开云体育

Sorry if this is in the faq. I looked and didn't see it. Has anyone
checked voltage out versus power out? At what voltage does the power
start to drop off? The reason I ask is I am thinking of bundling a
group of 4 or 5 of the radio shack 9.6V 1600 maH battery packs
together in parallel to make a field battery pack. But my latest
experience with them makes me wonder if I would be better off with a
12V battery. The power out (based upon signal reports) seemed to drop
off rather quickly while using the battery packs.

Thanks in advance,
72,
Keith
N1XTK

Hi Keith,

Beware putting battery packs in parallel! Not a good idea.

Let me offer you a thought that I have put into practice. I put onto
the power cord to the FT-817 the mating Molex connector to the one
that the RS battery has on it. I cut the power cord to about 9" to
reduce the voltage drop over the cord. I also put the same Molex
connector that is on the battery pack on the output of my AC power
supply. You may now use a cable clamp mounted on the groud post to
keep any strain off of the power jack/plug. When I want to work using
the AC supply, I just plug it into the Molex connector. If the
internal battery dissipates, then I just plug in a RS pack into the
external Molex connector (but just a single pack). I keep the
internal battery pack and two extras in my travel kit.

Hope that made sense. :-)

72 de Barry - W4WB

--- In FT817@y..., krandino@s... wrote:

Sorry if this is in the faq. I looked and didn't see it. Has anyone
checked voltage out versus power out? At what voltage does the

power

start to drop off? The reason I ask is I am thinking of bundling a
group of 4 or 5 of the radio shack 9.6V 1600 maH battery packs
together in parallel to make a field battery pack. But my latest
experience with them makes me wonder if I would be better off with

a

12V battery. The power out (based upon signal reports) seemed to

drop

off rather quickly while using the battery packs.

Thanks in advance,
72,
Keith
N1XTK

Check out K6XX's 817 pages. There's a graph, in pdf format.


73, Doug

From: krandino@...
Date: Sun, 03 Jun 2001 18:31:05 -0000

Sorry if this is in the faq. I looked and didn't see it. Has anyone
checked voltage out versus power out? At what voltage does the power
start to drop off? The reason I ask is I am thinking of bundling a
group of 4 or 5 of the radio shack 9.6V 1600 maH battery packs
together in parallel to make a field battery pack. But my latest
experience with them makes me wonder if I would be better off with a
12V battery. The power out (based upon signal reports) seemed to drop
off rather quickly while using the battery packs.

Thanks in advance,
72,
Keith
N1XTK




To unsubscribe from this group, send an email to:
FT817-unsubscribe@... and for a great FAQ ( Frequently Asked Questions ) see



Your use of Yahoo! Groups is subject to

Barry,

That is exactly what I have now. I was thinking that by taking all of my
packs and putting them in parallel I would slow the voltage drop
considerably and keep my power output higher longer. I have never heard of
putting batteries in parallel as a problem. Could you elaborate please. I
don't know why this would be a bad idea.

Thanks for the response,

Also Doug thanks for your information also. I will look over those charts.
Looks like a great site! Thanks!

72,
Keith
N1XTK

I have never heard of
putting batteries in parallel as a problem. Could you elaborate please. I
don't know why this would be a bad idea.

Hi all,...

I don't see a problem in using multi pack in parallel; The PROBLEM is
trying to charge them in parallel!

Tom aa2vk


--
****
* Member of NORCAL, NJQRP, LIQRP, SGCI *
* K2 #1213 *
* LIQRP Web Page: www.erols.com/tjmc/liqrp *
* Personal web page : www.erols.com/tjmc *
****

Hi all,

Warning! Connecting NiCd batteries in parallel is definately a no-no!

Even without load, the charge can start bouncing between the
battery packs, sometimes leading to huge currents. I have seen
this strange behavior myself when a friend of mine put two
NiCd cells in a bicycle light that was designed for two alkaline
cells in parallel. The bike was left overnight and the next morning
the battery holder was molten down!

It's a completely different story with lead-acid batteries. They
don't exhibit this strange "charge bouncing effect".
They can used in parallel (assuming equal batteries!), even
during charging since they are charged with constant voltage.

73
Johan, SM6LKM

Hi
You would be better off using a 12v 7 or 8 Ah gel cell battery I use one with my FT817 and get about 4 days with 5 watts before the
battery voltage drops to 11 Volts.
73 Lionel VK3NM

krandino@... wrote: