You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

Thanks Marconi. Much appreciated.
So I ask this, I used a 9ft coax jumper for tuning. LMR400 Times Microwave coax, PL259 on one end and an N-male connector on the other. By doing the math above even a 1/4 wave jumper would only be 7.62ft. Again, this is off from the 9ft one I used but it worked just fine. I know that the MFJ meter is fine as I used 3 different 50 ohm dummy loads to check readings at 27.400mhz. All 3 showed the same reading,
R=49
X=0
VSWR: 1.0:1.
This was my baseline for tuning and I ended up at 27.400 with
R=50
X=0
VSWR 1.0:1 at the end of the 9ft coax jumper that I used. This is pretty well in line with the dummy load. And the 60ft coax jumper showed the same readings at the radio end.
Like I said, I am far from an expert and am learning by trial and error here so what I see may be different than what others may see due my QTH. At any rate I am pretty sure of my issue and how I need to truly resolve it, but I know in order to do it correctly I will start my trouble shooting at the radio and work my way back to the antenna. Hopefully we will get to the end of the 60ft run and find the readings to be like they were when first tuned, but I have my suspicions still. Will know better when I do trouble shoot it and will keep posting about it as well. And again, to all, thanks for all the input and keep it coming please!! I am not afraid to take a scolding here so don't be afraid to speak up please. The more input the merrier. And again, thanks.
73 and God Bless.
Sean.

<blockquote data-quote="222DBFL" data-source="post: 537684" data-attributes="member: 36544">Thanks Marconi.&nbsp; Much appreciated.&nbsp; So I ask this, I used a 9ft coax jumper for tuning.&nbsp; LMR400 Times Microwave coax, PL259 on one end and an N-male connector on the other. By doing the math above even a 1/4 wave jumper would only be 7.62ft.&nbsp; Again, this is off from the 9ft one I used but it worked just fine.&nbsp; I know that the MFJ meter is fine as I used 3 different 50 ohm dummy loads to check readings at 27.400mhz. All 3 showed the same reading, R=49X=0VSWR: 1.0:1.&nbsp;This was my baseline for tuning and I ended up at 27.400 with R=50X=0VSWR 1.0:1 at the end of the 9ft coax jumper that I used.&nbsp; This is pretty well in line with the dummy load.&nbsp; And the 60ft coax jumper showed the same readings at the radio end.&nbsp; Like I said, I am far from an expert and am learning by trial and error here so what I see may be different than what others may see due my QTH.&nbsp; At any rate I am pretty sure of my issue and how I need to truly resolve it, but I know in order to do it correctly I will start my trouble shooting at the radio and work my way back to the antenna.&nbsp; Hopefully we will get to the end of the 60ft run and find the readings to be like they were when first tuned, but I have my suspicions still.&nbsp; Will know better when I do trouble shoot it and will keep posting about it as well.&nbsp; And again, to all, thanks for all the input and keep it coming please!!&nbsp; I am not afraid to take a scolding here so don&#039;t be afraid to speak up please.&nbsp; The more input the merrier.&nbsp; And again, thanks.73 and God Bless.Sean.</blockquote>

[QUOTE="222DBFL, post: 537684, member: 36544"] Thanks Marconi. Much appreciated. So I ask this, I used a 9ft coax jumper for tuning. LMR400 Times Microwave coax, PL259 on one end and an N-male connector on the other. By doing the math above even a 1/4 wave jumper would only be 7.62ft. Again, this is off from the 9ft one I used but it worked just fine. I know that the MFJ meter is fine as I used 3 different 50 ohm dummy loads to check readings at 27.400mhz. All 3 showed the same reading, R=49 X=0 VSWR: 1.0:1. This was my baseline for tuning and I ended up at 27.400 with R=50 X=0 VSWR 1.0:1 at the end of the 9ft coax jumper that I used. This is pretty well in line with the dummy load. And the 60ft coax jumper showed the same readings at the radio end. Like I said, I am far from an expert and am learning by trial and error here so what I see may be different than what others may see due my QTH. At any rate I am pretty sure of my issue and how I need to truly resolve it, but I know in order to do it correctly I will start my trouble shooting at the radio and work my way back to the antenna. Hopefully we will get to the end of the 60ft run and find the readings to be like they were when first tuned, but I have my suspicions still. Will know better when I do trouble shoot it and will keep posting about it as well. And again, to all, thanks for all the input and keep it coming please!! I am not afraid to take a scolding here so don't be afraid to speak up please. The more input the merrier. And again, thanks. 73 and God Bless. Sean. [/QUOTE]

Top Bottom