P.S. I just took a stroll into the garage. This is the culprit to avoid: https://triflowlubricants.com/product/synthetic-grease Tri-Flow TF23004 Paul, W9AC --Original Message-- From: TowerTalk <tower
My $0.02. I own the USB version of the N2PK VNA and as Jeff points out, the myVNA GUI from G8KBB is very intuitive. I have tried the VNWA GUI with the N2PK but found that setup is more complicated a
You want to ensure the that the choke's self-resonant-frequency isnt within 80m. I am using J.W. Miller 5252 chokes at the vertical base feed. Purchased from Mouser. Prior to installing the Miller ch
The inductance of J.W. Miller 5252 choke is 125 uH. https://www.mouser.com/datasheet/2/54/200_series-776798.pdf Paul, W9AC You want to ensure the that the choke's self-resonant-frequency isnt within
2) that terrain in any direction can strongly influence optimum height for antennas for each band." About 15 years ago, Bill, W4ZV, presented a case study of Frank Lucas' QTH. W3CRA was located on t
another mountain range about 15 miles east of me and by editing the terrain file to either include it or not I can see definite differences." And that brings me to this point: consider a case where
Good point, Steve. Two years ago, N4CC and I were 48 hours away from "crane day" when we tested the fit of a 3-inch galvanized chromoly mast into a 3" flange bearing. The mast was approximately 1/16
frontpanelexpress.com - you download their design tool, which lets you design a "front panel" = a piece of aluminum sheet metal with holes and cutouts in it. They have every imaginable shape and siz
"The primary reason for using F-connectors is that the CATV cables require crimp connectors, and F-connectors have dominated CATV/MATV because they are fairly inexpensive and very easy to install wit
It doesnt take much of a nick either to later find a build-up of rust particles when opening up an unsealed F connector. For the last two years, I've been purchasing 1,000 ft rolls of Belden 1829BC
with PL-259s (and reducers) on both ends. It looks like RG-400, about the same diameter and with the clear jacket, but is much more flexible, and the braid is not silver-plated. Anyone know what thi
Pete, When faced with the problem of getting enough turns through a core, I often use RG303 (equiv. Belden #84303). It's O.D. is 0.17-inch and its materials composition is in the same class as RG142.
reason that you can't plug two of the holes with the appropriate size wire and two holes with the ground connections and fire it off?" I done it many times. As you suggest, pass the same gauge condu
As bad as the SWR plots look after the repairs, it's not that far out of spec. The USAP LP-1005 SWR spec is less than 3:1 between 3-4 MHz, and less than 2:1 between 4-30 Mhz. On 75m-80m, it really ne
If you ONLY need to measure impedance, then you do not need to set the analyzer to a specific port Z. That's for OSL calibration, directly measuring SWR, and some other line optimization tools. If yo
Wes, "As has been suggested elsewhere in this thread, you might be tempted to try connecting the balanced line to the unbalanced test port of the analyzer, in the belief that since it is a "floating"
Sorry for the mixed terms. By CIA, I mean a one-port (S11) Complex Impedance Analyzer -- also known as a Vector Impedance Analyzer. So, if you own a 55 Zoom, you have a CIA. For others curious, the
And...easy maintenance when needed. Consider a 25+ multiconductor cable with lugs screwed down on blocks like a Cinch barrier strip. To remove the equipment for bench testing requires a lot lug remo
Although not a performance issue, the clear Nylon coating of THHN does not hold up well to UV. I typically see it splitting after 1-2 years of being exposed to the sun. Paul, W9AC Of course you do no
I use "LadderSnaps" to create a thick radiator. Although LadderSnaps are used to make 600-ohm open line feeders, they work well for this purpose. Simply tie the two conductors together at the top an