07-01-2014, 08:28 PM
It's been a while...still things to do around the house, new kitten, etc., etc. ...but in between all that, I've slowly been rebuilding the 37-690 amp chassis.
It is almost finished!
Rebuilt electrolytics, rebuilt bakelite blocks, new resistors.
The 3000 ohm section of the voltage divider resistor (177), a dual 3000 ohm / 2240 ohm Candohm, had failed at some point in the past. Someone bridged a 3000 ohm resistor across the terminals of the 3000 ohm section of (177). Bridging resistors across failed Candohms can be disastrous, so both sections have now been replaced with 50 watt chassis mount resistors. No doubt the 50 watt rating is overkill, but these should be good to go for the next few - if not the next several - decades.
The woofer and tweeter cables were very dry and crumbling, so I made new wiring harnesses for these.
I took a new photo of the underside of the chassis but Photobucket isn't working at present, so I'll post the photo later.
I'll try the set out over the upcoming three day July 4th weekend. If all works as it should, the next move is a full alignment, and then the set will be ready to go home.
It is almost finished!
Rebuilt electrolytics, rebuilt bakelite blocks, new resistors.
The 3000 ohm section of the voltage divider resistor (177), a dual 3000 ohm / 2240 ohm Candohm, had failed at some point in the past. Someone bridged a 3000 ohm resistor across the terminals of the 3000 ohm section of (177). Bridging resistors across failed Candohms can be disastrous, so both sections have now been replaced with 50 watt chassis mount resistors. No doubt the 50 watt rating is overkill, but these should be good to go for the next few - if not the next several - decades.
The woofer and tweeter cables were very dry and crumbling, so I made new wiring harnesses for these.
I took a new photo of the underside of the chassis but Photobucket isn't working at present, so I'll post the photo later.
I'll try the set out over the upcoming three day July 4th weekend. If all works as it should, the next move is a full alignment, and then the set will be ready to go home.
--
Ron Ramirez
Ferdinand IN
