[R-390] Query about R-388

[jhhaynes at earthlink.net]

On Sun, 5 Aug 2007, Kenneth G. Gordon wrote:

> On 5 Aug 2007 at 20:54, Charles A Taylor wrote:
>
>> What I MEANT to ask is the Collins civilian equivalent to the R-388.
>
> 51J4
>
Isn't it the 51J3?  The R-388 I have came without mechanical
filters, and I believe the 51J4 has mechanical filters.  Believe
there might have been a plug-in kit to add mechanical filters
to the 51J3.

Jim W6JVE