Can I use this stuff (does it have any value?)
  82. Full regulated power supply for 12au7(preamp)
  83. 6C33 OTL Circlotron
  84. Ammeter connection for Tubelab SE
  85. Unknown output transformer
  86. Building a tube pre/amp copy (6V6)
  87. 6922 pin i.d.
  88. KT88 Push Pull Amp using transistor driver stage
  89. 45 DHT HT Supply oscillating - help!
  90. exceeding plate voltage of the output tube
  91. Fisher 101D
  92. Tubes and Eagle3D
  93. Looking for old amp info
  94. Restoring an old tube amp
  95. Noob Tube Preamp Finished Kit Transformer HOT!
  96. the tv underrated tubes
  97. Headphone Amp
  98. What is needed to drive 86db speakers and sound *good*?
  99. ef86 - plate voltage
  100. Output signal distortion
  101. Minimum Acceptable Gm
  102. Anyone have experience with the 6SD7GT tube ?
  103. Identifying an ultralinear OPT
  104. A good sounding EL34 PP sch please
  105. THE CHAMP CBA-20807 1000 Watt Valve amplifier
  106. ST-35 First Build
  107. Identifying EL34 tube?
  108. Solid state relais in stean of standby swtich
  109. $75 tube amp kit on eBay???
  110. Power supply RC (ohm's law) question -NEWBIE ALERT
  111. variable power control
  112. reccommend a voltage doubler for bias?
  113. Point to Point build tips
  114. I need some fairly specific capacitors types, like polyester or silva mica.
  115. ecf82 pentode instead of ef86
  116. K-12G vs. K-502
  117. eq in a tiny Directly Heated Cathode amp
  118. Anyone ever try 6C33C SE with Aikido drive?
  119. Help with 1:2 line level input Tx's
  120. 112a preamp need comment please
  121. Excellent (Modified) Williamson Treatise
  122. Vintage Hoffman Stereo Amp Problem - fump, fump, fump
  123. Chicago BO-14 100w amp
  124. volume pot question, help.
  125. Simple B+ delay circuit for tube power amp?
  126. Dynacord Super 61, 62 spares request
  127. My small tube does it work?
  128. Approaching the best primary impedance on low or high side?
  129. CT Trafo and floating psu for circlotron?
  130. Unknown tube, need help to identify!
  131. 6L6 guidance needed
  132. Output Power Question
  133. Can the 7AK7 computer tube work as audio output tube ?
  134. Burned in Power Tubes?
  135. Driver Match for K-12G TubeAmp
  136. KT90 to KT88 with autobias
  137. SRPP DC working condition for Rk1=2Rk2
  138. NOS Russian Reflektor 6P6S (6V6) tubes were a pleasant surprise
  139. the 'sound' of a CF
  140. Hickok I-177B tester help!
  141. Found iron recycling - what possible uses?
  142. Class AB PP - is it any good ?
  143. Stereo to mono by paralleling outputs?
  144. BOX in the making
  145. How about paralleling output tubes
  146. Are they basically Borbely hybrid circuitry?
  147. Service Life at Low Plate Current
  148. Sophia Electric SE Transformers for 813 "Super Schade"
  149. 10W suitcase amp
  150. PP OT made of 2 transformers
  151. If I change B+ do I have to change the circuit?
  152. PhonoDude
  153. Lafayette Phono/Reverb /Center channel amp
  154. Seller recommendation needed.
  155. Jeffrey's Super Circlotron (hybrid)
  156. Request for obscure heater specs
  157. Jolida JD1501RC Service Manual / Schematic
  158. 80W amp with a pair of EL34
  159. Epiphone Valve Junior to HiFi Conversion
  160. Serious Distortion on my DIY Toccata Phono Preamp
  161. Hickok 539b switch settings for 6SL7
  162. Voltage Change9115v/230v) of Audio Research amplifiers
  163. HF oscillation with no load, but only on one channel.
  164. Tube innards
  165. Looking for a tube amp
  166. What happens If I use too weak output transformer?
  167. Chinese amp: 2A3 6SN7 6SJ7 5Z5P push pull
  168. 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
  169. Single Ended EL84 B+
  170. Looking for some PSU advice ...
  171. Electronic transformer filament supply
  172. Which Salas HV shunt regulator should I choose?
  173. Traced an old valve with no specs - thoughts please
  174. Resistor socket?
  175. Dynaco PAS 3X PSU mod
  176. Best sounding 500v. electrolytics
  177. CCS's for CCD line amp?
  178. tube life
  179. For tube amps w/ high output Z - Parallel R cross spkr?
  180. High and low impedance output preamps
  181. LTspice and simulating tube circuits?
  182. Cheap & Well Made Chinese SE EL34 Amp
  183. Heathkit transformer replacement...
  184. Integrated amp will not turn on
  185. EL34, Claus Byrith amplifier, mains noise problem
  186. Need a proposal for a stereo amp
  187. 12AT7 Headphone amp
  188. 6l6/12ax7 schematics please
  189. Hybrid bridge with jfet OS
  190. Please allow me to introduce myselft
  191. Chassis Source
  192. Is my 6L6 amp damaged from EL34's
  193. VISHAY VTA 55 Bulk Metal Foil Resistors?
  194. High-Voltage Power for 6 stage pedal
  195. 10 megaohms??
  196. E180F V EF184
  197. help on gain calculation with transformer for SE tube
  198. Working with constant current charts
  199. Hum and noise in small amp
  200. My project (6c33SET)
  201. EZ260A Grommes 260A Project
  202. 18A5 sound fine in triode mode ?
  203. 6GF5 sound fine in triode mode ?
  204. Muddy 6V6 Power Amp?
  205. GM 70 Schematic needed!
  206. tube simulatie models.
  207. building vacuum tubes... some questons
  208. Hot Rodded Dynaco ST-35 - Dynakit Parts Kit
  209. Fixed bias on small signal pentode
  210. Buffer preamplifier
  211. 7027a testing
  212. decade bank values for a plate current tester
  213. anyone know the dimensions of a dynakit st-70 pcb?
  214. Help on designing full DHT SET power amplifier
  215. dc coupled volume pot value
  216. 20W OTL with 6N5P, Opinions...
  217. Finding parts
  218. Tube's JLH hybrid solution
  219. Curtis Mathes Console / TV receiver
  220. Marantz 8b feedback circuit
  221. Noisy volume pot with some tubes but not others
  222. Found an Eico HF-86 for sale, is it worth it?
  223. Paco T-60 Tube Tester
  224. Aikido all in one heater issue
  225. Need a little help with Chinese tube Preamp
  226. Choke Loaded Const. Current Draw Amp
  227. 6550 SINGLE-ENDED AMPLIFIER
  228. Balancing pp driver stage
  229. P-P 6C33
  230. Need help with Cornet 2
  231. More articles for the Wireless World Archive
  232. Recommendations for a valve amp kit
  233. 2 watt amplifier
  234. 1AX7
  235. 2 x 6as7 -> u=?
  236. Help with transformer
  237. Building a mu-follower stage
  238. ecl11 - ecl86 replacement
  239. Please comment on this grounding scheme.
  240. A tube-preamp with DSP-DAC-Touchscreen-and Music Streaming...
  241. Microphone modification help
  242. Microphone modification help
  243. First time hearing an SET
  244. Rattle can a power transformer
  245. Need better RIAA circuit for my phono amp.
  246. Input volume pot wiring
  247. Constant current heating undervoltage
  248. Some tube info that I hope is helpful
  249. Toroidal output transormers
  250. cathode bypass on opt secondary

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