Friday, September 30, 2016

Hallicrafters 5R10A and MFJ-1022 and Utilizing Amplification

Continuing from my previous post Hallicrafters 5R10A and MFJ-1022 ...

I did a bit of experimenting with my old Hallicrafters 5R10A shortwave receiver and my MFJ-1022 amplified indoor antenna. I compared using a battery versus AC adapter. I discovered if I use the AC adapter, I should disconnect the ground bar between the Hallicrafters' ground and antenna 2 terminals then connect the antenna ground from the MFJ-1022 to the actual ground terminal and the antenna wire to the antenna 1 terminal.

Alternately, if I use the battery, I need to disconnect the ground between the MFJ-1022 and my Hallicrafters' receiver and reconnect the ground bar between the ground and antenna 2 terminals while leaving the actual antenna lead connected to antenna 1, obviously.

Basically when utilizing the amplified antenna, there are certain stations that it helps and others it simply overloads with noise if the station is in close proximity. Also with any amplified antenna, you will pick up any RF interference such as a computer if close. But, the benefits sometimes outweigh the cost.

Happy DXing.

Friday, September 16, 2016

Hallicrafters 5R10A and MFJ-1022

Here is my Hallicrafters 5R10A connected to an MFJ-1022 active antenna. The antenna seems to work ok with the Hallicrafters so long as you do not turn on the amplification of the antenna. Once you turn on the amplification, it seems to overload the radio. I am concluding its due to the sensitivity of the radio.

I leave the ground portion disconnected. The signal sensitivity decreases if the ground is connected although I am using the antenna in passive mode. Being in the South Central US, I have received signals from Mexico and Canada. However, nothing beats a long-wire antenna.