[R-390] frequency counter connection point

[2002tii]

Frank asked:

>>where [to] connect a frequency counter to obtain a numeric value 
>>that would (approximately) track the Veeder-Root display on my R-390A.

These folks claim their digital display works with the 390A:

http://electronicspecialtyproducts.com/dd103.html
http://electronicspecialtyproducts.com/radio_list.html

They claim that data for "many receivers" is pre-programmed -- if 
that includes the 390A, you shouldn't have to program it for the 390A 
conversion scheme yourself.  You would still need to switch the 
bandswitch on the display to match the Mc setting on the 390A.

I have not seen the product and do not know anything about the supplier.

Best regards,

Don