[TowerTalk] US Tower 72 ft crank up grinds to a standstill

[Grant Saviers]

Concur.  Took too many tries to get an Orion 2800 into my HDX 589 
without contacting the cross bracing on the way up.  It looks symmetric 
but it is not.  Turns a DB36 & 86' dipole.

My Yaesu 2800 did fit w/o difficulty IIRC in another 589.  Turns a 4L 
steppir, at lot less mass and windload than a DB36.

Grant KZ1W

On 5/26/2020 14:46, Richard (Rick) Karlquist wrote:
> AFAIK, the M2/Orion is the only rotator that can
> fit within a UST #4 section AND also has the
> strength to turn a DB-36.  It is entirely possible
> to fool yourself and mount a rotator into a tower
> thinking it will work, only to have a problem
> of interference during rotation or extention.
> Been there, done that.
> 
> There is also a possibility that a cross brace
> is bent inward enough to catch on the rotator.
> My used HDX5106 at some time (not sure if before
> or after I bought it) suffered a bent brace, limiting
> its height to 70 feet.  I had to build a special jig
> to bend it back out using a bottle jack.
> 
> Rick N6RK
> 
> On 5/26/2020 2:31 PM, Alan Swinger wrote:
>> To be more specific . . . my former Ham IV motors (too weak for my 4 
>> EL Stepir) and my current Yaesu G-2800 both fit the TX-472 rotor 
>> mounting area w/o interference in crank-up/down. However, for example, 
>> a Hy Gain Tail Twister will not fit and allow full crankup/down of the 
>> tower. So, what rotator are you using? - Alan K9MBQ
>>
>>
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk