Hi You should DC block the output of the 8182 if you are going to run it straight to an antenna.
The bigger issue is that WWVB changed their transmit format a couple years ago. The signal they now send is not compatible with a lot of gear out there. It turns out that the 8182 is included on that list: https://spectracom.com/support/retired-products/netclock?field_product_availability_ref_tid=94 <https://spectracom.com/support/retired-products/netclock?field_product_availability_ref_tid=94> There are gizmos you can build to convert the new transmit format to the old one, I’m not sure if you are interested in going to that extreme. Bob > On Mar 22, 2018, at 6:25 AM, D. Resor <organli...@pacbell.net> wrote: > > I've been reading and researching what I will need to connect a Spectracom > 8182 Netclock/2 for use here at home as a WWV(B) clock. > > > > I found a post response from Feb 23, 2005 by Brian Kirby which includes the > a link for a preamplifier schematic here: > > > > > <http://www.febo.com/pipermail/time-nuts/attachments/20050223/94b9bd2c/attac > hment-0008.pdf> > http://www.febo.com/pipermail/time-nuts/attachments/20050223/94b9bd2c/attach > ment-0008.pdf > > > > According to all information I have been able to gather, in California I > really don't a preamplifier. However the Spectracom 8182 manual discusses > the use of a preamplifier (8207) with their antenna as "part of the system". > > > > > My train of thought is, the 8182 superimposes 10.7vdc on the antenna BNC for > powering the inline preamplifier. If I do not use the preamplifier will > this DC voltage create problems and attenuate the RF signal? Will the > comparator circuit in the 8182 show the antenna to be open and therefore not > operate correctly? Would a decoupling network to prevent the DC voltage > from reaching the antenna create the same problem? > > > > Lastly I see in the preamplifier schematic DC power is used to power the > transistors (+9 input) and how 60Khz is 80 mV P-P amplified signal is shown > as an output signal (near Q4). I must be missing something as it doesn't > show how the RF signal coupled back to the input, unless of course C8 (the > 1.0uf capacitor) is how it is coupled back. > > > > There are several jumpers within the 8182 but the manual does not seem > discuss these. The datasheet for the 8165 disciplined oscillator discusses > on Page 5 about the "Switch A1S1" which will appears to enable/disable the > DC preamplifier voltage. > > > > https://www.atecorp.com/ATECorp/media/pdfs/data-sheets/Spectracom-8206_Manua > l.pdf > > > > Thanks > > > > Donald Resor > > N6KAW > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
