Thanks for the advice, it has had all earths cleaned to make sure it's ok, only other thing is mic but it seems to be hard wired, will have to have a closer look!
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Thanks for the advice, it has had all earths cleaned to make sure it's ok, only other thing is mic but it seems to be hard wired, will have to have a closer look!
When you say normal spot, do you mean on the flat main section, or on the hoop/tube part (pic would be good)Quote:
Originally Posted by Googla4x4
Talked to the radio repair man and he said it would be a faulty send transistor and $120 to fix so I bought a new 80 Chanel radio.
Did you have the Ariel an cable checked to make sure it doesn't happen to the new radio.
No mate the new one worked perfect on the old ariel, I bought a new Ariel anyway and works fantastic, had a chat to the young blokes mate who lives about 5 k's away.
Usually the transistors are burn't out by a dodgy aeriel over time always pays to have them checked on a swr meter to be safe rather then sorry.
To Check a rig:-
1. Visual check of the antenna, cable wiring connectors mic - anything obious.
2. VSWR check - this will confirm that the cable and antenna is ok, and that the radio is trasmitting the correct power.
3. Still a problem, the unit is pulled and put on a bench and connect to a service monitor. Power, deivation receiver sensitiity et is checked.
The most common problem is always connecotrs, cable run and antennas
(Im a radio tech)
Interesting, how do you VSWR meter a UHF ariel? As I understand it, VSWR measures strength in gain wave length gain to to particular radio set and ariel on attached to a particur location and also can be altered according to the plane set with the ariel?Quote:
Originally Posted by MK TANK
Now isn't UHF a point to point signal, not a wave signal?
So therefore a Db gain reading wouldbe needed.
And further more, with VSWR tuning a AM set you tune the SWR by trimming the correct ariel to get that elusive 1.1.. But how do you tune the uhf Ariel?
Tim
What type of coax and how long ?
The usual coax I see people use on their installs isn't rated for UHF frequencies and the attenuation on that cable means you could be losing most of the signal before it even reaches the antenna. This won't be picked up by checking the SWR, it will show up if using a power meter at the antenna.