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Re: [TowerTalk] Diamond X510HDM Matching network

Subject: Re: [TowerTalk] Diamond X510HDM Matching network
From: K8RI <>
Date: Mon, 21 May 2012 19:39:45 -0400
List-post: <">>
On 5/17/2012 10:52 PM, K8RI wrote:
> Anyone ever have the matching network apart on one of these.
> The one on the North side of my shop failed recently.   I have no idea
> what happened other than when I went to use it night before last the
> local repeater which is only 6 miles NE was barely audible.  SWR was sky
> high.  Everything out tot he antenna appeared to be fine. So I swapped
> it out with the spare and SWR is now good and repeater is full scale on
> the receiver.
> I pulled the sheath off and the elements appear to be fine.
> BTW my max power from the shop is 50 watts on 2-meters, although that
> antenna is rated for more than 300.

My next question is: How the Devil do you get one apart?
At first glance it appears that two setscrews would allow the the bottom 
of the antenna to come off it two pieces, not counting the long sleeve 
that holds the mast clamps and covers the coax connector.  Unfortunately 
it looks like those remaining pieces are also epoxied on. I've managed 
to heat them quite hot with a heat gun and nothing melted.  I didn't 
want to get them any hotter for fear of damaging the fiberglass.  I've 
found bottom sections for sale that included the matching section and 
it's listed that way in the parts list.  The very bottom end has a small 
ring at the top with a set screw. This has to come off before the ring 
that holds the radials can come off.


Roger (K8RI)

> 73
> Roger (K8RI)
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