At 12:06 PM 6/11/2005, Eric Lemmon wrote:
>Ray,
>
>I've seen the same symptoms occur when an inexpensive multi-band ham
>antenna is
>used, especially when the antenna is fairly close to the repeater and
>single-shielded coax feedline connects the duplexer to the antenna.
>
>Try using a good, broadband antenna that is known to perform well in duplex
>operation, and use Heliax or RG-214/U coax as feedline. It may help
>to install
>the antenna so that it is directly above the repeater equipment, and
>as high as
>possible, to minimize RF leakage into the radio.
>
>When a Mastr II radio is converted to duplex operation, special care must be
>taken to avoid leakage between the RX and TX sections, since the Lexan
>partitions don't have very good shielding properties.
>
>73, Eric Lemmon WB6FLY
>
>Ray Retzlaff wrote:
>
> I just re-built a GE Mastr II mobile for use as a repeater on 147.030+ and
>everything went great here on the bench. When we installed the machine at its
>new home at a residence on a hilltop we immediately started having
>problems with
>noise on the input freq. It only appears when the repeater is in TX and it
>appears right on the input 147.630. I have ruled out desense because you can
>hear the noise on a HT (on 147.630) but only when the repeater is
>transmitting.
>I think this might be a mix of some sort but I have no clue what to look for.
>can anyone help point me in the right direction?
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
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