Quote:
Originally Posted by Reece
Wow, that chassis looks better than when RCA got done with it! Pet: at least the pet wasn't a mouse. Original: yep, the caps all look REALLY toasty and showing their age but the underside looks pretty clean. Speaker: the ePay speaker you show would have to be reconed so you'd have to add that cost in. Since he says it doesn't rub, it makes it easier. You can get cones of different sizes cheap from this source:
http://matelectronics.com/acatalog/M...ories_208.html
Only problem is they have a $25 min. order. Also these are modern cones with rubber surrounds and the old speaker might bottom out with such a flexy mount. I think I'd look around a little more and see if I could find a vintage speaker in better shape that didn't need reconing. In the meantime you could use a PM speaker for testing with a choke or big resistor ILO the field coil.
One other suggestion: it would be good to close off the bottom of the cabinet with a plywood shelf to serve two purposes: it would stiffen the cabinet, and it would provide a better baffle for the speaker. The way it is now, the back wave from the speaker has a short path around the bottom of the front baffle board and can cancel some bass from the front wave. |
Thanks for the advice. Wouldn't I need an impedance matching transformer to use a PM speaker ?