Maplin mosfet amplifier Members Profile. I experimented to find the cause, and found that the specified gate resistors were too low, after eliminating all other options. You could use this as a stand alone module for other amplifiers and is fully adjustable within reason of course . Programmable mains controller. It's the original 1983 version I built at college and has the original Hitachi K135/J48 mosfets on board. THE MAPLIN MAGAZINE U PROJECTS 1kW High Power Mosfet Amplifier This superb HP Mosfet amp is primarily aimed at use in halls, auditoriums or wherever the situation demands large scale audio amplification. ( Mosfet Amplifier (EMM Jun 81)) Please note , each kit is complete set of components with PCB to build one mono Power Amplifier ---- Two are required for Stereo plus you will need a transformer PSU - 48-0-48 volts Dc I Ah yes, apologies about crashing into your thread with my crazy ideas 🙂 I think the exuberance around the Maplin amp for me is memories of soldering my first two up, now in monoblock form, on my bedroom floor in the 1980s, probably when Nice to see others' referring to the old Powertran stuff (factory was on the Portway Ind Estate in Andover), I built and used a pair of their 2u 115w amps and also built their 2u 5 channel lighting do dah - i still have that 25 yrs later! I have a whole Powertran catalogue somewhere in my stash. The square, sine and triangle were perfect on the scope but DC offset is -106mV on both channels. 5 KB · Views: 367 lineup. nigelwright7557. ase shbp ssygebn ambm bvewkb csfv gexw nthcb xuiynnt rgnf tkhsb hkuhoz mbujir ftwdiy fkfpse