Re: [IRCA] Oklahoma TP DX 8/29/17

[d1028gary@xxxxxxxxxxx]

<<< But let's note Richard's original question: 

Question: Is it feasible to couple a Wellbrook ALA1530LNP aerial 
with a C Crane Skywave receiver without serious modification? I'd 
like try using them together. 
There was no request for a comparison with an FSL. 

And the answer to Richard's questions remains that it will work, or at least 2 of us think so. >>> 

Chuck, I think everyone agrees that almost any external antenna will provide better MW reception on the CC Skywave than the midget stock loopstick. The question is whether such a modification is likely to provide any benefit in Richard's Oklahoma TP-DXing situation, considering his DU-DXing success with the 8" FSL. If he thinks that it will, he is more than welcome to perform the modification. 

Gary 



----- Original Message -----

From: "Chuck Hutton" <charlesh3@xxxxxxx> 
To: "Mailing list for the International Radio Club of America" <irca@xxxxxxxxxxxxxxxx> 
Sent: Wednesday, August 30, 2017 9:14:00 PM 
Subject: Re: [IRCA] Oklahoma TP DX 8/29/17 

But let's note Richard's original question: 

Question: Is it feasible to couple a Wellbrook ALA1530LNP aerial 
with a C Crane Skywave receiver without serious modification? I'd 
like try using them together. 
There was no request for a comparison with an FSL. 

And the answer to Richard's questions remains that it will work, or at least 2 of us think so. 

Chuck 


________________________________ 
From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Nick Hall-Patch <nhp@xxxxxxxx> 
Sent: Tuesday, August 29, 2017 10:31 PM 
To: Mailing list for the International Radio Club of America 
Subject: Re: [IRCA] Oklahoma TP DX 8/29/17 

A good point Gary. 

I believe that you have noted that the FSL tends to favor the lower 
MW band, where its Q is highest. Perhaps there might be a more even 
match at higher frequencies when using a brute force broadband antenna. 

It would be an interesting comparison. 

best wishes, 

Nick 

At 01:21 30-08-17, d1028gary@xxxxxxxxxxx wrote: 
>Hi Nick, 
> 
><<< Might I disagree Gary? >>> 
> 
>No disagreement, necessary, Nick! 
> 
>I think both of us agree that the ALA1530 would boost the CC 
>Skywave's MW reception beyond that of the midget stock loopstick. 
>Almost any type of external antenna will do that, as long as it is 
>designed for MW frequencies. In Richard's situation, however, he 
>already has a very effective 8" FSL antenna, which has received DU 
>audio from several different Australian stations in Oklahoma. The 
>high performance of that antenna is directly related to its razor 
>sharp, single-optimized-frequency advantage. Directly connecting a 
>small, mismatched broadband antenna in its place is unlikely to 
>accomplish anything significant. Otherwise, we would already have 
>had multiple reports of DU's being received far inland on the 
>ALA1530. In rare situations that might be possible with a $1,000+ 
>table receiver with a 50 ohm antenna input, but not with a 
>mismatched Ultralight radio. 
> 
>Gary 
> 
> 
>----- Original Message ----- 
> 
>From: "Nick Hall-Patch" <nhp@xxxxxxxx> 
>To: "Mailing list for the International Radio Club of America" 
><irca@xxxxxxxxxxxxxxxx> 
>Sent: Tuesday, August 29, 2017 5:55:26 PM 
>Subject: Re: [IRCA] Oklahoma TP DX 8/29/17 
> 
>Might I disagree Gary? 
> 
>I think what the ALA1530 could do is boost sensitivity across the 
>band for the CC Skywave. The old method of coupling a random wire 
>into a portable radio seems to work at least as well for a 50 ohm 
>output from the Wellbrook amplifer. A turn or two of wire around 
>the body of the radio could hot things up nicely when the wire is 
>connected between the center pin and ground of the ALA1530's RF 
>output connector, normally meant to couple into a receiver input connector.. 
> 
>Elegance might involve a loop of wire around the internal loop's 
>ferrite rod, with a small input connector adapted from the ALA1530's output? 
> 
>At any rate, I have neither a CC Skywave nor an ALA1530, so I 
>haven't tried it exactly. But the concept seemed to work haywired 
>with a PL-380 that was modified already with an external 7.5" ferrite 
>rod antenna being fed by a Wellbrook ALA100 amplifier hooked to a 4' 
>square copper pipe antenna . Wenatchee on 900kHz became readable 
>here on a late summer afternoon, with little sign on it before. 
> 
>Also tried the ALA-100 with the old SRF-39 Ultralight...KONA-610 
>leapt out whereas just traces before. 
> 
>Give it a try Richard. It won't be "Ultralight" anymore, but it 
>might bring up those trans-Pacifics, plus you can aim the loop in the 
>right direction or use it to null interference. 
> 
>best wishes, 
> 
>Nick 
> 
>At 19:16 29-08-17, d1028gary@xxxxxxxxxxx wrote: 
> 
> ><<< Question: Is it feasible to couple a Wellbrook ALA1530LNP aerial 
> >with a C Crane Skywave receiver without serious modification? I'd 
> >like try using them together. >>> 
> > 
> >The short answer is that this wouldn't work very well, Richard. 
> > 
> >The Wellbrook ALA1530LNP is a relatively small broadband loop 
> >designed for a 50 ohm impedance-input table receiver, while since 
> >the CC Skywave is a pocket radio designed for portability, it was 
> >never designed to be directly connected to any external antenna (50 
> >ohm input, or otherwise). Installing such a 50 ohm antenna connector 
> >on the CC Skywave would be a nightmare, and even if you do this, 
> >since the ALA1530LNP is a broadband loop designed to receive all MW 
> >frequencies simultaneously, it's highly unlikely to provide the 
> >single-optimized-frequency performance of an inductively coupled FSL 
> >antenna when used with an Ultralight radio. 
> > 
> >This is the flip side of a challenge that has been intriguing the 
> >local Perseus-SDR DXers for about 5 years now-- how to somehow 
> >combine the single-optimized-frequency performance of the FSL's with 
> >the 50-ohm input Perseus-SDR's, and still have spectrum capture 
> >capability. That challenge is equally monumental. 
> > 
> >73, Gary DeBock (in Puyallup, WA) 
> > 
> > 
> >----- Original Message ----- 
> > 
> >From: "Richard N Allen" <richarda@xxxxxxxxxxxx> 
> >To: irca@xxxxxxxxxxxxxxxx 
> >Sent: Tuesday, August 29, 2017 6:30:01 AM 
> >Subject: [IRCA] Oklahoma TP DX 8/29/17 
> > 
> >The only possible signal heard here from across the Pacific was a 
> >significant carrier from the WSW on 702 kHz, most likely from 2BL. 
> >It was first heard as a slight heterodyne against 700-XEGD at 1142 
> >UTC becoming much stronger toward sunrise at 1200. It peaked at 1201 
> >before fading somewhat at 1204, then regaining in strength 1206. The 
> >signal began fading away from 1210 but didn't disappear until around 
> >1225. In the past 2BL has been the most often heard DU carrier 
> >signal here, but only rising above the audio threshold a few times. 
> > 
> >No Asian signals were observed. Also, there wasn't the usual trace 
> >of a signal from DU on 612. 
> > 
> >Question: Is it feasible to couple a Wellbrook ALA1530LNP aerial 
> >with a C Crane Skywave receiver without serious modification? I'd 
> >like try using them together. 
> > 
> >Richard Allen, 
> >near Perry OK USA, 
> >Skywave & 8-inch FSL. 
> > 
> >Sent from my iPad 
> > 
> >-- 
> >This message has been scanned for viruses and 
> >dangerous content by MailScanner, and is 
> >believed to be clean. 
> > 
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>Nick Hall-Patch 
>Victoria, BC 
>Canada 
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