shogun700

No elbow grease, jsbarrie has the right idea. I used a big ziploc bag but I think I like his plastic wrap idea better, the ziploc is a little translucent and there's the label on one side that shades things a bit. 40 Volume Creme Developer is the stuff, can't remember what brand I have. It works great on KLH knobs also but keep it off the brown center insert, it will bleach that right out. Oops... Great tip about putting it on thick, and I didn't realize you could leave it on that long. Will try that next time.

Nice tidbit of info bhart-I'll fearlessly hook up both speakers-once I get it all back together. Here's a photo of the unrestored radio next to a whitened-with-hairdresser-peroxide speaker cabinet. I'd say it's 90% white/back to original.

Kent, thanks for your response. Your logic makes sense, you'd just think if it was as simple as hooking it up through the same jacks they would have just said so right in the instructions! Either they wanted to avoid people hooking up random speakers, or they really did need to be connected in series. I'm sure we will figure it out in due time, for now I'll just use one speaker.

Hello, and thank you, this thread has been informative. I have an Advent 400 and a couple speakers, as well as the original manual. The list of caps will be handy, I'll be doing mine eventually. Fortunately my radio works very well and has a nice faceplate, but unfortunately the person who shipped it to me faced the knobs of the tuner toward the somewhat delicate grille of the speaker and dinged it up a bit, it was mint. All have yellowed cabinets, but I've managed to fix that without a lot of elbow grease-more on that in a sec. First, a question: In the instruction manual for the radio, mention is made of hooking a second 400 speaker up, but no information is given as to how to do this, it says those instructions are available with the purchase of an accessory speaker. Does anyone know how? It would be handy to have two speakers running. As for whitening the cabinets, I've used creme developer from the hairdresser shop and several hours of bright sunlight, the yellow fades nicely. I have only done one speaker (too busy enjoying the radio to pull it apart yet) and I'd say it's 80% back to white, the interior of the cabinet makes for an easy comparison. I will try and get some pics tomorrow. It's sort of hard to believe how well it works. I read somewhere that people add a little oxyclean as a catalyst, might try that also. If nobody has done so already I'd be happy to scan/upload the manual for the radio. It's informative and very much in the Kloss/KLH style.

Hello, I'm in the process of working on one of these now, this thread has been helpful, although finding it before ordering capacitors would have been better. Regardless, hours of messing around trying to stretch the cloth have been avoided, and the other tips and info are much appreciated. Thanks.