Redi Rad is the low cost solution for connecting the phone or tablet to the existing car radio. They work well and everyone I know that has one is satisfied.
The downside is sound quality. A radio conversation is basically a modern Kenwood radio adapted to the old hardware controls. They sound...
I use a fine wire to close the gap in the gear and then JB Weld to keep it all together.
About 90% of the time fresh capacitors bring these back to life. The other times are new clutch for the tuner, output transistor, or phonelic circuit board crack.
The audio amplifier can become unstable and oscillate if voltage dips under 8, or 9V or so. A brief interruption in voltage to the amplifier can also make it take off and sing.
May be driving around is aggravating a loose connection in the feed or ground?
Since the radio has been serviced I'm...
I have used the LM7805 and Tobsun with good results, but keep in mind you get short circuit protection with the rt-eng.com solution. Also, the rt-eng.com solution is not a linear regulator, but rather a switching circuit similar to the original mechanical IVR. They did some great engineering...