Dirland SS-3900 black - Cobra 148 GTL 120-Channels Base CB Radio

the 3500/3900 same location https://www.youtube.com/watch?v=5OPGAoinUkw&t=62s

ENGINE ON AND RUNNING 59 LBS
ENGINE OFF KEY ON 52 LBS
MAX PRESSURE DROP ENGINE OFF KEY OFF 1.5 LBS

COULD BE ANYTHING BUT IT DID NOT COME STOCK ON THE RADIO I SUGGEST FINDING YOU A GOOD CB SHOP TO TRACK DOWN WHAT THESE CONTROLS ARE FOR !!

The 1969 is probably bad. Replace it.

K40 Speech Processor or Dynamic?

email me i can send you one.

1) Shield 2) White 3) Brown 4) Green

1) Shield/ Ground
2) Audio
3) Transmit
4) Receive

all is done on the PLL encoding...

find the auido horseshoe turn it down

D is your basic 40 channel, this is what most truckers talk on, then C is low, b is double low and a triple low then e is high and f is double high, this radio also has upper and lower side band, most ham operators use these channels. Hope its been convered to talk on CB band.