[TVARC] Battery operation

[Earle]

It’s a rough crowd. But what’s the answer?

E

Sent from my iPhone

> On May 13, 2018, at 6:42 PM, doncrosby at aol.com wrote:
> 
> Earle
> 
> I just ran quick test readings using my 7300.  Receiver current is 1a. @ 12.6vdc.
> 
> Average current on "SSB Talk" while reading "Key Down" current on CW with my 7300:
> 
> Power Level       10w        30w       100w
> SSB                      4a           5a           7a
> CW                       6.5a        9a          16a
> 
> Licenses... 
> I have some extra dog licenses and would part with them except that you fail to qualify because of poor spelling.
> 
> Honorary is a more better than Honerary me thinks.
> 
> 73
> Don w1ejm
> 
> 
> 
> -----Original Message-----
> From: Earle D Hancock <earleiphone at gmail.com>
> To: villages reflector <tvarc at mailman.qth.net>
> Sent: Sun, May 13, 2018 5:27 pm
> Subject: [TVARC] Battery operation
> 
> Good evening all,
> 	I am planning to build (really assemble) a go box for VHF/UHF and HF radios.
> 	The specs for the HF (Icom 7300) call for 21ah in transmit and .9ah in standby.
> 	I figure transmit time of approximately 30%. So 1 hour of operation would seem to call for 7 to 10 ah transmit and approximately .6ah in standby for a total each hour of operation of 8 to 12ah. In 24 hours (the goal with out any charging) that’s 288 ah.
> 	The specs for the Yaesu 400 call for 10ah in transmit and .5ah in standby. Again estimating 30% transmit time that’s 3 to 4ah transmit for every hour of operation. In standby it works out to less than .3 ah. In 24 hours (again the goal) thats 104ah. All math is rounded up, again figuring safety margin.
> 	I would appear that I need to have a battery that would handle 392ah to handle a period of 24 hours.
> 	If, by some weird chance, I have calculated correctly, and again figuring in a safety margin, I need a battery with a 500ah rating or better.
> 	Your thoughts?
> 
> 	BTW: if I am correct I believe I should be awarded an honerary extra license.
> 
> E 
> Earle KM4ISN
> earleiphone at gmail.com
> 
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