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Re: Motorola MHW2723
Posted: Fri May 17, 2013 9:53 pm
by G4KLB
Thanks for the info Dave, I didn't find that one!
Regards
Colin G4KLB
Re: Motorola MHW2723
Posted: Wed May 21, 2014 12:46 pm
by g6crf
Does anyone know where I can get one of the Modules, tried all the suppliers I can think of and there are none on ebay.
Cheers
Terry
G6CRF/G0CRF
Re: Motorola MHW2723
Posted: Sat May 24, 2014 9:36 am
by G0KTD
Terry how about this module looks similar may be able to adapt to the board.
seeing that none of the mhw are about have been searching myself.
http://html.alldatasheet.com/html-pdf/1 ... 57745.html.
Keith G0KTD
Re: Motorola MHW2723
Posted: Wed Jul 26, 2017 11:50 am
by g8gtz
3 years on I know, but did anyone ever get one of these working properly on 70cms?
I remember at the time mine went unstable and I'm trying to get one working on a Portsdown and get the same problems with instability....
73 Noel
Re: Motorola MHW2723
Posted: Wed Jul 26, 2017 10:54 pm
by G0EID
Hi Noel,
I tamed mine by playing with the bias voltage.
I replaced the 0Ohm resistor on the output of the regulator with a 500Ohm pot, the metal shrouded ones used for I/Q bias on the DigiLite boards sit across the tracks quite well.
My module settled down with 4.3Volts on the bias pin.
73
Dave
Re: Motorola MHW2723
Posted: Sun Jul 30, 2017 7:11 pm
by g8gtz
Cracked it - copper tape around the edge of the board to bond between upper and lower plus adjustable bias.
Driven directly by the Portsdown gives 8 watts with 30+ shoulders on 2Ms and 40+ on 333Ks in a nice compact unit - needs a big heatsink and blowing...
73 Noel