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  1. How do I get USB input into a tube amp?
  2. Janus Shunt Regulator / Aikido Octal build
  3. 6SN7 or 12AU7 Tube preamp for Gainclone
  4. E-Linear, P-P pentode application
  5. 6n6p preamp. Does it look ok?
  6. www.grippeaz.com
  7. Capacitance value help
  8. 6C33 SVETLANA in 1979??
  9. FYI: MCM 555-7125 Transformer Info
  10. Anyone use 39/44 for audio?
  11. I think its about time for me to design my first Transformer tube amp..
  12. Q: EL84 PP - Bias switch, PS regulation
  13. Balanced to unbalanced converter solution with only one dual triode?
  14. ECL85 G1+G2 Driven Amp Concept - Worth Pursuing?
  15. What is this called? "Triode with active load"?
  16. Type 50 triode amp
  17. Chargecontroller for LIFePO4
  18. Triode strapped C3G
  19. Newbie looking for first tube project. Maggie 9308 or like suggestions?
  20. Poindexter's Musical Machine:Tube Power Supply Schematic
  21. SE EL34 cathode help ?
  22. How to add "Vu-Meters and "Subwoofer Out" to a tube amp...
  23. Audio Research D90... a HOT, buzzing amplifier
  24. Lundahl LL1670 grid choke -- One or two needed for push-pull?
  25. At this stage of my experience almost too afraid to ask
  26. Help with EM7 circuit
  27. Ceramic or plastic noval socket
  28. Need connection info for Thordarson 22S86
  29. Max voltage across microphone signal transformer.
  30. Harmon Kardon A500 Redux
  31. Schematic for 2A3/300B SET OTL amp
  32. Bias circuit for fixed bias
  33. Ultrapath with cathode bypass cap: which value of C is correct?
  34. Volume Control Tube Amp / Graaf Graafiti WFB one
  35. Pultec EGP-2 control pannel
  36. Emission values?
  37. Capacitor Upgrade for S5 Electronics (16LS)
  38. 'nipple' in waveform - What is it?
  39. High impedance speaker for SET OTL amps.
  40. Uneven output from LL1677
  41. Ugh. Need help with hum
  42. 6H16B plate follower output stage
  43. Tube preamp 30 gain design with 12ax7
  44. Operating points for 6n2p
  45. Sensing current in high voltage DHT circuits.
  46. Have you tested if two coupling capacitors in parallel are better than one sonically?
  47. DHT filament circuits - best wirewound resistors?
  48. Dual Pentode as two seperate Pentodes.
  49. Double "C" core OPT question
  50. EL34 pentode to triode feedback
  51. Chinese 7308?
  52. DC coupled circuits
  53. Need a complete amp kit for newbie
  54. Making a tube amp
  55. Tube amp diode question
  56. Michaelson Chronos
  57. Preamp question
  58. 6SJ7 and 6SC7 not on roll chart
  59. Graaf GM20 6C33
  60. Does Ultra-Linear SE reduce harmonic distortion?
  61. How to use a 3 prong plug with a Dynaco MkIII?
  62. 6e5-6e6 tube-operating point-absolute maximum rating
  63. LIFePO4 battery cathode bias
  64. Audible Illusions Modulus 3A CD input resistor values
  65. diode going into a tube rectifier
  66. Insulation for component leads in point to point wiring
  67. Advices on first tube amp
  68. 300B Tube Shootout
  69. Unison reasearch Mystery One
  70. 4P10C or 4Π10C tube, any member familiar with?
  71. Largest decoupling cap (DC block on signal path)
  72. Control Grid Feedback (as opposed to Cathode FB) and Miller Capacitance
  73. 211 / 845 ccs?
  74. Eimac 35T any good for an amplifier?
  75. What speaker impedance for a 5 ohm amplifier
  76. Almarro A318B SET Amplifier Simple Modifications For Improved Performance?
  77. Hammond interstage
  78. Bias Arrangement
  79. question about connecting my tube amp to a receiver
  80. Pentode screen bypass capacitor
  81. MINGDA MC845 AA schematics
  82. Faulty Output Transformer
  83. The makings of a nice SEP amp from an audio oscillator?
  84. Audio pot with tap
  85. tube amp and jbl crossover connection
  86. SE EL84 high screen and plate
  87. Marantz 7 line stage with DAC
  88. help with Ecc82/12AU7 selection
  89. Kt88's and 6SN7's?
  90. KR T-1610: What can I do with it?
  91. Simple voltage regulator
  92. Schematic
  93. Determining primary output load resistance...
  94. Warning about chokes by Toroidy
  95. Looking af new 845
  96. 807 Amplifier build.....Help Wanted
  97. Solid state power supply for tube amplifier.
  98. Power Transformer Rating Mythology?
  99. Claus Byrith 4-30 - HELP !
  100. LR8 as CCS for small tube cathode follower?
  101. TEKTRONIX 120-086 TRANSFORMER
  102. 01A question
  103. Determining input impedance
  104. Plate to cathode feedback
  105. Quick question about EL84 PSE
  106. P-SET EL34
  107. 6v6 Preamp Explorations
  108. Monoblock kits for $500
  109. Wanted/Needed Vaic Valve / KR 52B etc.
  110. Measuring Rp on the bench
  111. Clarifying RIAA calculations
  112. Emissions Labs 5U4G use statements
  113. Help me pick my first tube kit/winter project (tube preamp)
  114. Please explain feedback to an ignoramus
  115. Op-Amp/Power tube integration
  116. 12b4a preamp project
  117. Pot to Stepping and ohmic value change
  118. McIntosh MC2000
  119. universal high-gain pre-amp useful ?
  120. 6AX5, the forgotten rectifier?
  121. High gain pentode LTP?
  122. question with heater wiring
  123. Ideas for an hi-fi mono amplifier (and preamplifier)
  124. humm and buzz
  125. ECC88 For LTP
  126. Polam / Telam tubes !
  127. Question about grid input signal voltage
  128. Douk EL34 Amp kit
  129. ID help Please Hammond Amp
  130. rolling ecc88 into a 6cg7 socket
  131. Article Wanted - "High Quality Amplifier with the 6AS7G" by McProud
  132. capacitors
  133. Need a little WE 597A help
  134. Need to find - Triode Va=500V, Mu=20
  135. The Pomato, A hybrid can amp
  136. audio research sp16 phono no rec
  137. Recovered smoother Caps (to use or not)
  138. Effect of raising and lowering B+
  139. Ideas for tube amp EL34/ECC83 single ended
  140. The HiFi show 2015 UK
  141. Coupling capacitors
  142. Brook 12A
  143. Importance of plate voltage on overall performance
  144. Help Precision Fidelity M-7 amp
  145. And so it begins...
  146. What is the cream of the crop for DIY tubes kits?
  147. Amplifier Build - Suggestions
  148. 26DQ5 curves pin out
  149. Toroidal Transformer Upgrade for S5 Electronics K-16LS Kit
  150. VR tube RF issues
  151. usb and 3.5 to same pre
  152. Gain changing on 6n3 tube buffer
  153. Kelvin Capacitors
  154. simple question about on off switch
  155. Engineers Amp chassis
  156. First tube amp design, what are my mistakes?
  157. US 6L6GC identification
  158. PL508 triode curves, help !!!
  159. Multiple gain stages without continually increasing B+
  160. Choke and Capacitor input filters on a same winding?
  161. Any advice value for Volume control if....
  162. For tube lovers-Henry Wolcott Amplifiers from JBL PL100
  163. Help translate stamp mark on russian tube
  164. UK Engineers Amp (my first project)
  165. 12AX7 Heater pin 9
  166. Help With Translating Schematic
  167. Do diodes in the power section produce heat?
  168. you gotta laugh......really!!
  169. Dynachord Echocord S65 needs capacitors
  170. why is dc coupled better ?
  171. ARC grounding question
  172. Littles modifications of Triode Dick's KT88 MonoBill Classic
  173. New 6BG6G Amp
  174. Aesthetix Rhea Power Supply voltages
  175. Newbie - Broken Valve amp help!!
  176. New Build - Geraldine SE Amp
  177. Michaelson&Austin save attempt
  178. LTspice model needed....6JN6
  179. Big distortion of tube amplifier at high frequencies
  180. Radio Tubes Classifieds
  181. Sad and Lonely 6X4 Rectifier
  182. The Wild, Weird, World of GNF
  183. My first tube amp is here!!!
  184. Retro nixie volume indicator
  185. how to connect my corrent output DAC to my preamp TUBE?
  186. Roberts 770x / Akai M8 Tube Amplifier Question
  187. Conrad Johnson MV50 adjustment?
  188. Hum in console preamp after power supply rebuild
  189. Electrohome console amp?
  190. input impedance of mullard 3-3 amplifier....
  191. 6X4 Tube Rectifier Bridge
  192. can I use a zener for cathode bias
  193. Dual 5V winding 5AR4
  194. el84 test jig circuit
  195. anyone use knife switches for input selection???
  196. suggestions wanted for otl design
  197. Converting a single ended amp to parafeed
  198. Online stores for ordering Hitachi Metglas cores?
  199. Box of old tubes
  200. tube preamp
  201. bypassing balance control on VTL Deluxe
  202. Allegro II power amplifier
  203. ECF80 rating
  204. 71a pp parallel
  205. Hammond transformer 1627SEA
  206. Final schematic of my SET amplifier (drilling the chassis of my ex Boyuu china amp)
  207. Building Tube Amp DVD from Australia
  208. Tube preamp
  209. Bigger amp building help
  210. Balanced tube RIAA Preamplifier - Idea Search
  211. One tube brighter/hotter than the others
  212. HMV 2001 1953 record player circuit
  213. D3a - diode between screen & plate (triode) ?
  214. Radiotron/Eli Duttman phono change C1 to .00391?
  215. Mating Martin logan summits with VTL 125s has been a challenge
  216. Learning to Build A Tube Amplifier
  217. how to determine if an output transformer has blown?
  218. Secondary Emission Tetrode
  219. Monster Transformer Has Arrived
  220. wiring tubes in series
  221. Rogers E20a/Audio Note transformer
  222. PCL86 Amplifier
  223. Beard BB100 P35 project
  224. 6p15p
  225. help with paul hynes reg
  226. Aphex Tubessence 107 Mic Pre
  227. Vinyl Savor 6CB5A SE Amps?
  228. PSU RC filter vs. VR regulator tube
  229. VTL Deluxe tube mystery
  230. My First SPUD Amp, 6EM7
  231. GK-71 SE amp
  232. 12ax7 Phono Preamplifier
  233. Aikido 6GM8 (ECC86) HPA or How I built a tube amp with non-scary voltages
  234. "Langham" Phase Inverter Origin?
  235. Adding "tube sound" via inline circuit
  236. Radford STA25 Renaissance - HELP!
  237. Capacitor across B+ and the input signal on the primary of the output transformer
  238. Zenith KPS-80 Rebuild
  239. 50+ watt diy tube amp recommedations
  240. Trouble with PSUD 2 high current / low voltage
  241. Magnavox 175 clone w/Fisher OPTs?
  242. First post here, need some help with PSU for amplifier
  243. Novice build of 6EM7 circuit. PSU advice.
  244. All DHT single-ended 211 amp suggestion?
  245. Adding inputs to Melody SP3 mk2
  246. Repurpose vertical output autoformer?
  247. Power supply for tube preamp - Help!
  248. Good ECL84 / 6DX8 Tube - Correct Pentode Spice Model Needed!!!
  249. Assistance with 211 powerdrive type design
  250. Passive pre for kt88 push pull

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