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  1. Aesthetix Rhea Power Supply voltages
  2. Newbie - Broken Valve amp help!!
  3. New Build - Geraldine SE Amp
  4. Michaelson&Austin save attempt
  5. LTspice model needed....6JN6
  6. Big distortion of tube amplifier at high frequencies
  7. Radio Tubes Classifieds
  8. Sad and Lonely 6X4 Rectifier
  9. The Wild, Weird, World of GNF
  10. My first tube amp is here!!!
  11. Retro nixie volume indicator
  12. how to connect my corrent output DAC to my preamp TUBE?
  13. Roberts 770x / Akai M8 Tube Amplifier Question
  14. Conrad Johnson MV50 adjustment?
  15. Hum in console preamp after power supply rebuild
  16. Electrohome console amp?
  17. input impedance of mullard 3-3 amplifier....
  18. 6X4 Tube Rectifier Bridge
  19. can I use a zener for cathode bias
  20. Dual 5V winding 5AR4
  21. el84 test jig circuit
  22. suggestions wanted for otl design
  23. Converting a single ended amp to parafeed
  24. Online stores for ordering Hitachi Metglas cores?
  25. Box of old tubes
  26. tube preamp
  27. bypassing balance control on VTL Deluxe
  28. Allegro II power amplifier
  29. ECF80 rating
  30. 71a pp parallel
  31. Hammond transformer 1627SEA
  32. Final schematic of my SET amplifier (drilling the chassis of my ex Boyuu china amp)
  33. Building Tube Amp DVD from Australia
  34. Tube preamp
  35. Bigger amp building help
  36. Balanced tube RIAA Preamplifier - Idea Search
  37. One tube brighter/hotter than the others
  38. HMV 2001 1953 record player circuit
  39. D3a - diode between screen & plate (triode) ?
  40. Radiotron/Eli Duttman phono change C1 to .00391?
  41. Mating Martin logan summits with VTL 125s has been a challenge
  42. Learning to Build A Tube Amplifier
  43. how to determine if an output transformer has blown?
  44. Secondary Emission Tetrode
  45. Monster Transformer Has Arrived
  46. wiring tubes in series
  47. Rogers E20a/Audio Note transformer
  48. PCL86 Amplifier
  49. Beard BB100 P35 project
  50. 6p15p
  51. help with paul hynes reg
  52. Vinyl Savor 6CB5A SE Amps?
  53. VTL Deluxe tube mystery
  54. My First SPUD Amp, 6EM7
  55. GK-71 SE amp
  56. 12ax7 Phono Preamplifier
  57. Aikido 6GM8 (ECC86) HPA or How I built a tube amp with non-scary voltages
  58. "Langham" Phase Inverter Origin?
  59. Adding "tube sound" via inline circuit
  60. Radford STA25 Renaissance - HELP!
  61. Capacitor across B+ and the input signal on the primary of the output transformer
  62. Zenith KPS-80 Rebuild
  63. 50+ watt diy tube amp recommedations
  64. Trouble with PSUD 2 high current / low voltage
  65. Magnavox 175 clone w/Fisher OPTs?
  66. First post here, need some help with PSU for amplifier
  67. Novice build of 6EM7 circuit. PSU advice.
  68. All DHT single-ended 211 amp suggestion?
  69. Adding inputs to Melody SP3 mk2
  70. Repurpose vertical output autoformer?
  71. Good ECL84 / 6DX8 Tube - Correct Pentode Spice Model Needed!!!
  72. Assistance with 211 powerdrive type design
  73. Passive pre for kt88 push pull
  74. Current production tubes testing used/low out of the box?
  75. Safe to use bare (laquered) copper wire for heaters?
  76. 10W+10W EL34+ECC83 single-ended Class A Stereo amplifier Kit wlx
  77. Testing Volume Controls
  78. Rowe R-4359A Amplifier
  79. Converting pentode to triode
  80. Nuvistor heater current inrush question
  81. Stereo Pre-amp build issues
  82. Triode 843
  83. 12ax7 preamp tube for jolida 1501BRC
  84. Volume pot for tube preamp
  85. I finally won my fight to kill the hum, but not clear why
  86. HK A500 phono issues
  87. Parallel Damper Tubes for Voltage Doubler
  88. Good schematic (circuit) with tube 12ax7
  89. Potientiameter
  90. HH Scott 299C tube integrated amp channel B music comes on after 15 mins to 20 mins?
  91. transformer wiring
  92. Looking for help with my Emotive Audio ETA Amplifier
  93. Running tubes' filament on DC
  94. 6.3V Rectifiers and winding sharing?
  95. Audio colume controls / atternuators
  96. Determining output transformer turn ratio and impedance
  97. GM70 build startup
  98. Yukon Gold - a spud amp
  99. 310A (328A) triode curves
  100. Can anybody identify the manufacturer of this pcf80
  101. Need advice on Quad 22 repair
  102. 2P1P Russian tetrode
  103. Bogen MO-100 increase PS capacitor
  104. Does O-netics make SE OPTs?
  105. 1939 Rockola amp
  106. Yet another Aikido? NOVAL vs OCTAL
  107. Why are tube amp wattages low
  108. Vintage kt88 pp mod suggestions
  109. Balanced Bridge mode?
  110. Little Bear P5-1
  111. 10M45 power diss. w/ 6EM7 (12mA)
  112. Do we need this input resistor?
  113. Brimar thermionic products 2015
  114. 'Cheap' 2A3 P-P OPT
  115. Thoughts/?'s about gain stages and PI
  116. Remember the Ekco radios.
  117. Converting hybrid from ECC88 to 6N1P
  118. What is, --'Crosswalk'...?
  119. first time dyi help
  120. 500k potentiometer to 100k - okay?
  121. B&K 707 Chart for Russian Tubes
  122. rca transformer output
  123. Western Electric 300B tubes
  124. Interstage transformer crosswalk help
  125. DC coupled MOSFET drivers for output stage - simple questions
  126. 813 PP Audio Amp Help
  127. TX 2575
  128. HK Citation II Negative Feedback question... how can I measure it?
  129. a little help with the aikido lv?
  130. Is it possible for a tube to not light up without any visual other indicators?
  131. Oversized OPTs
  132. How to calculate global NFB CAPACITOR. Is it needed?
  133. Simple driver for positive grid tubes
  134. Surplus for tubes in NY and Miami
  135. Lux CL-35 tone control simulation issue
  136. Stereo SE in Parallel?
  137. 6AR6: A new tube to play with
  138. Time for another dumb question
  139. CBS 12AU7?
  140. SE UL 6V6 GT
  141. RCA output transformer part # 246860
  142. 801A Battery Bias
  143. Acoustat Servo Amps
  144. how to connect output transformers??
  145. Tube Amp Power transformer getting Hot...dumb question
  146. Where to get tubes for DCPP build?
  147. Pro and Cons to use 4 ohm tap for Global Feedback instead of 8 ohm tap
  148. Any quality Chinese tube amps?
  149. 6V6 Single Ended question
  150. C. Follower w/- active load
  151. Bias adjustment in Stereo Power Amp with 4 x EL34
  152. All Tube MC Phono Head Amp
  153. Marantz 7 Tube pre-amplifier PCB Board Design
  154. Miller capacitance
  155. Regarding pin 1 & pin 8 EL34
  156. Better place for noise to put the Global Feedback resistor
  157. Change 12AY7 to 12AX7 Tube. Waht new settings?
  158. Bogen MO-100: Series and blown power transformer
  159. Tung Sol Reissue 6550 Ratings/ Reliability
  160. How do I calculate shunt resistor value in a heater series string
  161. Mikael Abdellah KT88 tweak
  162. 845 tube biasing strangly
  163. Which phono should I pick?
  164. Combination of Philips en Psvane tubes EL34
  165. 388A datasheet
  166. Build diary - Ciuffoli all triode OTL
  167. porta fi modification help please
  168. Help me ID 6SN7 GTB Baldwin
  169. Some help with output transformers induced hum
  170. Improved Mullard circuit
  171. Output Transformer Saturation, Impedance Load Curve...
  172. HK Citation II - strange issues
  173. Combination of PCB and point to point wiring a bad idea?
  174. Sound Valves M60 red plated badly please help?
  175. Old tube Radio Conversion
  176. I need something that will take place of a 5965
  177. Mu Follower Analysis
  178. Looking for advice on selling an expensive tube (WE 274A)
  179. 6EM7 SET Amplifier
  180. How to modify the Little Bear P8 preamp to become an amp?
  181. Differential Shunt Cascode Driver
  182. Where do I put the resistor?
  183. been laying low - revisiting a KT88 partial FB amp
  184. SET Rebuild (Fixed Bias and Rod Coleman DHT Regulators)
  185. ATTN Sy: Why gold grids 2
  186. "el escorpion" line stage, plus 10W B+ flyback supply & mute circuit
  187. Cathode Follower config for Tube DI
  188. Replacing capacitors in a VTL300 power amp
  189. how do I connect a plate amp for subwoofer to tube amp
  190. 6sn7 why the soft clipping.
  191. Yes we need Tone Controls! An outstanding project from 1962
  192. counterpoint sa4 otl
  193. Eico ST40 Kit
  194. Audio output transformer
  195. Thoughts on this schematic actually working.
  196. I am completely new to tubes.
  197. 2C50 Preamp Schematic
  198. Yet another RH84
  199. Example of Anode Follower (plate follower) with volume ctrl?
  200. Beginner DIY Amp
  201. EF86 Grid/anode triode question.
  202. Citation II... can't get enough bias!
  203. Auto Radio Tubes
  204. 4 edition valve amplifiers (in London)
  205. Need Help With Screen Switch
  206. Output transformer help
  207. High end car project- looking for advice
  208. Silicone tube rings
  209. Looking for grounded grid preamp schematic that use only 12ax7/420a
  210. Someone, please check my plot.
  211. Selecting output transformer for OTL headphone amp
  212. RCA tube preamplifier help
  213. Flickering knocking sound on a push pull EL34 configuration.
  214. Tubes headphone amplifier
  215. Custom tube amplifier builders
  216. New to valve cheap pre-amp tweak help please?
  217. ARC SP-3A-1 Tube Opinions
  218. Has anyone tried a "12AU7 to 6SN7 Adapter"?
  219. 300b filament on pb accumulator
  220. 2K2M Tubes...any use?
  221. GK-71 SE or PP?
  222. 6HV5 / CCS - driver project
  223. Getting 60W from 6C33C pushpull
  224. Phono Pre - Chassis layout
  225. RH84 and Electron stream question.
  226. 845 amp.. Now I've got a faint hum..
  227. "Lisa trafo" transformer builder
  228. KT-90 odd behavior
  229. ecc99-2a3
  230. 6SJ7 gain setup
  231. Prototype for 2X 20 Triode
  232. 6n1p preamp schematic
  233. PSU Choke - Valve Phono Pre project
  234. LND150 gyrator for ECC83/12AX7 ???
  235. GU-48 Tube amplifier 833A
  236. OTL with custom 64ohm speakers... Idea in the making
  237. Snap, Crackle, Pop!
  238. What normally causes buzzing?
  239. 690R:8R output transformer
  240. Redplate and Other Questions
  241. Tube wisdom...
  242. 01B thoriated tungsten filaments?
  243. Distortion/Low Signal/Noise from Ampex 620 after being on for 5 minutes?
  244. Max Plate (Boost + DC Supply), what does it mean
  245. It's been a while since I've been here...
  246. Quicksilver Silver Mono Mods
  247. Chinese, Single-Ended, Class A, Questions.
  248. Balanced Aikido Hum
  249. Pentode Tone Control Module
  250. Reason for no output reading and blown tube

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