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  1. 65 Princeton reissue trem circuit
  2. Run indicator / power-light off of rectifier tube 5vac ?
  3. speaker impedence question
  4. Push/Pull Pair Removal Theory & Questions
  5. Symmetry vs. Asymmetry
  6. MOSFET Vibro Champ Vibrato
  7. Self-Biasing
  8. understanding unintended/unwanted oscillation in guitar amps.
  9. Cathode follower voltage question 6SL7
  10. Rectifier tube voltage drop
  11. bucking transformer rating
  12. Speaker Cabinet design: Interpreting Thiele-Small data, using sofware, and tuning
  13. Dark sounding tubes?
  14. Overcoming interaction between control settings in FMV tone stack
  15. Output Transformer Saturation Surpise
  16. understanding why 2 Fender AB763 preamp circuits "out of phase" with each other.
  17. One other question about B+ resistors
  18. Question about voltage dop in a power supply
  19. Cathode Follower in Single Ended Amp?
  20. Tales of unexpected hum sources: Thomas Vox Amps
  21. SS vs Tube Reverb Driver and Recovery. Preferences?
  22. Chuck H's Zener bias mod
  23. Taming EF86 Tube Circuit - Reducing bottom end?
  24. tube rect/ss rect circuit
  25. What do these two parallel reverse polarity diodes do?
  26. About the Dual Terror
  27. 1N4007 quandry
  28. Jfet matching
  29. PT and tube limitations
  30. Capacitor ESR, how much is too much?
  31. Moving Master Volume In A Ceriatone Chupacabra For Effects Loop Installation
  32. Issue with a Clone Hybrid Hiwatt/Ampeg
  33. cathode bypass and grid stoppers/ when where and why
  34. what does this input resistor do?
  35. Matching EL34s in triode vs pentode modes
  36. What are the threads in with the center conductor of some audio cabling?
  37. Relay issue
  38. Input Capacitor??
  39. Interstage transformer
  40. Choosig resistors thoughts anyone
  41. Where does the gain stage end??
  42. Phase at frequency w/speaker emulator circuit (Juan?)
  43. My tube amps sound better the longer they're on..
  44. OT placement too
  45. Mesa Dual Rectifier PSU Film cap
  46. EL84 PP Class B power stage
  47. JJ 6V6s spice model
  48. DIY attenuator
  49. How to calculate primary impedance of output transistor for class AB push pull stage?
  50. OT arrangement on chassis
  51. How does this Marshall Hi/Lo power switch work?
  52. Fender Champ Power Output Rating
  53. Adding a presence control to a Deluxe AB763 type circuit that didn't have one
  54. Mojotone 5f6a discrepancies......
  55. ripple question
  56. blackface PI cap question
  57. Need help with a technical question, please
  58. New Build PT help
  59. switches and voltage ratings
  60. Understanding Frequency Response Specs
  61. speaker recomandation
  62. Relay supply
  63. Need a maths refresher for RLC circuit scaling (reactive load stuff)
  64. Why not replace the "death" capacitor with a "Y" Safety capacitor?
  65. Leaky coupling caps, local feedback in preamp
  66. What is Zinky Thinking?
  67. Hammond's Vibro-King PT has an Odd current rating
  68. Naylor Super Drive 60 amp
  69. Comparing the Nonlinearity of a Triode and a Bipolar Junction Transistor
  70. Comparing the Nonlinearity of a Triode and a Junction FET
  71. tone stack placement
  72. ripple rejection
  73. Simple PT rating question
  74. OT impedance and break up relationship
  75. Output transformer rating
  76. 6G2 Princeton Tremolo?
  77. ampeg b15 inverter
  78. b15
  79. Shared cathode bypass
  80. understanding fet noise curves
  81. Trace Elliot GP7 AH150 Power Amp Question
  82. OT question
  83. Run a 6ca4 rectifier on a 5v/2a wind?
  84. Difference between 2 x EL84 and 4 x EL84 board architecture?
  85. errors in The Ultimate Tone by K. O'Connor
  86. speaker break in transformer question
  87. Screen Bypass Caps
  88. Kt88 triode strapped
  89. Coupling cap values
  90. sidebands
  91. Why All of the Aggressive Bandpass Filtration in New Amps?
  92. Questions about PT loading on a Conn Repurposed PT
  93. Marshall PI Bias Feed Resistors
  94. Conductive fiber board, does location matter?
  95. material inside tranny bell covers?
  96. How old is too old?
  97. Choosing cathode bypass values
  98. 1 ohm cathode resistors
  99. Gain stage triode questions
  100. yet another reactive dummy load thread
  101. hunting for a 5e3 in a DR
  102. Well, maybe tit is a good to look at the properties of this signal...
  103. Well, maybe tit is a good to look at the properties of this signal...
  104. Specifying Transformer For Half-Wave Rectification
  105. electrolytic caps testing
  106. V1 Input: Grid Leak and Grid Stopper
  107. HT winding center tap question.
  108. Hotrod deluxe PT
  109. Marshall 1959 SL100 (4 x EL34) Grid leak resistor size
  110. Widowmaker Amps & Isolation Transformers
  111. Fixed to Cathode Bias On The Fly
  112. Sticking a BF Princeton and a 5E3 in a Champ Chassis. Sort of.
  113. Getting double the power out of your power transformer
  114. Adding a mid control to the Boss FA-1 Preamp schematic...
  115. Simulated Log/Audio potentiometers: a bad idea
  116. Help Me Understand the LM386 Chip Amp
  117. What's This Cap For?
  118. Hoping to get some advice/proofing on output stage design and layout.
  119. Cathode input gain stage?
  120. 5V to 200V DC to DC converter
  121. MOSFET Attenuator?
  122. Plotting Push Pull Comosite Plate Curves
  123. 6L6 pp triode mode
  124. 5E3 Deluxe Point-to-Point Layout
  125. 6V6 Push Pull, Cathodyne Phase Inverter, 1/2 12ax7 Temolo - bias/voltage swing?
  126. Tube breadboard sockets
  127. 1 Watt Single-Ended Output Stage
  128. Single Ended EL84 tube amp plate voltage thoughts...
  129. Output Z
  130. 8 ohm speaker in 4 ohm SS amp?
  131. Floating ground dual class amplification A + B/C/D/etc...
  132. Noise-free decoupled power supply
  133. Old presence circuits vs new standards vs alternatives
  134. function/purpose of capacitor from anode to cathode
  135. OC3 Tube Voltage RegulatorTo Drop Voltage To EL37 Screen Grids
  136. Explain how this dual foot switch circuit works please
  137. Filmosound guitar amp conversion
  138. Marshall 'presence' control, why not on similar era Fenders?
  139. 6l6 to el34 tube swap?
  140. Beseler 45-S
  141. watt to volt conversion question
  142. Buck/boost? Yes or No?
  143. Jfet biasing - hiss
  144. Solid state current limiters instead of screen resistors
  145. Concerned about some readings I took on my transformer.
  146. Using foreign 100v mains transformers for builds in the USA?
  147. Using series resistors in the secondary to affect Power Supply Dynamics
  148. Recommend book on IC
  149. limiter design
  150. One single triode as a PI for rack/stomp tube preamps
  151. Vox AC50CPH Presence Control?
  152. Phase Inverters with CCS
  153. AB763 Single Channel Question
  154. Optimizing input stage for low noise
  155. WHy this PI design?
  156. Which power transformer ?
  157. Zener diode
  158. Please Check My Filter Theory
  159. GZ34 vs 2 x triple solid state diodes (fender amps)
  160. Help needed determining which reverb tank for an amp.
  161. driver biasing question
  162. Mixed auto/fixed bias in amp
  163. Phase angle switch for limiting inrush current?
  164. Fender Deluxe AB763 design flaw? Or better tubes available back then?
  165. 12ax7 gain
  166. Using 6V6's in a 6L6 circuit
  167. mosfet follies - cathode follower
  168. startup glowing
  169. Help with Paraphase + Tremolo
  170. The Vibro-Wreck
  171. frequency step network
  172. MOSFET LTPI
  173. Heat Sink Design
  174. Drop in digital reverb for a Silvertone 1484
  175. Split 2 signals, micing a head or combo to PA but have it direct to InEars.
  176. OD stage development
  177. Short-term Cap Overvoltage?
  178. SE El84 amp how to get the 'right kind' of distortion and a good clean tone ?
  179. Fender Blackface/Silverface Tube Amps' Volume Drop-Off at ~3--Why?
  180. Remote A/B switch
  181. Ec Tremolux design musings
  182. Preamp output impedance question
  183. Running a Twin Reverb on two output tubes
  184. TL072 spring reverb in a Fender amp
  185. Class AB amp Question - one tube loses input signal, other tube overheats??
  186. Identify Flea Market Amp
  187. Bipolar power supply question
  188. Power transformer grounding
  189. ZVS boost converter for tube PSU?
  190. Modular tube preamp idea, crazy?
  191. Design considerations for Vox choke choice
  192. 30+ watt amp the size of a pedal!
  193. 5F11 current question
  194. AB763 channels out of phase?
  195. CR Filter Theory Question
  196. How the TMB Tone Stack Works Webpage
  197. Aiken's back biasing circuit....has anyone tried it?
  198. 120VAC Ground
  199. Switch on coupling cap?
  200. Dumb negative feedback questions
  201. modified tube reverb unit idea. doable?
  202. Separate bias voltage
  203. Power supply design sanity check please...
  204. Learning a thing or two! WARNING! Forecast: WINDY
  205. Switching a preamp tube
  206. Phase Inverter Clipping
  207. Connection from input jack to V1
  208. High Gain - Cold Bias
  209. Quick Power Transformer Mounting Question
  210. Sans Choke Smoothing
  211. Drive voltage vs. bias voltage
  212. They're back
  213. Amp into open load at idle?
  214. Hiwatts..
  215. What's happens to the PT when I turn my amp up?
  216. EF86 vs ECC83
  217. Tek 575 curve tracer, should I grab it?
  218. PreAmp volume location
  219. What Hammond chassis for Marshall build ?
  220. On-Board Reverb in Parallel
  221. Fuse and Protection
  222. CF
  223. Analog Circuit Design - vol 1-3 by Jim Williams
  224. On a SF Fender Champ build I posted before. Question about math.
  225. Low power inline attenuator
  226. I'm confused about one thing on my SF Champ build.Hope some can shead some light.
  227. A fuse question
  228. I think I need to go back...
  229. Power supply filtering for ripple attenuation but also as HPF
  230. SS recipe for tube sound
  231. HUMMMMMM
  232. tube specs
  233. heater ct
  234. Preamp designs using a pentode stage
  235. Questions revolving one tube reverb circuit
  236. series heaters
  237. blackface deluxe reverb w/ paraphase inverter?
  238. About silicon wire
  239. Bridged-T vs Inductor in NFB loop?
  240. Experimenting around with a tweed era circuit
  241. Cathodyne PI: AC coupled vs DC coupled
  242. several tranny questions
  243. treble bleed with resistor
  244. Power tube loses bias at full output.
  245. Is this correct...
  246. MOV, Gas Discharge tube, or TVS Diode protection for output transformer??
  247. 18 watt B resistors
  248. Which bias? Chuck?
  249. external caps close to the power tubes. what's the optimum for the dry up effect?
  250. 18 watt EL84 to 6V6 help