I recently acquired a pair of North American Signal Co. model DFS900-A strobe beacons. They are self contained and designed to double flash. One does as it it should but the other seems to have a problem. When I give it power it takes about 30 seconds before it starts flashing. It will only single flash and its flash rate is about once every 5 seconds. It takes about 5 minutes to reach that flash rate. Even then the flash rate is inconsistent. I took it apart and it’s pretty clean with no obvious clues to where the problem lies. I’m curious if it’s fixable at a reasonable cost? Is there anyone on this website who repairs this type of light? Thanks in advance for any help.
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