Hello,
I have a Radio Shack Amplified VHF/UHF antenna RS 15-2181 that is
missing the power supply/interface module. Does Radio Shack make all
their adapters the same so I could use any adapter from any remote
amplifier? Does anyone have a schematic for the adapter? What is the
voltage that is injected onto the COAX? Could I inject the power
directly into the amplifier in the antenna with a direct power
connection (not through the coax)? The antenna is attic mounted so I
don't have to worry about weather.
Thanks for any input or ideas,
Ted

wrote in message
oups.com...
Hello,
I have a Radio Shack Amplified VHF/UHF antenna RS 15-2181 that is
missing the power supply/interface module. Does Radio Shack make all
their adapters the same so I could use any adapter from any remote
amplifier? Does anyone have a schematic for the adapter? What is the
voltage that is injected onto the COAX? Could I inject the power
directly into the amplifier in the antenna with a direct power
connection (not through the coax)? The antenna is attic mounted so I
don't have to worry about weather.
Thanks for any input or ideas,
Ted

Catalog # 15-2181 Bidirectional "Swept-Wing" Antenna for Local TV Channels

Owner's Manual
http://support.radioshack.com/suppor...oc66/66676.pdf

Detailed Parts List
http://support.radioshack.com/suppor...oc68/68446.htm


N

Sorry,
I should have noted that I got the manual and the no parts list
available message from the Radio Shack site. The manual only makes one
small reference to the power adapter. I got more from looking at the
15-2185 product in the catalog that lists all the parts and shows how
to connect the power adapter in the manual.
Thanks,
Ted

wrote:
Hello,
I have a Radio Shack Amplified VHF/UHF antenna RS 15-2181 that is
missing the power supply/interface module. Does Radio Shack make all
their adapters the same so I could use any adapter from any remote
amplifier? Does anyone have a schematic for the adapter? What is the
voltage that is injected onto the COAX?

Looking at the physical configuration and specifications of their
various products, my guess is that RS amplifier power injectors /
supplies are interchangeable; @12VDC supply voltage.

http://www.radioshack.com/product.as...5Fid=15%2D1170

Could I inject the power
directly into the amplifier in the antenna with a direct power
connection (not through the coax)?

Don't know - is there a separate isolated dc input connection there?

Thanks,
Now that I've looked at other configurations, I agree the DC input is
likely 12VDC. I think I will keep an eye out for the injector at local
garage sales. Hmmm, I wonder what the polarity of the DC is on the
coax. Probably center conduct is +.

No, there is no separate DC input connection at the antenna. I was
thinking I'd just modify the amplifier to supply external power (not
from the coax). The antenna is in the attic so it won't see real
weather. I am assuming there is a choke between the center conductor of
the coax and the power supply in the amplifier that allows the DC from
the coax to pass but stops the RF. If I disconnect ths choke from the
coax, the local amplifier power will not back feed the coax and damage
anything on the receiving side. Then I can supply the DC between the
open end of the choke and ground.

I just noticed the cover of my R-S catalog. It says, "You've got
questions. We've got answers." So then why am I still asking questions?
;-)
Ted

wrote in message
oups.com...

I just noticed the cover of my R-S catalog. It says, "You've got
questions. We've got answers." So then why am I still asking questions?

In what part of that slogan did you see them say they weren't stupid
answers?

N

wrote:
No, there is no separate DC input connection at the antenna. I was
thinking I'd just modify the amplifier to supply external power (not
from the coax). The antenna is in the attic so it won't see real
weather. I am assuming there is a choke between the center conductor
of the coax and the power supply in the amplifier that allows the DC
from the coax to pass but stops the RF. If I disconnect ths choke
from the coax, the local amplifier power will not back feed the coax
and damage anything on the receiving side. Then I can supply the DC
between the open end of the choke and ground.

That's a lot of work for $34 (the cost of an inline amp with PS from
R/S). Wouldn't you have to run power to the antenna location? Plus all
the effort in modifying the antenna. Besides, using a separate inline
amp gives you the flexibility of upgrading the antenna later if you want
to.

It is your time and your money, so you decide. But if it were me, I'd
take the easy route.