I am not sure how the Johnson Systems retrofit electronics upgrade will solve a "dimmer noise" problem. Care to elaborate?
One person thought it was a fan, another thought it was electrical. Replacing the fan would have been a lot cheaper and may have solved the problem but the 30 year old electronics that were covered in hazer fluid and dust as well as the 25 year old DMX-AMX converter concerned me.
The replacement went in on Monday and all is good now. Took my LD friend all of 20 minutes to swap it out.