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Convert msr2000 for 12.5 khz
Posted: Tue Jun 30, 2009 7:11 am
by celltech25
Is there a kit or anything that will make the msr2000 vhf 110w 12.5 khz compliant
Re: Convert msr2000 for 12.5 khz
Posted: Tue Jun 30, 2009 10:08 am
by Al
Jason, you can try calling Communications Specialists, or see
http://www.com-spec.com/narrow.htm
Re: Convert msr2000 for 12.5 khz
Posted: Wed Jul 01, 2009 10:43 am
by d119
It doesn't appear there's a specific kit for the MSR 2000, but seeing as how that radio is basically a Mitrek in design, the Communications Specialists "CF-MITREK" is probably what you'd want to use. CommSpec can confirm this.
Re: Convert msr2000 for 12.5 khz
Posted: Sun Jul 12, 2009 11:08 pm
by bernie
My two bits worth:
Unless you have an adjacent channel problem, why change the IF filter?
Just set the IDC for narrow band spec.
Re: Convert msr2000 for 12.5 khz
Posted: Mon Jul 13, 2009 5:06 am
by arlojanis
In the 1950's, we narrowed banded from 15 kc to 5 kc deviation. The Motorola transmitters required a splatter choke and a gold crystal oven to meet tighter specs and they got a new FCC type acceptance number like CC101 for some models. Will todays transmitters be legal by just adjusting down modulation and not increasing frequency stability? Most receivers were not changed. Some receivers got a new permakay filter and some resistor changes in the squelch circuit.