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Author Topic: LoTW / QSL Received  (Read 590522 times)
K5PS
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Posts: 493




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« Reply #795 on: February 02, 2017, 08:08:07 AM »

Welcome to 160m.  It's a fun band.  What kind of TX and RX antennas do you have on 160m?

73,
Jonathan W6GX

Not much I'm afraid. I have a decent RX antenna, an RF-PRO-1B loop, but my vertical (33ft) is much too short. I was surprised my tuner was able to match at all. I then decided to surprise a local friend in the contest with a QSO, and when that went well...

I've been primarily focused on getting a better signal out on 80m, with some success. I may lengthen my current vertical to 43ft to get some better performance on 80 and perhaps that will help slightly on 160.
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W6GX
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Posts: 232




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« Reply #796 on: February 02, 2017, 08:37:18 AM »

Not much I'm afraid. I have a decent RX antenna, an RF-PRO-1B loop, but my vertical (33ft) is much too short. I was surprised my tuner was able to match at all. I then decided to surprise a local friend in the contest with a QSO, and when that went well...

I've been primarily focused on getting a better signal out on 80m, with some success. I may lengthen my current vertical to 43ft to get some better performance on 80 and perhaps that will help slightly on 160.

No offense but please get rid of the RF-PRO-1B loop Grin   You won't hear weak DX on the loop.  I have never owned one but my hunch is that the loop is very good if you have a severe local RFI that you need null out, but not very good if you generally are fighting against atmospheric QRN especially on 160m.  I think Bob K6UJ has one and maybe he can chime in.

You didn't say what type of vertical you have.  Since you also use the same antenna on 80m I assume you have a loading coil at the bottom.  Short verticals are OK as long as the loading coil is at the top rather than the bottom.  A lowly mounted coil means high current therefore high loss.  A highly mounted coil means low current and low loss.  The difference is significant and well documented in various publications.  The Cushcraft MA160V is a great antenna as it's top loaded.  Or if you have room for an inverted L that would be even a better antenna than the MA160V as the MA160V has a very narrow bandwidth due to its short length.

There are no commercially made and efficient top loaded duo-band 80m/160m verticals out there except the HyGain HyTower.  Prior to getting the HyTower I made a homebrewed 80m/160m vertical by using parts from a Cushcraft MA4080 and MA160.  It worked rather well since I also extended it to 55' tall.  But that antenna was lost in a windstorm just days prior to K1N.  It was too top-heavy as it had two coils and two capacity hats near the top.  While it was fun while I had it I later determined it wasn't practical for me as I live in a windy area.

You can homebrew an 80m/160m single vertical with active band switching using a high voltage vacuum relay and a very large common mode choke for the relay control line.  I have considered this option but later deemed it too complicated and outside of my homebrewing skills at the time.

73,
Jonathan W6GX
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W1VT
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Posts: 3157




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« Reply #797 on: February 02, 2017, 08:53:05 AM »

You know the RX antenna is broken when you have to work the DX by listening on the transmit antenna.  Roll Eyes
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W6GX
Member

Posts: 232




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« Reply #798 on: February 02, 2017, 09:01:26 AM »

You know the RX antenna is broken when you have to work the DX by listening on the transmit antenna.  Roll Eyes

Well, here in CO I hear just noise 99% of the time on my RX antenna (on the stuff I need anyways).  So a broken RX antenna is somewhat difficult to discern from having no antenna connected to the rig Grin

73,
Jonathan W6GX
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KB2FCV
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Posts: 2932


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« Reply #799 on: February 02, 2017, 10:30:17 AM »

Very good James.  Just remember this.  On 160m there's no substitute for size.  If everything else is equal the bigger the better Grin  I would go for a beverage antenna if you can sneak one in.  You will have to consider wildlife damage if the area is wooded and the beverage is hung low.  By the way, the worst thing to happen to a 160m DXer is to have a RX antenna break and the DXer not knowing it.  Since you can't transmit into a dedicated RX antenna,  you cannot test a RX antenna other than by doing a physical inspection or a comprehensive RX test.  As me how I know Cheesy

73,
Jonathan W6GX

Agreed, Jonathan. A beverage would be real nice. On the other side of the river behind my house are many acres of untouched land owned by the town next to me. It's a wooded flood plain so nothing will ever be built on it. While l'm sure I could not get permission to put anything there.. I could probably put something there and it would never be noticed because nobody goes back there. Like you said.. there is potential wildlife damage, and inspecting it isn't so easy as I have to lug a boat out there and cross the river (or go for a swim in the summer..). Also.. I have to get coax / cables across. A K9AY receive antenna I can probably squeeze in someplace in my back yard.. and is looking like the preferred option to try first. For TX.. The inverted L I would probably send the L out across the river because then at the most.. it's just a rope up in a tree on the other side of the river.

Sorry for the thread hijack  Roll Eyes
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VE3VEE
Member

Posts: 1959




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« Reply #800 on: February 02, 2017, 04:54:31 PM »

ZC4ZM - UK BASES ON CYPRUS - worked this morning on 20m CW, received via LOTW this evening.

Marvin VE3VEE
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W6GX
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Posts: 232




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« Reply #801 on: February 02, 2017, 04:59:44 PM »

ZC4ZM - UK BASES ON CYPRUS - worked this morning on 20m CW, received via LOTW this evening.

Marvin VE3VEE

Is this a new one for you?  I don't recall any ZC4 activities in recent years as the only resident ZC4 Op became a SK.  If yes then congrats.

73,
Jonathan W6GX
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W6GX
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Posts: 232




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« Reply #802 on: February 02, 2017, 05:06:34 PM »

Sorry for the thread hijack  Roll Eyes

Is this the equivalent of ragchewing within the DX window? Grin

eHam has been rather slow lately and I enjoy a good discussion on antennas Grin

Feb is a great month for the lowbands so you had better hurry and get your loops up.

73,
Jonathan W6GX
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VE3VEE
Member

Posts: 1959




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« Reply #803 on: February 02, 2017, 05:21:44 PM »

ZC4ZM - UK BASES ON CYPRUS - worked this morning on 20m CW, received via LOTW this evening.

Marvin VE3VEE

Is this a new one for you?  I don't recall any ZC4 activities in recent years as the only resident ZC4 Op became a SK.  If yes then congrats.

73,
Jonathan W6GX

Jonathan, I worked ZC4LI in 2013, shortly after I returned back to the hobby. I worked ZC4LI just on a small temporary vertical on 15m CW so today's 20m QSO was a new band for me, confirmed #307 on 20m.

Marvin VE3VEE
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W6GX
Member

Posts: 232




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« Reply #804 on: February 02, 2017, 05:48:39 PM »

Very nice Marvin.  Congrats.  I need to check which bands I need ZC4 on.

73,
Jonathan W6GX
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VE3VEE
Member

Posts: 1959




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« Reply #805 on: February 03, 2017, 04:08:56 PM »

Now ZC4A uploaded to LOTW.

Marvin VE3VEE
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N3QE
Member

Posts: 5542




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« Reply #806 on: February 07, 2017, 12:45:51 PM »

Woo-hoo! C37NL confirmed on LOTW, QSO's from back in 2013-2014, for 10M and phone counters. Looks like I will be over 2000 Challenge points confirmed in a matter of weeks.

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KB2FCV
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Posts: 2932


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« Reply #807 on: February 07, 2017, 04:12:52 PM »

Now ZC4A uploaded to LOTW.

Marvin VE3VEE

Yup, I saw that.. my 40 and 80 qso's are in!  Grin
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N5INP
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Posts: 2208




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« Reply #808 on: February 07, 2017, 06:57:03 PM »

Finally - My China QSO came in to LoTW from 2014  Cheesy

BH7PFH    2014-07-16 12:27:00    20M    JT65    14.07600    CHINA
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N5MOA
Member

Posts: 1692




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« Reply #809 on: February 07, 2017, 07:08:26 PM »

EF6T, E51DWC, 9ACW and LX7I via LOTW, for new ones on 160m.

Gets me to 102 confirmed, 87 LOTW. Gotta make a trip to the card checker soon to get credit for the other 15.
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