SOLD One Channel drifts about 0.6V at the speaker outputs as the amplifier warms up. I was able to identify that one of the SemiSouth E120R100 mosfets was sensitive to temperature changes using a diagnostic “freeze” spray. I am the second owner of this differential F1J amp clone which I purchased as a backup amp several years ago and used it less than 10 hours total. The chassis gets HOT measuring 136F with the top cover off. Aluminum cover is included.
I added large potentiometers to be able to adjust DC offset to the speakers from the back. I have no schematics or diagrams for this F1J, however, there is a detailed schematic on the First Watt web site.
Amp is powered by a PLITRON 300VA toroid transformer with input of 2X115VAC and 2X18VAC outputs.
Asking $200obo plus shipping (25 pounds)
I added large potentiometers to be able to adjust DC offset to the speakers from the back. I have no schematics or diagrams for this F1J, however, there is a detailed schematic on the First Watt web site.
Amp is powered by a PLITRON 300VA toroid transformer with input of 2X115VAC and 2X18VAC outputs.
Asking $200obo plus shipping (25 pounds)
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Any idea shipping to 33172 ? I'm in Panama but give me shipping costs and I will purchase. My freight forwarder is in Doral Fl.
Haven't used the PM feature yet , I see you sent one . It has not arrived in my pm log yet , I will respond when it arrives .