Re: [IRCA] Loops and the SRF-59
Thanks. Will keep this on file for when I'm testing the loop on the SRF. - Original Message - From: <[EMAIL PROTECTED]> To: "Mailing list for the International Radio Club of America" Sent: Monday, January 07, 2008 11:42 AM Subject: Re: [IRCA] Loops and the SRF-59 > Hi all: > > I have a couple Terk loops (essentially the same as the Radio Shack loop) > - placing the 59 inside gives the maximum gain: probably all you would > ever want in most situations. > > However, placing it at the foot of, and in line with, the loop: > > --- -- > | LOOP || 59 | > --- -- > > gives somewhat reduced gain, but narrows the bandwidth for more > selectivity :-). The optimum separation between the 59 and the loop > appears to be about 2 inches: adjacent slop goes down but the signal is > still quite high. > > THEN, rotating the 59 in this position allows for some pretty mean phased > nulls. I have found that first pointing the loop such that the pest is > nulled to the extent practical works the best: the 59 then inductively > picks up mostly DX signal from the loop, and whatever pest signal the 59 > picks up can be cancelled out by the pest signal picked up on its own > little ferrite. On the Terk, there is a "line out" jack that can be > connected to a spotter receiver, which can be used to find the best null > orientation for the loop, after which the 59 can be brought in for the > final kill. > > Note that the Terk literature indicates that the loop has a 300 ohm > output, and the supplied parallel-wire cable is designed for that. > However, I have found that the output is actually around 50 ohms, and > simply connecting a 1/8" mono coaxial cable to the "line out" jack works > the best! The output is still rather low, and I have a Palstar AA30 and > MFJ-1020C that can bring the loop output up to a decent level. > > Sometimes the phased null occurs when the 59 is sidled up along the base > of the loop: > > --- > | LOOP | > --- > -- >| 59 | > -- > or somewhere in between. I still have to rotate the 59 a bit regardless > of where is ends up at. Occasionally I rotate the 59 in azimuth as well. > > 73 - Kevin > > > > >>>>> Colin wrote: I pulled out my oak-frame 5' loop (from being moth-balled >>>>> by Wellbrook!) - rewound the wire, added the capacitor..and Wahoo! >>>>> Does >>>>> this loop ever cook with the SRF59, the Sangean DX200VX, et al.<<< >> >> Interesting idea. My two Radio Shack loops are at my Burnt River ON DX >> site, >> so I will have to wait to try using them in conjunction with my SRF-59. I >> use these loops with my two Sangean ATS 909 radios by simply >> putting the radio on a plastic book reader and placing the radio and book >> reader in the middle of the loop. I wonder what I might expect using the >> SRF-59. Though I do think the SRF-59 might perform as well or maybe even >> better on its own; perhaps the loop would act as some sort of phasing >> mechanism and enhance the SRF-59? I'd be curious if anyone tries this; >> otherwise I will wait a week or two. >> >> Saul >> >> ___ >> IRCA mailing list >> IRCA@hard-core-dx.com >> http://montreal.kotalampi.com/mailman/listinfo/irca >> >> Opinions expressed in messages on this mailing list are those of the >> original contributors and do not necessarily reflect the opinion of the >> IRCA, its editors, publishing staff, or officers >> >> For more information: http://www.ircaonline.org >> >> To Post a message: irca@hard-core-dx.com >> >> > > ___ > IRCA mailing list > IRCA@hard-core-dx.com > http://montreal.kotalampi.com/mailman/listinfo/irca > > Opinions expressed in messages on this mailing list are those of the > original contributors and do not necessarily reflect the opinion of the > IRCA, its editors, publishing staff, or officers > > For more information: http://www.ircaonline.org > > To Post a message: irca@hard-core-dx.com ___ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
Re: [IRCA] Loops and the SRF-59
If there's soemthing we all like to do, it's experiment with somethging new. Can hardly wait to get to Burnt River to try out this stuff. Will probably buy a second SRF as backup. - Original Message - From: "Mike Westfall, Lost Almost NM" <[EMAIL PROTECTED]> To: "Mailing list for the International Radio Club of America" Sent: Monday, January 07, 2008 11:00 AM Subject: Re: [IRCA] Loops and the SRF-59 > I've been using my Radio Shack loop with my SRF-M37V, and it really > makes the radio cook. > However, I find that putting the radio inside the loop is just too > much. It seems to work best when the radio is about 8 inches off to > the side of the loop. > > On Jan 7, 2008 8:04 AM, Saul Chernos <[EMAIL PROTECTED]> wrote: > I >> I use these loops with my two Sangean ATS 909 radios by simply >> putting the radio on a plastic book reader and placing the radio and book >> reader in the middle of the loop. > > -- > Mesa Mike > LA de NM > ___ > IRCA mailing list > IRCA@hard-core-dx.com > http://montreal.kotalampi.com/mailman/listinfo/irca > > Opinions expressed in messages on this mailing list are those of the > original contributors and do not necessarily reflect the opinion of the > IRCA, its editors, publishing staff, or officers > > For more information: http://www.ircaonline.org > > To Post a message: irca@hard-core-dx.com ___ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
Re: [IRCA] Loops and the SRF-59
Hi all: I have a couple Terk loops (essentially the same as the Radio Shack loop) - placing the 59 inside gives the maximum gain: probably all you would ever want in most situations. However, placing it at the foot of, and in line with, the loop: --- -- | LOOP || 59 | --- -- gives somewhat reduced gain, but narrows the bandwidth for more selectivity :-). The optimum separation between the 59 and the loop appears to be about 2 inches: adjacent slop goes down but the signal is still quite high. THEN, rotating the 59 in this position allows for some pretty mean phased nulls. I have found that first pointing the loop such that the pest is nulled to the extent practical works the best: the 59 then inductively picks up mostly DX signal from the loop, and whatever pest signal the 59 picks up can be cancelled out by the pest signal picked up on its own little ferrite. On the Terk, there is a "line out" jack that can be connected to a spotter receiver, which can be used to find the best null orientation for the loop, after which the 59 can be brought in for the final kill. Note that the Terk literature indicates that the loop has a 300 ohm output, and the supplied parallel-wire cable is designed for that. However, I have found that the output is actually around 50 ohms, and simply connecting a 1/8" mono coaxial cable to the "line out" jack works the best! The output is still rather low, and I have a Palstar AA30 and MFJ-1020C that can bring the loop output up to a decent level. Sometimes the phased null occurs when the 59 is sidled up along the base of the loop: --- | LOOP | --- -- | 59 | -- or somewhere in between. I still have to rotate the 59 a bit regardless of where is ends up at. Occasionally I rotate the 59 in azimuth as well. 73 - Kevin Colin wrote: I pulled out my oak-frame 5' loop (from being moth-balled by Wellbrook!) - rewound the wire, added the capacitor..and Wahoo! Does this loop ever cook with the SRF59, the Sangean DX200VX, et al.<<< > > Interesting idea. My two Radio Shack loops are at my Burnt River ON DX > site, > so I will have to wait to try using them in conjunction with my SRF-59. I > use these loops with my two Sangean ATS 909 radios by simply > putting the radio on a plastic book reader and placing the radio and book > reader in the middle of the loop. I wonder what I might expect using the > SRF-59. Though I do think the SRF-59 might perform as well or maybe even > better on its own; perhaps the loop would act as some sort of phasing > mechanism and enhance the SRF-59? I'd be curious if anyone tries this; > otherwise I will wait a week or two. > > Saul > > ___ > IRCA mailing list > IRCA@hard-core-dx.com > http://montreal.kotalampi.com/mailman/listinfo/irca > > Opinions expressed in messages on this mailing list are those of the > original contributors and do not necessarily reflect the opinion of the > IRCA, its editors, publishing staff, or officers > > For more information: http://www.ircaonline.org > > To Post a message: irca@hard-core-dx.com > > ___ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
Re: [IRCA] Loops and the SRF-59
I've been using my Radio Shack loop with my SRF-M37V, and it really makes the radio cook. However, I find that putting the radio inside the loop is just too much. It seems to work best when the radio is about 8 inches off to the side of the loop. On Jan 7, 2008 8:04 AM, Saul Chernos <[EMAIL PROTECTED]> wrote: I > I use these loops with my two Sangean ATS 909 radios by simply > putting the radio on a plastic book reader and placing the radio and book > reader in the middle of the loop. -- Mesa Mike LA de NM ___ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
[IRCA] Loops and the SRF-59
>>> Colin wrote: I pulled out my oak-frame 5' loop (from being moth-balled >>> by Wellbrook!) - rewound the wire, added the capacitor..and Wahoo! Does >>> this loop ever cook with the SRF59, the Sangean DX200VX, et al.<<< Interesting idea. My two Radio Shack loops are at my Burnt River ON DX site, so I will have to wait to try using them in conjunction with my SRF-59. I use these loops with my two Sangean ATS 909 radios by simply putting the radio on a plastic book reader and placing the radio and book reader in the middle of the loop. I wonder what I might expect using the SRF-59. Though I do think the SRF-59 might perform as well or maybe even better on its own; perhaps the loop would act as some sort of phasing mechanism and enhance the SRF-59? I'd be curious if anyone tries this; otherwise I will wait a week or two. Saul ___ IRCA mailing list IRCA@hard-core-dx.com http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@hard-core-dx.com
