Thanks guys for all the info and suggestions. At this time I do have a Ray-O Vac #903 – 7 .5 Volt battery coming, price not too bad about $19. However for the long term , it would be nice to have a 7.5 DCV power supply. Any thoughts as to any potential issues with the wave form from a typical power supply as opposed to a true DC from a battery affecting the Mertronic function?
Joe B
As long as the power supply you get has a 7.5 volt (or close) DC output and has some filtering built into it such as for use with a computer or other electronic equipment it should work fine. Mercotronic did offer a AC to DC power supply that was designed to actually fit inside the Mercotronic and had a selector switch that could be set for a 7.5 volt or 12 volt output. It also had a 110 volt receptacle so it could supply power to the Model 98 which requires 110 volts AC to perform some of the condenser tests – condenser value and condenser leakage and short. The unit we documented has an output voltage of 8.2 volts in the 7.5 volt setting and 12.7 volts in the 12 volt setting with nothing connected to it. A picture of it can be viewed in the 5th post of this thread on the Smokestack website. https://www.smokstak.com/forum/threads/merc-o-tronic-model-98-schematic-and-documentation-information.227737/
I have used this power supply with good results.
It was only $15.00 but that was over 10 years ago.
Do a search for-
Mean Well New GST40A07-P1J 7.5V Power Supply.
Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.