Hi guys and gals, I have got DX Engineering 75 ohm foam coax to make the stubs/feeders for my Comtek 80 meter 4-Square and am finding some difficulty. Neither my MFJ-259B nor my Rig Experts AA-170 se
Hi Terry, see page 16 of this site https://www.rigexpert.com/files/manuals/aa170/aa-170-manual.pdf when looking for a 1/4 wave, leave the far end of the coax under test open. when looking for a 1/2 w
Hi Ed, Unfortunately I don't get any indication per the Rig Experts manual with an open. The R/X just does not get any indication from 1982Khz all the way to 10,500+ KHz. On my MFJ-259B (old one) wit
Ok Terry, well 1/2 wave at 7234kc will = 1/4 wave at 3617kc, so trim until u get near 7500kc and cut all lines that length and u should be ok. Back in the 1980s when I built my 4 square, I used a noi
Hi Terry, I replaced the 1/4 lines on my 80 meter 4 square this past fall and used my AA-170 to set the length with no problem. Just select "all" for the mode and set the freq you're aiming for and t
I don't know what is wrong here but I keep getting in this situation where my typing starts running back over my writing. I will try again to reply. Joel, I have tried all that the manual says withou
As a sanity check, terminate the coax with a 50 ohm resistor and verify that you have good coax. Flat line at 1:1 SWR, etc. Rick N6RK Joel, I have tried all that the manual says without success. All
Since he said the coax was 75-ohm, a 75-ohm termination would be better. Rick N6RK Joel, I have tried all that the manual says without success. All I see is the horizontal solid and dashed lines of R
Good point Wes. I will see if I can find a decent value of resistor. My Rig Experts AA-170 was purchased because I did not trust the readings my MFJ-259b was giving me while working on my hytower. Pr
I used a return loss bridge and measured a TEE fitting with a good 50 ohm load on one port the length of cable on the other side. The antenna analyzer will read a perfect 50 ohm match when the cable
Hi guys and gals, Well, to make a long story short my Rig Experts AA-170 has quite working. Looks normal but a 56 ohm resistor at the end of the 75 ohm coax reads infinite. On the MFJ-259b it reads 5
Hi All, I was discussing this thread with a microwave engineer on 75 meters this morning and he reminded me that I had AM RF in my RX antennas at my previous QTH. So much that I used Hi-Pass filters
The MFJ259 is a fine box but when you get to 80m with anything near a BC it's going to be problems. In fact I discovered the hard way that even up on 20m the box can read funky if your antenna is bi
<The MFJ259 is a fine box but when you get to 80m with anything near a BC it's going to be problems.? In fact I discovered the hard way that even up on 20m the box can read funky if your antenna is b
Hi Jeff, Same story here and that is one reason why I am so disappointed my Rig Experts AA-170 failed me. It's really a nice instrument to use in so many ways. Now I thought the explanation of doing
I did have similar issues in Keizer trying to dip anything on 160 meters. The MFJ just would not work their. Had a radio station about 1/2-3/4th mile away across the Willamette River. Found out I got
anything < 1.8 mhz. Jim VE7RF IIRC, what MFJ supplied was a tunable NOTCH filter, which might work OK in situations where there is only one station that is strong enough to upset the MFJ-259B. Of co
All's well that ends well I'm happy to report. K2AV, Guy suggested I check the SO-239 on the Rig Experts AA-170 and I found an open solder joint between the back of the connector and the circuit boar
Richard, You are so right about that static issue. I even seem to remember the Rig Experts manual says to short the antenna leads together to remove any static build up before connecting the analyzer
On 6/10/2018 8:01 PM, terry burge wrote: All's well that ends well I'm happy to report. K2AV, Guy suggested I check the SO-239 on the Rig Experts AA-170 and I found an open solder joint between the b