--- In ultralightdx@..., D1028Gary@... wrote:
>
> Hello Neil,
>
> Well, I sure wish I could tell you whether the Leukoplast tape is suitable
> as a coil winding base or not, but having never used the material, it's
> tough to say. If you have access to an LCR meter, you might try winding a
> simple Litz wire coil on the Leukoplast tape around a type 61 ferrite bar, to
> replace the stock loopstick coil in one of the single-coil Ultralight
> designs (DT-400W, E100, G8, PL-300WT, etc.) If you match the stock coil's
> inductance in your new coil and the radio has a decent sensitivity boost, the
> Leukoplast tape is probably working fine.
>
> The adhesive tape is simply a convenient base to hold the Litz wire turns
> neatly in place as you wind the coil, but using the wrong type of tape can
> really upset the loopstick performance. Gregory Mosher tried transplanting a
> 7.5" Amidon loopstick into his PL-310 model according to the instructions
> given in the PL-380 transplant article, but had a rough time initially
> because his coil base tape was of the wrong type, greatly reducing the radio's
> sensitivity. When he switched to the J & J tape, he had a huge boost in
> performance.
>
> If you can't find a suitable tape, Neil, I would be happy to ship some of
> the J & J tape to you. Having purchased a "lifetime supply," one 10 yard
> roll of the stuff could be easily spared, and should be enough for you to
> build about 100 loopsticks :-)
>
> 73, Gary
>
>
>
>
> In a message dated 1/21/2010 9:00:43 P.M. Pacific Standard Time,
> neil.findlay52@... writes:
>
>
>
>
> Gary
>
> in Australia Johson & Johnson Produuucts are no longer sold
>
> There is a Leukoplast waterproof tape sold as follows
>
> Leukoplast# Waterproof is a white tape featuring a zinc oxide adhesive,
> allowing it to adhere strongly
> and reliably even under heavy strain. It features high tensile strength
> and is suitable for patients with normal skin.
>
> On the packet it say it is a rubberised tape and it is smooth white and
> not very stretchy
>
> Would this be similar to what you are using
>
> Neil Findlay
>
>
>
>
> ____________________________________
> From: "D1028Gary@..." D1028Gary@...
> To: ultralightdx@...
> Sent: Fri, 22 January, 2010 1:35:34 PM
> Subject: Re: [ultralightdx] First time loop winder
>
> Hello _Bgelb2@..._ (mailto:Bgelb2@...) ,
>
> Thanks for your interest in the PL-380 7.5" loopstick transplant
> operation, and I'm happy to share my own experience in building two successful
> transplant models. First of all, you may wish to check if you have the most
> complete version of the article (which contains suggestions for the two
> adhesive tapes used as a base for coil winding, and as a waterproof covering for
> the coil), This version also has "Shootout" information comparing the PL-380
> stock and modified model RSSI and S/N readings on the AM band, and is
> posted at
> _http://www.mediafire.com/?hudn0mtlueg_
> (http://www.mediafire.com/?hudn0mtlueg) .
>
> Both of my PL-380 7.5" transplant models have coil turns wound tightly
> (with no spacing) using 40/44 Litz wire on a base of Johnson & Johnson 2"
> waterproof tape, adhesive side up (available in large quantities at
> _http://www.amazon. com/dp/B0015XOCO 6/ref=asc_ df_B0015XOCO6993 990?smid=
> A367RFIQRDER75&tag=shopzilla_
> mp_1030-20&linkCode=asn&creative=380341&creativeASIN= B0015XOCO6_
> (http://www.amazon.com/dp/B0015XOCO6/ref=asc_df_B0015XOCO6993990?smid=A367RFIQRDER75&tag=shopzilla_mp_1030-20&linkCode=asn&creativ
> e=380341&creativeASIN=B0015XOCO6) , and usually available in small
> quantities at Walgreen stores, or from me if you need a small amount). Both Steve
> Ratzlaff and I have always had excellent results wrapping 40/44 Litz wire
> coils tightly (with no spacing), although there is a difference of opinion
> about this, and Roy has found that he can gain slightly more sensitivity
> with spacing between Litz wire turns in his G8 transplant model. I respect his
> opinion about this, but since the PL-380 7.5" transplant article documents
> the DXing performance with a closely-wound 40/44 Litz wire coil, in the
> absence of an LCR meter you may wish to follow the article's instructions in
> order to finish up with a 554 uh coil inductance.
>
> There is no need to use a winder for the coil as long as you have a Litz
> wire reel (such as is supplied by Dave Schmarder is his shipments) and J & J
> adhesive tape as a coil base, as shown in the photo below:
>
>
>
>
> Although this photo shows the winding of an E100 Slider coil (far more
> complicated than winding a fixed coil, such as in the PL-380 project), the
> process of wrapping the coil turns is identical, and can be interrupted at any
> time because the J & J tape holds the coil turns tightly in place.
>
> I hope these suggestions will be useful to you, and if you have any other
> questions, please feel free to ask.
>
> 73 and Good DX,
> Gary DeBock (in Puyallup, WA)
>
>
>
> In a message dated 1/21/2010 6:01:08 P.M. Pacific Standard Time,
> bgelb2@... writes:
>
>
> Hello to all and thank you to Gary, Roy and all the prolific contributors
> to this group who gladly share their expertise, experience and time with
> everyone. Can anyone share any tips from their experience as far as the
> actual winding process, i.e., keeping the windings neat and evenly spaced, etc.
> I am gathering what I need to do a 7.5" transplant on a Tecsun 380 and I
> will attempt to do the winding without an l/c meter. I have questions such as
> what spacing between turns (if any) should there be and do you have a
> winder rigged up.
>
> Thanks again to all,
>
>
>
>
>
>
>
>
>
>
> ____________________________________
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