[Collins] 312 change over

[Dr. Gerald N. Johnson]

Since the rest of the case and the power supply chassis were aluminum, 
it was probably aluminum with a cutout to match the speaker cone.

73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.

On 5/22/2011 6:21 PM, yash at aol.com wrote:
>
>
>   Pulled my 312 enclosure apart and did a complete refinish on all of it parts. Iam going to change it over to a 312B for speaker and power supply. The backing behind the front grill ,behind the grill face was a black card board panel. In the supply/ speaker use of the 312 ,what was the panel made from that the speaker was attached to?
> thanks
> dale wt4t
>
>