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11-Jun-2015, 8:04 PM
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#2
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Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,753
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You have some very strong signals that might overload the preamp.
What signals are you getting, by real channel?
What signals do you want that you are not getting?
Why aren't you happy with your present setup?
If you use a preamp and your present distribution amp, your tuner will probably be overloaded.
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i cut off boom in half and some VHF elements left only 3 VHF on the back,the antenna is the one that is in my avatar,just don't use the rota-tor no more cause it failed.
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For best reception of digital signals, your antenna should be aimed the transmitter. What direction are you going to settle on?
Last edited by rabbit73; 11-Jun-2015 at 8:14 PM.
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11-Jun-2015, 8:13 PM
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#3
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Junior Member
Join Date: Apr 2012
Posts: 25
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Quote:
Originally Posted by rabbit73
You have some very strong signals that might overload the preamp.
What signals are you getting, by real channel?
What signals do you want that you are not getting?
Why aren't you happy with your present setup?
If you use a preamp and your present istribution amp, your tuner will probably be overloaded.
For best reception of digital signals, your antenna should be aimed the transmitter. What direction are you going to settle on?
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Thanks what i want to do is to take out this one that is close to the receiver that is amplifying antenna signal' i have fear signal from about 50 miles out of Boston
http://forums.qrz.com/showthread.php...two-RG6-cables
and replace with this one close to antenna.
http://www.amazon.com/Winegard-LNA-2...enna+amplifier
Last edited by frank55; 11-Jun-2015 at 8:16 PM.
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11-Jun-2015, 8:13 PM
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#4
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Antennas Direct Tech Supp
Join Date: Jan 2010
Posts: 2,942
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Unless there are factors you haven't told us, you don't need an amp.
If you did need one, you'd be better off moving the one you already have outside to the antenna (use a remote power inserter, Commscope SVPI, or equivalent) or as close to the antenna as possible (shortest cable).
FWIW, putting an amp right at the input of a tuner is usually a waste of an amp. There's only a very small improvement possible with the amp at the wrong end of the coax.
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11-Jun-2015, 8:27 PM
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#5
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Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,753
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Quote:
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i have fear signal from about 50 miles out of Boston
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Huh? Does that mean you want Boston signals in addition to local Providence signals?
Are you getting any Boston signals now?
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11-Jun-2015, 9:45 PM
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#6
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Junior Member
Join Date: Apr 2012
Posts: 25
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Quote:
Originally Posted by rabbit73
Huh? Does that mean you want Boston signals in addition to local Providence signals?
Are you getting any Boston signals now?
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I'm already getting most Boston chan , these are the chan i get with great quality with the set up i have.
http://tvlistings.aol.com/listings/m...-the-air/02720
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11-Jun-2015, 9:58 PM
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#7
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Junior Member
Join Date: Apr 2012
Posts: 25
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Quote:
Originally Posted by ADTech
Unless there are factors you haven't told us, you don't need an amp.
If you did need one, you'd be better off moving the one you already have outside to the antenna (use a remote power inserter, Commscope SVPI, or equivalent) or as close to the antenna as possible (shortest cable).
FWIW, putting an amp right at the input of a tuner is usually a waste of an amp. There's only a very small improvement possible with the amp at the wrong end of the coax.
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but i already have this 15db amp see link,i know that this is a distribution amp that i use between antenna and receiver and it improves signal by a few bars,
you mean i can use this close to the antenna instead close to the OTA receiver inside the house?can i take the 12v power supply up to this distribution amp up to the antenna?
http://forums.qrz.com/showthread.php...two-RG6-cables
i can use this one
http://www.amazon.com/PCT-Inserter-M...power+inserter
Last edited by frank55; 11-Jun-2015 at 10:17 PM.
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11-Jun-2015, 10:50 PM
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#8
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Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,753
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Quote:
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you mean i can use this close to the antenna instead close to the OTA receiver inside the house?
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Yes, you can use the Commscope SVPI Power Inserter to send the power up to the amp by the antenna on the same coax for the signal that comes down to the power inserter and TV. The PCT power inserter would probably work OK.
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can i take the 12v power supply up to this distribution amp up to the antenna?
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No, don't do that. It should stay inside near the TV and power inserter. See Attachments.
http://www.commscope.com/Docs/Amplif...llation_II.pdf
http://www.commscope.com/catalog/bro...id=45299&tab=3
Last edited by rabbit73; 11-Jun-2015 at 11:28 PM.
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12-Jun-2015, 4:07 PM
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#9
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Junior Member
Join Date: Apr 2012
Posts: 25
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Quote:
Originally Posted by rabbit73
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Thanks rabbit73; appreciate, also if i to decide to get another antenna
rota-tor which is the most reliable,
my present antenna mast rota-tor craft TDP-2 died and i did barely used it ,and going up in the roof is an hassle,this is the one i have the control still works. see link
i 'd like an Ham Rota-tor but they are expensive as hell
http://www.ebay.com/itm/like/2618192...466&rmvSB=true
Last edited by frank55; 12-Jun-2015 at 4:33 PM.
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15-Jun-2015, 4:13 PM
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#11
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Junior Member
Join Date: Apr 2012
Posts: 25
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Quote:
Originally Posted by rabbit73
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Thanks for the info.
I seems to me that Ham only build Ham rotators for Cbs, why not to build Ham rota-tors for VHF/UHF OTA for a fare price ? the Ham rotator s prices are absurd
Last edited by frank55; 15-Jun-2015 at 4:25 PM.
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21-Jun-2015, 3:40 PM
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#12
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Junior Member
Join Date: Apr 2012
Posts: 25
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Quote:
Originally Posted by rabbit73
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Hi rabbit73; i went up in the roof and took down the Rotator and opened it and found out there was a missing bolt that fell off,i replaced it and tightened all of them and sprayed some WD oil and connected a small wire between rotator and control and it started to work like new,put back and connected
just like you suggested the SVA15PRSM near the antenna and the SVPI 12 v insert ,i've also put the SVA15PRSM inside a water proof casing ,.
But i had a little upset, the matching transformer that was attached to the antenna to connect the 75 ohms coaxial cable broke when unbolting it,and couldn't find a shop here that sells them, since we had Radio Shack that closed all over USA, i've just thought of connecting the coaxial cable strait to the antenna with terminals till i could get a matching transformer on line,
but for my surprise it works great without matching transformer i guess i don't need it, and with SVA15PRSM i get double channel ,use to get 34 now get 60 chan, of-course they are duplicated chan, to see the difference in signal i use to get on my converter box signal strength meter on WSBK38- 34 bars now it goes to 55,
rabb73 I appreciate your info,due to it i did not waist money on an Amp that maybe would not make my reception better, but with my existing distribution amp i've got a very good improvement on signal and chan. thanks.
Last edited by frank55; 21-Jun-2015 at 3:44 PM.
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21-Jun-2015, 7:23 PM
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#13
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Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,753
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Thanks for the good news; glad it's working better.
Quote:
i've just thought of connecting the coaxial cable strait to the antenna with terminals till i could get a matching transformer on line,
but for my surprise it works great without matching transformer i guess i don't need it,
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Please get a new outdoor matching transformer to keep the water out of the coax.
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22-Jun-2015, 2:49 PM
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#14
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Junior Member
Join Date: Apr 2012
Posts: 25
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Quote:
Originally Posted by rabbit73
Thanks for the good news; glad it's working better.
Please get a new outdoor matching transformer to keep the water out of the coax.
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Thanks ,what matching transformer you suggest?
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22-Jun-2015, 3:36 PM
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#15
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Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,753
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Channel Master 0089 or 94444 outdoor balun.
They have changed the design and I haven't tested the new version.
Some sellers are using the old image with the groove and wire ends with a hook. The new version has ring terminals.
https://www.google.com/?gws_rd=ssl#q...ng+transformer
Last edited by rabbit73; 22-Jun-2015 at 3:40 PM.
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22-Jun-2015, 5:17 PM
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#16
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Junior Member
Join Date: Apr 2012
Posts: 25
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Quote:
Originally Posted by rabbit73
Channel Master 0089 or 94444 outdoor balun.
They have changed the design and I haven't tested the new version.
Some sellers are using the old image with the groove and wire ends with a hook. The new version has ring terminals.
https://www.google.com/?gws_rd=ssl#q...ng+transformer |
I have a weather proof box, i can bring it close to the antenna if i could find a matching transformer with longer tape 300 ohm connectors,i can put it inside the box,i cold buy the smallest and best one available,
Since it brings so many channels connected strait to the antenna without matching transformer was thinking of getting 2 feet of 300 ohms dipole tape, i could make the connection inside the box and solder it to short peace of coaxial with a connector and connect to RF in amp ,what do you think,
if my antenna had good access i would try all this easier,but the antenna is on a 3 store apartment 50 feet high,and is an hassle to get up there,
https://www.google.com/search?q=300+...TsikUDuvM%253B
Last edited by frank55; 22-Jun-2015 at 5:25 PM.
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22-Jun-2015, 9:34 PM
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#17
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Junior Member
Join Date: Apr 2012
Posts: 25
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Quote:
Originally Posted by frank55
I have a weather proof box, i can bring it close to the antenna if i could find a matching transformer with longer tape 300 ohm connectors,i can put it inside the box,i cold buy the smallest and best one available,
Since it brings so many channels connected strait to the antenna without matching transformer was thinking of getting 2 feet of 300 ohms dipole tape, i could make the connection inside the box and solder it to short peace of coaxial with a connector and connect to RF in amp ,what do you think,
if my antenna had good access i would try all this easier,but the antenna is on a 3 store apartment 50 feet high,and is an hassle to get up there,
https://www.google.com/search?q=300+...TsikUDuvM%253B |
Here is the 2 wires that i cut from sat grounding wires and on the 75 ohm side i soldered an F type plug ,do you think it will work at least the same i got now?.
http://postimg.org/image/d161lt343/ef75894e/
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23-Jun-2015, 1:19 PM
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#18
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Retired A/V Tech
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,753
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Quote:
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do you think it will work at least the same i got now?.
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My advice was to restore it to its original design condition using a 4:1 outdoor balun matching transformer.
It's your antenna. You have a right to modify it any way you want.
However, I did enjoy looking at the 300 ohm dipole images in the Google link that you gave. 
Last edited by rabbit73; 23-Jun-2015 at 1:22 PM.
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24-Jun-2015, 9:02 PM
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#19
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Junior Member
Join Date: Apr 2012
Posts: 25
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Quote:
Originally Posted by rabbit73
My advice was to restore it to its original design condition using a 4:1 outdoor balun matching transformer.
It's your antenna. You have a right to modify it any way you want.
However, I did enjoy looking at the 300 ohm dipole images in the Google link that you gave. |
No my friend no more outdoor balloons i had my share of failed balloons,besides i get better performance without it,this is the way i made the connection to the antenna from the SVA15PRSM distribution Amp installed at the antenna mast see pic.
http://postimg.org/image/agsg4gvi7/979953dd/
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