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Old 8-Jan-2017, 2:33 PM   #14
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,747
Quote:
for $15 I will just replace the CB-8269 and take it from there, instead of trying to take it apart and troubleshoot it.
Did you try that?

Did you do the troubleshooting test shown in the first video to see if both sections of the antenna are working OK?
Quote:
is the CB-8269 the only balun I can use on the 7698P?
Yes, that is the way it has been designed, which is unique to that series of antennas by Winegard. Most other antennas combine the VHF and UHF sections in another way using shorting stubs.



in RCA ANT751:



The CB-8269 does two things, it combines the VHF and UHF sections so that they don't interfere with each other, and its internal balun converts the antenna to 75 ohms for the coax downlead.

You could do a custom modification as done in the second video above. Connect a balun to the VHF section and another balun to the UHF section and combine them with a UVSJ.







http://www.channelmaster.com/TV_Ante...p/cm-94444.htm

http://www.solidsignal.com/pview.asp?p=uvsj
Attached Images
File Type: jpg Stub Illustration2.jpg (110.8 KB, 2720 views)
File Type: jpg RCA ANT751stubsRev2.jpg (133.7 KB, 14450 views)
File Type: jpg balun.JPG (15.1 KB, 2466 views)
File Type: jpg UVSJ.jpg (44.9 KB, 2487 views)
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Last edited by rabbit73; 8-Jan-2017 at 3:27 PM.
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