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Equivalent part number for rf board
Posted: Tue Jun 02, 2020 6:20 pm
by G1LWX
Hi
I am after an equivalent part number for the MIC5231-2.75YM as used
in the rf board.
The only place I can find one is Mouser or Digikey but for a one off is quite expensive.
Mike
Re: Equivalent part number for rf board
Posted: Tue Jun 02, 2020 7:35 pm
by G8GKQ
Mike - please remind me exactly which PCB it is used on?
Dave
Re: Equivalent part number for rf board
Posted: Tue Jun 02, 2020 8:03 pm
by G1LWX
Hi Dave
It's off the 4 Band RF output switch board for the Portsdown.
Mike
Re: Equivalent part number for rf board
Posted: Tue Jun 02, 2020 8:19 pm
by G8GKQ
Hi Mike
Not sure that there is a pin-for-pin replacement, but any regulator arrangement that gives between 2.5 and 2.8 volts could be used (don't be tempted to go as high as 3.3v). The current consumption is very low (less that 10 ma I think).
Dave
Re: Equivalent part number for rf board
Posted: Tue Jun 02, 2020 9:34 pm
by G8GKQ
Dave G4FRE reports that he used a 3.3 V regulator with a diode on the output to drop the voltage.
Dave, G8GKQ
Re: Equivalent part number for rf board
Posted: Wed Jun 03, 2020 9:04 am
by G1LWX
Thanks Dave i'll sort it just wondered if there was a direct replacement. A 3.3v with a diode sounds a good idea
73s Mike