rfmedic

I usually monitor the .700 repeater that has a 100 pl. Seems to do alright in brooklyn queens and lower manhattan. Its listed as open for everyone... I usually catch someone on there from time to time

It can be done, however the equipment and engineering required for a simple gmrs repeater is NOT worth the effort or energy if you could get the station/their engineer to agree to it.

Its not too terrible at all depending on the repeater.

The 462.700 is open in brooklyn with a Pl of 100.0 from the listing

I'll 2nd the Open-700 repeater, it seems to cover very well. I think if we got more people in the area to jump on it, there could be a possibility of a nice community forming on the air.

Negative, DXCC entities and sovereign nations are 2 different lists. Lookup current DXCC Entities for the complete 325 recognized entities. These include islands/territories that are controlled by major nations but are not geographically located in those nations - i.e. - Guam, Samoa, USVI, BVI, Easter Island... My count of 300 is the total combined multipliers from all 6 bands. The main bands averaged 70 mults with 20m having 91.

700+ qsos between all 6 bands and 300+ countries in total (around 70+) per band here.

Adding the LPF is a waste. The LPF would be necessary if you were running a circulator on the output of the transmit radio to supress the harmonics generated by the magnetic core. Put more effort into your antenna system. Heliax and a better antenna. Decibel DB404/408/420 or a Commander PD-201 or PD-455. Thats the weak part of your system from what you have described. Finally browsing the forum. My day to day rf engineering workload here in Gotham has kept me too busy for the hobbyist side of things. -RFMedic

This whole thread hurts and is an absolute waste of time for the actual results. You would have more loss in the phasing harnesses than you would gain. Put up the DB420 and enjoy the hell out of a kicka** antenna.

I've been running multiple 900mhz repeaters for years. It is a great band. Similar to 440mhz but with sharper nulls etc... The trick is finding clear input and output freqs...my machines are on odd splits because of that but since everyone is on commercial radios it doesnt matter. Motorola GTX and MCS2000 are my preference. KENWOOD TK-981 my other preference. For at home base antennas comet makes a really well performing fiberglass vertical. LMR-400 or better is damn near mandatory. Thats my 2cents. FYI nyc based.

Comtelco is the only name under $400 I would go with in repeater duty. Otherwise in the top performing category that I would aim for OVER $400 are: Commander PD-455 or PD-1151 Commscope DB-420 or DB408 "If you don't put your money into the antenna system, you have wasted the rest of it"

Hopefully this straightens this out for you: Fixed station: A fixed station, not open to public correspondence, operated by, and for the sole use of those agencies operating their own radio communication facilities in the Public Safety, Industrial, Land Transportation, Marine, or Aviation Radio Services. Base Station - A station at a specified site authorized to communicate with mobile stations. ENGLISH NOW: 50watts is your max Mobile, Base, or Repeater

Alerts - OK Full time audio - BAD

I would try switching out for another CDM1550. I would also watch my battery voltage. SOME of the CDMs have had that problem where once voltage hits 11.5VDC the VCOs start to unlock and you get the beeping. Try another CDM, check voltages, reseat power connections on battery, verify inline fuse. My initial thoughts. -RF Medic

99% of commercial mobile radios were designed around end users who made short transmissions in bursts - dispatchers, drivers, etc... They were never intended for the 50-75% duty cycle that the hobbyist/gmrs world utilizes them for without additional cooling. Hence why they run extremely hot if you are BSing for 20minutes or longer. The UHF CDM is intended to be run at 40watts in high power. Additional cooling such as a small fan on the heat sink would be a good idea depending on your talking habits. The reason the software allows you to program up to "48watts" is to adjust to 40watts without having to do an alignment/power calibration on the unit in the field. Depending on soft-pot settings sometimes "42" gives you 40 or "46" gives you 40 etc... -RfMedic