 tube amp |
 PAL connector |
 boot and cap |
 ring groove |
 inside the flange |
 snap ring tool |
 compressing the ring |
 ring close up |
 snap ring |
| tube amp |
PAL connector |
boot and cap |
| ring groove |
inside the flange |
snap ring tool |
| compressing the ring |
ring close up |
snap ring |
Removing the Changeable/repairable amplifier
from PR-420CA, MK-20/22 and PR-422CA antenna
|
Look into the
mounting flange and the white plastic cap will be seen. Grip
the rim of the cap with long nose pliers and pull. Move pliers to the
other side of the cap and pull and wiggle. The cap should break free
of its silicone rubber seal and slide towards you on the cable with the
black rubber boot attached. This will
expose the snap ring retainer.
Using a snap ring tool,
compress the snap ring and
remove it. The amplifier can then be removed by a steady
pull on the coax cable. It is connected to the inside of
the antenna simply by a push on PAL connector as shown above.
Once the amplifier has been removed, push the coax cable into the tube and the whole assembly will slide out the top of the tube. Most common problems with this antenna: 1. Water entry into the F
connections just below the
antenna...electrolysis will corrode the soft copper center
conductor of the coax.
Cure: Clean off the corrosion, dry the connectors and seal against the weather with "coax-seal" putty tape. Electrical tape will not ensure a water tight connection. 2. Separation of the coax from the internal amplifier's printed circuit board from not supporting a long cable against downloading or, from a sharp pull to the coax. |
