SDU-5/E BA-1574 Distress Strobe Light Batt Adapter 5BA For Sale

SDU-5/E BA-1574 Distress Strobe Light Batt Adapter 5BA
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SDU-5/E BA-1574 Distress Strobe Light Batt Adapter 5BA:
$19.50


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I make these in the U.S.A.

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See About Me for background information on Brooke Clarke, N6GCE.On Apr-03-02 at 22:52:03 PST, seller added the following information:

This is a new selling format that allows you to "Buy Now" and I get to list multiple items.

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SDU-5/E Battery Adapter 5BA© Brooke Clarke, N6GCE 2000 - 2018
Engraved TopStands on CapGeneral Information This is a cap designed to fit the SDU-5/E Distress Marker Light and allows the use of readily available type 123 commercial photo batteries. Photo installed on SDU-5/E Strobe

It turns out that the adapter allows the SDU-5E to stand on it's end without any batteries, the BA-1574/U is shorter and the SDU-5/E falls over. When batteries are installed it will stand on just the cap.

Positive end of Lithium battery goes to the cap. Tested with either Duracell or Radio Shack 123 batteries. 2 each Duracell DL123A or CR123. You can use a pair of any of the 123 photo batteries, but do not use the new rechargeable type because their shelf life is very short. The rechargeable batteries should be OK for use in a disco situation where you're not concerned about shelf life.
Threads Notice

23 May 2007 -About 1 in 1,000 SDU-5s have threads that are undersized. This happens when the tap used to make the strobe gets worn out. To check the threads in the strobe I now have a certified Go-NoGo plug gauge (shown at left laying on it's Calibration Certificate) and in case the threads need to be chased I also have the needed bottom tap. If you buy my adapter and find that your strobe has defective threads I will clean them up for the current cost of postage. This applies to all past customers just send me the strobe and the cap. If you have tight threads contact me.


O-Ring Notice BA-1574 Gap5BA GapLess than 1% of the time an SDU-5/E is made with a defective female battery thread that will cause the battery to make contact before the O-ring. If you install the BA-1574/U or BA-5374/U in these units the O-ring will not seat properly. If this happens to you let me know and I will send you a part to fix it (no charge).Not TestedI have not tried to certify this adapter to any specifications or get any approvals for it. I know of no problems but, if you use it for life saving applications you do so at your own risk.Battery LifeThe LiMnO2 DL123A is rated at 1.4 AH with a 100 Ohm load., The SDU-5/E pulls about 100 mA (12V/100 mA = 120 Ohms) so might last 14 hours. The BA-1574/U is rated for only 9 Hours at 80 deg F, so this adapter may offer over 50% more capacity.

The booklet in the bottom of the BT-2B battery tester shows the effect of cold on Mercury batteries. At 80 deg F and a meter reading of 1.0 there are 9 hours operation in the battery, but at 32 deg F there is only 30 minutes of operation. The LiMnO2 battery looses only about 10% capacity at 32 deg F. Note the BT-2B tester is obsolete since all the batteries it was made for are Mercury types and the replacements are different chemistry and can not be easily tested.

Some Sources for BatteriesThe 123 type of photo battery is sold in camera and drug stores and most supermarkets as well as on the internet. They typically are blister packed in either singles or doubles (two are required for this application). Shop them as the price varies a lot. Last I heard Streamlite had a good deal on a box of 12. If you have access to military supplies your local PX probably stocks the BA-5123 batteries for the Streamlite flashlights.
New Version 2
As of 12 April 2004 Engraved adapters are the only ones available. New Price
I have not changed the price for a couple of decades. My costs have gone up so am raising the price a few dollars.
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