Motorola MHW2723

Ideas, technical topics, help and discussion for ATV enthusiasts
Forum rules
This forum is run by the BATC (British Amateur Television Club), it is service made freely available to all interested parties, please do not abuse this privilege.

Thank you
G4KLB
Posts: 207
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: 26
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: 1153
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: 22
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: 1153
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

Post Reply

Return to “General ATV Discussion”