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Good Day All, Just reaching out to see if anyone has had any issues with Motorola RKR1225 repeaters not producing flat audio on pin 11 of the accessory port with the "flat audio" check box enabled in the RSS software. We have 9 of these repeaters and due to audio quality issues, I want to switch the repeaters and links to flat audio. I have struggled with emphasis and de-emphasis filter paths. Some in the controller, some are enabled/disabled in the radios themselves. I have tried to eliminate it all by going flat audio. However, the audio links from some of the sites are still muddy. Using a backup repeater I have, I started investigating the issue. I have eliminated the de-emph filters on the controller and enabled flat audio in the RKR and Astro Spectra (used for the links) for both TX/RX. However, on the RKR1225, injecting a signal set for 3KHz deviation to the receiver, and varying the tone, the audio level coming from pin 11 on the RKR1225 is 4V PP at .600KHz and 650mV PP at 3KHz. Seems to be a lot of roll off at higher freqs. I would expect the opposite?? Switching back to "EIA" in the RKR doesn't seem to change anything. Again, I'm checking the level right at pin 11 - no controllers in line. Is this some impedance issue? Perhaps a switching issue inside the RKR1225? Today, going to check the output impedance spec and see if I can load it to see what difference it makes. May try another RKR1225 also. I've confirmed the modulation of the SM is flat across those frequencies. Thoughts and ideas are appreciated! Jim

I started a new thread for this as the most relevant was from 2010 I have a site with a couple of highband vhf repeaters as well as a ham machine on 145.210 -600. One of the highband repeaters is on a duplexer at the bottom of the string with the other highband repeater and the ham repeater(ve6aah) using 2037 multicouplers. My hope is to use another 2037 to allow APRS on 144.390 which is 220 kHz from the ham repeaters input. rx/tx would be nice but I would settle for a rx only if I had to. It has pretty good coverage already with an antenna on the roof of the building but the main antenna would be great. The 2037 tunes up nicely to 144.390 after changing to 24" inter-cavity cables, with 3.7 dB loss. While tuning, I did not adjust the coupling loops although did check the notch depth of each cans port with the other being unterminated, being ~10.5 dB. Thanks to the various posters from 04/21/10 who suggested that factor and much more. As its a mountaintop site, its pretty hard to test and tune in place but I do have a spare 2037 to emulate the repeaters input on the workbench. Thats getting cabled up now. Is what Im trying to do even possible? Excessive losses on the APRS is tolerable. Ross

All, I am looking for 1-2 Micor Mobiles and/or 1-2 GE Mastr II mobiles potentioally a station if the price is right and its close etc. I am looking for 100-110w radios, on UHF 450-470mhz. Please email me offlist at dwisdom@... Thanks --Don KD7WKF

Due to my former company keeping my Kenwood programming cables, I'm kind of stuck right now. I've got two tk790s I need to reprogram the frequencies and I know that front panel programming won't allow me to do that. I've got an old microphone with the connector and want to make up my own programming kpg 43 but I can't find the schematic anywhere. Don't be a smart ass and tell me to go buy one, as some people have previously done in other post. I don't have time! I know transmit and receive data is carried on one pin but how do you interface that to a FTDI? Resistors or is a xstr needed? I have searched everywhere and can't find the damn schematic for this thing. I know I used to have it but I lost it on an old hard drive. TIA Chris WB5ITT

hy guys, how much can i ask for an Zetron Maz 48 these days on the used market! i need advise , thanks gervais ve2ckn

Hi, does anyone have a good working repeater controller that would have at least one if not, two link ports as well as a repeater port? Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16.

Less than 1 year old Arcom RC210 Repeater Controller for sale. Rev 4.1 board. Has three TX/RX ports and logic input and output. Purchased pre-assembled from Arcom with rack mount case. Has DB9 type connectors on it (not the RJ45 ones). Works great, no issues. Includes pre built interface cable for Kenwood TKR-720 and TKR-820 repeaters, Arcom serial programming cable, and power cable. Does not include screws to hold top cover on rack mount. Can provide pictures to anyone interested. $370 shipped. PayPal only. Email me at this email or email listed on my QRZ page for more info.

Before you get too far into this, you may want to look at the FCC Regulations related to identification, and more importantly, remote control. Mick - W7CAT

Hello all, Our club has a Vertex VXR-7000 VHF repeater that has recently developed a problem. Whenever it finishes transmitting, it always power cycles. This happens both in remote mode with two different controllers (Arcom RC-210 and RLC Club Deluxe II), as well as operating in local mode without a controller. I’ve read where this might be an issue with the power supply. As of right now, we are running it off AC power. The thought crossed my mind of hooking it up to the big 70amp Astron up there with the Battery terminals on the Vertex and seeing if that cures the issue. Any ideas? Thanks, Stephen KG4PTO

Hey guys have a couple of Kenwood TK790's with the same problems. 1 is installed in a truck for several years , and the truck is driven by 1 foreman who is a trusted and valued foreman. The other was pulled froma truck we decommissioned. The removal was done by our company owner who is a fellow ham and has done several of the installs himself over the years. The problem is that there is no transmit audio. Both radios are remote mount, and the mics have been tested on known good radios and are working fine. I was told that the control heads have been swapped and the problem persists. I Have not as of yet done any testing on the radio that is installed, as the guy whose truck it is in wasnt available today. Does anyone have any ideas...... I personally am leaning toward a bad interconnect cable, but as these radio are a bit older I am trying NOT to just be a "parts changer" and buy new remote cables on a guess. Howard

I am looking for several RLN5933 in-dash brackets for the XPR4000 series radios to finish off a project. This is a bracket that fits into a single DIN dash opening in a standard vehicle. Apparently Motorola has discontinued this item. I am aware of other methods of accomplishing the same result. If you have any available, please reply directly to mengle@... Thanks Milt N3LTQ

A buddy and I are trying to configure a Kenwood TK8302 to work as a link radio from the RC 210 repeater controller. Bought a cable from Ken, but that doesn't work so does anyone have pinouts for the accessory port on the back of the TK8302 so we know what pins go to what? Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16.

Looking for a CLN1229. Anyone have one laying around? Matt AL0R

Hi all, Does anyone have any documentation on the Mastr II 800MHz PA's, or any Mastr II PA's at all? Follow up...has anyone ever modified one to 900MHz? Since all capacitors inside are fixed, there are not any adjustment points to slide it up. I have full power output on 860, and power drops significantly after 895. Just need to slide it up a little bit, but will need a schematic of it in order to figure out what new capacitors to stick inside. Thank you, Joe KC3LMP