12v 7ah / yaesu 817nd

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stanwendy
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12v 7ah / yaesu 817nd

Post by stanwendy »

Hi lads , Lots of different answers online and as with radio RX and TX it will only be a Rough guess, I have a yuasa 12v 7ah battery and linked it up to my yaesu 817nd and it was on for quite a few hours , Mixture of rx and tx , Anyway in the near future I'll be doing some portable use , How long roughly will the above battery last , Do I need to sort maybe a different type of battery , Jusf a rough guess would be fine, Thanks,
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Buick Mackane
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Re: 12v 7ah / yaesu 817nd

Post by Buick Mackane »

I went portable with exactly the same setup a few weeks ago and managed 24 hours run time this was using mostly the 2.5 watt setting. But i ran the battery well below 12 volts which you shouldn't really do as it can damage the battery. A freshly charged battery should read 12.6 volts and you should stop using it when it reaches 12 volts as thats roughly half of its capacity used up
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stanwendy
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Re: 12v 7ah / yaesu 817nd

Post by stanwendy »

Funny enough it was on 12.7v and finished off around 11.7v, It was however on the 5 watts but I will bear that in mind next time, I may take a multimeter with me so I can check how it's going, Next now is another homebase antenna to take portable , Thanks for the above.
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Buick Mackane
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Re: 12v 7ah / yaesu 817nd

Post by Buick Mackane »

stanwendy wrote: 14 May 2022, 16:15 Funny enough it was on 12.7v and finished off around 11.7v, It was however on the 5 watts but I will bear that in mind next time, I may take a multimeter with me so I can check how it's going, Next now is another homebase antenna to take portable , Thanks for the above.
The 817 has a built in voltage meter. When charging your 7ah battery do so at no more than round about one amp, A normal 4 amp (Or above) car battery charger will quickly kill your battery
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Buick Mackane
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Re: 12v 7ah / yaesu 817nd

Post by Buick Mackane »

stanwendy wrote: 14 May 2022, 16:15 Next now is another homebase antenna to take portable , Thanks for the above.
My portable antenna is a EFHW ran through a homebrew tuner, See link below for details, Works a treat.


viewtopic.php?p=553854#p553854
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Ant
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Re: 12v 7ah / yaesu 817nd

Post by Ant »

Buick Mackane wrote: 14 May 2022, 16:47
stanwendy wrote: 14 May 2022, 16:15 Next now is another homebase antenna to take portable , Thanks for the above.
My portable antenna is a EFHW ran through a homebrew tuner, See link below for details, Works a treat.


viewtopic.php?p=553854#p553854
If it's HW, why the tuner?
Shack, noun, a small building, usually made of wood or metal, that has not been built well - Oxford Dictionary
A shack (or, less often, shanty) is a type of small, often primitive shelter or dwelling - Wikipedia

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Buick Mackane
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Re: 12v 7ah / yaesu 817nd

Post by Buick Mackane »

Ant wrote: 14 May 2022, 18:28
Buick Mackane wrote: 14 May 2022, 16:47
stanwendy wrote: 14 May 2022, 16:15 Next now is another homebase antenna to take portable , Thanks for the above.
My portable antenna is a EFHW ran through a homebrew tuner, See link below for details, Works a treat.


viewtopic.php?p=553854#p553854
If it's HW, why the tuner?
Your right if it's the correct length then a tuner isn't needed, But it's good to have it when portable just to iron out any SWR problems caused by near by objects etc
The man who ate the boiled ham raw
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