Convert msr2000 for 12.5 khz

This forum is for discussions regarding System Infrastructure and Related Equipment. This includes but is not limited to repeaters, base stations, consoles, voters, Voice over IP, system design and implementation, and other related topics.

Moderator: Queue Moderator

Post Reply
celltech25
Posts: 509
Joined: Fri Apr 29, 2005 3:54 am

Convert msr2000 for 12.5 khz

Post by celltech25 »

Is there a kit or anything that will make the msr2000 vhf 110w 12.5 khz compliant
Al
Posts: 1045
Joined: Tue Sep 04, 2001 4:00 pm

Re: Convert msr2000 for 12.5 khz

Post by Al »

Jason, you can try calling Communications Specialists, or see http://www.com-spec.com/narrow.htm
User avatar
d119
Posts: 3538
Joined: Tue Mar 19, 2002 4:00 pm

Re: Convert msr2000 for 12.5 khz

Post 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.
bernie
Batboard $upporter
Posts: 848
Joined: Wed Nov 07, 2001 4:00 pm

Re: Convert msr2000 for 12.5 khz

Post 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.
Aloha, Bernie
User avatar
arlojanis
Posts: 1055
Joined: Mon Jan 28, 2002 4:00 pm

Re: Convert msr2000 for 12.5 khz

Post 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.
"The world runs on radio."
Post Reply

Return to “Base Stations, Repeaters, General Infrastructure”