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Minitor II or III receiver board project?

This forum is focused on discussing Digital and Voice paging equipment, protocol's, infrastructure, and Motorola specific hardware used. Please refrain from discussing different ways to monitor the digital paging systems due to the legalities of such.

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Mikey
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What radios do you own?: CDM1550 LS+, HT1250, MCS2000

Minitor II or III receiver board project?

Postby Mikey » Tue Feb 03, 2015 6:35 pm

Ok, this may sound stupid but I have a bunch of old Minitor 2 and Minitor 3 pagers laying around and I have a project where I need a simple little receiver. Due to space constraints I need just the receiver board and not the whole pager in there. Does anybody know the pinouts on either of these receiver boards so I can just supply power to the receiver board after I take it out of the pager and make it work? all I need is power and antenna going in and audio coming out, that's it? is this possible?


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KC9MDQ
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Re: Minitor II or III receiver board project?

Postby KC9MDQ » Sun Mar 22, 2015 1:17 pm

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kb4mdz
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Re: Minitor II or III receiver board project?

Postby kb4mdz » Mon Mar 23, 2015 12:15 pm

Oooh, long time since I been MInitor II technician. Don't remember how the RX is set up; whether the whole RX is on one board, or RX to IF on one, and a IF-detector board , then the audio/decoder board.

Well, from what I remember and what I know, I'm guessing you want maybe just the audio out? About all I can remember of the Minitor 2 is that there was about 5 pin connector between boards; and the first batches relied on just the spring tension of the wires to hold the board & place & provide the connection. Soon, they added a plastic body to the connector to provide better contact and keep the pins from breaking.

But, that really doesn't help you; I'm just thinking 5 pins could have been power, ground, Detected Audio, something else? If it was a 2 freq. pager one pin could do channel switch - Hi = Ch1, grounded = Ch. 2?


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