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Compiled, HTML'd and Maintained by Mike Morris WA6ILQ
This Information Was Acquired in October 2019

CONTRIBUTIONS OR CORRECTIONS TO THIS PAGE ARE WELCOME!
Actually to any page at this web site!

The page maintainers comments are in italics.

File Name Description Bytes

Note01.html Telephone Lightning Protection 3,792

Note02.html Positive Current Transmitter PTT 3,062

Note03.html Simple CAT Test Set This design will also work on Arcom, Scom or RLC controllers.
You can duplicate the COR simulate switch to create a PL Decode simulate function. You can eliminate the second pole of the switch with an amplified PC speaker pair with the left speaker on the repeater and the right speaker on the second controller port. 3,053

Note04.html Telephone Busy Detector
It's actually a telephone line offhook detector. 3,480

Note05.html ICOM RP-1520 repeater interfacing
The RP-1510, RP-1520 and RP-1620 are VHF Repeaters, the RP-2210 is a 220 MHz, the RP-4020 and RP-4520 and UR-8050 are UHF repeaters. 3,011

Note06.html Vertex VXR-5000 repeater interfacing 2,785

Note07.html Replace obsolete "85" with CAT controller 2,465

Note08.html Replace obsolete "96" with CAT controller 2,491

Note09.html Replace obsolete "850" with CAT controller 2,492

Note10.html Frequency response plots of CAT controllers 4,229

Note11.html Vertex VXR-7000 repeater interfacing 3,444

Note12.html Kenwood TKR-750/850 repeater interfacing
They forgot the speaker enable jumper (pin 9 to pin 12) on the 15 pin Molex plug. See the Kenwood repeater interfacing page at this web site. 7,136

Note13.html Kenwood TKR-850 repeater interfacing.
I don't know why this Note exists, the TKR-750 is VHF, the 850 is UHF, the interfacing is identical, and Note 12 actually has more info than this one. 6,774

Note14.html IRLP interfacing 2,970

Note15.html Motorola MSR2000 repeater interfacing 5,018

Note16.html Simple COR Buffer/Driver circuit 5,400

Note17.html High Impedance COR Buffer/Driver circuit 7,761

Note18.html Motorola MaxTrac / Radius mobile radio interfacing.
This information also applies to the GM300 and M1225 mobiles and the R1225, GR1225, RKR1225, GR300, GR400 and GR500 repeaters.. 5,689

Note19.html USB to RS-232 converter cables
This info is dated. I suggest you go to this page (opens in a new browser tab) and scroll down to the heading
"Some Problems with USB and USB-to-Serial Adapters: Especially when programming radios..." 7,547

Note20.html Repeater Death-Ray
Adding a control receiver when there isn't any port for it. See also this page. 3,140

Note21.html GE MASTR III to CAT-250 interfacing 14,376

Note22.html Kenwood TKR-720/820 repeater interfacing 3,189

File Name	Description	Bytes
Note01.html	Telephone Lightning Protection	3,792
Note02.html	Positive Current Transmitter PTT	3,062
Note03.html	Simple CAT Test Set This design will also work on Arcom, Scom or RLC controllers. You can duplicate the COR simulate switch to create a PL Decode simulate function. You can eliminate the second pole of the switch with an amplified PC speaker pair with the left speaker on the repeater and the right speaker on the second controller port.	3,053
Note04.html	Telephone Busy Detector It's actually a telephone line offhook detector.	3,480
Note05.html	ICOM RP-1520 repeater interfacing The RP-1510, RP-1520 and RP-1620 are VHF Repeaters, the RP-2210 is a 220 MHz, the RP-4020 and RP-4520 and UR-8050 are UHF repeaters.	3,011
Note06.html	Vertex VXR-5000 repeater interfacing	2,785
Note07.html	Replace obsolete "85" with CAT controller	2,465
Note08.html	Replace obsolete "96" with CAT controller	2,491
Note09.html	Replace obsolete "850" with CAT controller	2,492
Note10.html	Frequency response plots of CAT controllers	4,229
Note11.html	Vertex VXR-7000 repeater interfacing	3,444
Note12.html	Kenwood TKR-750/850 repeater interfacing They forgot the speaker enable jumper (pin 9 to pin 12) on the 15 pin Molex plug. See the Kenwood repeater interfacing page at this web site.	7,136
Note13.html	Kenwood TKR-850 repeater interfacing. I don't know why this Note exists, the TKR-750 is VHF, the 850 is UHF, the interfacing is identical, and Note 12 actually has more info than this one.	6,774
Note14.html	IRLP interfacing	2,970
Note15.html	Motorola MSR2000 repeater interfacing	5,018
Note16.html	Simple COR Buffer/Driver circuit	5,400
Note17.html	High Impedance COR Buffer/Driver circuit	7,761
Note18.html	Motorola MaxTrac / Radius mobile radio interfacing. This information also applies to the GM300 and M1225 mobiles and the R1225, GR1225, RKR1225, GR300, GR400 and GR500 repeaters..	5,689
Note19.html	USB to RS-232 converter cables This info is dated. I suggest you go to this page (opens in a new browser tab) and scroll down to the heading "Some Problems with USB and USB-to-Serial Adapters: Especially when programming radios..."	7,547
Note20.html	Repeater Death-Ray Adding a control receiver when there isn't any port for it. See also this page.	3,140
Note21.html	GE MASTR III to CAT-250 interfacing	14,376
Note22.html	Kenwood TKR-720/820 repeater interfacing	3,189

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This page originally created on October 30, 2019

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