jsbarrie

I've had similar success with salon peroxide. I painted it on as thick as I could and then wrapped it in clear plastic wrap and left it in the sun for a couple of days. Looks like new. I'm now replacing capacitors and probably the two transistors under the heat sink. The circuit board under the transistors looks burnt. A friend said I should look upstream from the transistors too. (I'm in over my head with the electronics. We have "Fix-it-Friday" at the Maker Works where I have my office - lots of help)

Thanks for the fast response! I 'm going to digest this. I'm learning a lot about electronics and this project is way cool. I'm thinking of upgrading the voltage of the caps I replace to something just above what I take out. Anyone have experience soldering modern lead free solder onto the existing solder?

Hi- I am new to this group. I have a low volume and buzzy Advent 400. I started out with the table radio KLH model 21. Great sound for such a small radio. I love the look of the 400 and I want to get it up to spec. I've whitened the case using beauty salon hydrogen peroxide and sunlight. Worked like a charm. I can replace the caps, no problem. My next task is to take on the speaker. The 5.25" speaker in my cabinet is damaged. Possibly water damage. The elastic surround is deformed. I've replaced the gaskets on a pair of old speakers before. This one looks like the gasket is attached to the back side of the speaker and is thus very hard to replace. Q: is there a good quality but not too expensive replacement for this? Is there one that will match the existing screw pattern? I can cut a adapter plate on the laser cutter here at work if needed. Is the speaker 4 or 8 ohm? Any ideas of which direction to take this is most welcome. I will try to shoot a few photos of my project and get back to you all. Many thanks, John