[TowerTalk] Cushcraft XM-240 Shortty-Forty questions

[Gedas]

Although my antenna is a older XM-240 not a 40-CD2

Gedas, W8BYA EN70JT

Gallery at http://w8bya.com
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On 9/12/2020 10:26 PM, Gedas wrote:
> I concur.....AND, the sheet metal screw will come loose and corrode 
> the contact between the wire and the aluminum.
>
> Gedas, W8BYA EN70JT
>
> Gallery at http://w8bya.com
> Light travels faster than sound....
> This is why some people appear bright until you hear them speak.
>
> On 9/12/2020 9:38 PM, Kim Elmore wrote:
>> I have a genuine pre-MFJ Cushcraft 40-CD2. The loading cools on it 
>> are covers in heat-shrink.
>>
>> Kim N5OP
>>
>> "People that make music together cannot be enemies, at least as long 
>> as the music lasts." -- Paul Hindemith
>>
>>> On Sep 12, 2020, at 6:19 PM, john nistico 
>>> <electric911inc at hotmail.com> wrote:
>>>
>>> I just got a steppir with 40 meter add on it I love it.
>>>
>>> Get Outlook for iOS<https://aka.ms/o0ukef>
>>> ________________________________
>>> From: TowerTalk <towertalk-bounces at contesting.com> on behalf of K9MA 
>>> <k9ma at sdellington.us>
>>> Sent: Saturday, September 12, 2020 7:08:54 PM
>>> To: towertalk at contesting.com <towertalk at contesting.com>
>>> Subject: Re: [TowerTalk] Cushcraft XM-240 Shortty-Forty questions
>>>
>>> I had an original Cushcraft A3S, which had trap coils and screws coated
>>> with the hard epoxy. The screws clearly weren't going to turn, and I
>>> never saw any evidence of poor connections, but I suppose the material
>>> could have yielded. Replacement traps I got from MFJ (after insect
>>> damage) had no coating on the traps, loose screws, wires wrapped
>>> backwards, etc. They were junk. I would not recommend buying any MFJ
>>> Cushcraft or HyGain antennas.
>>>
>>> I currently have an old Cushcraft D40, also pre-MFJ. I'm pretty sure
>>> they have shrink tubing over the coils, though there may be epoxy under
>>> that.
>>>
>>> Unless you see evidence of poor connections at the screws, I would 
>>> leave
>>> them as is. If the epoxy looks like it's suffering UV damage, it might
>>> be worth covering it with UV-resistant shrink tubing or tape. I 
>>> wouldn't
>>> think the stray capacitance would be as critical is it is in traps.
>>>
>>> My D40 has been working for over 25 years, though I did have to replace
>>> the center insulators, and the elements aren't quite straight any more.
>>>
>>> 73,
>>> Scott K9MA
>>>
>>>> On 9/12/2020 5:07 PM, RVZ via TowerTalk wrote:
>>>> Hi Guys,
>>>>
>>>> I purchased a Cushcraft XM-240 which was new in the box but was 
>>>> made about 10 years ago.  The label on the box says "Cushcraft 
>>>> XM-240", and doesn't mention MFJ, so perhaps it was made by 
>>>> Cushcraft.   My questions pertains to the 4 loading coils.  I 
>>>> believe the loading coils made by MFJ have heat shrink tubing over 
>>>> the coil, is that correct? The loading coils on this XM-240 don't 
>>>> have heat shrink tubing over them, rather the coil is covered with 
>>>> a thick shiny black epoxy which is very hard.  The epoxy has really 
>>>> sealed up the coils and self tapping screws that connect the coils 
>>>> to the aluminum tubing.  I believe the epoxy would be rather 
>>>> difficult to remove so I'm wondering if I'm likely to have reliable 
>>>> results using the traps "as-is" for a couple years, or if I should 
>>>> remove the hard epoxy from the self- tapping screws now and replace 
>>>> them with screws, nuts, and lock washers?  If I do replace the 
>>>> screws, should I cover them with more epoxy, use heat shrink 
>>>> tubing, or both?  Thanks
>>>   & 73, Dick- K9OMWisconsin
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>>>
>>> -- 
>>> Scott  K9MA
>>>
>>> k9ma at sdellington.us
>>>
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