Does your GQ become more stable when the the batteries wear out?

[Anonymous]

I have been using a custom high voltage battery pack since I got the GQ and I find that I have to tune down the reject much more than others I know.
I have a friend that has used an 8 cell nimh pack on his GQ with great success. When he switched to an alkaline battery pack, which has a higher voltage, he noticed that the GQ was unstable with his usual settings.
Is it possible that high voltages can cause the GQ to be more sensitive interference. And lower voltages make it more stable?
JT

 

[Anonymous]

I have never noticed such happening.
Using 8 NiMH cells would only give the unit 9.6 volts to start with, and the low voltage cut off point is 8.5 volts. Perhaps because of the drop in voltage, the overall performance of the unit is dropping off due to the low voltage when the cells drop down. One only has about 1.1 volts leeway here using those cells. With alkaline cells you have 3.5 volts head room.
Mr. Bill

 

[Anonymous]

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[Anonymous]

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[Anonymous]

What may be happening here is that there is a small pulse rate change at the different voltages. If there is a local interfering signal, then this small change may be enough to cause the detector to shift off a quiet point, to one that is giving a bit of interference. All that is usually necessary is to alter the REJECT control by just a hairs breadth, to shift the pulse rate back to a quiet setting. This small amount will not noticeably affect the unit's sensitivity.
This comes about because all of the pulse generator circuitry is powered direct from the battery voltage. Only the receiver supplies are voltage regulated.
Eric.

 

[Anonymous]

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[Anonymous]

my GQ is much more stable. I cannot remember when I had such a smooth threshold. My bad for using a high voltage batt pack from the get go. It worked wonders on my Whites PI. Southern California is now my oyster.
The difference in the REJECT setting between the 12.4 volt lithium battery pack and the 9.6 volt nimh pack is from -1/3 to 10us. I can see why in some place where you run the GQ on full, you may want the alkalines (or maybe a custom high volts pack). But in S. Ca, I think bringing it down a notch makes for a smooth running machine.
JT

 

[Anonymous]

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[Anonymous]

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[Anonymous]

Jim,
Purchased the batteries and charger locally (Australia).
The batteries are Sanyo NiMH (2100Mah). Probably the best rechargeable batteries on the market, which is to be expected as Sanyo came up with the idea in the first place. Other top brands are relabelled Sanyo's, something that many people don't know.
The charger is from Powertech (not sure if you can get this one in the USA, but there are plenty of equally good ones) and can charge up to 10 AA or AAA cells (Nicad & NiMH)...a great feature. It has all the stuff you will ever need (Smartcharger, Trickle, Discharge for Nicads, etc), but it is not a quick charger as I refuse to use these !! A full charge cycle can be up to 18 hours if the cells are fully depleted. The batteries never get hot, just warm, which is really how things should be.
I get 20+ hours on a full charge <img src="/metal/html/smile.gif" border=0 width=15 height=15 alt="">
Tony. <IMG SRC="/metal/html/ausflag.jpg" BORDER=0 width=32 height=17 ALT="au~">

 

[Anonymous]

MAHA makes good chargers and conditioners, check there website at mahaenergy.com. I would not recommend using Nexcell batteries, have known several people to have problems with them.

 

[Anonymous]

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[Anonymous]

Check this supplier <img src="/metal/html/wink.gif" border=0 width=15 height=15 alt="">