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  1. why is dc coupled better ?
  2. ARC grounding question
  3. Littles modifications of Triode Dick's KT88 MonoBill Classic
  4. New 6BG6G Amp
  5. Aesthetix Rhea Power Supply voltages
  6. Newbie - Broken Valve amp help!!
  7. New Build - Geraldine SE Amp
  8. Michaelson&Austin save attempt
  9. LTspice model needed....6JN6
  10. Big distortion of tube amplifier at high frequencies
  11. Radio Tubes Classifieds
  12. Sad and Lonely 6X4 Rectifier
  13. The Wild, Weird, World of GNF
  14. My first tube amp is here!!!
  15. Retro nixie volume indicator
  16. how to connect my corrent output DAC to my preamp TUBE?
  17. Roberts 770x / Akai M8 Tube Amplifier Question
  18. Conrad Johnson MV50 adjustment?
  19. Hum in console preamp after power supply rebuild
  20. Electrohome console amp?
  21. input impedance of mullard 3-3 amplifier....
  22. 6X4 Tube Rectifier Bridge
  23. can I use a zener for cathode bias
  24. Dual 5V winding 5AR4
  25. el84 test jig circuit
  26. anyone use knife switches for input selection???
  27. suggestions wanted for otl design
  28. Converting a single ended amp to parafeed
  29. Online stores for ordering Hitachi Metglas cores?
  30. Box of old tubes
  31. tube preamp
  32. bypassing balance control on VTL Deluxe
  33. Allegro II power amplifier
  34. ECF80 rating
  35. 71a pp parallel
  36. Hammond transformer 1627SEA
  37. Final schematic of my SET amplifier (drilling the chassis of my ex Boyuu china amp)
  38. Building Tube Amp DVD from Australia
  39. Tube preamp
  40. Bigger amp building help
  41. Balanced tube RIAA Preamplifier - Idea Search
  42. One tube brighter/hotter than the others
  43. HMV 2001 1953 record player circuit
  44. D3a - diode between screen & plate (triode) ?
  45. Radiotron/Eli Duttman phono change C1 to .00391?
  46. Mating Martin logan summits with VTL 125s has been a challenge
  47. Learning to Build A Tube Amplifier
  48. how to determine if an output transformer has blown?
  49. Secondary Emission Tetrode
  50. Monster Transformer Has Arrived
  51. wiring tubes in series
  52. Rogers E20a/Audio Note transformer
  53. PCL86 Amplifier
  54. Beard BB100 P35 project
  55. 6p15p
  56. help with paul hynes reg
  57. Vinyl Savor 6CB5A SE Amps?
  58. VTL Deluxe tube mystery
  59. My First SPUD Amp, 6EM7
  60. GK-71 SE amp
  61. 12ax7 Phono Preamplifier
  62. Aikido 6GM8 (ECC86) HPA or How I built a tube amp with non-scary voltages
  63. "Langham" Phase Inverter Origin?
  64. Adding "tube sound" via inline circuit
  65. Radford STA25 Renaissance - HELP!
  66. Capacitor across B+ and the input signal on the primary of the output transformer
  67. Zenith KPS-80 Rebuild
  68. 50+ watt diy tube amp recommedations
  69. Trouble with PSUD 2 high current / low voltage
  70. Magnavox 175 clone w/Fisher OPTs?
  71. First post here, need some help with PSU for amplifier
  72. Novice build of 6EM7 circuit. PSU advice.
  73. All DHT single-ended 211 amp suggestion?
  74. Adding inputs to Melody SP3 mk2
  75. Repurpose vertical output autoformer?
  76. Good ECL84 / 6DX8 Tube - Correct Pentode Spice Model Needed!!!
  77. Assistance with 211 powerdrive type design
  78. Passive pre for kt88 push pull
  79. Current production tubes testing used/low out of the box?
  80. Safe to use bare (laquered) copper wire for heaters?
  81. 10W+10W EL34+ECC83 single-ended Class A Stereo amplifier Kit wlx
  82. Testing Volume Controls
  83. Rowe R-4359A Amplifier
  84. Converting pentode to triode
  85. Nuvistor heater current inrush question
  86. Stereo Pre-amp build issues
  87. Triode 843
  88. 12ax7 preamp tube for jolida 1501BRC
  89. Volume pot for tube preamp
  90. I finally won my fight to kill the hum, but not clear why
  91. HK A500 phono issues
  92. Parallel Damper Tubes for Voltage Doubler
  93. Good schematic (circuit) with tube 12ax7
  94. Potientiameter
  95. HH Scott 299C tube integrated amp channel B music comes on after 15 mins to 20 mins?
  96. transformer wiring
  97. Looking for help with my Emotive Audio ETA Amplifier
  98. Running tubes' filament on DC
  99. 6.3V Rectifiers and winding sharing?
  100. Audio colume controls / atternuators
  101. Determining output transformer turn ratio and impedance
  102. GM70 build startup
  103. Yukon Gold - a spud amp
  104. 310A (328A) triode curves
  105. Can anybody identify the manufacturer of this pcf80
  106. Need advice on Quad 22 repair
  107. 2P1P Russian tetrode
  108. Bogen MO-100 increase PS capacitor
  109. Does O-netics make SE OPTs?
  110. 1939 Rockola amp
  111. Yet another Aikido? NOVAL vs OCTAL
  112. Why are tube amp wattages low
  113. Vintage kt88 pp mod suggestions
  114. Balanced Bridge mode?
  115. Little Bear P5-1
  116. 10M45 power diss. w/ 6EM7 (12mA)
  117. Do we need this input resistor?
  118. Brimar thermionic products 2015
  119. 'Cheap' 2A3 P-P OPT
  120. Thoughts/?'s about gain stages and PI
  121. Remember the Ekco radios.
  122. Converting hybrid from ECC88 to 6N1P
  123. What is, --'Crosswalk'...?
  124. first time dyi help
  125. 500k potentiometer to 100k - okay?
  126. B&K 707 Chart for Russian Tubes
  127. rca transformer output
  128. Western Electric 300B tubes
  129. Interstage transformer crosswalk help
  130. DC coupled MOSFET drivers for output stage - simple questions
  131. 813 PP Audio Amp Help
  132. Bargain basement coupling caps
  133. TX 2575
  134. HK Citation II Negative Feedback question... how can I measure it?
  135. a little help with the aikido lv?
  136. Is it possible for a tube to not light up without any visual other indicators?
  137. Oversized OPTs
  138. How to calculate global NFB CAPACITOR. Is it needed?
  139. Simple driver for positive grid tubes
  140. Surplus for tubes in NY and Miami
  141. Lux CL-35 tone control simulation issue
  142. Stereo SE in Parallel?
  143. 6AR6: A new tube to play with
  144. Time for another dumb question
  145. CBS 12AU7?
  146. SE UL 6V6 GT
  147. RCA output transformer part # 246860
  148. 801A Battery Bias
  149. Acoustat Servo Amps
  150. how to connect output transformers??
  151. Tube Amp Power transformer getting Hot...dumb question
  152. Where to get tubes for DCPP build?
  153. Pro and Cons to use 4 ohm tap for Global Feedback instead of 8 ohm tap
  154. Any quality Chinese tube amps?
  155. 6V6 Single Ended question
  156. C. Follower w/- active load
  157. Bias adjustment in Stereo Power Amp with 4 x EL34
  158. All Tube MC Phono Head Amp
  159. Marantz 7 Tube pre-amplifier PCB Board Design
  160. Miller capacitance
  161. Regarding pin 1 & pin 8 EL34
  162. Better place for noise to put the Global Feedback resistor
  163. Change 12AY7 to 12AX7 Tube. Waht new settings?
  164. Bogen MO-100: Series and blown power transformer
  165. Tung Sol Reissue 6550 Ratings/ Reliability
  166. How do I calculate shunt resistor value in a heater series string
  167. Mikael Abdellah KT88 tweak
  168. 845 tube biasing strangly
  169. Which phono should I pick?
  170. Combination of Philips en Psvane tubes EL34
  171. 388A datasheet
  172. Build diary - Ciuffoli all triode OTL
  173. porta fi modification help please
  174. Help me ID 6SN7 GTB Baldwin
  175. Some help with output transformers induced hum
  176. Improved Mullard circuit
  177. Output Transformer Saturation, Impedance Load Curve...
  178. HK Citation II - strange issues
  179. Combination of PCB and point to point wiring a bad idea?
  180. Sound Valves M60 red plated badly please help?
  181. Old tube Radio Conversion
  182. I need something that will take place of a 5965
  183. Mu Follower Analysis
  184. Looking for advice on selling an expensive tube (WE 274A)
  185. 6EM7 SET Amplifier
  186. El84-6BQ5... NOT!!!! just a lookalike!
  187. How to modify the Little Bear P8 preamp to become an amp?
  188. Differential Shunt Cascode Driver
  189. Where do I put the resistor?
  190. been laying low - revisiting a KT88 partial FB amp
  191. SET Rebuild (Fixed Bias and Rod Coleman DHT Regulators)
  192. ATTN Sy: Why gold grids 2
  193. "el escorpion" line stage, plus 10W B+ flyback supply & mute circuit
  194. Cathode Follower config for Tube DI
  195. Replacing capacitors in a VTL300 power amp
  196. how do I connect a plate amp for subwoofer to tube amp
  197. 6sn7 why the soft clipping.
  198. Yes we need Tone Controls! An outstanding project from 1962
  199. counterpoint sa4 otl
  200. Eico ST40 Kit
  201. Audio output transformer
  202. Thoughts on this schematic actually working.
  203. PSUD2 on Mac
  204. I am completely new to tubes.
  205. 2C50 Preamp Schematic
  206. Yet another RH84
  207. Example of Anode Follower (plate follower) with volume ctrl?
  208. Beginner DIY Amp
  209. EF86 Grid/anode triode question.
  210. Citation II... can't get enough bias!
  211. Auto Radio Tubes
  212. 4 edition valve amplifiers (in London)
  213. Need Help With Screen Switch
  214. Output transformer help
  215. High end car project- looking for advice
  216. I hate wiring amps!
  217. Silicone tube rings
  218. Quad Audio Digital Potentiometer for Tube Preamp
  219. Looking for grounded grid preamp schematic that use only 12ax7/420a
  220. Someone, please check my plot.
  221. Selecting output transformer for OTL headphone amp
  222. RCA tube preamplifier help
  223. Flickering knocking sound on a push pull EL34 configuration.
  224. Tubes headphone amplifier
  225. Custom tube amplifier builders
  226. New to valve cheap pre-amp tweak help please?
  227. ARC SP-3A-1 Tube Opinions
  228. Has anyone tried a "12AU7 to 6SN7 Adapter"?
  229. 300b filament on pb accumulator
  230. 2K2M Tubes...any use?
  231. GK-71 SE or PP?
  232. 6HV5 / CCS - driver project
  233. Getting 60W from 6C33C pushpull
  234. Phono Pre - Chassis layout
  235. Heyco strain relief pliers
  236. RH84 and Electron stream question.
  237. 845 amp.. Now I've got a faint hum..
  238. "Lisa trafo" transformer builder
  239. KT-90 odd behavior
  240. ecc99-2a3
  241. 6SJ7 gain setup
  242. Prototype for 2X 20 Triode
  243. 6n1p preamp schematic
  244. PSU Choke - Valve Phono Pre project
  245. LND150 gyrator for ECC83/12AX7 ???
  246. GU-48 Tube amplifier 833A
  247. OTL with custom 64ohm speakers... Idea in the making
  248. Snap, Crackle, Pop!
  249. What normally causes buzzing?
  250. 690R:8R output transformer

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