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  1. Low cost class A Hi-Fi amplifier 807 S.E. Ultralinear - Pentode drivers [6G6G]
  2. Configuring 2A3 Driver for 2A3 PSE
  3. Integrated Tube Amp opinion
  4. Ultra-Linear vs. Pentode Longevity
  5. RCA PA amp SA752LO...
  6. Running preamp into acive speakers with cap input
  7. Putting Stock In Carver?
  8. Weak treble
  9. About GU50 PP in UL with separate G2 winding and supply
  10. tube tester comparison
  11. Volume control after the preamp stage or before ?
  12. COPLAND CTA 401 - upgrade of components ?
  13. 2 amp simulation/dummy load for transformer
  14. Optimal Operating Point for E280F Driver for 300B Single End Amplifier
  15. 809 Triodes
  16. PSRR
  17. Looking for a schematic or link to a post
  18. Who makes a Williamson output transformer ?
  19. Help with an S5 K12-G Tube Amp
  20. Turing's new tube amps. Please give staff about.
  21. Life Expectancy of DHT's
  22. 6GB8 data sheet translation needed
  23. Full Wave Rectifiers: Center Tapped vs. Bridged
  24. Vectorscope?
  25. Apple macmini become to 6MD8 tube amp
  26. Potting Wax?
  27. How do I repair my Tube Amp?
  28. asr433 simple problem (i hope)
  29. Russian Tube Codes
  30. Help: Driver Stage Design
  31. PAS Power Transformer Capability
  32. 7A5 tube...a small marvel !!!
  33. phono preamp for the s5 electronics model 16ls amp
  34. Screen Stopper Blew
  35. Hickok 533 and 6dj8/6922
  36. OTL design opinion
  37. Pile of TEK scopes.........what do I keep?
  38. Inclusion of an oscilloscope on tester
  39. 6V6SE - Suggestions?
  40. Heretical Line Stage: BOM?
  41. Tube amp to drive 4 ohm headphones?
  42. Another TVA1 - KT88 power amplifier
  43. 845 parafeed
  44. datasheet 6P44C
  45. ecc85 tube buffer or line stage?
  46. Valvestate 8080 That's been dog Peed...
  47. pre war gibson eh125 schematic question
  48. "An elegant full function tube preamp mated to 1st rate SS power amp"
  49. How to select a good Hifi 12AX7 tube?
  50. LTP with CCS and negative PS
  51. Odd phase splitter
  52. Yet Another Hybrid Amplifier
  53. what Lundahl OPT for headphone 2A3 amp? (for HD800)
  54. Heater to Cathode voltage e88cc
  55. ASR-433
  56. Marantz 8B phase splitter
  57. Silvertone 1485 - Output Transformer advice
  58. Bob Latino ST120 Down
  59. SS phase splitters?
  60. Supply Filtering and why Capacitance Multipliers are NOT the Answer
  61. SE 6L6 to KT88
  62. HT power supply design
  63. Good tubes for concertina - 4P1L maybe?
  64. Powr supply question
  65. What is wrong with this Amplifier?
  66. Palmer DREI - Three SE Output Tubes Together?
  67. Heathkit TC-2 Checker and KT88s
  68. my Dummy Amp Contraption
  69. HF Oscillation Heat-Up Spk's Magnet!?
  70. Triode calculations
  71. Western Electric 131
  72. Electrolytic vs. Film 2A3 Cathode Bypass?
  73. Sylvania JAN 6SN7WGTA, late 1970's
  74. TV7 tester problem with 6CB5A tube
  75. Stromberg-Carlson AP-55
  76. SHUGUANG 2A3
  77. Circuit breaker help.
  78. Recommend me a bookshelf speaker for 5W
  79. Monarch STA 100X weird?
  80. 1954 US Army "Sound Repeater" amplifier
  81. 6N7...this configuration work ?
  82. RIAA Active EQ
  83. Direct Coupled E-Linear Amp
  84. Double Triode Mu
  85. Music Angel kt88 new pcbs problem
  86. EL503 replacement?
  87. Reducing gain in a SRPP circuit with ECC82?
  88. 12XX7 Triodes
  89. Output Tx just for interest
  90. Valab in Taiwan output transformers
  91. Impedance Question
  92. How to include a dual triode tube in a KiCAD schematic?
  93. 12U7 SPICE Model
  94. Phono Stage Woofer Bounce
  95. Problem with new L3-3 please help!
  96. Edcor output transformer...very nice !!!
  97. SE Hybrid Amp "The Lunatic one"
  98. Marantz 8b power transformer B+ down 30%
  99. Single or paralell trafo?
  100. CJ PV 5 Impedance?
  101. ECF80 driving EL84 PP
  102. Luhdahl LL1660S what current rating for D3a driver?
  103. what's that cap?
  104. SE EL84 Component placement Suggestion
  105. How to make a cheap 6N3 Buffer Amp even better?
  106. buying Tube Amps need advice/opinions
  107. Best driver and Power 6V6 By Officina
  108. dynaco pas3
  109. 5U4GB full-wave bridge, stumped
  110. Complete Module Driver and Power with DHT 6B4G
  111. HELP NEEDED for a 6CA4/EZ81 power supply
  112. OT for 2A3 PSE w/Parafeed
  113. More Dynaco Mark VI Questions
  114. curious feedback in circuit of Pioneer SM-Q300 receiver
  115. Hytron 2E25 - Other forgotten and marvelous tube !
  116. need tube upgrade advice please sir
  117. buyer beware
  118. Analog tube for DAC & Power supply with valve EZ_80
  119. JJ 5y3S pin 1??
  120. My first Sansui AU-111 Rebuild
  121. Capacitor-induced distortion
  122. Elevating Heater Voltage with multiple Transformer Heater Secondaries
  123. Common Cathode as DAC output
  124. Pre-Amp with russian tubes 1j24b
  125. How to calculate, the output impedance of a tube with grounded grid
  126. How To Draw Load Line With Output Transformer ?
  127. Inter electrode capacitance.
  128. My amp is an oscillator !
  129. TESLA PL509
  130. What value for Va ?
  131. Help selecting an input transformer ?
  132. Should same valves grid voltage vary much ?
  133. Driver options for 300B-XLS (4P1L-IS-4P1L-IS)
  134. Restoring a Scott 299-B
  135. Latest project, 80 watt valve amplifier
  136. PP Amp Doubling Output Power
  137. Setting up a Wilson current mirror as a differential load
  138. interested in tube amps
  139. Baldwin 45P amp project
  140. DIYGene's Jadis JP-200 Preamp Kit
  141. Need design/schematic for 6H30P driven 6C33C SET
  142. Substitute 6AQ8 for my 6CG7's
  143. 6bq5 tubes in a Heathkit AA-151
  144. Marantz 8b restoration: colour code, prints, schematics
  145. Show me your screen drive circuits
  146. Potting Compounds
  147. Chokes in the ground "plane"
  148. OTL idea
  149. Balance control tip for newbee's
  150. Ebay win - is this any good?
  151. 6sn7 pse amp for altec lansing 604E
  152. "Cockeyed Bridge" with damper diode?
  153. Mac 2100 Hybrid
  154. Single-Stage Hybrid Cascode Power Amp
  155. New to Tube amps, heathkit question
  156. 6AS7 OTL PL build
  157. On Bootstrapping diodes for UL G2 MOSFET
  158. Chasing Aikido "hum"
  159. valve monobloc designs
  160. 7A5 is a good driver for the 300B ?
  161. Parallel Push Pull 6V6 design
  162. Black cat caps?
  163. Soundstage
  164. Brains & Brawn CF : where's the catch ?
  165. ISO-TANGO to quit
  166. Shifting reflective loads using secondary taps?
  167. VTL -- 20 6550's a side and their xfmrs
  168. "Diamond" tube preamp with 12au7
  169. Wich factory made this tube ?
  170. Bootstrapped Cathode Coupled Amplifier
  171. OTL 6AS7
  172. Diode performance testing
  173. Monacor SA-10
  174. Volume Control Hum
  175. Stromberg-Carlson AP-50
  176. 5 wire and 3 wire output transformer change ?
  177. Yaqin mc 10L
  178. Can OTL Ciclotron amp use solid state regulated PS?
  179. Cross-channel overtalk with strange effects
  180. Why 6.3V?
  181. KT88 Williamson Design Questions
  182. Winding a center-tap secondary
  183. HV delay switch
  184. McIntosh MC-30...Balanced Input Feasible?
  185. Designing line driver / pre-amp
  186. Bucking and boosting a tube power transformer
  187. 33A-158M
  188. All DHT integrated amp
  189. 6N1P
  190. basic query - Pete Millett 807 board.
  191. Tube Tester with undocumented tubes
  192. "Fritz" the Boston/RI tube guy - ANYONE know what became of him??
  193. EI yugoslavia gone forever.
  194. Quicksilver 8417 Design - Stay with it or modify?
  195. Looking for some advice on odd preamp noise issue
  196. Tubes in an opamp feedback loop ?
  197. Jensen P-P Cathode Follower
  198. Cathode follower rigorous definition.
  199. Little Bear P3 ?!?! opinions ?
  200. NOS GU-81
  201. OPT endbell color!
  202. Music Angel kt88 with unbalanced output.. help me!
  203. Heater Supply Center Tap
  204. SCA-35 Pot noise
  205. Conrad Johnson MV 55
  206. Comments on 6C33C-B ARG OTL
  207. Construction tips for high voltage amps.
  208. 6L6 bias
  209. came across Mingda Tube king mono blocks
  210. a lot of noise
  211. El84 pp Amp problem
  212. Power on filament current surge question
  213. Its likely a repost but W/e
  214. Scored some 8236's....
  215. What causes valve to glow red inside ?
  216. Tubes and radioisotope decay
  217. PSUDII Question
  218. DIY Bias Buddy
  219. Recommend me a high power OPT
  220. Design Shorting Tubes?
  221. Microsoft Tube Amp and Speakers
  222. S5 K-16LS Tone Control - Help Please
  223. SEUL Circuit for PL519, has anyone here built this?
  224. Motorola three channel
  225. Your own builders book
  226. WE91A - high frequency roll off
  227. Dynaco MarkIII dimensions
  228. Leak TL12+ smoothing capacitors.
  229. Crate Palomino V8 potentiometer replacement
  230. Question about failing 6550 output
  231. Need help converting Ampex 960 R2R to a preamp...
  232. 5751 SPICE Model -- for Poddwatt II
  233. Configuring an Audio Transformer for 8 Ohmsuring
  234. OTL Blocking cap / RC filter
  235. What do you think..OP Tx
  236. Does anyone have GA399MA.pdf?
  237. New Amp Build, First Post
  238. Twisting HV leads
  239. Phono MC/MM Stage like Audio Space Reference Two RIAA Section
  240. Help with AVO MK IV Meter
  241. Why use a pentode?
  242. Filter choke temperature concerns
  243. Is my output transformer damaged?
  244. Parafeed without a cap
  245. Edcor Transformer Problems
  246. From The Daft Idea Department
  247. Do I need a resistor between plates? pic included.
  248. Tube preamp overheating characteristics?
  249. Valve amplifier sounds great
  250. volume pot hum at low and high volume

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