^^^When combining identical antennas pointed in the same direction with identical feed lines, you avoid the reflections inside the combiner since the signals at both inputs are identical. Be careful that the feed lines are the same length and the baluns are connected with the same polarity (if opposite, the two antennas will cancel each other out). Since most baluns don't mark their polarity, it is typically a trial and error process.

Thanks Roger1818 for your suggestion on using a dipole antenna and having it feed into the VHF input on the CM7777, and then leaving my other antennas on the UHF input. Using the dipole, increased the signal strength and also helped me pull in a few channels I did not get before (plesently suprised).

As it stands,
VHF input <- Dipole

UHF input <- Splitter #1 Input 1 - SBGH pointed to Buffalo
..................................Input 2 <- Splitter #2 Input 1 - 4Bay DIY Clone pointed to Toronto
............................................................ ...Input 2 - SBGH pointed towards Woodstock/Paris

Yes, I know I am taking a signal hit with the splitters, but I've been monitoring my signal levels and all is good. The Buffalo stations are spotty but I plan on moding my SBGH to a DBGH.

My results are posted in the Kitchener, Waterloo, Guelph, Cambridge, Bruce Pennisula thread.

Hi Guys
Was hoping some one could tell me how far apart two of these Winegard HD-9032 UHF antennas need to be placed
apart side by side ?? I am going to use the Winegard SD-3700 300 Ohm Tv Antenna Coupler with the twin lead 300 ohm impedance,
Heavy Duty, AWG 18 gauge stranded copper wire I do know the twin lead wire has to be equal length. Would like to know how
far apart do these antennas need to be when setting side by side ?? & Thanks In adavance for your post replys :D

apart side by side ??
At what channel ? (or low uhf, middle uhf or high uhf ?)
Ive got tripelo's HD-9032 nec file from here :
http://www.digitalhome.ca/forum/showthread.php?t=137678&highlight=HD-9032&page=3
so I could play around with it.

An email to Winegard should get you their recommendation. From what I hear, they're pretty good about that.


I am going to use the Winegard SD-3700 300 Ohm Tv Antenna Coupler with the twin lead 300 ohm impedance,

I have one of those too, but haven't tried it out yet. Another member on this forum pointed out in his testing with a meter that its pretty high loss for uhf, but very low loss for vhf-low. Vhf-hi loss was about 1 db IIRC.
You may be better off with a two balun, coax and splitter in reverse set up. (coax leads to the splitter would also be equal length) If you have already bought the SD-3700, then its certainly worth a shot to try it.

Thanks 300 ohm
I already have the SD-3700 coupler & I got the Winegard HD-9032 UHF antennas for free brand new still in the boxes the guy I got them from was going to throw them away & said to me if you want them take them. The instructions of the winegard SD-3700 Coupler shows you can put them side by side but do not show the measurements on how far apart. I will take your advice & email Winegard & see if they will give me the measurements. Thanks
& I will post what winegard has to say about mounting these two HD-9032 uhf antennas side by side.:D

The best spacing side by side is twice the length of the longest element.

i.e. If the longest element is 13", then the spacing is 26 inches. And it's spacing between the elements, not the booms.

And go with two baluns and a splitter. You may have to reverse one of the baluns on the 300 ohm side for proper phasing if you get a bad reception.
.

I talk with technical service at Winegard today about using two of the Winegard HD-9032 UHF antennas side by side Horizontally they said to space
them no less then 5 foot apart & no less then 2 foot up from the horizontal cross pipe if you are using mask metal pipe. Going to at least try it both antennas will be pointing same direction.

I did email them & I also called them the technical service was busy I left them a message with my phone number they called me back with in 45 min.

they called me back with in 45 min.
Yeah, they seem to be very good about that.


I ran the model stacked horizontally, without taking the booms into consideration, spaced 1.9 inches apart measured reflector tip to reflector tip and it looked pretty good with a peak at about 665 MHz of 18.1 dbi. No real horizontal lobes more than 2 dbi and vertical lobes of about 6 dbi appear after about 600 mhz. Both vertical and horizontal lobes at about 35 degrees from dead ahead.

Wider spacing should provide better gain for the lower channels, and it sounds like Winegard wants to avoid interaction with the horizontal boom.

Any reason you want to stack horizontally instead of vertically ? (big vhf antenna in the way ?)
---------------------------------------------------------------------
I ran the model with 60 inches stacked horizontally again tip to tip, again without taking the booms into consideration (like using plastic booms), and while the gain increases to 20 dbi with about the same 2.1 SWR as the single HD-9032, you may not like the dead ahead horizontal beamwidth on it. (vertical beamwidth width looks OK with just some minor 6 db lobes).
Its hard to explain, so I made a screen video. Download this wmv file to see what Im talking about. Look at the lobes and the main dead ahead beam. Very very narrow.

http://www.wuala.com/300ohm/Videos/hd9032HorizStack60inchSpacing.wmv/

The range goes from 470Mhz (ch14) to 698Mhz(ch51) in 6Mhz(1 channel) steps.

Of course, figuring out the optimum stacking distance will take a lot of time, but the 1.9 inch spacing distance gives a much much wider beamwidth on the main dead ahead lobe.

Thanks Very much 300 ohm for modeling the HD-9032

Any reason you want to stack horizontally instead of vertically ?

Yes I am trying to eliminate using a rotor. I can receive the two channels
with one antenna witch is the Mxu-59 but when I split the signal strength to
do so I loose channel 29.1 29.2 HVL at night & when I move the antenna back I loose 16.1 & 16.2 witch is WNEP the WNEP channels come from their tranlator tower W36be-d here is my Tv Fool wrapper I am also trying to get WPCW RF 27 ( 19.1 ) http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3dd5bcd76fe81761

(big vhf antenna in the way ?)

I do have a big VHF antenna but I do not have it up at this time.

I did receive a reply email from The Tech. Service Manager here is his reply.

Dear Malvin,



Space the two antennas 1.0” apart between the elements of the corner reflectors.



Give me a call if you wish and we can discuss your situation.





Cordially,



Hans Rabong

Tech. Service Manager.

Winegard Company

3000 Kirkwood St.

Burlington, IA 52601

1-800-288-8094 ext 675

Fax 1-319-754-0787

hrabo@winegard.com

www.winegard.com

Thanks Guys for your replies.
Malvin :D

^^^stacking horizontally will drastically reduce your horizontal beamwidth and thus may make things worse if the broadcasts are in different directions. Stacking vertically will keep the horizontal beamwidth close to the same, but will reduce the vertical beamwidth, which usually isn't of much concern.

Have you considered adding a low-noise, low-gain pre-amp? It might do the trick in your situation. Maybe an Antennas Direct PA19?

WPCW on rf27 is a no-hoper as per TV Fool. The distance is not super far, but there must be some obstacles in the way. If there were any hope, you would absolutely have to have the best antenna, best pre-amp, and exact aim (rotator), and as much height as possible.

I loose 16.1 & 16.2 witch is WNEP the WNEP channels come from their tranlator tower W36be-d here is my Tv Fool wrapper I am also trying to get WPCW RF 27 ( 19.1 )
I don't see a WNEP 16.1, but see a WINP 16.1.

Thats an interesting TVFool, as you have 2 WPSU-TVs on the same RF 15 and virtual 3.1. How does your tuner handle that ?


WPCW RF 27 ( 19.1) at 87 miles and 2 edges is going to be very tough. I would try various mounting heights.

WHP Wrote:

Have you considered adding a low-noise, low-gain pre-amp? It might do the trick in your situation. Maybe an Antennas Direct PA19?

I do have a Winegard AP - 8780 pre-amp I did not know about the pre-amp you listed But was going to buy the 9260A from here http://www.researchcomms.com/hdtv. But I search here at the Digital Home forum to see if any of the members here have bought one of these pre-amp from that company.

300 ohm wrote:

I don't see a WNEP 16.1, but see a WINP 16.1.

WNEP rents the tower its listed as W36BE-D RF is 36.1 then comes up on my Zenith converter box as RF 36.1 & 16.1 I have different converter boxes.

Thats an interesting TVFool, as you have 2 WPSU-TVs on the same RF 15 and virtual 3.1. How does your tuner handle that ?

Not sure how the converter boxes only put up one of them now my Digital Stream box shows both of them & my Zenith box does to but you can delete one of them now my Channel Master converter box just puts up one
of them.


WPCW RF 27 ( 19.1) at 87 miles and 2 edges is going to be very tough. I would try various mounting heights.


My antenna tower is a telescoping tower Min height is 25 foot max height I
can go is 55 foot I figured if I could just get WPCW RF 27 ( 19.1 ) channel to show up one the box with the two Winegard HD-9032 antennas I would put two of my 4251 Channel Master Parabolic antennas up & was hoping it would pull in the picture. :D

Thanks in advance Guys

Malvin

WPSU operates a 3-unit DTS/SFN.

I do have a Winegard AP - 8780 pre-amp I did not know about the pre-amp you listed But was going to buy the 9260A from here http://www.researchcomms.com/hdtv. But I search here at the Digital Home forum to see if any of the members here have bought one of these pre-amp from that company.

I believe mlord bought a preamp from that company, which model I don't know but it was .4 NF.
AFAIK, he's still pleased with it.

3oo ohm Wrote:
I believe mlord bought a preamp from that company, which model I don't know but it was .4 NF.
AFAIK, he's still pleased with it.

I did find his post: http://www.digitalhome.ca/forum/showpost.php?p=823393&postcount=426

That was four years ago wonder if that pre- amp is still working maybe if he sees this he could post & tell us if its still working ?? They are not cheap but I am thinking of getting one witch would be the 9260A.

Thanks for the replies guys :D

Malvin

Can I combine a VHF-Hi yagi (used for only a single weak VHF-Hi channel) to a UHF antenna (used for moderate UHF channels and 2 strong VHF-Hi channels), pointed in the same direction....using only a standard splitter in reverse ?

It will work of course, but the main question is how much more of a loss you'll incur over using a UVSJ.

the problem is using the UVSJ MIGHT hurt the VHF-Hi on the UHF antenna, and running another cable with switch is complicated cause of multiple TVs

of course the yagi might receive some of the same UHF channels and muck up the UHF antenna....

Maybe the addition of one of these babies to the UVSJ would help.
http://www.alibaba.com/product-free/111965987/Compact_TV_antenna_amplifier_10_UHF.html