Problems with radius M100

leitung · #1 (**permalink**) 02-25-2012, 6:49 AM

Okay, I am a rookie here, and I am trying to setup my radius m100 as a base station. Now heres my issue, I bought a 13.8v 10 amp power supply, and hooked up the radio to that, the power supply blew the fuse, I replace it and disconnect the radio, bam pops the fuse again, and again the third time. So i am assuming my $50 power supply is toast.

Next issue, I connect the radio to crappy 12v 500mA power supply I ghetto rigged from an old linksys power supply, just to test the radio. It powers on and recieves no problem. Now when I go to transmit using that setup, the channel light blinks rapidly between red and green and I hardly get no reception through the repeater, now I assuming that this is because there is not enough juice coming from the power supply. Am I correct in this assumption? Also, what power supply do you recommend for this kind of setup?

Thanks for all the help you can offer.

SteveC0625 · #2 (**permalink**) 02-25-2012, 7:08 AM

You are correct that the smaller supply can't handle the transmit side.

However, if that is a 40 watt radio or higher power, the 10 amps may not be enough. Try a 15 AMP supply.

leitung · #3 (**permalink**) 02-25-2012, 7:11 AM

It's a 25 watt radio model # D34LRA73A5CK, I was thinking that 10amp would be plenty. I guess I am going to have to toss some $ on a good 20 amp supply or so eh?

SteveC0625 · #4 (**permalink**) 02-25-2012, 7:41 AM

Quote:

Originally Posted by leitung

It's a 25 watt radio model # D34LRA73A5CK, I was thinking that 10amp would be plenty. I guess I am going to have to toss some $ on a good 20 amp supply or so eh?

10 Amps is the correct rating needed for a ps for that radio. I believe the correct Motorola item is HPN4002 if you wanted to go that route. I have one running right here in the office right now powering a CM300. There are two of those supplies up on Ebay right now for about $46 each including shipping.

HPN4007 is the part number for the 15 amp supply from Motorola for their 50 watt radios. None on Ebay at the moment, but they come and go.

kermitdafrog · #5 (**permalink**) 02-25-2012, 8:36 AM

Quote:

Originally Posted by leitung

It's a 25 watt radio model # D34LRA73A5CK, I was thinking that 10amp would be plenty. I guess I am going to have to toss some $ on a good 20 amp supply or so eh?

A car battery with a trickle charger comes to mind. That's how I have always run my 100 watt ham tranceivers for years ... never bought a supply

davidgcet · #6 (**permalink**) 02-25-2012, 11:35 AM

did it blow the fuse on TX, or instantly? if instantly then you have the radio hooked up backwards. if only on tx, and it works fine on RX, then you just need a bigger PS. i've seen crappy "20A" power supplies that won't handle a 10A load more than a second. then again i've seen good 20A power supplies that will handle 30+A for a few minutes continuous load.

leitung · #7 (**permalink**) 02-25-2012, 4:36 PM

No it blew instantly, then even after I removed the connection to the radio it kept blowing fuses right as I turned it on.
I just got a Motorola power supply on eBay, 49 bucks shipped.
The radio works, that's the main thing.

leitung · #8 (**permalink**) 02-25-2012, 9:11 PM

Quote:

Originally Posted by SteveC0625

10 Amps is the correct rating needed for a ps for that radio. I believe the correct Motorola item is HPN4002 if you wanted to go that route. I have one running right here in the office right now powering a CM300. There are two of those supplies up on Ebay right now for about $46 each including shipping.

HPN4007 is the part number for the 15 amp supply from Motorola for their 50 watt radios. None on Ebay at the moment, but they come and go.

Thanks for the info!! I picked up one of those on eBay last night. Hopefully that will solve my woes. I am really looking forward to making this happen.

kb0nly · #9 (**permalink**) 02-25-2012, 10:27 PM

If its blowing fuses the second you turn it on, and i assume you mean the fuse in the DC output side and not the fuse that protects the AC input side, then you obviously have a dead short somewhere.

I would check it out, your not out nothing now since its basically useless. Tear it apart!

leitung · #10 (**permalink**) 02-25-2012, 11:12 PM

Quote:

Originally Posted by kb0nly

If its blowing fuses the second you turn it on, and i assume you mean the fuse in the DC output side and not the fuse that protects the AC input side, then you obviously have a dead short somewhere.

I would check it out, your not out nothing now since its basically useless. Tear it apart!

Its the little fuse that unscrews in the back. Maybe I will do some surgery on it and see whats going on.