If you want to be on the safe side and protect the final amplifier
transistors, get the proper fast-acting breaker (sorry, I don't have the
Airpax number handy, but I might be able to find it if you need it). The
breaker can also be used as a switch (the front panel switch isn't husky
enough to handle the DC current on transmit, at least on high power.)
As to the question about whether the 7AH battery is enough capacity,
here's a
link to a spreadsheet you can download to calculate battery operating time
(courtesy of a good friend of mine, WA0ITP, of the Four State QRP Group):
http://www.wa0itp.com/battcalcrev12aug2001.xls
TNX/73, Al
On Sat April 28 2012 3:02:59 pm John wrote:
I am planning on taking my Argosy on the road this summer and will need
to make a new connection to utilize a 7 Ah battery (removed fire
detector stock.) Do I need to put a switch and current limiting in line
in this application or can I just utilize a 4 pin mate-N-Lock connector
using just the power connections. What have others done in regards to
portable power for the Argosy? If I stay at 5 watts is 7 amp hours
enough capacity?
As an aside, I am also putting together a portable vertical that will
cover 60M to 10M with enough adjustment range that a tuner will not be
required (AD5X design.) I am looking forward to seeing what I can do at
QRP power at lunch stops, rest stops or even radio stops.
-- John / WA1JG
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