Bought a new Powermax PM3 55 amp 12 volt power supply. Powered up a small two pill amp and six amp max draw Lincoln 2 plus version 3 radio OK. Fan did not even run, and the supply just barely got warm.
I used headphones plugged into the external speaker of the radio. I don't use talk back much, but I did turn it on to check for noise, and the power supply was making a very loud hum with just the mic keyed. Plugged in an external speaker, and it was making the same loud humming noise. Absolutely zero noise with a Megawatt doing the same above.
Also, every time I keyed the mic the LED light on a Daiwa and MFJ watt meter would flicker, and then flicker again when I unkeyed the microphone. On SSB, the flickering caused a light show.
Anyway, I bought this from DonRowe.com, and the power supply was drop shipped from Powermax. I emailed DonRowe requesting RMA. The sales person from DonRowe got Errin from Powermax involved in the RMA process. Errin is VP Sales. Basically, we were having a three way email conversation.
Below is a copy and paste of what Errin VP of Sales says about Powermax warranty.
"Last time I checked our spec says it puts out 14V to charge batteries. Isis not doing that? I know these can be use on Ham/CB radio equipment BUT we dont guarantee that. Our spec shows an out put of 14V to charge batteries. So Id say its working to our spec. Now if someone wants to have a conversation about that we are open BUT I beleive our unit is working to spec"
--
Errin Tribble
VP Sales
574-349-0078
@PowerMaxPM3 (Twitter)
As soon as you flip switch to run the power supply as a converter, you have no warranty! This guy Errin can diagnose problems over the internet all the while ignoring what I said, and then declare product working as intended.
I used headphones plugged into the external speaker of the radio. I don't use talk back much, but I did turn it on to check for noise, and the power supply was making a very loud hum with just the mic keyed. Plugged in an external speaker, and it was making the same loud humming noise. Absolutely zero noise with a Megawatt doing the same above.
Also, every time I keyed the mic the LED light on a Daiwa and MFJ watt meter would flicker, and then flicker again when I unkeyed the microphone. On SSB, the flickering caused a light show.
Anyway, I bought this from DonRowe.com, and the power supply was drop shipped from Powermax. I emailed DonRowe requesting RMA. The sales person from DonRowe got Errin from Powermax involved in the RMA process. Errin is VP Sales. Basically, we were having a three way email conversation.
Below is a copy and paste of what Errin VP of Sales says about Powermax warranty.
"Last time I checked our spec says it puts out 14V to charge batteries. Isis not doing that? I know these can be use on Ham/CB radio equipment BUT we dont guarantee that. Our spec shows an out put of 14V to charge batteries. So Id say its working to our spec. Now if someone wants to have a conversation about that we are open BUT I beleive our unit is working to spec"
--
Errin Tribble
VP Sales
574-349-0078
@PowerMaxPM3 (Twitter)
As soon as you flip switch to run the power supply as a converter, you have no warranty! This guy Errin can diagnose problems over the internet all the while ignoring what I said, and then declare product working as intended.