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  1. "An elegant full function tube preamp mated to 1st rate SS power amp"
  2. How to select a good Hifi 12AX7 tube?
  3. LTP with CCS and negative PS
  4. Odd phase splitter
  5. Yet Another Hybrid Amplifier
  6. what Lundahl OPT for headphone 2A3 amp? (for HD800)
  7. Heater to Cathode voltage e88cc
  8. ASR-433
  9. Marantz 8B phase splitter
  10. Bob Latino ST120 Down
  11. SS phase splitters?
  12. Supply Filtering and why Capacitance Multipliers are NOT the Answer
  13. SE 6L6 to KT88
  14. HT power supply design
  15. Good tubes for concertina - 4P1L maybe?
  16. Powr supply question
  17. What is wrong with this Amplifier?
  18. Palmer DREI - Three SE Output Tubes Together?
  19. Heathkit TC-2 Checker and KT88s
  20. my Dummy Amp Contraption
  21. HF Oscillation Heat-Up Spk's Magnet!?
  22. Triode calculations
  23. Western Electric 131
  24. Electrolytic vs. Film 2A3 Cathode Bypass?
  25. Sylvania JAN 6SN7WGTA, late 1970's
  26. TV7 tester problem with 6CB5A tube
  27. Stromberg-Carlson AP-55
  28. SHUGUANG 2A3
  29. Circuit breaker help.
  30. Recommend me a bookshelf speaker for 5W
  31. Monarch STA 100X weird?
  32. 1954 US Army "Sound Repeater" amplifier
  33. 6N7...this configuration work ?
  34. RIAA Active EQ
  35. Direct Coupled E-Linear Amp
  36. Double Triode Mu
  37. Music Angel kt88 new pcbs problem
  38. EL503 replacement?
  39. Reducing gain in a SRPP circuit with ECC82?
  40. 12XX7 Triodes
  41. Output Tx just for interest
  42. Valab in Taiwan output transformers
  43. Impedance Question
  44. How to include a dual triode tube in a KiCAD schematic?
  45. 12U7 SPICE Model
  46. Phono Stage Woofer Bounce
  47. Problem with new L3-3 please help!
  48. Edcor output transformer...very nice !!!
  49. SE Hybrid Amp "The Lunatic one"
  50. Marantz 8b power transformer B+ down 30%
  51. Single or paralell trafo?
  52. CJ PV 5 Impedance?
  53. ECF80 driving EL84 PP
  54. Luhdahl LL1660S what current rating for D3a driver?
  55. what's that cap?
  56. SE EL84 Component placement Suggestion
  57. How to make a cheap 6N3 Buffer Amp even better?
  58. buying Tube Amps need advice/opinions
  59. dynaco pas3
  60. 5U4GB full-wave bridge, stumped
  61. HELP NEEDED for a 6CA4/EZ81 power supply
  62. OT for 2A3 PSE w/Parafeed
  63. More Dynaco Mark VI Questions
  64. curious feedback in circuit of Pioneer SM-Q300 receiver
  65. Hytron 2E25 - Other forgotten and marvelous tube !
  66. need tube upgrade advice please sir
  67. buyer beware
  68. JJ 5y3S pin 1??
  69. My first Sansui AU-111 Rebuild
  70. Capacitor-induced distortion
  71. Elevating Heater Voltage with multiple Transformer Heater Secondaries
  72. Common Cathode as DAC output
  73. Pre-Amp with russian tubes 1j24b
  74. How to calculate, the output impedance of a tube with grounded grid
  75. How To Draw Load Line With Output Transformer ?
  76. Inter electrode capacitance.
  77. My amp is an oscillator !
  78. TESLA PL509
  79. What value for Va ?
  80. Help selecting an input transformer ?
  81. Should same valves grid voltage vary much ?
  82. Driver options for 300B-XLS (4P1L-IS-4P1L-IS)
  83. Restoring a Scott 299-B
  84. Latest project, 80 watt valve amplifier
  85. PP Amp Doubling Output Power
  86. Setting up a Wilson current mirror as a differential load
  87. interested in tube amps
  88. Baldwin 45P amp project
  89. DIYGene's Jadis JP-200 Preamp Kit
  90. Need design/schematic for 6H30P driven 6C33C SET
  91. Substitute 6AQ8 for my 6CG7's
  92. 6bq5 tubes in a Heathkit AA-151
  93. Marantz 8b restoration: colour code, prints, schematics
  94. Show me your screen drive circuits
  95. Potting Compounds
  96. Chokes in the ground "plane"
  97. OTL idea
  98. Balance control tip for newbee's
  99. Ebay win - is this any good?
  100. 6sn7 pse amp for altec lansing 604E
  101. "Cockeyed Bridge" with damper diode?
  102. Mac 2100 Hybrid
  103. Single-Stage Hybrid Cascode Power Amp
  104. New to Tube amps, heathkit question
  105. 6AS7 OTL PL build
  106. On Bootstrapping diodes for UL G2 MOSFET
  107. Chasing Aikido "hum"
  108. valve monobloc designs
  109. 7A5 is a good driver for the 300B ?
  110. Parallel Push Pull 6V6 design
  111. Soundstage
  112. Brains & Brawn CF : where's the catch ?
  113. ISO-TANGO to quit
  114. Shifting reflective loads using secondary taps?
  115. VTL -- 20 6550's a side and their xfmrs
  116. "Diamond" tube preamp with 12au7
  117. Wich factory made this tube ?
  118. Bootstrapped Cathode Coupled Amplifier
  119. OTL 6AS7
  120. Diode performance testing
  121. Monacor SA-10
  122. Volume Control Hum
  123. Stromberg-Carlson AP-50
  124. 5 wire and 3 wire output transformer change ?
  125. Yaqin mc 10L
  126. Can OTL Ciclotron amp use solid state regulated PS?
  127. Cross-channel overtalk with strange effects
  128. Why 6.3V?
  129. KT88 Williamson Design Questions
  130. Winding a center-tap secondary
  131. HV delay switch
  132. McIntosh MC-30...Balanced Input Feasible?
  133. Designing line driver / pre-amp
  134. Bucking and boosting a tube power transformer
  135. 33A-158M
  136. All DHT integrated amp
  137. 6N1P
  138. basic query - Pete Millett 807 board.
  139. Tube Tester with undocumented tubes
  140. "Fritz" the Boston/RI tube guy - ANYONE know what became of him??
  141. EI yugoslavia gone forever.
  142. Quicksilver 8417 Design - Stay with it or modify?
  143. Looking for some advice on odd preamp noise issue
  144. Tubes in an opamp feedback loop ?
  145. Jensen P-P Cathode Follower
  146. Cathode follower rigorous definition.
  147. Little Bear P3 ?!?! opinions ?
  148. NOS GU-81
  149. OPT endbell color!
  150. Music Angel kt88 with unbalanced output.. help me!
  151. Heater Supply Center Tap
  152. SCA-35 Pot noise
  153. Conrad Johnson MV 55
  154. Comments on 6C33C-B ARG OTL
  155. Construction tips for high voltage amps.
  156. 6L6 bias
  157. came across Mingda Tube king mono blocks
  158. a lot of noise
  159. El84 pp Amp problem
  160. Power on filament current surge question
  161. Its likely a repost but W/e
  162. Scored some 8236's....
  163. What causes valve to glow red inside ?
  164. Tubes and radioisotope decay
  165. PSUDII Question
  166. DIY Bias Buddy
  167. Recommend me a high power OPT
  168. Design Shorting Tubes?
  169. Microsoft Tube Amp and Speakers
  170. S5 K-16LS Tone Control - Help Please
  171. SEUL Circuit for PL519, has anyone here built this?
  172. Motorola three channel
  173. Your own builders book
  174. WE91A - high frequency roll off
  175. Dynaco MarkIII dimensions
  176. Leak TL12+ smoothing capacitors.
  177. Question about failing 6550 output
  178. Need help converting Ampex 960 R2R to a preamp...
  179. 5751 SPICE Model -- for Poddwatt II
  180. Configuring an Audio Transformer for 8 Ohmsuring
  181. OTL Blocking cap / RC filter
  182. What do you think..OP Tx
  183. Does anyone have GA399MA.pdf?
  184. New Amp Build, First Post
  185. Twisting HV leads
  186. Phono MC/MM Stage like Audio Space Reference Two RIAA Section
  187. Help with AVO MK IV Meter
  188. Why use a pentode?
  189. Filter choke temperature concerns
  190. Is my output transformer damaged?
  191. Parafeed without a cap
  192. Edcor Transformer Problems
  193. From The Daft Idea Department
  194. Do I need a resistor between plates? pic included.
  195. Tube preamp overheating characteristics?
  196. Valve amplifier sounds great
  197. volume pot hum at low and high volume
  198. Thank You
  199. Help Needed ;)
  200. Mullard EL-34: new vs vintage
  201. A new IC for monitoring tubes
  202. 6L6 transformer on EL84
  203. Output transformer design
  204. Tubes4HiFi preamp questions
  205. Newbie advice - Phono Preamp/1st electronics build
  206. Got a HeathKit, now what to do?
  207. 4P1L push pull amp with Lundahl zero global feedback
  208. 12AQ5 SE Amp Issue
  209. ISO a motorboat
  210. Tube characteristic - Originates from pre or power amp tubes?
  211. swapping console amps...
  212. swapping console amps...
  213. Hum issue in PAS Aikido
  214. Hammond Transformer Warranty
  215. 6CB5 in triode PP?
  216. Input capacitance when tube is not conducting
  217. What would you build with these output transformers?
  218. Need help with new tube for my amp
  219. Does the method for loading the plate affect gain of the stage?
  220. Slightly Sick Amplifier
  221. OP Tx for signal tubes in Headphone amps
  222. Listing of Radio Amateur/HAM Flea Markets In Europe
  223. need mac kit 30 transformer
  224. Is this transformer saturation? (pictures inside)
  225. Did I use the LR8 in this EF86 preamp correctly?
  226. Who recognizes the chassis of this amp
  227. Sweep tubes in Push-Pull-Parallel
  228. EZ125 Quad KT88 Project
  229. Need a help! OPT design assistant software
  230. Ready To Build the Other
  231. Harman Kardon Citation II
  232. Relays for tube voltages
  233. Okay, Can someone suggest if this PSU can work
  234. ELROG 211 and 845 tubes
  235. Has anyone tried this tube preamp
  236. filament choke testing
  237. Grounded-Grid MC Head Amp for 2x PC900 and Lyra Delos
  238. output transformer sizing - is there such a thing as to big?
  239. Advice for dummies...from a new to the forum dummy
  240. Counterpoint Tech
  241. Line Magnetic 211-IA: Schematic?
  242. Help with harmon kardon a50k
  243. anyone ID these Magnecord amplifiers?
  244. vintage vacuum audio site
  245. Hiraga preamp line+phono 4xECC81 SRPP
  246. Why no simple 2-stage EL34 PP amps?
  247. Dynaco MKIII mod
  248. Blown Up Sir...
  249. Leak stereo20
  250. FFT Hanning Data

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