[TowerTalk] Raising a mast on a tower with antennas still on it

Mike Fatchett W0MU w0mu at w0mu.com
Mon Apr 29 19:59:06 EDT 2024


You should be able to secure the mast and tie back to the tower in 3 
places holding it in place.  You must have the tower cranked up enough 
to access the rotor.  pull the plate holding the mast, remove rotor and 
rotor plate if needed.  Reverse to put in. Alternatively rent a crane or 
a man life.  You can also crank up the mast if you have the rotor out 
with a bottle jack or clamp a come along end to the mast and tie the 
other end above and crank away.

All much easier on a Rohn tower with bearing.

W0MU Mike


On 4/29/2024 3:16 PM, Jim W7RY wrote:
> Fixed the subject line....
>
>
>
> On 4/29/2024 4:15 PM, Jim W7RY wrote:
>> Is there a bearing on the top of the tower?
>> How far below the bearing is the rotor?
>> How long is the mast?
>>
>> Jim W7RY
>>
>>
>> On 4/29/2024 4:05 PM, maflukey at gmail.com wrote:
>>> You need to buy, fabricate, or borrow a mast raising fixture.
>>>
>>> 73
>>> Matt
>>> KM5VI
>>>
>>>
>>> -----Original Message-----
>>> From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of Don 
>>> Tucker
>>> Sent: Monday, April 29, 2024 12:57 PM
>>> To: towertalk at contesting.com
>>> Subject: Re: [TowerTalk] MFJ QRT on May 17, 2024
>>>
>>> Chuckle! Got on the air two months short of 70 years ago and there was
>>> always some bitchin' going on the about some issue by a part of the ham
>>> community. Today we're still bitchin', just the technical content has
>>> changed. We haven't.
>>>
>>> Now, how about telling me an easy way to lift a mast with a TH7DX 
>>> and A3WS
>>> on it up and out of a T2X rotator enough so I can yank the rotator 
>>> (broken
>>> tooth?) out. Would like to do it straight up and yes could tilt the 
>>> tower
>>> (HG-70HD) over but still leaves the rotator problem (1/2 boom length 
>>> of the
>>> TH7DX leaves the tower still way up with same problem).
>>> Want to avoid having to drop the antenna.
>>>
>>> Don W7WLL
>>>
>>> On 4/29/2024 8:42 AM, Ken WA8JXM wrote:
>>>> I can say this:  back when I started (1963) we had 300 kc/s for CW 
>>>> only on
>>>> 80m and many nights it was difficult to find an open spot to call CQ.
>>> 75m
>>>> phone had 200 kc/s and was crowded even worse.  Now CW effectively has
>>>> about 70 kHz and it's mostly empty, maybe two or three signals.  Newer
>>>> hams have no idea what ham radio used to be :-(
>>>>
>>>> However, the FT8 spot is busy.
>>>>
>>>> I'm not big on FT8, but I do appreciate it:  1) it brings activity 
>>>> to our
>>>> bands.  If we don't use it, we will lose it.   2)  it is an efficient
>>> mode,
>>>> cramming many signals into a small bandwidth and decoding signals that
>>>> we can't even hear.  Great technical job.
>>>>
>>>> Some people decry FT8 for lack of useful communication.  But at least
>>>> it communicates useful signal reports and location which is a lot more
>>>> than the typical "599 TU" DX or contest contact communicates.
>>>>
>>>> Ken WA8JXM
>>>>
>>>> _______________________________________________
>>>>
>>>>
>>>>
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>>>> http://lists.contesting.com/mailman/listinfo/towertalk
>>> _______________________________________________
>>>
>>>
>>>
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>>
>



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