Voltage vs Output of radio and amp

**Turboomni** · 06-07-2021, 06:40 PM

Hey guys. I run a President McKinley + a small RM Italy kl-203 amp. Been running it as my base station lately with a server power supply. Very quiet and seems to work well. It is at least 50 amps. My question is the power supply runs at around 12.5 volts as it is fixed. I have recently been looking at the Megawatt S-400-12 35 amp power supply mainly because of the adjustable output voltage. With my setup if I raised the input voltage from 12.5 volts to say 14 volts would my power output go up significantly or just a little? Any other gains from a higher voltage like better modulation etc?? My hope in the future is to get a RM Italy 503 for the base station to get out a little better at my poor base location and keep the kl-203 just for my truck. Any thoughts or links would be much appreciated.
Thanks

**mjd420nova** · 06-07-2021, 07:36 PM

Increasing the supply voltage can increase power but will take many components beyond their designed specs and result in much smoke.

**Turboomni** · 06-07-2021, 07:46 PM

Yes I see. I was wondering how much I am missing as when in the truck it is most likely getting 13.5 or more when running. Thanks for the reply.

**whiteastro** · 06-08-2021, 05:51 AM

Originally Posted by Turboomni

Hey guys. I run a President McKinley + a small RM Italy kl-203 amp. Been running it as my base station lately with a server power supply. Very quiet and seems to work well. It is at least 50 amps. My question is the power supply runs at around 12.5 volts as it is fixed. I have recently been looking at the Megawatt S-400-12 35 amp power supply mainly because of the adjustable output voltage. With my setup if I raised the input voltage from 12.5 volts to say 14 volts would my power output go up significantly or just a little? Any other gains from a higher voltage like better modulation etc?? My hope in the future is to get a RM Italy 503 for the base station to get out a little better at my poor base location and keep the kl-203 just for my truck. Any thoughts or links would be much appreciated.
Thanks

Go to Copper Electronics and check the specs. on that RM Italy 503 you might want to buy a little bigger power supply. I thought I saw 45 amps somewhere.

**Turboomni** · 06-08-2021, 08:06 AM

The specs for the 503 is 30 amps. But the 503 is sold out everywhere. No one has it. Even some say [like 88radio] in stock but when you check out you cannot . Send the McKinley in yet?

**whiteastro** · 06-08-2021, 05:33 PM

sent the Mckinley in and got it back already. The SSB is coming in really great but still have to get a contact on transmit. I set a buddy up a few miles away with my old 980 and a mag-mount antenna so I'll check it out with him.