Repeater repairs and upgrades

The 224.580 repeater had been repaired, and is back online. The power amp failed finally, and was somewhat repaired to get it back online. Three of the 5 FETS are dead, so those circuits were removed and bypassed. The amp is putting 20 watts to the feedline, better than the 1.5 watts from the excitet.

The upgrade is to the audio. Since this repeaterhasd been on the air, I’ve never been happy with the quality of the audio. I’ve finally reworked it, and it sounds great! We are now passing “flat” audio thru the system. Give it a try and let me know how it sounds.

Work continues on the next 220 repeater.I’m hoping to have it somewhat on the air for testing soon…

224.580 Repaired-Online

Well, thanks to my new radio, I thought something serious had gone wrong with the repeater. After getting home from work today and fixing supper, I loaded the truck with some tools/supplies and the kids and headed to the site. On the way down, reception of the repeater on the mobile was VERY poor, and the audio very VERY distorted.  As I got closer, I noticed I was hearing it fine on the HT, but still poor on the mobile.  About 2/3 of the way there I noticed an extra icon on the display of my new Alinco DR-235 that wasn’t there before. I finally remembered what it was…I somehow put the mobile into AM receive.  After some random button pressed, I manged to get the radio back into FM mode, and the repeater sounded great like it normally does. Since I was within 5 minutes of the site by then, I went ahead and stopped in to see how it was doing.

The output of the Uniden amplifier had dropped a little more, it is now down to ~50 watts output instead of the original 110+.  I need to find a source for some Polyfet F1004 and see about fixing it back up. Installed the rest of the intermod panel, and did some tests. Forward power after all the filtering is 35 watts, reflected at the feedline is less than 0.5 watts. Intermod panel is now complete, and includes a dual port isolator, followed by a low pass filter, band pass filter, then the 4 cavity pass/reject duplexers. I did a quick test for desense by transmitting a very weak signal over the air and disabling the transmitter, no noticeable difference in received signal.

All is well again!

New Radio

My trusty old ADI AR-247 mobile has seen better days. The display works when it feels like it, the internal speaker quite sometime ago, and now the external speaker jack is not working. It still works fine other than not being able to see the display, or listen the what is received (VERY minor details)!  It will be moved to link duties, and will replace the even older Kenwood TM-3530A that is now being used as the link radio for Echolink/Allstar. I just placed an order for a new Alinco DR-235 MKIII mobile to take it’s place.  Hopefully will be here before we leave for Nashville on the 14th so I can play some 220 on the way there!

Alinco's DR-235 MKIII Mobile
Alinco’s DR-235 MKIII Mobile

Echolink and AllStar back online

I’ve been having issues with the wireless bridge connecting the link computer to the internet. I finally moved the equipment to an area that would allow me to hard wire the computer to the switch.  As a result, I had to move the link antenna to a different location. Echolink and AllStar are now available. The quality of the link still needs to be checked, but at least it is on again.

Future plans involve obtaining internet at the repeater site and hard wiring the link computer directly to the repeater.  In the mean time, the link antenna may be moved to a more suitable location to improve the quality of the link.  Please let me know if there are any issues with it.   THANKS!

Donate

The Ohio 220 Group is working on replacing the ‘new’ controller that has been lost after the company apparently closed their doors. It was sent in for repair and we have not been able to contact them by phone or email since…
We are looking at the NHRC-5 controller which has all the features we need without all the extra bells and whistles. If you are able to, please consider making a small donation by clicking on the PayPal button below. ALL donations go towards the upkeep, improvement, and expansion of the network. Thanks!