Hi all,
I wanted to run this by everyone to get a better opinion of what may be going on here.
I have a Kenwood tm-v71a running into a Diamond sx-400 then to a commet 790a. The meter is inline full time. The swr was always 1:3:1 and it read the correct power specs on vhf/uhf. Then something strange started to happen. The power readings started to fluxuate and the swr was staying the same. I was normally getting on VHF 50 high power/ 13 med/and a little over 5 on low. UHF was 48 high/13 med/and 5 on low.
What I am seeing now is...VHF 38 high/ 8 med/ and a little over 3 on low....UHF 35 high/ 8 med/ and a little over 3 on low.
This issue seemed to come and go at first and then decided to stick around.
So Investagated the power feed which is streight to the battery and is fine. I checked the coax and mount via a 50 ohm cantenna dummy load with a three foot jumper right off the antenna mount. It showed a swr of 1:2:1 which it shouldn't. So I started thinking it was the feedline and or mount and decided to check it right from the meter into the dummy load and I got an swr of 2:0:1with higher power readings on med and low on both bands which shouldn't be either. I am wondering if it could be the meter that is having this issue? I did check the dummy load and I measured it at 50.6 ohms. All of these items were new when installed and worked perfectly untill now. The coax is lmr-200 ultraflex.
At the moment I do not have another meter to cross refernece my power readings I am getting on the Diamond sx-400. I am currently working on this.
Opinions?
Thanks in advance,
73's
Eric
I wanted to run this by everyone to get a better opinion of what may be going on here.
I have a Kenwood tm-v71a running into a Diamond sx-400 then to a commet 790a. The meter is inline full time. The swr was always 1:3:1 and it read the correct power specs on vhf/uhf. Then something strange started to happen. The power readings started to fluxuate and the swr was staying the same. I was normally getting on VHF 50 high power/ 13 med/and a little over 5 on low. UHF was 48 high/13 med/and 5 on low.
What I am seeing now is...VHF 38 high/ 8 med/ and a little over 3 on low....UHF 35 high/ 8 med/ and a little over 3 on low.
This issue seemed to come and go at first and then decided to stick around.
So Investagated the power feed which is streight to the battery and is fine. I checked the coax and mount via a 50 ohm cantenna dummy load with a three foot jumper right off the antenna mount. It showed a swr of 1:2:1 which it shouldn't. So I started thinking it was the feedline and or mount and decided to check it right from the meter into the dummy load and I got an swr of 2:0:1with higher power readings on med and low on both bands which shouldn't be either. I am wondering if it could be the meter that is having this issue? I did check the dummy load and I measured it at 50.6 ohms. All of these items were new when installed and worked perfectly untill now. The coax is lmr-200 ultraflex.
At the moment I do not have another meter to cross refernece my power readings I am getting on the Diamond sx-400. I am currently working on this.
Opinions?
Thanks in advance,
73's
Eric
