Well,Gale, we're all here to help each other, and I too value this list
greatly.
There are many well-informed and patient people here, and I have made many
good friends over the years because of this list.
I suspect my slightly-reduced power for the TS590 is due to a voltage drop
of some sort as well, and will investigate the situation within the next day
or two.
Will keep everyone posted.
73 from Tom Behler: KB8TYJ
----- Original Message -----
From: "Gale Conard" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, June 25, 2011 11:07 AM
Subject: Re: Regarding Low Voltage
I don't often post, but I had to share this.
I have been following the dropped-power thread. (I want to thank all for
their suggestions, too.) I have been thinking for a couple of years that I
must have damaged my finals, or my TW1 needed calibrating, because my output
from the IC718 averaged about 50 to 60 watts.
After reading the thoughts about cleaning the fuses and holders, I decided
to try it, just out of curiosity. I didn't measure the voltage at the rig,
because that would be a major job in the crowded conditions of my operating
setup.
Anyway, after just taking the fuses in and out of the holders a few times, I
turned the rig on. The power levels on 80, 40, 30 and 20 increased by 20 to
30 watts.
I probably need to do more cleaning at the power supply, and any other
connections along the power cable, but I am very pleased with that
significant improvement, and it only took about fifteen minutes.
I really do value the discussions on this list.
Thanks, again.
----- Original Message -----
From: "tom behler" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, June 25, 2011 8:22 AM
Subject: Re: Regarding Low Voltage
Thanks very much for the thoughtful suggestions, Mike.
I'm collecting them here, and will revisit this issue after Field Day.
Everyone has been very helpful and patient with this thread, and I truly do
appreciate that. I'll let everyone know the results of further testing and
troubleshooting as I get them.
73 from Tom Behler: Kb8TYJ
----- Original Message -----
From: "Mike Duke, K5XU" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Saturday, June 25, 2011 8:38 AM
Subject: Regarding Low Voltage
In some cases, the voltage drop can be enough to cause other functions
of the radio to misbehave, or to not work at all.
In my case, the push button for the voice read out became
intermittent. That was what tipped me off that I had a problem
somewhere.
Someone suggested that I check the voltage, and I hit pay dirt.
If, after cleaning the connections and fuses, you still have low
voltage at the radio, you can turn up the output of the Astron supply.
But, do this only if the 590 is the only thing connected to it, or if
everything connected to the rig runner is experiencing low voltage.
Otherwise, you may fry some other piece of equipment in the process of
correcting the problem for the 590.
I'm glad Lou thought to mention cleaning the fuses. I completely
forgot about doing that when I had my problem.
Sometimes simply reseating the flat blade fuses is sufficient to
correct the contact problem, especially for a new power cable.
The traditional round glass fuses and holders are more apt to develop
contact issues. As the surface area of the contact point diminishes
due to carbon, dust, or whatever, a resistance develops. That
resistance is what causes the voltage to drop. It can also cause an
increase in the amount of current drawn by the rig. That too can be a
factor if you are pushing a power supply nearly to its limit.
Mike Duke, K5XU
American Council of Blind Radio Amateurs
73,
Gale
[log in to unmask]
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