The key way at the shaft-mast clamp platform or the key way at the shaft-large
both have enlarged. Your can:
1. Replace the shaft and large gear.
2. Have the mast clamp platform key way milled to take a larger key. It will
eventually fail again.
3. Have the shaft and large gear brazed together.
4. Some of the above and add a 'torque system' to soften the back and forth
action of the antenna.
5. Use short boom antennas.
I tried a double key way on the shaft-large gear and it eventually enlarged
Fred Helmstetter wrote:
> I installed a well-used HDR-300 last summer to turn a 5 el 20m Yagi (40ft
> boom) and miscellaneous other smaller antennas on the same mast. The HDR-300
> moves the stuff around quite well but there's 10-20 degrees of "play" in
> direction when the brake is engaged. Even in fairly light winds the
> antennas always seem to be wiggling around. Not a big deal on 20m but it's
> a bit of a hassle with the 9WL 432 beam at the top of the mast... Is this
> "normal" for the HDR-300? Any way to fix/improve it?
> Fred, N9FH
Doug Renwick VA5DX
PO Box 50, Clavet, Saskatchewan, Canada S0K 0Y0
First VE5 2 x 5BDXCC and 160 M DXCC
What profit it a ham if he gains all the awards yet forfeits his soul?
I'll run the race and I will never be the same again.
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