Re: [Elecraft] Diversity receive and isolating antennas

2010-06-25 Thread Stewart
Used my LP-100A to check the isolation between my main antennas and pennant receive loops, worked out great. Stewart G3RXQ On Thu, 24 Jun 2010 11:27:52 -0700, Brett Howard wrote: This just gave me a great idea... If any of you have a LP-100A you can connect an antenna directly into the back

[Elecraft] Diversity receive and isolating antennas

2010-06-24 Thread George A. Thornton
I am planning to use my dual receive K3 for field day and we want to try out diversity receive. This particular setup will be for 20 meters only. The primary antenna will be a 20 meter monoband Yagi mounted on a 40-60 ft. tower. We were considering using a Buddipole mounted in

Re: [Elecraft] Diversity receive and isolating antennas

2010-06-24 Thread Wayne Burdick
Hi George, If you have an RF voltmeter or milliwatt meter, try terminating the proposed RX antenna in a dummy load, then measure the voltage or power when you transmit. If it's less than about 2.23 Vrms (100 mW, or +20 dBm), you'll have no trouble at all. The subreceiver (as well as the RX

Re: [Elecraft] Diversity receive and isolating antennas

2010-06-24 Thread Jim Brown
On Thu, 24 Jun 2010 10:04:28 -0700, George A. Thornton wrote: Anyone familiar with this situation able to give me some guidance? In addition to the the good comments you've received about isolation based on antenna orientation and location, consider using a simple passive attenutator on the RX

Re: [Elecraft] Diversity receive and isolating antennas

2010-06-24 Thread Brett Howard
This just gave me a great idea... If any of you have a LP-100A you can connect an antenna directly into the back of the unit (where the couplers normally connect) and the unit can then be used as a field strength meter and it will give values in dBm... Thats totally how I'm going to determine if