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  1. Russian Tube Codes
  2. Help: Driver Stage Design
  3. PAS Power Transformer Capability
  4. 7A5 tube...a small marvel !!!
  5. phono preamp for the s5 electronics model 16ls amp
  6. Screen Stopper Blew
  7. Hickok 533 and 6dj8/6922
  8. OTL design opinion
  9. Pile of TEK scopes.........what do I keep?
  10. Inclusion of an oscilloscope on tester
  11. 6V6SE - Suggestions?
  12. Heretical Line Stage: BOM?
  13. Tube amp to drive 4 ohm headphones?
  14. Another TVA1 - KT88 power amplifier
  15. 845 parafeed
  16. datasheet 6P44C
  17. ecc85 tube buffer or line stage?
  18. Valvestate 8080 That's been dog Peed...
  19. "An elegant full function tube preamp mated to 1st rate SS power amp"
  20. How to select a good Hifi 12AX7 tube?
  21. LTP with CCS and negative PS
  22. Odd phase splitter
  23. Yet Another Hybrid Amplifier
  24. what Lundahl OPT for headphone 2A3 amp? (for HD800)
  25. Heater to Cathode voltage e88cc
  26. ASR-433
  27. Marantz 8B phase splitter
  28. Bob Latino ST120 Down
  29. SS phase splitters?
  30. Supply Filtering and why Capacitance Multipliers are NOT the Answer
  31. SE 6L6 to KT88
  32. HT power supply design
  33. Good tubes for concertina - 4P1L maybe?
  34. Powr supply question
  35. What is wrong with this Amplifier?
  36. Palmer DREI - Three SE Output Tubes Together?
  37. Heathkit TC-2 Checker and KT88s
  38. my Dummy Amp Contraption
  39. HF Oscillation Heat-Up Spk's Magnet!?
  40. Triode calculations
  41. Western Electric 131
  42. Electrolytic vs. Film 2A3 Cathode Bypass?
  43. Sylvania JAN 6SN7WGTA, late 1970's
  44. TV7 tester problem with 6CB5A tube
  45. Stromberg-Carlson AP-55
  46. SHUGUANG 2A3
  47. Circuit breaker help.
  48. Recommend me a bookshelf speaker for 5W
  49. Monarch STA 100X weird?
  50. 1954 US Army "Sound Repeater" amplifier
  51. 6N7...this configuration work ?
  52. RIAA Active EQ
  53. Direct Coupled E-Linear Amp
  54. Double Triode Mu
  55. Music Angel kt88 new pcbs problem
  56. EL503 replacement?
  57. Reducing gain in a SRPP circuit with ECC82?
  58. 12XX7 Triodes
  59. Output Tx just for interest
  60. Valab in Taiwan output transformers
  61. Impedance Question
  62. How to include a dual triode tube in a KiCAD schematic?
  63. 12U7 SPICE Model
  64. Phono Stage Woofer Bounce
  65. Problem with new L3-3 please help!
  66. Edcor output transformer...very nice !!!
  67. SE Hybrid Amp "The Lunatic one"
  68. Marantz 8b power transformer B+ down 30%
  69. Single or paralell trafo?
  70. CJ PV 5 Impedance?
  71. ECF80 driving EL84 PP
  72. Luhdahl LL1660S what current rating for D3a driver?
  73. what's that cap?
  74. SE EL84 Component placement Suggestion
  75. How to make a cheap 6N3 Buffer Amp even better?
  76. buying Tube Amps need advice/opinions
  77. dynaco pas3
  78. 5U4GB full-wave bridge, stumped
  79. HELP NEEDED for a 6CA4/EZ81 power supply
  80. OT for 2A3 PSE w/Parafeed
  81. More Dynaco Mark VI Questions
  82. curious feedback in circuit of Pioneer SM-Q300 receiver
  83. Hytron 2E25 - Other forgotten and marvelous tube !
  84. need tube upgrade advice please sir
  85. buyer beware
  86. JJ 5y3S pin 1??
  87. My first Sansui AU-111 Rebuild
  88. Capacitor-induced distortion
  89. Elevating Heater Voltage with multiple Transformer Heater Secondaries
  90. Common Cathode as DAC output
  91. Pre-Amp with russian tubes 1j24b
  92. How to calculate, the output impedance of a tube with grounded grid
  93. How To Draw Load Line With Output Transformer ?
  94. Inter electrode capacitance.
  95. My amp is an oscillator !
  96. TESLA PL509
  97. What value for Va ?
  98. Help selecting an input transformer ?
  99. Should same valves grid voltage vary much ?
  100. Driver options for 300B-XLS (4P1L-IS-4P1L-IS)
  101. Restoring a Scott 299-B
  102. Latest project, 80 watt valve amplifier
  103. PP Amp Doubling Output Power
  104. Setting up a Wilson current mirror as a differential load
  105. interested in tube amps
  106. Baldwin 45P amp project
  107. DIYGene's Jadis JP-200 Preamp Kit
  108. Need design/schematic for 6H30P driven 6C33C SET
  109. Substitute 6AQ8 for my 6CG7's
  110. 6bq5 tubes in a Heathkit AA-151
  111. Marantz 8b restoration: colour code, prints, schematics
  112. Show me your screen drive circuits
  113. Potting Compounds
  114. Chokes in the ground "plane"
  115. OTL idea
  116. Balance control tip for newbee's
  117. Ebay win - is this any good?
  118. 6sn7 pse amp for altec lansing 604E
  119. "Cockeyed Bridge" with damper diode?
  120. Mac 2100 Hybrid
  121. Single-Stage Hybrid Cascode Power Amp
  122. New to Tube amps, heathkit question
  123. 6AS7 OTL PL build
  124. On Bootstrapping diodes for UL G2 MOSFET
  125. Chasing Aikido "hum"
  126. valve monobloc designs
  127. 7A5 is a good driver for the 300B ?
  128. Parallel Push Pull 6V6 design
  129. Soundstage
  130. Brains & Brawn CF : where's the catch ?
  131. ISO-TANGO to quit
  132. Shifting reflective loads using secondary taps?
  133. VTL -- 20 6550's a side and their xfmrs
  134. "Diamond" tube preamp with 12au7
  135. Wich factory made this tube ?
  136. Bootstrapped Cathode Coupled Amplifier
  137. OTL 6AS7
  138. Diode performance testing
  139. Monacor SA-10
  140. Volume Control Hum
  141. Stromberg-Carlson AP-50
  142. 5 wire and 3 wire output transformer change ?
  143. Yaqin mc 10L
  144. Can OTL Ciclotron amp use solid state regulated PS?
  145. Cross-channel overtalk with strange effects
  146. Why 6.3V?
  147. KT88 Williamson Design Questions
  148. Winding a center-tap secondary
  149. HV delay switch
  150. McIntosh MC-30...Balanced Input Feasible?
  151. Designing line driver / pre-amp
  152. Bucking and boosting a tube power transformer
  153. 33A-158M
  154. All DHT integrated amp
  155. 6N1P
  156. basic query - Pete Millett 807 board.
  157. Tube Tester with undocumented tubes
  158. "Fritz" the Boston/RI tube guy - ANYONE know what became of him??
  159. EI yugoslavia gone forever.
  160. Quicksilver 8417 Design - Stay with it or modify?
  161. Looking for some advice on odd preamp noise issue
  162. Tubes in an opamp feedback loop ?
  163. Jensen P-P Cathode Follower
  164. Cathode follower rigorous definition.
  165. Little Bear P3 ?!?! opinions ?
  166. NOS GU-81
  167. OPT endbell color!
  168. Music Angel kt88 with unbalanced output.. help me!
  169. Heater Supply Center Tap
  170. SCA-35 Pot noise
  171. Conrad Johnson MV 55
  172. Comments on 6C33C-B ARG OTL
  173. Construction tips for high voltage amps.
  174. 6L6 bias
  175. came across Mingda Tube king mono blocks
  176. a lot of noise
  177. El84 pp Amp problem
  178. Power on filament current surge question
  179. Its likely a repost but W/e
  180. Scored some 8236's....
  181. What causes valve to glow red inside ?
  182. Tubes and radioisotope decay
  183. PSUDII Question
  184. DIY Bias Buddy
  185. Recommend me a high power OPT
  186. Design Shorting Tubes?
  187. Microsoft Tube Amp and Speakers
  188. S5 K-16LS Tone Control - Help Please
  189. SEUL Circuit for PL519, has anyone here built this?
  190. Motorola three channel
  191. Your own builders book
  192. WE91A - high frequency roll off
  193. Dynaco MarkIII dimensions
  194. Leak TL12+ smoothing capacitors.
  195. Question about failing 6550 output
  196. Need help converting Ampex 960 R2R to a preamp...
  197. 5751 SPICE Model -- for Poddwatt II
  198. Configuring an Audio Transformer for 8 Ohmsuring
  199. OTL Blocking cap / RC filter
  200. What do you think..OP Tx
  201. Does anyone have GA399MA.pdf?
  202. New Amp Build, First Post
  203. Twisting HV leads
  204. Phono MC/MM Stage like Audio Space Reference Two RIAA Section
  205. Help with AVO MK IV Meter
  206. Why use a pentode?
  207. Filter choke temperature concerns
  208. Is my output transformer damaged?
  209. Parafeed without a cap
  210. Edcor Transformer Problems
  211. From The Daft Idea Department
  212. Do I need a resistor between plates? pic included.
  213. Tube preamp overheating characteristics?
  214. Valve amplifier sounds great
  215. volume pot hum at low and high volume
  216. Thank You
  217. Help Needed ;)
  218. Mullard EL-34: new vs vintage
  219. A new IC for monitoring tubes
  220. 6L6 transformer on EL84
  221. Output transformer design
  222. Tubes4HiFi preamp questions
  223. Newbie advice - Phono Preamp/1st electronics build
  224. Got a HeathKit, now what to do?
  225. 4P1L push pull amp with Lundahl zero global feedback
  226. 12AQ5 SE Amp Issue
  227. ISO a motorboat
  228. Tube characteristic - Originates from pre or power amp tubes?
  229. swapping console amps...
  230. swapping console amps...
  231. Hum issue in PAS Aikido
  232. Hammond Transformer Warranty
  233. 6CB5 in triode PP?
  234. Input capacitance when tube is not conducting
  235. What would you build with these output transformers?
  236. Need help with new tube for my amp
  237. Does the method for loading the plate affect gain of the stage?
  238. Slightly Sick Amplifier
  239. OP Tx for signal tubes in Headphone amps
  240. Listing of Radio Amateur/HAM Flea Markets In Europe
  241. need mac kit 30 transformer
  242. Is this transformer saturation? (pictures inside)
  243. Did I use the LR8 in this EF86 preamp correctly?
  244. Who recognizes the chassis of this amp
  245. Sweep tubes in Push-Pull-Parallel
  246. EZ125 Quad KT88 Project
  247. Need a help! OPT design assistant software
  248. Ready To Build the Other
  249. Harman Kardon Citation II
  250. Relays for tube voltages

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