[TowerTalk] TowerTalk Digest, Vol 136, Issue 10
W9JCC at wi.rr.com
Fri Apr 4 12:26:01 EDT 2014
The only type of hand winch I would trust is one like a Fulton 1500 or
2500 that has a self actuating brake, and is in good working condition.
A winch with a re moveable handle which is part of the self actuating
brake, or one that can free wheel, being held by muscle power, can be
very dangerous for tower work.
On 4/4/2014 11:00 AM, towertalk-request at contesting.com wrote:
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> Today's Topics:
> 1. Re: TIC Potentiometer (Scott Bullock)
> 2. Re: Fulton 2500 winch single or dual speed? (Patrick Greenlee)
> 3. Elementary feedline loss question (Pete Smith N4ZR)
> 4. Re: TIC Potentiometer (john at kk9a.com)
> 5. Re: TIC Potentiometer (Steve London)
> 6. Fwd: Elementary feedline loss question (Hans Hammarquist)
> 7. Re: Icom Filters FL-52A and FL-96 (K7LXC at aol.com)
> 8. Re: Elementary feedline loss question (David Robbins)
> Message: 1
> Date: Fri, 4 Apr 2014 09:34:26 -0400
> From: Scott Bullock <scottb at radios-online.com>
> To: David Robbins <k1ttt at arrl.net>
> Cc: "<towertalk at contesting.com>" <towertalk at contesting.com>
> Subject: Re: [TowerTalk] TIC Potentiometer
> Message-ID: <AF12D689-D485-43B9-95C2-4C80EAE68470 at radios-online.com>
> Content-Type: text/plain; charset=us-ascii
> Like I said some don't have the problems like we have :) Saltwater environment...maybe this is why I dunno. Some people have never has issues on any of these rotors ever. I seem to be on a first name basis with mr Murphy :) Hi Dave
>> On Apr 4, 2014, at 9:26 AM, "David Robbins" <k1ttt at arrl.net> wrote:
>> I have 5 of them up in the air, some getting pretty old, and haven't
>> replaced a pot in at least 10 years, so far back I can't remember the last
>> one I did... in fact I just went and found the bag of spare parts for TIC
>> stuff... I bought 3 clarostat pots in 2003 and still have 2 of them.
>> David Robbins K1TTT
>> e-mail: mailto:k1ttt at arrl.net
>> web: http://wiki.k1ttt.net
>> AR-Cluster node: 145.69MHz or telnet://k1ttt.net
>> -----Original Message-----
>> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of Scott
>> Sent: Friday, April 04, 2014 13:18
>> To: Patrick Greenlee
>> Cc: towertalk at contesting.com
>> Subject: Re: [TowerTalk] TIC Potentiometer
>> Yea it's a shame a multi thousand dollar piece of equipment is rendered
>> useless by just a drop of water. Some people have never had a problem like
>> this. Some like us up here have helped keep vishay in business lol. Seems to
>> happen less in dry environments like out west etc.
>> I've spent thousands of hours thinking abt these problems. It's crazy.
>> Always a stupid little thing that causes them to fail.
>> Had thought abt putting silicone on the shaft also and may work, in my case
>> I never thought there would be enough heat inside the Bellhousing to dry
>> that washer out. Was happy to see we got a few seasons out of that mod. Have
>> seen pots go bad on brand new rotors less than 2 weeks old. Any of these
>> that has the shaft pointing up this is more susceptible to happen to. No
>> drain for water to get out...
> Message: 2
> Date: Fri, 04 Apr 2014 08:49:22 -0500
> From: Patrick Greenlee <patrick_g at windstream.net>
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] Fulton 2500 winch single or dual speed?
> Message-ID: <533EB862.7010307 at windstream.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> You were lucky to only have to go to a clinic to get skin flap
> reattached. A free wheeling multi-speed winch (coffee grinder - jib
> sheet on racing boat) malfunctioned and went free wheeling killing the
> crewman manning it with the equivalent of a terrific upper cut punch. I
> subsequently sailed aboard that boat and for safety the winch was locked
> into one gear. I assure you I always kept my head over the winch out of
> the swinging arc of the handles on either side.
> It is best to not employ manual winches that free wheel as they are an
> accident waiting for a chance to happen. When injury or death are
> potential consequences, a few $ more for safety should be a no brainer.
> Patrick NJ5G
> On 4/3/2014 10:57 PM, Roger (K8RI) on TT wrote:
>> On 4/3/2014 12:06 PM, jcjacobsen at q.com wrote:
>>> How do,
>>> Gerald is looking for a new winch for his tower.
>>> Please, be careful that you don't get a winch that has a FREE WHEEL
>> Been there, done that, and had to go to the emergency room to get the
>> hide put back on the back of my hand. It was just a glancing blow
>> that peeled the skin off nearly half the back of my hand from knuckles
>> almost to the wrist bone.
>>> Nothing worse than the winch getting in that mode and having the
>>> handle whipping around at a rapid pace,
>> I'd say getting hit by it rates right up there.
>>> not to mention the tower dropping at the same or greater rate. Most
>>> marine/boat winches are free wheeling.
>> Mine has a latch, but I was lowering a mast that wasn't terribly heavy
>> and had it unhooked. My hand slipped off the handle, but the handle
>> stopped pointing straight up. I knew better, but it was stationary.
>> Just as I grabbed, it went around once so fast I couldn't see it
>> move! Had it hit square it would have broken a bunch of those small
>> bones. As it is I only have a scar that covers about a third of the
>> back of my left hand.
>> Those winches can be dangerous and it only takes a moment of
>> inattention to put you in a lot of pain.
>> Roger (K8RI)
>>> K9WN Jake
>>> TowerTalk mailing list
>>> TowerTalk at contesting.com
>> TowerTalk mailing list
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> Message: 3
> Date: Fri, 04 Apr 2014 09:53:55 -0400
> From: Pete Smith N4ZR <n4zr at contesting.com>
> To: TOWERTALK at contesting.com
> Subject: [TowerTalk] Elementary feedline loss question
> Message-ID: <533EB973.70707 at contesting.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> If I terminate a long 50-ohm coaxial cable with a 50-ohm dummy load, and
> put an MFJ-259B on the other end, and it reads R=56, X=0 at a given
> frequency, what is the mathematical relationship between the measured R
> (leaving calibration out of it, for now) and the loss in dB?
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