I think you need to use the high position. On an archived Inrad web
page it says concerning the filter curves:
"The top graticule is labeled REF, and is normally 0 dB. The filter
insertion loss can be seen as the number of dB below the reference at
the center frequency."
The #759 curve shows about 9 dB of loss. The jumper high position is
for use with the Ten-Tec 216, 217 & 219 filters which have 8.0, 7.5 and
10 dB of loss, respectively.
73,
Alan N5NA
http://www.tentecwiki.org
DGB wrote:
> I just put a #759 400hz cw filter in the 9mhz board. How does one know
> which gain jumper selection to use, high or low?
>
> thanks 73 Dwight NS9I
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