WSDI867 Posted June 24 Report Posted June 24 On 6/22/2024 at 11:54 AM, SvenMarbles said: It’s purely speculative on my end, but this issue REALLY sounds like whatever power source you’re using cannot supply adequate amperage to the radio while keyed on high.. Yes you are correct. My power supplies were both underpowered at around 5 amps 7 amp peak. Now I just need to find a cheap power supply.. I have been looking for 20 to 30 amps... what would be the ideal amperage? Quote
Borage257 Posted June 24 Report Posted June 24 It’ll have to be wired up, but there’s this. https://a.co/d/05s7uRel Quote
dosw Posted June 24 Report Posted June 24 2 hours ago, Borage257 said: It’ll have to be wired up, but there’s this. https://a.co/d/05s7uRel That one is listed at 12v, not 13.8. I never find 13.8v power supplies in 20A or more for less than $79 Quote
Borage257 Posted June 24 Report Posted June 24 (edited) You can buy either a 12v or 15v. Both have adjustment screws to dial in your voltage. Edited June 24 by Borage257 Added snips for product and product data sheet dosw 1 Quote
SteveShannon Posted June 24 Report Posted June 24 8 hours ago, WSDI867 said: Yes you are correct. My power supplies were both underpowered at around 5 amps 7 amp peak. Now I just need to find a cheap power supply.. I have been looking for 20 to 30 amps... what would be the ideal amperage? A 100 watt radio needs about 23 amps. A 50 watt radio needs about half that, maybe 12-15 amps. Quote
WSDI867 Posted July 8 Report Posted July 8 On 6/24/2024 at 8:49 AM, Borage257 said: You can buy either a 12v or 15v. Both have adjustment screws to dial in your voltage. Thanks this power supply works great for my Retevis RA87 40watt GMRS radio. No more power failures. The power supply is quiet and hasn't needed to run the fan yet. Quote
Borage257 Posted July 8 Report Posted July 8 1 hour ago, WSDI867 said: Thanks this power supply works great for my Retevis RA87 40watt GMRS radio. No more power failures. The power supply is quiet and hasn't needed to run the fan yet. You’re welcome! Pair it with a good LiFePo4 battery (20ah or more) and charger for emergency comms too! Quote
WRCK329 Posted October 27 Report Posted October 27 Any feedback on duty cycle? Most mobile radios get extremely hot when used as a repeater. I can't find the listed duty cycle anywhere Quote
WSBY849 Posted December 8 Report Posted December 8 I am fairly new to GMRS, have only had my license for 6 months, and just set up a RA87 this weekend and been programming repeaters around my area with CHIRP. The radio seems pretty solid. Can't speak to durability-offroad use, as I am using as a base station in my home with the Retevis RA09 antenna currently mounted on a tripod on upstairs floor - HOA prevents having radio antennas above roofline but those unsightly dishes are everywhere... go figure. Quote
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