WebMar 17, 2024 · The first is nearly complete, a MH4/REN904 MOSFET CCS loaded input, 6A5G SET output design using Lundahl iron (mid-build photo attached). I am now working on my second design. Nothing innovative, but at a high level, it is a MOSFET CCS loaded 6J5 input and MOSFET CCS loaded 45 parafeed output headphone amp. I am currently working … WebMar 30, 2024 · So a generic parafeed circuit like this, which is very similar to the Hagerman Tuba for example, or most other simple parafeed designs, can really make your cans come alive. I've attached the circuit I used for reference. One thing to watch out for is high frequency oscillations in tubes like this. Not what you want in headphones.
Kaiju 300B Amplifier Kit - Bottlehead
WebIn order to make it a parafeed circuit, one need only AC (capacitor) couple it to an output transformer. The transformer works to transform the high impedance, high voltage, and … http://tubelab.com/articles/ideas/single-ended-output-stages/ pahla b upper body strength
CCS Loaded Parafeed Output - Design Considerations? - Bottlehead
WebNone of my other tube amps - 2A3 Moondogs, WE91 300B monos / top level kit version from DIY Hifi Supply or my pimped Dynaco ST70 (Welborne Labs upgrade kit) - come even close to what this transformer coupled tungsten filament 801A is capable of. OK, especially the Dynaco and also the WE91 amps deliver more powerful bass with the above-mentioned ... WebApr 2, 2024 · #1 This is a thread about parafeed headphone tube amps. It's open for anyone and everyone to join in and add their experiences, experiments, tips and traps. The more … WebSep 6, 2024 · Here is the schematic, although it is not comprehensive. Parafeed capacitance was determined experimentally by taking FR sweeps of various capacitances (courtesy of cheap Solen caps), along with subjective listening impressions. Ultimately decided on 6.6uF made up of two 3.3uF in parallel. Bias points: 6J5 B+: 380V 6J5 plate to cathode: 200V pahla b walk off the weight day 17