Winegrad Antenna preamp AP4800 missing component?

[ivtec]

Hi guys i was given an Antenna PreAmp Winegard Ap4800 and it doesn't work, i opened it up and discovered a missing component on circuit antenna input input side it's either a resistor or a cap not sure can you experts guess what it is and what resistance or capacitance should i try?here 2 pic attach.

[kaboom]

Re: Winegrad Antenna preamp AP4800 missing component?

I'd say a cap.

While you can solder a thruhole part across the pads (after cleaning them), that board is pretty grungy. You may even have to wash it to better inspect the traces. Check for open traces and printed inductors. These units were easily damaged by induced/capacitive coupling to lightning too.

For the test cap, something from 10-100n should be plenty.

[ivtec]

Re: Winegrad Antenna preamp AP4800 missing component?

I'd say a cap.

While you can solder a thruhole part across the pads (after cleaning them), that board is pretty grungy. You may even have to wash it to better inspect the traces. Check for open traces and printed inductors. These units were easily damaged by induced/capacitive coupling to lightning too.

For the test cap, something from 10-100n should be plenty.

Thanks Kaboom,i have many boards in my scrap ,does it have to be a Cap from RF board? Apreciate .

[ivtec]

Re: Winegrad Antenna preamp AP4800 missing component?

Hi guys ;today i set my hands on the Win-grad pre-amp fault and i was able to fix it,i had in my scrap a Cable box board and i went inside the tuner and looked for a 10-to 100n and found a 100n cap and put in place and voila i have a working Antenna Amp,appreciate the help given by Kaoom.

[kaboom]

Re: Winegrad Antenna preamp AP4800 missing component?

Hi guys ;today i set my hands on the Win-grad pre-amp fault and i was able to fix it,i had in my scrap a Cable box board and i went inside the tuner and looked for a 10-to 100n and found a 100n cap and put in place and voila i have a working Antenna Amp,

Nice to hear it worked out for ya.

appreciate the help given by Kaoom.

You're welcome.