If any one is interested in looking at the repeater specs. you may go here:
http://www.advcommsys.com/krp5000.htmlIt is a crystal controlled transceiver which delivers superior audio capabilty and receiver sensitivity over solid state units. The transceiver also is thermal controlled for optimum performance. The crystals are manufactured specifically to our frq. pairs and take approx. 3-4 weeks to manufacture then sent to the repeater builder to install and align, which was some of our time delay along with our winter weather disrupting installation. The repeater also has a built in feature for battery or other back up power should the repeater lose ac power. Should ac power fail, there is no disruption of operation to the repeater as it will switch automatically to the 12 volt source connected to it.
The duplexer cavity set filters undesirable input signal to the receiver and transmitter giving us the capabilty to use one antenna. Two cavities filter the rx side and two cavities filter the tx side and are coupled to one "T" fitting that feeds the antenna.
The adjusting screws you see on top of the cavity set adjusts the rx freq. and tx freq. independantly to the input frq. of 147.840 and output frq. of 147.240. This is extremely important to tune the cavities correctly for optimum performance with all the connections in place.
You can see the Sinclair duplexer here:
http://www.sinclairtechnologies.com/catalog/product.aspx?id=1151 You'll notice in the spec sheet these are not small cavities.
I've notified TASMA that the repeater is finally on air and for all of you to enjoy.
The 220 repeater is still a work in progress and is a different configuration as we were running low on funds to duplicate the expense for 220. In this case my friend at work will design the cavities and I will build them to save cost's unless we find a used set which is highly unlikely. The controller for the 220 is purchased as well as the receiver and transmitter gear and is being assembled by my friend who is gracious enough to donate his time and test equipment to align and "tweak" our repeaters.
There is still more work to be done on the 440 repeater (Vertex 7000) as well and that is to upgrade the duplexer we are currently using. We have found that the internal duplexer is not near the quality we had hoped for. It is more likely we can find a used set for 440 as it is far more popular than 220.
T'is all I can think of for now.... enjoy the new repeater