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  1. 6P8S datasheet, help !!
  2. DHT IMD
  3. How to calculate OPT transformer windings
  4. Newbie Questions
  5. Building a Harmonic Distortion Generator
  6. plate curves and max ratings questions
  7. Heater-cathode DC conduction resistance
  8. EL 84 Capacitor Equivalent
  9. How do they get away with this?
  10. well-loved Sherwood "popping" prob mouse pee
  11. Tube Newb: 12sn7 and 12sl7 interchangeable?
  12. Totem-Pole OTL with 6c33c tubes and 0.079 % THD at 20 Watt
  13. sonic frontiers sfm-75
  14. Chinese tube amp mods?
  15. PSU for JE Labs Simple 45/2A3
  16. frustrated ,Bought a 845 NOS - springs are discconnected need help
  17. Running water sound in amp
  18. Peerless 16458 output transformers
  19. Noisy high-gain preamplifier
  20. Cheap ($235) SE Tube amp kit, transformer and chassis on ebay
  21. 2A3 single plate RCA/Cunningham tube prices
  22. output transformer power rating
  23. Rectifier Foward Voltage?
  24. Help With 6Y6 amp
  25. What are 12AT7/ECC81 power drivers ?
  26. Help with these Russian GU50 tube amplifier
  27. Eico ST-70 Supermods
  28. Mullard PZ30, how's its Peak Inverse Voltage?
  29. Optical compressor project
  30. 12AU7 in cascode configuration
  31. Bad tube in old record player?
  32. check this out glas-fiber cartridge
  33. cathode caps
  34. Aikido HV PSU
  35. Distance between 6N23P and a cap?
  36. solid and strand wire in amp
  37. Phillips Music Sudio
  38. LTPI Grid stopper value affect on harmonics
  39. WTF. What's going on here.
  40. 7-pin pcb mount socket with shield?
  41. SIMPLE remote volume control with alps motorized pot
  42. Hybrid Partial Feedback SE Amplifier
  43. HV +B Connector
  44. Eico experts needed: PEC in 2050 driver stage bad
  45. Best sounding linestage/buffer topology?
  46. Using ECC88
  47. what tubes should I upgrade a mini watt with I currently have the stock 6p14 and 6bq5
  48. EL34 cathode bias PA
  49. Tube Amp Art
  50. Quick OT Question
  51. Power Transformer
  52. ampex 354? some questions
  53. Good power Filter Capacitors
  54. Fisher 101d blow fuse
  55. Valco Model 1200 help
  56. Jolida 502A lost output...?
  57. Codename "Tapyrus", my ongoing DIY headphone amp
  58. RIAA preamp with DHTs
  59. Dynaco Mark VI feedback values
  60. Eagle PCB
  61. Ode to Tube Rollers
  62. switching tubes: good or bad idea?
  63. COnn Organ Amp DI266 Info 12v6GT tubes
  64. Please help me figure out why my plate voltage is too high here
  65. Yaqin MC10L Question for the Guru's
  66. PP PSU: How much ripple is too much ripple?
  67. Bypass caps in choke PS
  68. Grounded Grid TRANSCENDENT line stage
  69. Battery Powered Tube Amp
  70. 5Z4PJ 6N2J
  71. Almost there! opinions are welcomed(6C33SET)
  72. Speaker impedance and amp matching?
  73. r core or toroidal output trafo for dynaco st70
  74. Heathkit Returns
  75. How to get started
  76. WANTED: schematic for Eico 2050 Classic Series
  77. winding an output transformer
  78. 12AX7 vacuum tube pre-amp?
  79. motor 'defeat' switch for echoplex/etc
  80. Audionote kit L4 and L6
  81. class a audio amplifier 5w with ic ne5532
  82. Fate of my Heathkit W7-M amplifiers
  83. Trying to get my B&K 500 up and running.
  84. Tubelab simple SE ideas
  85. Newcomb E-10B Amplifer
  86. Telefunken RV218 power triode
  87. Crowhurst High Power vs Low Power Amplifiers
  88. Duncan amps PSU designer II help
  89. damper diodes
  90. EL12N in JCM800 clone
  91. Amp design exercise, mentorship needed...
  92. Need help with series filament 25l6GT amp
  93. Dynakit Mark IV Oscillation
  94. Telefunken C3M data
  95. Can a tube guru help with nu>lambda conversions?
  96. plate dissipation vs brand
  97. Solid-state replacements for PAS2/3 rectifiers?
  98. first integrated amp
  99. Problems with Unbalanced to Balanced line matching transformer from EDCOR
  100. st70A mod.kit
  101. Grampian 600u
  102. Suggest amp to drive mangnapan SMGa/MMG
  103. Valve DI box
  104. Yaqin Tube Amplifier
  105. Jensen JT-11P-1 on tube amp input
  106. Amperex PQ 6922 code decifering?
  107. 12ax7 driving a DHT out, why not?
  108. unknown Rogers Pre Power
  109. Mic pre question
  110. power tube power scaler
  111. Tube Rectifier with transformer without Center tap
  112. Can I use this stuff (does it have any value?)
  113. Full regulated power supply for 12au7(preamp)
  114. 6C33 OTL Circlotron
  115. Ammeter connection for Tubelab SE
  116. Unknown output transformer
  117. Building a tube pre/amp copy (6V6)
  118. 6922 pin i.d.
  119. KT88 Push Pull Amp using transistor driver stage
  120. 45 DHT HT Supply oscillating - help!
  121. exceeding plate voltage of the output tube
  122. Fisher 101D
  123. Tubes and Eagle3D
  124. Looking for old amp info
  125. Restoring an old tube amp
  126. Noob Tube Preamp Finished Kit Transformer HOT!
  127. the tv underrated tubes
  128. Headphone Amp
  129. What is needed to drive 86db speakers and sound *good*?
  130. ef86 - plate voltage
  131. Output signal distortion
  132. Minimum Acceptable Gm
  133. Anyone have experience with the 6SD7GT tube ?
  134. Identifying an ultralinear OPT
  135. A good sounding EL34 PP sch please
  136. THE CHAMP CBA-20807 1000 Watt Valve amplifier
  137. ST-35 First Build
  138. Identifying EL34 tube?
  139. Solid state relais in stean of standby swtich
  140. $75 tube amp kit on eBay???
  141. Power supply RC (ohm's law) question -NEWBIE ALERT
  142. variable power control
  143. reccommend a voltage doubler for bias?
  144. Point to Point build tips
  145. I need some fairly specific capacitors types, like polyester or silva mica.
  146. ecf82 pentode instead of ef86
  147. K-12G vs. K-502
  148. eq in a tiny Directly Heated Cathode amp
  149. Anyone ever try 6C33C SE with Aikido drive?
  150. Help with 1:2 line level input Tx's
  151. 112a preamp need comment please
  152. Excellent (Modified) Williamson Treatise
  153. Vintage Hoffman Stereo Amp Problem - fump, fump, fump
  154. Chicago BO-14 100w amp
  155. ef861 - guitar preamp
  156. volume pot question, help.
  157. Simple B+ delay circuit for tube power amp?
  158. Dynacord Super 61, 62 spares request
  159. My small tube does it work?
  160. Approaching the best primary impedance on low or high side?
  161. CT Trafo and floating psu for circlotron?
  162. Unknown tube, need help to identify!
  163. 6L6 guidance needed
  164. Output Power Question
  165. Can the 7AK7 computer tube work as audio output tube ?
  166. Burned in Power Tubes?
  167. Driver Match for K-12G TubeAmp
  168. KT90 to KT88 with autobias
  169. SRPP DC working condition for Rk1=2Rk2
  170. NOS Russian Reflektor 6P6S (6V6) tubes were a pleasant surprise
  171. the 'sound' of a CF
  172. Hickok I-177B tester help!
  173. Illinois Capacitor or Cornell_Dubilier
  174. Found iron recycling - what possible uses?
  175. Class AB PP - is it any good ?
  176. Stereo to mono by paralleling outputs?
  177. BOX in the making
  178. How about paralleling output tubes
  179. Are they basically Borbely hybrid circuitry?
  180. Service Life at Low Plate Current
  181. Sophia Electric SE Transformers for 813 "Super Schade"
  182. 10W suitcase amp
  183. PP OT made of 2 transformers
  184. If I change B+ do I have to change the circuit?
  185. PhonoDude
  186. Lafayette Phono/Reverb /Center channel amp
  187. Seller recommendation needed.
  188. Jeffrey's Super Circlotron (hybrid)
  189. Request for obscure heater specs
  190. Jolida JD1501RC Service Manual / Schematic
  191. 80W amp with a pair of EL34
  192. Epiphone Valve Junior to HiFi Conversion
  193. Serious Distortion on my DIY Toccata Phono Preamp
  194. Hickok 539b switch settings for 6SL7
  195. help me designing parallel SE guitar amp with 12at7 as power tube
  196. Voltage Change9115v/230v) of Audio Research amplifiers
  197. HF oscillation with no load, but only on one channel.
  198. Tube innards
  199. Peavey valveking 112 lead (distortion) channel doesn't work
  200. Looking for a tube amp
  201. What happens If I use too weak output transformer?
  202. Chinese amp: 2A3 6SN7 6SJ7 5Z5P push pull
  203. 6C33C based Version for Welter's Single Ended Amp (enhanced Forward Transconductance)
  204. Single Ended EL84 B+
  205. Looking for some PSU advice ...
  206. Electronic transformer filament supply
  207. Which Salas HV shunt regulator should I choose?
  208. Traced an old valve with no specs - thoughts please
  209. Resistor socket?
  210. Dynaco PAS 3X PSU mod
  211. Best sounding 500v. electrolytics
  212. CCS's for CCD line amp?
  213. tube life
  214. For tube amps w/ high output Z - Parallel R cross spkr?
  215. High and low impedance output preamps
  216. LTspice and simulating tube circuits?
  217. Cheap & Well Made Chinese SE EL34 Amp
  218. Heathkit transformer replacement...
  219. Integrated amp will not turn on
  220. EL34, Claus Byrith amplifier, mains noise problem
  221. Need a proposal for a stereo amp
  222. 12AT7 Headphone amp
  223. 6l6/12ax7 schematics please
  224. Hybrid bridge with jfet OS
  225. Please allow me to introduce myselft
  226. Chassis Source
  227. Is my 6L6 amp damaged from EL34's
  228. VISHAY VTA 55 Bulk Metal Foil Resistors?
  229. High-Voltage Power for 6 stage pedal
  230. 10 megaohms??
  231. E180F V EF184
  232. help on gain calculation with transformer for SE tube
  233. Working with constant current charts
  234. Hum and noise in small amp
  235. My project (6c33SET)
  236. EZ260A Grommes 260A Project
  237. 18A5 sound fine in triode mode ?
  238. 6GF5 sound fine in triode mode ?
  239. Muddy 6V6 Power Amp?
  240. GM 70 Schematic needed!
  241. tube simulatie models.
  242. building vacuum tubes... some questons
  243. Hot Rodded Dynaco ST-35 - Dynakit Parts Kit
  244. Fixed bias on small signal pentode
  245. Buffer preamplifier
  246. 7027a testing
  247. decade bank values for a plate current tester
  248. anyone know the dimensions of a dynakit st-70 pcb?
  249. Help on designing full DHT SET power amplifier
  250. dc coupled volume pot value

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