Re: [Elecraft] 14 volt batteries?

- after we picked ourselves up off of the floor. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil Kane Sent: Monday, August 21, 2017 8:39 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] 14 volt

Re: [Elecraft] 14 volt batteries?

...@mailman.qth.net] On Behalf Of Jim Brown Sent: Monday, August 21, 2017 12:17 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] 14 volt batteries? Right on! For about a year, I've been running the radios in my shack from a 10Ah LiFePO4 battery from Bioenne Power. I never see the voltage

Re: [Elecraft] 14 volt batteries?

On 8/20/2017 7:10 PM, Don Wilhelm wrote: > More recent battery technology have produced a number of batteries with > different voltages, but most ham gear has stayed with the voltage > commonly available in a vehicular mobile environment.  That is just "the > fact of the matter". Commercial

Re: [Elecraft] 14 volt batteries?

4S Lipos. Lipo cells are 3.7 V nominal. So 4 in series would be 14.8 Volts. Sent from my iPhone ...nr4c. bill > On Aug 20, 2017, at 8:19 PM, Robert Sands wrote: > > Why are we stuck with 12 volt batteries of all types when the rigs are > optimal at 13.6 or 14 volts?

Re: [Elecraft] 14 volt batteries?

Most rigs are designed for a range (13.8V +- 15%). IMD3 are better at higher voltage, but excellent IMD3 with predistortion can make this point moot. Many computer chips operate at 1.5V, and conversion from 12V is normal. Expert amp 1.3k operates at full power from 90 to 270V. Apache 8000 has

Re: [Elecraft] 14 volt batteries?

On 8/20/2017 5:46 PM, Chris Parfitt wrote: I agree, LiFePO4 4S batteries should be charged to around 13.2, with 12.6 volts being nominal. 14.2V for full charge is more like it. And you're right that they should NOT be charged much above that, which is why chargers specifically designed for

Re: [Elecraft] 14 volt batteries?

On 8/20/2017 5:21 PM, Tox wrote: Many "12v" batteries are actually 13.2-13.8 when fully charged Not after you've disconnected the charger. And the voltage drops VERY quickly as they discharge. With 90% charge remaining, they're close to 12V! 73, Jim K9YC

Re: [Elecraft] 14 volt batteries?

Right on! For about a year, I've been running the radios in my shack from a 10Ah LiFePO4 battery from Bioenne Power. I never see the voltage drop below 13V on the K3 voltmeter. 73, Jim K9YC On 8/20/2017 6:08 PM, Rick WA6NHC wrote: Look at LiFePO batteries. The charging needs are specific

Re: [Elecraft] 14 volt batteries?

Bob, For a long time, rigs were designed for the nominal voltage obtained from a fully charged Lead Acid battery which is 13.6 to 13.8 volts when fully charged. Think automotive batteries and mobile operation - that has been the design point for transceivers in the 100 watt and under class.

Re: [Elecraft] 14 volt batteries?

Look at LiFePO batteries.  The charging needs are specific (meaning you'll have to make an investment), but they'll maintain voltage (13v+) until they can't, a very sharp knee. Rick nhc On 8/20/2017 5:19 PM, Robert Sands wrote: Why are we stuck with 12 volt batteries of all types when the

Re: [Elecraft] 14 volt batteries?

I agree, LiFePO4 4S batteries should be charged to around 13.2, with 12.6 volts being nominal. LiPo 4S batteries have a nominal voltage of 14.8, but are fully charged at 16.8—too high for most transceivers. I have seen examples of people using various methods to decrease the voltage under 16.

Re: [Elecraft] 14 volt batteries?

Many "12v" batteries are actually 13.2-13.8 when fully charged On Sunday, August 20, 2017, Robert Sands wrote: > Why are we stuck with 12 volt batteries of all types when the rigs are > optimal at 13.6 or 14 volts? Anyone know of a 14 volt battery mfg? My > search yields

[Elecraft] 14 volt batteries?

Why are we stuck with 12 volt batteries of all types when the rigs are optimal at 13.6 or 14 volts? Anyone know of a 14 volt battery mfg? My search yields zero. Bob K7VO __ Elecraft mailing list Home: