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improving the NB anl in the 858 chassis
- Thread starter Zman
- Start date
unit_399/'JJ' is one of the 858 gurus here.
So is 'AudioShockwav', Exithirteen, couple others.
As a guess, there should be a two tuning coils to fine tune the NB. That is, if the 858 boards are anything like many other Uniden/Cobra. Receive alignment would probably help too . . .
So is 'AudioShockwav', Exithirteen, couple others.
As a guess, there should be a two tuning coils to fine tune the NB. That is, if the 858 boards are anything like many other Uniden/Cobra. Receive alignment would probably help too . . .
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I second what robb said. If you do a search you may find a few thread s out there on the 858 chassis, including some of mine and the ones I posted in.
There us a resistor in that circuit, which you can increase the value to help the nb/anl. But, you would need to be sure the circuit itself is ok. I dont remember what resistor number it is offhand.
I am on my phone so searching is a pita
There us a resistor in that circuit, which you can increase the value to help the nb/anl. But, you would need to be sure the circuit itself is ok. I dont remember what resistor number it is offhand.
I am on my phone so searching is a pita
R43. This is a 680kohm resistor on some radios. Try increasing to 1 meg, up to 2 meg, to increase the nb/anl effectiveness.
See herehttp://www.worldwidedx.com/general-...3879-858-ssb-chassis-receive-mods-needed.html
See herehttp://www.worldwidedx.com/general-...3879-858-ssb-chassis-receive-mods-needed.html