Not sure if you caught my post regarding the cone elements or if it makes a diffferene in any of this. But their are six cone elements. Three of them are different than the other three. By different they are a little larger in diameter almost as if they might be fiberglass rod with wire wound elements on them covered in something like heat sink tubing. Looks may be deceiving.
Diamond D220 vs 220R ?
- Thread starter bearcatrp
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Not sure if you caught my post regarding the cone elements or if it makes a diffferene in any of this. But their are six cone elements. Three of them are different than the other three. By different they are a little larger in diameter almost as if they might be fiberglass rod with wire wound elements on them covered in something like heat sink tubing. Looks may be deceiving.
Ubbe
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You see those statements about transmit frequencies with most discones and are specified only because it is the radio amateur frequencies where amateurs are allowed to transmit. You can transmit on any frequency inside a discones designed frequency range. It is the SWR that are low enough so that it will be no risk to the transmitter, just like a dummy load will have a low SWR, but the antennas performance will be poor in its upper frequency range. The D220 have measurements that corresponds with UHF and higher frequencies. Then the top whip must be the VHF antenna, the same way a standard size discone covers 100-900MHz with a top whip for the 40MHz range. Everything seems to be scaled down 3 times.
/Ubbe
Finally got my 220 after 2 days lost in never never land USPS. Hope to have it set up tonight.
DX Engineering actually slipped me the D220 R, which is what I wanted in the 1st place.
Excellent! Be sure not to over tighten the elements especially the bottom ones. The hub is not solid it's hollow. Give us an update when you have time. I'd be interested to see if you're as satisfied as I am with this antenna!
I finger tighten only. For now just using it indoors. Once I try it on air, police, etc, I’ll post back to give my thoughts. Have an old floor lamp I gutted to attach it to, close as can to the ceiling. Using a 4 foot jumper. Did get 20 feet of cable for my camping time in the summer. So far, am picking up further on P25. Am testing both R30 and Uniden 436.
So far this antenna is working great. Extended my range on my 436 and pick up allot further, allot. Checking air and can pick up airports I couldn’t before. A bit faint but still pick them up. This antenna is going to be sweet camping this summer.
Had the Diamond D220R.
Worked very well in in the 150-800 range for me.
Upgraded and sold it
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Worked very well in in the 150-800 range for me.
Upgraded and sold it
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What did you upgrade to?
Well had it connected to the 436hp and the performance was good on UHF/VHF;
sold the 436 for the SDS100 and use that for P25 systems with a Wilson Yagi 700/800 then bought a BC125AT and have a j pole tuned to 155mhz from KB9VBR from eBay both work quite well for being 40 feet and 1100 feet above sea level with minimal terrain
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Am looking at a full size discone this spring. Am surprised this little D220R is doing great from in my house. If this little one can do this good, a full size discone erected outside should be awesome. Like your setup. Have heard good things about J poles.
Would just mount that D220 outside you be surprised what it’s capable of picking up.
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It’s tempting but want the D220R for my camper. Don’t feel like taking it down to take it camping.
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