[TenTec] Jupiter 538

ROLAND HOWELL snowy.howell at btinternet.com
Sat Feb 18 07:00:04 EST 2023


Further investigation on the PA devices fitted to the Jupiter, Q3/Q4 not 
sd1405 but MRF454S, drivers Q1/Q2 again not 2sc3133 but RD16HHFso the PA 
has been got at by previous owner, this is troubling somewhat.

FL2/FL3 have a white fur on the external surface, probably the same 
inside which is not good, have replacements on the way.

i have found a length of mini co-ax unsoldered at 1 end, it goes from 
term 19 on the power supply/ancillary board fitted to the back panel to 
PCB U7 but that end is disconnected, looking at the pins it seems to fit 
on RX-OUT, thats the 1 that has extra solder on it.

Thanks to Bob K4 for clarifying the output devices for me.

Snowy G0HZE


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