Yesterday afternoon, I replaced my old HAM-M with a HAM-IV recently returned from getting serviced. The M was showing some signs of age and it has been some years since it was last overhauled. On che
My first guess was that the thrust bearing was not aligned correctly. As I read furthur, it appears you are not running a thrust bearing. First and foremost, a thrust bearing is recommended and will
I'd replace the pointy-top section with a flat-top one and use a 2" thrust bearing. And also a 2" mast. Since you're in for thunderstorms and high winds, work done in such conditions will be perfect,
I think that this will occur anytime the mast is either smaller or larger than the magic diameter. I'm not sure it's necessary to replace the pointy-top. There are a couple of different models of poi
It sounds like you have to shim your rotor. You should measure your mast diameter and install the appropriate shim. I'm not sure why Hy-Gain rotors are designed for a 2.062" mast. I would not change
Also remember to tighten the mast clamp first, the rotator to plate bolts next & the plate to tower clamps last. Less chance of getting things knocked back out of alignment. Jim Rhodes K0XU jim@rhode
Yup. Did that in the order indicated, Jim. However, the plate-to-tower clamps/nuts were so rusted, I left them alone. Of course, yesterday, while rooting around for something else, I found a mailer
Actually, Rohn manufactures 5 different types of "pointy top" sections plus the "flat top" section. See the Rohn catalog for details, including the PIPE Diameter at the Top which range from 2.0 to 2.
Actually, Rohn manufactures 5 different types of "pointy top" sections plus the "flat top" section. See the Rohn catalog for details, including the PIPE Diameter at the Top which range from 2.0 to 2.
Hi Tom, I didn't look, but presume you're right, as I've heard of people using large masts with R25 "pointy top" sections. I just never saw one myself that would let a 2.00" OD mast rotate -- the one
[Steve Katz] Hi Blake, well, as I said, I never saw one that would let a 2" mast rotate, either, and I've used a lot of R25's over the years. But then, I don't have a recent Rohn catalog! -WB2WIK/6
Here is the straight skinny on 25G top sections: Several years ago (ten or more) Rohn redesigned the 25AG2 and 25AG3 top sections to use a 2.25 inch o.d. 14 gauge wall top support tube. After galvani
Well, I have one, bought new 7 years ago, that currently has a 2" Rohn mast turning inside it. There's at least 1/16 slop. 73, Pete N4ZR Sometimes a tower is just a tower
TT: To avoid (or minimize the likelihood of) binding with a thrust bearing, you might want to look at a self-centering flange mount bearing assembly instead. Last year I purchased one of these monste
Hi, Stan. Understand. I just got off the tower an hour ago after putting in two shims. It's still binding and grinding to a stop just north of east coming from south -- interestingly enough, the rota
The 25AG3 is my preferred pointy top that allows you to use a 2" OD mast. It looks stronger to me than the 25AG2 which is the other Rohn pointy top that allows a 2" OD mast. Stan w7ni@easystreet.com
I just got off the tower after adding two more 3/64" shims to the existing 2 shims to pad the 1.875" mast to look like 2.0625 to the rotator clamp. The rotator now rotates smoothly both ways south-to
one thing which I don't think has been mentioned is that mebbe you got a poorly produced section or rotor plate - on the secdtion might be the top is not "on center" - if your mast pipe stays close t