Motorola MHW2723

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G4KLB
Posts: 244
Joined: Wed May 28, 2008 10:46 am

Re: Motorola MHW2723

Post by G4KLB » Fri May 17, 2013 9:53 pm

Thanks for the info Dave, I didn't find that one!
Regards
Colin G4KLB

g6crf
Posts: 42
Joined: Mon May 12, 2014 11:20 am

Re: Motorola MHW2723

Post by g6crf » Wed May 21, 2014 12:46 pm

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

G0KTD
Posts: 45
Joined: Wed Jun 08, 2011 7:39 am

Re: Motorola MHW2723

Post by G0KTD » Sat May 24, 2014 9:36 am

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

g8gtz
Posts: 1733
Joined: Wed Apr 07, 2010 6:26 pm

Re: Motorola MHW2723

Post by g8gtz » Wed Jul 26, 2017 11:50 am

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

G0EID
Posts: 25
Joined: Thu Oct 17, 2013 3:19 pm

Re: Motorola MHW2723

Post by G0EID » Wed Jul 26, 2017 10:54 pm

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

g8gtz
Posts: 1733
Joined: Wed Apr 07, 2010 6:26 pm

Re: Motorola MHW2723

Post by g8gtz » Sun Jul 30, 2017 7:11 pm

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

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