[TenTec] boost mobile voltage?

[WA3FIY]

Bob,

Here is what I THINK might happen with a 65 AH battery.   I 
collected a bunch of data last year prepairing for field day and the 
Corsair was among the ten rigs I measured.   All data was collected at 
40 meters.   Current drain may vary some on other bands.  I tested 
the following:

Century 22, Argonaut 515, Argonaut V, Argosy, Argosy II, Corsair II, 
Omni D series C, Jupiter, Paragon and Omni VI.

I built a spread sheet to crunch all the numbers and the following 
table is what I got for the Corsair II.

I use 50 % of the nameplate battery capacity, as the terminal voltage 
drops below useful (except in emergency cases) level, hence, your 65 
AH battery becomes 32.5 AH in a real case.

I hope the chart reproduces OK.  If not, please let me know.

Transmit Duty Cycle	50%
Battery Cap (Ahrs)	32.5
					Corsair II
								
		RX	TX 	2W	5W	20W	50W	100W
			(Stby)
Amps		0.92	1.70	3.00	4.10	6.80	9.60	13.00
							
CW Average Current		1.21	1.49	2.16	2.86	3.71
CW Amps per Watt		0.61	0.30	0.11	0.06	0.04
CW Run Time			24.2	19.7	13.5	10.2	7.9
							
SSB Average Current		1.64	1.91	2.59	3.29	4.14
SSB Amps per Watt		0.82	0.38	0.13	0.07	0.04
SSB Run Time			17.9	15.3	11.3	8.9	7.1

>From my testing, it looks like the Argosy (either model) and the Triton 
IV are the best choice for extended battery operation.  In 100 watt 
rigs, the Corsair comes in second and the Omni VI last place.  Of 
course, there are many parameters to consider beside battery 
consumption.
	
73 de Lee, WA3FIY

On 26 Apr 2005 at 7:30, Bob Stephens wrote:

> Please let me clarify this.
> 
> The 7 hr gel cell was only a test. I wanted to make one or two contacts to 
> see if it would be worthwhile to buy a larger battery. The fully charged, 
> almost brand new battery failed the test in the first minute.
> 
> The question has changed. I plan to purchase a deep cycle marine battery 
> tonight. The 90 amp hour version will be somewhat hard on my weak back, 
> although I could carry it around if I'm careful. The question now is : 
> would a 65 amp hour deep cycle marine battery power a Corsair for at least 
> 5 hours in SSB assuming I'll be listening for at least 50 % or more of the 
> time?
> 
> 73 -Bob KB1CIW
> 


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