Repairing a tri-band Co-linear 50/144/430 MHz
 

My triband co-linear has 'died'. It is a clone of the Comet GP15- the 3dBi,
6dBi, 8dBi beast about 8ft long.

I've found the fault- the capacitor that connects the inner of the coax to a
tap on the matching coil. It has failed short so I can't measure it and it
is too cooked to read the value.

Of course, I can have a play with a variable, checking with the antenna
analyser or even SWR meter, but that will take more time than I can spare at
the moment.

Anyone repaired one of these before and noted down the values of the C's in
there?


--
Brian Reay
www.g8osn.org.uk
www.amateurradiotraining.org.uk
FP#898

there are 2 caps on the dual bander, 1pf and 8pf. if that helps,

rgds, Dennis


vk4sx


"Brian Reay" wrote in message
...
My triband co-linear has 'died'. It is a clone of the Comet GP15- the
3dBi,
6dBi, 8dBi beast about 8ft long.

I've found the fault- the capacitor that connects the inner of the coax to
a
tap on the matching coil. It has failed short so I can't measure it and it
is too cooked to read the value.

Of course, I can have a play with a variable, checking with the antenna
analyser or even SWR meter, but that will take more time than I can spare
at
the moment.

Anyone repaired one of these before and noted down the values of the C's
in
there?


--
Brian Reay
www.g8osn.org.uk
www.amateurradiotraining.org.uk
FP#898

I have a detailed hand drawing of the BRAINER GST 3 AKA DIAMOND 510N
2mtr/70cm (3 x 5/8s C Load on 2mtrs, 8 x 5/8s C load on 70cm.. if you
want to have a look

rgds

"Brian Reay" wrote in message
...
My triband co-linear has 'died'. It is a clone of the Comet GP15- the
3dBi,
6dBi, 8dBi beast about 8ft long.

I've found the fault- the capacitor that connects the inner of the coax to
a
tap on the matching coil. It has failed short so I can't measure it and it
is too cooked to read the value.

Of course, I can have a play with a variable, checking with the antenna
analyser or even SWR meter, but that will take more time than I can spare
at
the moment.

Anyone repaired one of these before and noted down the values of the C's
in
there?


--
Brian Reay
www.g8osn.org.uk
www.amateurradiotraining.org.uk
FP#898

"Dilligaf" wrote in message
...
I have a detailed hand drawing of the BRAINER GST 3 AKA DIAMOND 510N
2mtr/70cm (3 x 5/8s C Load on 2mtrs, 8 x 5/8s C load on 70cm.. if
you
want to have a look


Yes please, do you have a scan of it, please.

Remove spamstopper to Email.

73

--
Brian Reay
www.g8osn.org.uk
www.amateurradiotraining.org.uk
FP#898

Brian I have sent it to your yahoo ad, it is 1.2 mb

rgds


3 files EXCELLENT job done by Ross VK4JRO

"Brian Reay" wrote in message
...
My triband co-linear has 'died'. It is a clone of the Comet GP15- the
3dBi,
6dBi, 8dBi beast about 8ft long.

I've found the fault- the capacitor that connects the inner of the coax to
a
tap on the matching coil. It has failed short so I can't measure it and it
is too cooked to read the value.

Of course, I can have a play with a variable, checking with the antenna
analyser or even SWR meter, but that will take more time than I can spare
at
the moment.

Anyone repaired one of these before and noted down the values of the C's
in
there?


--
Brian Reay
www.g8osn.org.uk
www.amateurradiotraining.org.uk
FP#898