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#1
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Power amps/watts consumption query?
I would be grateful for the advice of one of our technically minded
members: The new radio I have coming merely states it's power consumption as 210VA, as it is a multivoltage radio. What consumption in watts/amps does this translate to at 240 volts AC mains? Also. if I used an inverter to drive it off a 12 volt DC battery, what would the power consumption in amps then be? A friend who helped me wrote: Watts = Volts * Amperes so 210VA = 210 Watts 210 Watts means 210 / 240 Amps which is .875 Amps. If you want to use a 12V battery, 210 Watts means 210 / 12 Amps or 17.5 Amps. This assumes the AC supply is as efficient as the DC supply. It won't actually be quite as efficient, so you're likely to need fewer Amps, maybe 14 or 15 but that's a guess. Maybe you can ask as the DC current depends on their design which is not known to us yet. Those numbers look very high to me. I suspect they've made a little mistake. I replied: it does seem very high to me for 210VA. at 240 volts AC mains. As just a poor guess I would estimate 0.5 amps at 240 volts AC mains and 8 amps at 12v DC but I cannot calculate it. _______________________________ So what do the experts out there think? Would be grateful for your help. John Plimmer, Montagu, Western Cape Province, South Africa South 33 d 47 m 32 s, East 20 d 07 m 32 s RX Icom IC-756 PRO III with MW mods Drake SW8 & ERGO software Sony 7600D, GE SRIII, Redsun RP2100 BW XCR 30, Sangean 803A. Antenna's RF Systems DX 1 Pro Mk II, Datong AD-270 Kiwa MW Loop, PAORDT Roelof mini-whip http://www.dxing.info/about/dxers/plimmer.dx |
#3
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Power amps/watts consumption query?
"David" wrote in message ... That's key-down CW right? Worst case? If you're going to be just listening or working SSB your power consumption will be much less. The 210VA is the RECEIVE STANDBY current.. |
#4
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Power amps/watts consumption query?
David wrote: wrote: I would be grateful for the advice of one of our technically minded members: The new radio I have coming merely states it's power consumption as 210VA, as it is a multivoltage radio. What consumption in watts/amps does this translate to at 240 volts AC mains? Also. if I used an inverter to drive it off a 12 volt DC battery, what would the power consumption in amps then be? A friend who helped me wrote: Watts = Volts * Amperes so 210VA = 210 Watts 210 Watts means 210 / 240 Amps which is .875 Amps. If you want to use a 12V battery, 210 Watts means 210 / 12 Amps or 17.5 Amps. This assumes the AC supply is as efficient as the DC supply. It won't actually be quite as efficient, so you're likely to need fewer Amps, maybe 14 or 15 but that's a guess. Maybe you can ask as the DC current depends on their design which is not known to us yet. Those numbers look very high to me. I suspect they've made a little mistake. I replied: it does seem very high to me for 210VA. at 240 volts AC mains. As just a poor guess I would estimate 0.5 amps at 240 volts AC mains and 8 amps at 12v DC but I cannot calculate it. _______________________________ So what do the experts out there think? Would be grateful for your help. John Plimmer, Montagu, Western Cape Province, South Africa South 33 d 47 m 32 s, East 20 d 07 m 32 s RX Icom IC-756 PRO III with MW mods Drake SW8 & ERGO software Sony 7600D, GE SRIII, Redsun RP2100 BW XCR 30, Sangean 803A. Antenna's RF Systems DX 1 Pro Mk II, Datong AD-270 Kiwa MW Loop, PAORDT Roelof mini-whip http://www.dxing.info/about/dxers/plimmer.dx That's key-down CW right? Worst case? If you're going to be just listening or working SSB your power consumption will be much less. Probably drawing at *least* 2 amps on receive. And, that puppy is capable of 200 W output. With transceivers that put out only 100 W one had best have *at least* a 20 amp supply. I realize that the '7700 is not capable of DC operation, but that gives you some idea of power consumption. Just a thought, but you might peruse the Universal catalogue and look at the power consumption of *similar* rigs. dxAce Michigan USA |
#5
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Power amps/watts consumption query?
dxAce wrote:
David wrote: wrote: I would be grateful for the advice of one of our technically minded members: The new radio I have coming merely states it's power consumption as 210VA, as it is a multivoltage radio. What consumption in watts/amps does this translate to at 240 volts AC mains? Also. if I used an inverter to drive it off a 12 volt DC battery, what would the power consumption in amps then be? A friend who helped me wrote: Watts = Volts * Amperes so 210VA = 210 Watts 210 Watts means 210 / 240 Amps which is .875 Amps. If you want to use a 12V battery, 210 Watts means 210 / 12 Amps or 17.5 Amps. This assumes the AC supply is as efficient as the DC supply. It won't actually be quite as efficient, so you're likely to need fewer Amps, maybe 14 or 15 but that's a guess. Maybe you can ask as the DC current depends on their design which is not known to us yet. Those numbers look very high to me. I suspect they've made a little mistake. I replied: it does seem very high to me for 210VA. at 240 volts AC mains. As just a poor guess I would estimate 0.5 amps at 240 volts AC mains and 8 amps at 12v DC but I cannot calculate it. _______________________________ So what do the experts out there think? Would be grateful for your help. John Plimmer, Montagu, Western Cape Province, South Africa South 33 d 47 m 32 s, East 20 d 07 m 32 s RX Icom IC-756 PRO III with MW mods Drake SW8 & ERGO software Sony 7600D, GE SRIII, Redsun RP2100 BW XCR 30, Sangean 803A. Antenna's RF Systems DX 1 Pro Mk II, Datong AD-270 Kiwa MW Loop, PAORDT Roelof mini-whip http://www.dxing.info/about/dxers/plimmer.dx That's key-down CW right? Worst case? If you're going to be just listening or working SSB your power consumption will be much less. Probably drawing at *least* 2 amps on receive. And, that puppy is capable of 200 W output. With transceivers that put out only 100 W one had best have *at least* a 20 amp supply. I realize that the '7700 is not capable of DC operation, but that gives you some idea of power consumption. Just a thought, but you might peruse the Universal catalogue and look at the power consumption of *similar* rigs. dxAce Michigan USA Seems a tad on the wasteful side. |
#6
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Power amps/watts consumption query?
On Feb 9, 1:45*pm, David wrote:
dxAce wrote: David wrote: wrote: I would be grateful for the advice of one of our technically minded members: The new radio I have coming merely states it's power consumption as 210VA, as it is a multivoltage radio. What consumption in watts/amps does this translate to at 240 volts AC mains? Also. if I used an inverter to drive it off a 12 volt DC battery, what would the power consumption in amps then be? A friend who helped me wrote: Watts = Volts * Amperes so 210VA = 210 Watts 210 Watts means 210 / 240 Amps which is .875 Amps. If you want to use a 12V battery, 210 Watts means 210 / 12 Amps or 17.5 Amps. This assumes the AC supply is as efficient as the DC supply. It won't actually be quite as efficient, so you're likely to need fewer Amps, maybe 14 or 15 but that's a guess. Maybe you can ask as the DC current depends on their design which is not known to us yet. Those numbers look very high to me. I suspect they've made a little mistake. I replied: it does seem very high to me for 210VA. at 240 volts AC mains. As just a poor guess I would estimate 0.5 amps at 240 volts AC mains and 8 amps at 12v DC but I cannot calculate it. _______________________________ So what do the experts out there think? Would be grateful for your help. John Plimmer, Montagu, Western Cape Province, South Africa South 33 d 47 m 32 s, East 20 d 07 m 32 s RX Icom IC-756 PRO III with MW mods Drake SW8 & ERGO software Sony 7600D, GE SRIII, Redsun RP2100 BW XCR 30, Sangean 803A. Antenna's RF Systems DX 1 Pro Mk II, Datong AD-270 Kiwa MW Loop, PAORDT Roelof mini-whip http://www.dxing.info/about/dxers/plimmer.dx That's key-down CW right? *Worst case? If you're going to be just listening or working SSB your power consumption will be much less. Probably drawing at *least* 2 amps on receive. And, that puppy is capable of 200 W output. With transceivers that put out only 100 W one had best have *at least* a 20 amp supply. *I realize that the '7700 is not capable of DC operation, but that gives you some idea of power consumption. Just a thought, but you might peruse the Universal catalogue and look at the power consumption of *similar* rigs. dxAce Michigan USA - Seems a tad on the wasteful side. David, It's a Transceiver that has both the Receive and Transmit Sections {Except maybe the Finals} Powered-Up {Active} or in Stand-by {Waiting} all the time that the Transceiver as a 'unit' is turned ON. If as JP has said : That he can Lock-Out {Shut-Down} the Transmitter Section then he may be able to reduce the Receive Power Consumption in the Stand-by Mode. Rx Stand-by 200 VA (typ.) {Receive Only Listening Mode} Max. Audio 210 VA (typ.) {Receive Only Maximum Audio Output} I have to think that about have of the Power being used in the Stand-by Mode is Transmitter specific and if the Transmitter Section could be De-Powered; then the overall Power Consumption could be reduced for "Receive Only" use. ~ RHF |
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