[Drake] TR7 R7 NB Dummy Board

[Garey Barrell]

John -

I don't have an extra board, but the difference between the boards is 
that the TR-7 version has diode switches to handle the "transmit" 
direction signals.  The R-7 board doesn't need these. 

The TR-7 board has two PIN diodes, 4 RFCs and several passive Rs & Cs.  
The R-7 board has only a single PC trace from a connector pin to a coax 
receptacle near the top of the board.

73, Garey - K4OAH
Glen Allen, VA

Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs
<www.k4oah.com>



John Chesley wrote:
>
> Hi,
>
>  
>
> Does anyone have a NB Dummy board for a TR7 they can spare?  Also, can 
> anyone tell me what the differences are between the NB dummy board in 
> the TR7 and the NB dummy board in the R7?  Thanks for any advice.
>
>  
>
> John, AK3Z
>
>