[Drake] NB7-NB7A Question

[Lars E. Pettersson]

On Thursday 30 January 2003 06:36, N8KDV wrote:
> What is the difference between the NB7 and NB7A noise blankers? I have
> both. Is one considered better than the other, and why?
>
> I can see that the NB7A has a crystal mounted on it, and the NB7 does
> not.
>
> Steve
> Holland, MI
>
> n8kdv@iserv.net

Short answer; NB7 is for the TR7, and the NB7A is for the R7.

Looking at the schematics for them I can only see one difference, and that 
is the filter. So I do not think you will break anything by inserting the 
NB7A into the TR7 (but don't take my word for it :-) but perhaps the gain 
distribution will be wrong. The filter will only be used in RX mode, not 
TX.

Wonder why they used two versions... Anyone who knows? Cost reasons?

73 de Lars, sm6rpz

-- 
Lars E. Pettersson, SM6RPZ
Gothenburg, SWEDEN
sm6rpz@home.se
http://www.gbg.bonet.se/cassegrain/