Try this with your preamp if you want to amplify VHF
and UHF, using the combiner that came with the C5:
Code:
DB8E >
\
combiner > FM trap > preamp > coax > power inserter > tuner
/
C5 >
If the preamp is still overloading even with the FM trap, insert an attenuator between the FM trap and the input of the preamp:
Code:
DB8E >
\
combiner > FM trap > attenuator > preamp > coax > power inserter > tuner
/
C5 >
The idea is to find the value of attenuation that will provide enough gain for the weak signals without overloading the preamp with the strong signals. For this test the control on the inside power unit should be set for max gain, because you want the attenuation to be
before the preamp.
You can use a combination of an adjustable attenuator and fixed attenuators for the test, then replace with a fixed attenuator/attenuators.
variable attenuator:
https://www.antennasdirect.com/store...ttenuator.html
fixed attenuators:
http://www.3starinc.com/drop_in-line_attenuator.html
http://home-automation.smarthome.com...=&w=attenuator
http://mjsales.net/collections/atten...ant=1083705673
Attenuation values 1, 3, 6, 8, 10, 12, 16, 20dB (FAM)
click on 1 dB for other values; the up and down arrows are faint