Roll-up J-pole Test

I recently purchased an Ed Fong Roll-up J-pole. I wanted something to give me more gain than my rubber duck while on the roof deck. This antenna has already exceeded my expectations. I love it.

I found the antenna easy to assemble, and would consider it very blind friendly. It has a length of twin lead wire, which hangs vertically from a little loop. Another loop of wire fits between the two leads and also hangs down. The top end of the twin lead has a zip tie for suspending the wire vertically. Thebottom end of the twin lead has a BNC connector with included adapters for SMA and reverse SMA. Some time ago I saw a random video about working satellites from a former Ham Radio Outlet employee. He said that most HT failures come from a worn out SMA jack, and recommended switching to BNC connectors. Given that Kenwood has discontinued the TH-D74a I want to do everything I can to prolong its life, so made the switch immediately.

I went up to the roof deck for the first test. I had no idea how I would hang it. Nothing would give me quite enough height and keep me close enough to the antenna. I decided to try holding it up with my fingers and checked in to the Drive Time net. It worked, but I got a small RF bite on my thumb when it touched the wire.

I realized that I needed a small mast. I remembered the mast and the table clamp that came with my Buddistick. I ran down and grabbed it. The mast fit on the clamp, and the zip tie on the end of the J-pole fit into the hole on the top of the pole. It gave me just enough height, and I could throw it in my backpack. Perfect!

I put out a call on the Phil-mont repeater. As it happened someone else also needed a radio check. He sounded fine, and he said I sounded loud and clear on 5 Watts. In my apartment I need to run 10 Watts into a Diamond X50A. I wanted to see how low I could go. I went down to medium power, around 2.5 Watts. Still fine. I went down to low power, 1 Watt. To my surprise, I still sounded fine. Even more surprising, I made the repeater with a lot of static at extra low power, 100 mW. Amazing! The Ed Fong Roll-up J-pole had exceeded my expectations.

On Friday, May 20, I put it to the ultimate test. Philadelphia County ARES took part in the Eastern Pennsylvania Simulated Emergency Test. A powerful nor’easter has struck the area, rending power and communication useless. Hams have sprung into action, delivering messages between Red Cross shelters and the authorities.

Luckily this didn’t really happen, but we had a tremendous storm on Friday afternoon, which gave the exercise a taste of realism. We had test messages to deliver, but I couldn’t read the images. We used the standard ARC-213 form. I sent our emergency coordinator Cliff, KC3PGT, a note, and he transcribed the test message for me. I believe that emergency service should have accessibility as part of its design. After all, a powerful nor’easter won’t wait for a sighted person to come on air. Thanks Cliff!

That night I packed up my gear and returned to the roof deck. This familiar location would still offer the same challenges as going to a remote location. I had the test message in an email on my phone. I held it up to my ear and repeated what I heard into the radio.

THE SEPA RED CROSS SHELTER IS OPEN AND OPERATING IN PHILADELPHIA COUNTY. THERE ARE SIXTY-EIGHT RESIDENTS. SHELTER REQUIRES FIVE HUNDRED MEALS FOR NEXT FORTY EIGHT HOURS. RADIO OPERATOR IS your name, your call.

Everything performed flawlessly! The roll-up j-poll passed the test. I knew it would.