[martin.m]

Ken and Andrew, thank you for your comments. I had never heard of Hacker radios before joining this forum. They must have been expensive when new. The big speakers and 18 volt supply rail certainly make a difference to the sound. Thanks for the tip about touching up the speaker grille with a black marker pen. I tried this with one of my Democrats and it has worked well. I've noticed that with these radios the volume control only need to be turned about 20 degrees for the sound to be really loud. I was thinking of adding a resistor in the top end of the control to make setting the volume level easier. (This would not have bothered me when I was a teenager)