SvenMarbles Posted February 1 Report Share Posted February 1 What is a good and not very expensive power supply that can handle the amp draw of a 40-50 watt GMRS mobile to be used as a base station? Turns out the power supply that I have (4 amp, 7 peak) doesn’t even cut if for a 20 watt radio that I have. I'm shopping new radios and as long as I’m doing so I may opt for a 40-50 watt model. It seems that I need a new power supply as well regardless.. So what is a typical amp draw on a keyed up 40-50 watt radio? Quote Link to comment Share on other sites More sharing options...
Sshannon Posted February 1 Report Share Posted February 1 2 minutes ago, WSAK691 said: What is a good and not very expensive power supply that can handle the amp draw of a 40-50 watt GMRS mobile to be used as a base station? Turns out the power supply that I have (4 amp, 7 peak) doesn’t even cut if for a 20 watt radio that I have. I'm shopping new radios and as long as I’m doing so I may opt for a 40-50 watt model. It seems that I need a new power supply as well regardless.. So what is a typical amp draw on a keyed up 40-50 watt radio? Between 12 and 15 amps. WRXB215, SvenMarbles and WRUU653 2 1 Quote Link to comment Share on other sites More sharing options...
WRWE456 Posted February 1 Report Share Posted February 1 This is the one I use: https://www.dxengineering.com/parts/alo-dm-330mvt Plenty of power even for extra accessories. Powers my KG1000G, a handheld scanner and powered speaker for the scanner at the same time. Enough for a 100w HF radio. Has lots of connection options even a 12v cigarette lighter plug. I love it. WRUU653, wrci350 and Sshannon 3 Quote Link to comment Share on other sites More sharing options...
Sshannon Posted February 1 Report Share Posted February 1 It’s easier and less expensive to find a 25-30 amp switching power supply than to find one for 15 amps. I like Samlex but there’s nothing wrong with Astron or any of the manufacturer’s brands. WRUU653 and AdmiralCochrane 2 Quote Link to comment Share on other sites More sharing options...
WRYZ926 Posted February 1 Report Share Posted February 1 Here is another option for a 30 amp peak - 25 amp continuous power supply. https://www2.randl.com/index.php?main_page=product_info&cPath=13_9110&products_id=74100 That is what I use for my Wouxun KG-1000G and TYT TH-7800. Sshannon 1 Quote Link to comment Share on other sites More sharing options...
WRXV689 Posted February 1 Report Share Posted February 1 I just purchased a BTECH RPS-30PRO 30 Amp last weekend. It's working great for my two mobiles. One is a 20-watt (3-amp TX High), and the other is a 50-watt (11-amp TX High). Quote Link to comment Share on other sites More sharing options...
WRXP381 Posted February 1 Report Share Posted February 1 100ah agm and a trickle charger for me. Plus a small solar charger. No problem when the power goes out. Sab02r and WRQC527 2 Quote Link to comment Share on other sites More sharing options...
BoxCar Posted February 1 Report Share Posted February 1 Check Amazon for a Mean Well Supply. These are as good as you can get without the high prices charged for ham radio supplies. Many public safety agencies use Mean Well supplies in their repeater locations - and solid, clean power is often a critical life safety issue. Quote Link to comment Share on other sites More sharing options...
WRVQ464 Posted February 1 Report Share Posted February 1 Another option from Amazon. I removed a rocker switch from a broken kids eletric car for the ON/OFF switch. I have expericed no issues with this unit. https://www.amazon.com/gp/product/B06XJVYDDW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 Quote Link to comment Share on other sites More sharing options...
WRYZ926 Posted February 1 Report Share Posted February 1 49 minutes ago, WRVQ464 said: Another option from Amazon. I removed a rocker switch from a broken kids eletric car for the ON/OFF switch. I have expericed no issues with this unit. https://www.amazon.com/gp/product/B06XJVYDDW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 I know those server power supplies are popular with some. They only put out 12V and most will need to be modified to put out 13.8V. Yes a radio will run just fine at 12V but you won't get the full power output. Quote Link to comment Share on other sites More sharing options...
WRYZ926 Posted February 1 Report Share Posted February 1 Here is good but long video explaining how to modify a server power supply for use with amateur/GMRS radios. https://www.youtube.com/watch?v=f4LTDvdekEY&t=0s Quote Link to comment Share on other sites More sharing options...
WRVQ464 Posted February 5 Report Share Posted February 5 On 2/1/2024 at 8:11 AM, WRYZ926 said: I know those server power supplies are popular with some. They only put out 12V and most will need to be modified to put out 13.8V. Yes a radio will run just fine at 12V but you won't get the full power output. The unit voltage is adjustable and is set to 13.8v for my base radio. https://www.amazon.com/gp/product/B06XJVYDDW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 Quote Link to comment Share on other sites More sharing options...
WRYZ926 Posted February 5 Report Share Posted February 5 1 hour ago, WRVQ464 said: The unit voltage is adjustable and is set to 13.8v for my base radio. https://www.amazon.com/gp/product/B06XJVYDDW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1 Yes some of those 30 amp server power supplies are adjustable for voltage output. The 100 amp power supplies normally need to be modified to put out 13.8V without damaging the unit. Quote Link to comment Share on other sites More sharing options...
nokones Posted February 5 Report Share Posted February 5 In addition to Astron, Tripp Lite, you might want to look into the Powerwerx 28 Amp Power Supply. I've been using this power supply for my three base units for sometime and it's been doing great. Also, I was surprised on the physical size of this unit being small and it never seems to get hot. https://powerwerx.com/variable-power-supply-digital-meters-30amp There is no such thing of anything being quality and cheap. Anyways, cheap is relative. You get what you pay for. WRWE456 1 Quote Link to comment Share on other sites More sharing options...
WRYC373 Posted February 8 Report Share Posted February 8 I use a meanwell 30a personally. Quote Link to comment Share on other sites More sharing options...
WRYZ926 Posted February 8 Report Share Posted February 8 Remember that most manufacturers advertise their power supplies at the peak amp rating. You want to double check to see what the continues amp rating is. Most power supplies advertised as 30 amps are normally between 24 and 26 amps continuous. Quote Link to comment Share on other sites More sharing options...
wrci350 Posted February 8 Report Share Posted February 8 1 hour ago, WRYZ926 said: You want to double check to see what the continues amp rating is. Good advice. I just checked the two different Alinco power supplies I use. The DM-330MVT is rated 32A peak ... and 30A continous. The DM-30 is rated 30A peak but only 20A continous. Big difference. WRYZ926 1 Quote Link to comment Share on other sites More sharing options...
WRYZ926 Posted February 8 Report Share Posted February 8 51 minutes ago, wrci350 said: Good advice. I just checked the two different Alinco power supplies I use. The DM-330MVT is rated 32A peak ... and 30A continous. The DM-30 is rated 30A peak but only 20A continous. Big difference. Yes it is. Now most people can get by just fine running two 50 mobile radios on one 30 amp (peak) power supply simply because most will never be transmitting on both radios at the exact same time. Now if people were to transmit on two 50 watt mobiles at the same time say like during a field day/demonstration, then some 30 amp power supplies might not be enough. It will depend on the continuous amp rating. Sshannon 1 Quote Link to comment Share on other sites More sharing options...
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