Oval speaker for old radio

[janoch23]

I have an old, broken but beautiful 50's radio that I'm replacing the electronics in. Unfortunately the speaker paper cone has a hole in it, and I need to find a modern replacement *.

What is the best option? I'm thinking a small oval fullrange driver, since that's what the radio was made for. I will replace the baffle so the exact measurements isn't an issue.

However, I would like to get as good a frequency response as possible. The enclosure is approx. H30, D20, W40 (centimeters), and it is totally open; that is, the back is full of holes, there's a rocking lever switch mechanism sticking out, there are some weird hole for a radio antenna, etc.

Questions:

1. The open enclosure will probably yield a horrible response right? Would I be better of building a small closed or bass reflex box inside the original enclosure?
   
2. If not, what can I do to make the response as good as possible?
   
3. What would be a good, cheap driver?

(* The old one was a 15x21 cm oval Isophon with square outline mounting holes, approx. 13.2 cm between the hole centers. I don't think it's possible to find a replacement, and I'd rather go for something modern with better frequency response anyway)

 

[poynton]

Something like this :-

PIONEER TS-A6813I 6 X 8 CUSTOM FIT SPEAKERS on eBay (end time 21-Feb-11 17:44:32 GMT)



andy


.

 

[Cal Weldon]

Maybe a picture or two would help also. There's someone I know with a few of those kinds of drivers. I'll see if he's available. 😉

 

[Rullknufs]

Sounds like you have a radio similar to my AGA.
If you're interested you can check this Vintage AGA Radio - Minhembio forum

 

[planet10]

That particular isophon is not all that rare, don't know if i have a single or not. I do have 2 singles of the larger coax.

I also have at least 2 drawers of smaller ovals.

For a modern driver, a car driver designed to mount in the back deck koading into the trunk will likely work best in your open back box.

Pictures?

dave

 

[Knarf]

Sounds like you have a radio similar to my AGA.
If you're interested you can check this Vintage AGA Radio - Minhembio forum

Sorry to go OT on the thread, but your problems with the noisy pots are probably due to bad capacitors. *DO NOT* run the radio until you have replaced *all* of the capacitors with paper insulation. The tubes are probably OK.

 

[eyoung]

Elmers white glue is a godsend to paper cone repair if the spider and voice coil are ok ...if not then a modern car driver may be your best option cheaper the better as newer high wattage drivers may be inefficient...

E