Thread: lost station

styxfix, I think you may have hit the nail on the head here in a round-about sort of way. The pre-amp being used is a UHF/VHF model, HOWEVER it has seperate inputs for UHF & VHF. SO if the OP only has his UHF antenna connected to the UHF input, then of course any VHF signals will not be passed. Should this be the case, and I would be willing to bet that it is, therein lies the problem (and solution). The VHF side of the pre-amp needs to be jumpered over to the UHF side, or better yet, add a VHF antenna such as the VHF antenna in my signature and connect to the VHF side of the pre-amp. This should recover 28.1 for the OP. Also other VHF stations (WYOU, WBPH, WPVI, WGAL) are possibilities.

Of course, this is all under the presumption that the pre-amp is a 300ohm in and 75 ohm output model. If it is the 300 ohm output model, there is only one 300 ohm input for both UHF & VHF, and we are back at square one. We need the OP to clarify the model he is using.




http://www.blondertongue.com/reception/galaxy.pdf

I think Styfix truly did hit the nail on the head. The OP is attempting to receive a VHF station with a UHF antenna. The reception seen on VHF 11 beforehand was purely incidental, and the addition of the pre-amp has likely upset the delicate balance that luckily worked at that time.

For some reason those Blonder-Tongue pre-amps look to be a bit noisier than the more commonly used Winegard & Channel master units. I also thought that a UHF only amp would just pass the VHF frequencies un-amplified (like Winegard models), but not sure if all models do.

acamus,

I took the opportunity to look up
Your Chart

And I'm sorry to tell you this, but I've definitely seen better !

Just to clarify...
The Column marked "Real", is the Channel Frequency Number, that the Antenna actually has to be able to receive.
The "(Virt)" column, are the numbers you enter into your Remote/Tuner, to select that channel.
You can blame the FCC for that, but, it's the way it's done.
An Antenna should always be selected, according to the Frequencies listed in the "Real" Column of your Chart, for your specific location.

So, given what I see in your chart, you MUST have an Antenna which at least receives Channels 7-69, but, if you have a Full Range Antenna Ch 2-69. that would work too.
Do you know what kind of Antenna you have ?
If not, maybe you could attach a picture of it, and someone may be able to identify it for you.

I think your choice to add an Pre-Amp to your system, was a good idea.
However, given that we don't know what the output(s) are for the V-III, I may have suggested the...

ChannelMaster AP-8780

I was under the impression, that the V-III Amp, had only One Input for the Antenna, but TWO Outputs (like for two TV's) and that it supported both VHF and UHF.

So to re-cap what you need to do...
1) Get us the Make/Model of your Antenna, or, a Picture of it.
2) Tell us if the wire you're using on the V-III is 300 ohm (Flat Cable) or Coaxial.
3) Look at the V-III, or the Paperwork for it, and see if there are separate inputs for VHF and UHF, or just one input, and one output.
4) Then IF there are separate inputs for VHF and UHF, which one do you have your Antenna connected to.

One other thing...
Are you sure that you're Aim is directly on the Channel. Do you have a Compass, and are sure that the Antenna is on 45° Magnetic ?

I apologize for my redundancy, the other Contributors to this issue, having said the same thing. But, I thought it may be helpful to offer a step by step approach .

Have a good Day !
S.W.

Ok guys, I've gotten the message. The preamp has duel input for 300 ohm, one of which is connected to the UHF antenna and a single coax output. I'm shopping for a combo antenna, probably will buy the winegard 7694, it has good gain and the towers are approximately <30 miles from my home. Any preference on uhf/vhf antennas?

acamus,

The...

Winegard HD7694P

is a great Antenna, but I think you're cutting it a little too close on the Range.

The usual "Rule of Thumb" is, to multiply the distance from you to the Transmitter by 1.5, and select an Antenna on that mileage.

That would make the...

Winegard HD7696P

a better choice, and, you'd have a little better Gain too.

Now, this is assuming that you're going to leave it stationary at your 45° Azimuth.
Had you thought of ever putting a Rotator on your system ?
If that is a consideration, then the Antenna suggested above, would be short of reaching out to your CW station at 214°, and I would say that the...

Winegard HD7697P

would be the choice there.

In either case, I think you're going to have to get another Amp, and the one I mentioned in my previous post, would work well with either of the proposed Antennas.

Have a good Day !
S.W.

PS: The word "Combo" is generally associated with a Full Range Antenna (Ch 2-69).

You have a dedicated UHF antenna. I would recommend that you get a dedicated VHF antenna such as the AntennaCraft Y5-7-13 Highband-Broadband VHF Yagi. You will get the best results with dedicated antennas. Combos are not as good and for convienence only. I use the antenna suggested and I am 30+ miles from the towers as well, and I have excellent results. No complaints, no dropouts. And it is inexpensive as well.

acamus,

I'll definitely go along with Splicer recommendation for the Y5, IF you want to go with a combined system. Since you're dong the 300 ohm, I'd use the...

Winegard SD3700

to put those two together.
Splicer, have you used one of those, or do you do Coax ?

I'll say this though...
I think Splicer is the luckiest guy around, when it comes to combining Antennas,
Not everyone has very good luck doing that.

Have a good Day !
S.W.

The OP absolutely DOES NOT need the
http://www.solidsignal.com/prod_disp...p?prod=SD-3700

, since he already has a combining pre-amp. He has 1-300ohm UHF in & 1-300ohm VHF in & 1-75ohm out. So the combiner/balun is built in. Nothing else needs to be added.

To answer Houstons question, I use a UVSJ to combine UHF & VHF:
Pico Macom UVSJ UHF VHF Band Separator/Combiner for Antenna (UVSJ) - Pico Macom - UVSJ - UVSJ - UVSJ

mounted on the mast. To join the 2 U4000 antennas, I use a balun on both joined with a section of RG6.

Wow, many suggestions. Well I ordered the winegard 7696p, $92.50 delivered. I'm only a little worried about weight and wind resistance. 3 years ago the original antenna, a gift from a friend, broke due to ice build up. The antenna I presently have I'm sure is a Channelmaster. I don't remember the model. It has four bow-ties equaly spaced on approximately 36 inch square wire mesh reflector. It has had ice on it and withstood heavy winds last year without fail. Is there any secret to keeping the ice of the yagi models?