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  1. Inclusion of an oscilloscope on tester
  2. 6V6SE - Suggestions?
  3. Heretical Line Stage: BOM?
  4. Tube amp to drive 4 ohm headphones?
  5. Another TVA1 - KT88 power amplifier
  6. 845 parafeed
  7. datasheet 6P44C
  8. ecc85 tube buffer or line stage?
  9. Valvestate 8080 That's been dog Peed...
  10. pre war gibson eh125 schematic question
  11. "An elegant full function tube preamp mated to 1st rate SS power amp"
  12. How to select a good Hifi 12AX7 tube?
  13. LTP with CCS and negative PS
  14. Odd phase splitter
  15. Yet Another Hybrid Amplifier
  16. what Lundahl OPT for headphone 2A3 amp? (for HD800)
  17. Heater to Cathode voltage e88cc
  18. ASR-433
  19. Marantz 8B phase splitter
  20. Silvertone 1485 - Output Transformer advice
  21. Bob Latino ST120 Down
  22. SS phase splitters?
  23. Supply Filtering and why Capacitance Multipliers are NOT the Answer
  24. SE 6L6 to KT88
  25. HT power supply design
  26. Good tubes for concertina - 4P1L maybe?
  27. Powr supply question
  28. What is wrong with this Amplifier?
  29. Palmer DREI - Three SE Output Tubes Together?
  30. Heathkit TC-2 Checker and KT88s
  31. my Dummy Amp Contraption
  32. HF Oscillation Heat-Up Spk's Magnet!?
  33. Triode calculations
  34. Western Electric 131
  35. Electrolytic vs. Film 2A3 Cathode Bypass?
  36. Sylvania JAN 6SN7WGTA, late 1970's
  37. TV7 tester problem with 6CB5A tube
  38. Stromberg-Carlson AP-55
  39. SHUGUANG 2A3
  40. Circuit breaker help.
  41. Recommend me a bookshelf speaker for 5W
  42. Monarch STA 100X weird?
  43. 1954 US Army "Sound Repeater" amplifier
  44. 6N7...this configuration work ?
  45. RIAA Active EQ
  46. Direct Coupled E-Linear Amp
  47. Double Triode Mu
  48. Music Angel kt88 new pcbs problem
  49. EL503 replacement?
  50. Reducing gain in a SRPP circuit with ECC82?
  51. 12XX7 Triodes
  52. Output Tx just for interest
  53. Valab in Taiwan output transformers
  54. Impedance Question
  55. How to include a dual triode tube in a KiCAD schematic?
  56. 12U7 SPICE Model
  57. Phono Stage Woofer Bounce
  58. Problem with new L3-3 please help!
  59. Edcor output transformer...very nice !!!
  60. SE Hybrid Amp "The Lunatic one"
  61. Marantz 8b power transformer B+ down 30%
  62. Single or paralell trafo?
  63. CJ PV 5 Impedance?
  64. ECF80 driving EL84 PP
  65. Luhdahl LL1660S what current rating for D3a driver?
  66. what's that cap?
  67. SE EL84 Component placement Suggestion
  68. How to make a cheap 6N3 Buffer Amp even better?
  69. buying Tube Amps need advice/opinions
  70. Best driver and Power 6V6 By Officina
  71. dynaco pas3
  72. 5U4GB full-wave bridge, stumped
  73. Complete Module Driver and Power with DHT 6B4G
  74. HELP NEEDED for a 6CA4/EZ81 power supply
  75. OT for 2A3 PSE w/Parafeed
  76. More Dynaco Mark VI Questions
  77. curious feedback in circuit of Pioneer SM-Q300 receiver
  78. Hytron 2E25 - Other forgotten and marvelous tube !
  79. need tube upgrade advice please sir
  80. buyer beware
  81. Analog tube for DAC & Power supply with valve EZ_80
  82. JJ 5y3S pin 1??
  83. My first Sansui AU-111 Rebuild
  84. Capacitor-induced distortion
  85. Elevating Heater Voltage with multiple Transformer Heater Secondaries
  86. Common Cathode as DAC output
  87. Pre-Amp with russian tubes 1j24b
  88. How to calculate, the output impedance of a tube with grounded grid
  89. How To Draw Load Line With Output Transformer ?
  90. Inter electrode capacitance.
  91. My amp is an oscillator !
  92. TESLA PL509
  93. What value for Va ?
  94. Help selecting an input transformer ?
  95. Should same valves grid voltage vary much ?
  96. Driver options for 300B-XLS (4P1L-IS-4P1L-IS)
  97. Restoring a Scott 299-B
  98. Latest project, 80 watt valve amplifier
  99. PP Amp Doubling Output Power
  100. Setting up a Wilson current mirror as a differential load
  101. interested in tube amps
  102. Baldwin 45P amp project
  103. DIYGene's Jadis JP-200 Preamp Kit
  104. Need design/schematic for 6H30P driven 6C33C SET
  105. Substitute 6AQ8 for my 6CG7's
  106. 6bq5 tubes in a Heathkit AA-151
  107. Marantz 8b restoration: colour code, prints, schematics
  108. Show me your screen drive circuits
  109. Potting Compounds
  110. Chokes in the ground "plane"
  111. OTL idea
  112. Balance control tip for newbee's
  113. Ebay win - is this any good?
  114. 6sn7 pse amp for altec lansing 604E
  115. "Cockeyed Bridge" with damper diode?
  116. Mac 2100 Hybrid
  117. Single-Stage Hybrid Cascode Power Amp
  118. New to Tube amps, heathkit question
  119. 6AS7 OTL PL build
  120. On Bootstrapping diodes for UL G2 MOSFET
  121. Chasing Aikido "hum"
  122. valve monobloc designs
  123. 7A5 is a good driver for the 300B ?
  124. Parallel Push Pull 6V6 design
  125. Black cat caps?
  126. Soundstage
  127. Brains & Brawn CF : where's the catch ?
  128. ISO-TANGO to quit
  129. Shifting reflective loads using secondary taps?
  130. VTL -- 20 6550's a side and their xfmrs
  131. "Diamond" tube preamp with 12au7
  132. Wich factory made this tube ?
  133. Bootstrapped Cathode Coupled Amplifier
  134. OTL 6AS7
  135. Diode performance testing
  136. Monacor SA-10
  137. Volume Control Hum
  138. Stromberg-Carlson AP-50
  139. 5 wire and 3 wire output transformer change ?
  140. Yaqin mc 10L
  141. Can OTL Ciclotron amp use solid state regulated PS?
  142. Cross-channel overtalk with strange effects
  143. Why 6.3V?
  144. KT88 Williamson Design Questions
  145. Winding a center-tap secondary
  146. HV delay switch
  147. McIntosh MC-30...Balanced Input Feasible?
  148. Designing line driver / pre-amp
  149. Bucking and boosting a tube power transformer
  150. 33A-158M
  151. All DHT integrated amp
  152. 6N1P
  153. basic query - Pete Millett 807 board.
  154. Tube Tester with undocumented tubes
  155. "Fritz" the Boston/RI tube guy - ANYONE know what became of him??
  156. EI yugoslavia gone forever.
  157. Quicksilver 8417 Design - Stay with it or modify?
  158. Looking for some advice on odd preamp noise issue
  159. Tubes in an opamp feedback loop ?
  160. Jensen P-P Cathode Follower
  161. Cathode follower rigorous definition.
  162. Little Bear P3 ?!?! opinions ?
  163. NOS GU-81
  164. OPT endbell color!
  165. Music Angel kt88 with unbalanced output.. help me!
  166. Heater Supply Center Tap
  167. SCA-35 Pot noise
  168. Conrad Johnson MV 55
  169. Comments on 6C33C-B ARG OTL
  170. Construction tips for high voltage amps.
  171. 6L6 bias
  172. came across Mingda Tube king mono blocks
  173. a lot of noise
  174. El84 pp Amp problem
  175. Power on filament current surge question
  176. Its likely a repost but W/e
  177. Scored some 8236's....
  178. What causes valve to glow red inside ?
  179. Tubes and radioisotope decay
  180. PSUDII Question
  181. DIY Bias Buddy
  182. Recommend me a high power OPT
  183. Design Shorting Tubes?
  184. Microsoft Tube Amp and Speakers
  185. S5 K-16LS Tone Control - Help Please
  186. SEUL Circuit for PL519, has anyone here built this?
  187. Motorola three channel
  188. Your own builders book
  189. WE91A - high frequency roll off
  190. Dynaco MarkIII dimensions
  191. Leak TL12+ smoothing capacitors.
  192. Crate Palomino V8 potentiometer replacement
  193. Question about failing 6550 output
  194. Need help converting Ampex 960 R2R to a preamp...
  195. 5751 SPICE Model -- for Poddwatt II
  196. Configuring an Audio Transformer for 8 Ohmsuring
  197. OTL Blocking cap / RC filter
  198. What do you think..OP Tx
  199. Does anyone have GA399MA.pdf?
  200. New Amp Build, First Post
  201. Twisting HV leads
  202. Phono MC/MM Stage like Audio Space Reference Two RIAA Section
  203. Help with AVO MK IV Meter
  204. Why use a pentode?
  205. Filter choke temperature concerns
  206. Is my output transformer damaged?
  207. Parafeed without a cap
  208. Edcor Transformer Problems
  209. From The Daft Idea Department
  210. Do I need a resistor between plates? pic included.
  211. Tube preamp overheating characteristics?
  212. Valve amplifier sounds great
  213. volume pot hum at low and high volume
  214. Thank You
  215. Help Needed ;)
  216. Mullard EL-34: new vs vintage
  217. A new IC for monitoring tubes
  218. 6L6 transformer on EL84
  219. Output transformer design
  220. Tubes4HiFi preamp questions
  221. Newbie advice - Phono Preamp/1st electronics build
  222. Got a HeathKit, now what to do?
  223. 4P1L push pull amp with Lundahl zero global feedback
  224. 12AQ5 SE Amp Issue
  225. ISO a motorboat
  226. Tube characteristic - Originates from pre or power amp tubes?
  227. swapping console amps...
  228. swapping console amps...
  229. Hum issue in PAS Aikido
  230. Hammond Transformer Warranty
  231. 6CB5 in triode PP?
  232. Input capacitance when tube is not conducting
  233. What would you build with these output transformers?
  234. Need help with new tube for my amp
  235. Does the method for loading the plate affect gain of the stage?
  236. Slightly Sick Amplifier
  237. OP Tx for signal tubes in Headphone amps
  238. Listing of Radio Amateur/HAM Flea Markets In Europe
  239. need mac kit 30 transformer
  240. Is this transformer saturation? (pictures inside)
  241. Did I use the LR8 in this EF86 preamp correctly?
  242. Who recognizes the chassis of this amp
  243. Sweep tubes in Push-Pull-Parallel
  244. EZ125 Quad KT88 Project
  245. Need a help! OPT design assistant software
  246. Ready To Build the Other
  247. Harman Kardon Citation II
  248. Relays for tube voltages
  249. Okay, Can someone suggest if this PSU can work
  250. ELROG 211 and 845 tubes

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