[TenTec] Argonaut V/516 Supply Voltage sensitivity. >=12.0Vdc

[Gary Hoffman]

I assume the "battery booster" products you are referencing are simply
DC to DC converters.  They take whatever power is available and level
shift the voltage up to 13.8.

That's fine, if you get stuck and have no other way out.  But be advised
that
these devices lose energy in the conversion process... its basic
thermodynamics.  And so, if you leave it on whenever you use the radio, you
will waste more energy and in the final analysis the battery will go dead
sooner.

Just a thought.

73 de Gary, AA2IZ


----- Original Message -----
From: "Thomas Jednacz" <tjednacz@ieee.org>
To: "Ron McConnell" <rcmcc@earthlink.net>; <tentec@contesting.com>; "Ten-Tec
Argo V/516" <ten-tec516@yahoogroups.com>; "HFPack" <hfpack@yahoogroups.com>;
"QRP-L" <qrp-l@lehigh.edu>; "QRPp-I" <QRPp-I@yahoogroups.com>
Cc: "Leo W4RRY Lehner" <w4rry@fastq.com>; "W2IOL" <w2iol@arrl.net>;
<n4uau@arrl.net>
Sent: Friday, November 01, 2002 2:08 PM
Subject: RE: [TenTec] Argonaut V/516 Supply Voltage sensitivity. >=12.0Vdc


> Do not dispare! Here is the solution. The 706 and the FT-100 both have the
> same problem. I found a battery booster that solves the problem and works
> GREAT. W4RRY at L&L Electronics has a battry booster made for just this
> occation. His e-mail is W4RRY@fastq.com - he has advertisements in World
> Radio magazine.
>
> I found that I can have the battery as low as 10 volts and not have a
> problem with the rig.
>
> Tom, W7QF
>
> -----Original Message-----
> From: tentec-admin@contesting.com [mailto:tentec-admin@contesting.com]On
> Behalf Of Ron McConnell
> Sent: Friday, November 01, 2002 12:53 PM
> To: tentec@contesting.com; Ten-Tec Argo V/516; HFPack; QRP-L; QRPp-I
> Cc: Leo W4RRY Lehner; W2IOL; n4uau@arrl.net
> Subject: [TenTec] Argonaut V/516 Supply Voltage sensitivity. >=12.0Vdc
>
>
>
> "...12.1 v at which point the signal has a
> pronounced chirp on CW."
>
> "...audio becomes distorted also..."
>
> And finally,
> Ten-Tec says, "...12V is the lower limit..."
>
>   (sigh)
>
> I still plan to get an Argonaut V/516,
> but I am a bit disappointed in this outcome.
> My plans are to shift the SGC SG-2020
> to full time portable/mobile use
> because of its rugged, brick-like construction
> and use the Argonaut V for my desk rig.
>
> My main complaint with the SG-2020 is that
> it is not small (12Vdc, 7AH) gel-cell battery
> friendly, even at qrp xmit levels.
> Any momentary slip below 12.0Vdc results
> in distortion. Now it seems the Argonaut V
> has the same characteristics.  I use a
> 17AH battery for home that I keep on float,
> so hopefully the Argo V will be happy.
> I expected that with all the DSP horsepower
> that 4AH batteries or smaller probably
> would not be realistic, but 7AH or even larger?.
>
> For the SG-2020, I ended up using one of
> W4RRY's battery boosters to keep the voltage
> at 13.8Vdc.  http://www.fastq.com/~w4rry/
> When I get around to using the Argo V portable,
> it looks like it will be better off with a boost, too.
>
> 73,
>
> Ron McConnell
> w2iol
>
>
>
>
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