SSB - Electronic SP-23 Preamp

Anthony Coldman

I have a SP23MKII mats head preamp, its not working.


I wonder if anyone has a circuit for it with the component value, I suspect one of the 2 Gas Fet, but unsure on what they are, they seem to be the same possible MGF1302 but not 100% sure.


Does anyone have any information that may help. Its quite an old unit so is there a better replacement device available now?


Regards Anthony G7LRQ

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