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Author Topic: COR for portable repeater..  (Read 559 times)

Offline optics

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COR for portable repeater..
« on: July 19, 2012, 03:39:06 PM »
sir and madam

pashare naman po ng COR diagram for portable repeater need ko po for group project..tnx

73,

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COR for portable repeater..
« on: July 19, 2012, 03:39:06 PM »

Offline bravokilo

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Re: COR for portable repeater..
« Reply #1 on: July 19, 2012, 04:51:04 PM »
Optics, hanapin ko sa ARRL ko. Andun yan. 555 lang ang kailangan dyan. The COR swiyches the TX on when there is a carrier hiss in the RX. The idea is NOT to shut down the TX right away as the end of the carrier hiss but is extrended a bit. The 555 set up as a delayer will do that.

BK 0922 281 0680

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Re: COR for portable repeater..
« Reply #1 on: July 19, 2012, 04:51:04 PM »

Offline bravokilo

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Re: COR for portable repeater..
« Reply #2 on: July 19, 2012, 05:06:11 PM »



Eto muna na hinde IC. Sa audio lang ang source ng trigger signal. Kapag may audio, ON and relay. Kapag nawala ang audio , may dealy bago mag open ang relay.

BK

Philippine Electronics Forum

Re: COR for portable repeater..
« Reply #2 on: July 19, 2012, 05:06:11 PM »

Offline bravokilo

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Re: COR for portable repeater..
« Reply #3 on: July 19, 2012, 05:43:20 PM »




eto using the 555.


BK

Philippine Electronics Forum

Re: COR for portable repeater..
« Reply #3 on: July 19, 2012, 05:43:20 PM »

Offline optics

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Re: COR for portable repeater..
« Reply #4 on: July 22, 2012, 03:48:29 PM »
BK,

maraming salamat po, pwed po ba ako makahinge ng parts list d po kc makita ung nakapose e..tnx

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Re: COR for portable repeater..
« Reply #4 on: July 22, 2012, 03:48:29 PM »

Offline bravokilo

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Re: COR for portable repeater..
« Reply #5 on: July 22, 2012, 06:13:55 PM »
Yung transistor, us a C945 or 9013. Yung relay mayroon sa Deeco na 6V. maliit lang, I think P25. Yung resistors andyan ang values, pati caps. Yung IC, sabihin mo lang 555, P10 lang ata. Yung diode across the relay, 1n4001 will do. Observe polarity. Yung line sa taas ng pix, yung yun galing receiver mo to the mic of the TX. 10ohms across, 1 k in series. Low impedance kasi yung speaker out mo at malakas sobra for the mic, kaya may 10ohms across at 1k pa in series. Kadalasan ICOM porta lang and RX, so may earphone out yun.

BK

Philippine Electronics Forum

Re: COR for portable repeater..
« Reply #5 on: July 22, 2012, 06:13:55 PM »

 

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