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Old October 11th 03, 11:46 AM
Dave Glow, AA1VX
 
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Default R7000 replacement trap

Hello...

I'm new to this newsgroup, so forgive me if this subject has been beaten to
death in the past.

I'm in need of a replacement CT-3 20/30m trap for my Cushcraft R7000
vertical as a result of a burn-out. Cushcraft says they can't help me
because my version is 1996.

Any ideas or suggestions?

Thanks & 73,

Dave AA1VX


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Old October 11th 03, 04:25 PM
Z.Z.
 
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Dave Glow, AA1VX wrote:

I'm in need of a replacement CT-3 20/30m trap for my Cushcraft R7000
vertical as a result of a burn-out. Cushcraft says they can't help me
because my version is 1996.

Any ideas or suggestions?


Even if they still sold it they'd charge more than the antenna is worth.

Take the trap apart and see how bad it is. You may be able to rewind it.
Or it could be just the connections...the rivets seem to work loose after
a while, at least they did on mine. I replaced the rivets with screws
that can be re-tightened as required. You'll have to drill the dimples
that hold the trap together but then they should slide apart pretty
easily. Make sure you label the top & bottom coils so you can put them
together correctly...:-). If the coil form is melted you may be SOL but
I'd give it a look.

Or, find a used or junked one...

I also use some of that anti-oxidation paste made for aluminum house
wiring on all the aluminum-to-aluminum joints and it seems to help. Get a
tube of it at Home Depot or Lowe's or equivalent.

The R7000 is not designed all that well, IMO. I have to fiddle with mine
a couple times/year. When it works, it works fairly well but sure can be
a PITA to keep running.

73...
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Old October 11th 03, 06:44 PM
Dave Glow, AA1VX
 
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OK, good suggestion...I'll take a look at it.

Thanks.

Dave AA1VX


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Old October 12th 03, 09:57 AM
Dennis
 
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A fair bit of the trouble with the traps from cushcraft is the termination
of the end of the coil/trap ally wire i have seen 4 different model trap
that were not secured in the termination and then started arching and
barking.
rgds
vk4sx
"Dave Glow, AA1VX" wrote in message
...
Hello...

I'm new to this newsgroup, so forgive me if this subject has been beaten

to
death in the past.

I'm in need of a replacement CT-3 20/30m trap for my Cushcraft R7000
vertical as a result of a burn-out. Cushcraft says they can't help me
because my version is 1996.

Any ideas or suggestions?

Thanks & 73,

Dave AA1VX




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Old October 12th 03, 12:40 PM
Dave Glow, AA1VX
 
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Default

Thanks for the reply.

This one certainly did some arcing....all burnt around the bottom of the
trap. I opened the trap as Z.Z. suggested. The wiring was intact, and the
nylon core had some melting around it, but I didn't see any damage to the
inner aluminum tube. I cleaned out the burnt stuff and cleaned up things.
Maybe I'll try it out again after I move and can reassemble the antenna.

I would feel much better if I could get a replacement trap, however.

Thanks again, all.

Dave AA1VX




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Old October 13th 03, 01:12 AM
Dennis
 
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Good Dave you may be lucky, doesn't take much of a Carbon track for RF to
seekout,

Rgds

"Dave Glow, AA1VX" wrote in message
...
Thanks for the reply.

This one certainly did some arcing....all burnt around the bottom of the
trap. I opened the trap as Z.Z. suggested. The wiring was intact, and the
nylon core had some melting around it, but I didn't see any damage to the
inner aluminum tube. I cleaned out the burnt stuff and cleaned up things.
Maybe I'll try it out again after I move and can reassemble the antenna.

I would feel much better if I could get a replacement trap, however.

Thanks again, all.

Dave AA1VX




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