Re: Tecsun PL-360 7.5" Plug-in Loopstick-- Locking System

Gary DeBock

Hey Kevin,
I'm happy to hear that you've ordered a PL-360, maybe even because of my negative influence!
Farmerik was the first to express interest in the PL-360 plug-in loopsticks, and after testing out two designs (the 3" and 7.5" inch types), I think that these plug-in antennas will create some serious AM-DXing excitement for those hobbyists who never felt comfortable about taking their radio apart.
The current plan is to make several 3" and 7.5" plug-in loopsticks for the PL-360 as time allows, then offer them at cost (around $15 for the 3" model, and $25 for the 7.5" model) to those DXers who are interested. Free time here is rather limited, but hopefully there will be others with similar detailed construction experience (woodworking, in my case) that can make these plug-in loopsticks for themselves.
As you might have guessed, I've been too busy with other hobby projects to try out the PL-360 with a plug-in connection to the backyard monster PVC loops, although I'm sure that the inductive coupling method will work fine with those fanatical antennas-- even with the midget stock loopstick plugged in :-) When you get your PL-360, you could try plugging in a sensing-wire connection to your Crate Loop, and compare the results with the inductive coupling method, if you wished.
73, Gary         
In a message dated 4/28/2010 11:47:50 A.M. Pacific Daylight Time, satya@... writes:

Hey Gary:

Well done!  I hate to admit it, but I only just recently ordered a PL-360 from Joyce at Anon-co, so I should have one shortly.  Let me know if/when the production run starts, as I will be interested.

Just curious - have you tried jacking one of your monster backyard loops into the PL-360?  If the inductance is about right, I am wondering if it would work...


--- In ultralightdx@..., D1028Gary@... wrote:
> Hello All,

> For those interested in this experimental project, the final design 
> challenge with the PL-360 7.5" plug-in loopsticks was to provide a rubber-based 
> system to secure the relatively large antenna and frame in place, to avoid 
> rotation in the antenna jack. Hopefully the same system would provide  some
> additional shock resistance for both the 7.5" loopstick and frame, and 
> reduce stress in the plug-in jack.

> All objectives were accomplished by gluing a short section of 3/8" I.D. 
> rubber hose to the loopstick frame, carefully positioned so that the PL-360 
> whip antenna tip plugs into the rubber hose, whenever the custom loopstick 
> is plugged into the PL-360. Not only does this stop loopstick rotation,  but
> the system provides additional shock protection for both the  loopstick and
> frame, while dividing the loopstick weight between  the whip antenna and
> plug-in jack. The entire 7.5" plug-in loopstick system now  feels very secure,
> and well-protected against minor bumps and scrapes (a photo  is attached
> below, which is also posted at _
> (  ).

> The PL-360's AM-DXing personality changes dramatically with these 3" and 
> 7.5" plug-in loopsticks, which are great fun to play around with. For those 
> who have ordered new PL-360's and would like to try them, I plan to start
> some  "production runs" shortly (as time allows), and also post detailed
> instructions  for those DXers who wish to build their own. It's a very rare
> opportunity to get  a huge, self-contained AM sensitivity boost without voiding
> the warranty  :-)

> 73, Gary DeBock (in Puyallup, WA, USA)

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