Nigel, Actually, when I got the 8140 a few years ago, I modded it to remove the DC from the rear output. It was designed to power external modules, which I don't have and don't need.
Somewhere I have a copy of the manual, but I downloaded yours in case I can't find mine. Thanks, Joe Gray KA5ZEC On Wed, Oct 7, 2009 at 2:37 AM, <[email protected]> wrote: > > Morning Joe > > Don't forget either that the 8140 as supplied has a DC supply for the line > taps superimposed on the rear panel sinusoidal outputs. > > However, the A4 distribution amp/output PCB was also used in several other > Spectracom products, including the 8130 and 8164, with component > identification always remaining the same, as far as I can tell anyway, but > with link > placement and filter values changing to suit the application. > > If you compare, for example, the A4 schematics from the 8140 and 8164 > manuals you will see that removing the DC bias is quite straightfoward. > It would also be straightforward to set the divider output links on the > 8140 A4 as per the 8164 A4 to provide the four different sinusoidal output > frequencies to the rear panel although three of the four output filters would > also need to be modified to suit the changed frequencies. > > The good news is that all the required component values are also in the > 8164 manual:-) > > I assume you have the 8140 manual but if not it's available for download > from the Spectracom site, a simple registration is required, or I've uploaded > both for anyone that might be interested..... > > _http://rapidshare.com/files/289729072/Spectracom_8140_2v1_0594.pdf_ > (http://rapidshare.com/files/289729072/Spectracom_8140_2v1_0594.pdf) > > _http://rapidshare.com/files/289730121/Spectracom_8164_3v1_0893.pdf_ > (http://rapidshare.com/files/289730121/Spectracom_8164_3v1_0893.pdf) > > regards > > Nigel > GM8PZR > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
