Perfect! except you want the antenna as high as possible! Hi
73
Don
W5DK
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of John Transue
Sent: Wednesday, July 09, 2008 2:18 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Measuring Desense
Okay. I'll do it. Thanks.
John
AF4PD
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of de W5DK
Sent: Wednesday, July 09, 2008 4:06 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Measuring De
nline
version of that article (above) omitted the photos. :-(
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of John Transue
Sent: Wednesday, July 09, 2008 12:18 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Bu
At 12:18 PM 07/09/08, you wrote:
<<...>> Ron, Don, Mark, and others,
The attachment shows how I think I should connect things to measure
desense. I would use the Bird with sampling coupler in place of the
iso tee shown. Does this appear to be a correct way to measure desense?
Also, I can re
At 7/10/2008 00:55, you wrote:
>At 12:18 PM 07/09/08, you wrote:
>
>><<...>> Ron, Don, Mark, and others,
>>
>>The attachment shows how I think I should connect things to measure
>>desense. I would use the Bird with sampling coupler in place of the iso
>>tee shown. Does this appear to be a correc
Ron Wright wrote:
> Bob,
>
> One other note on the VHF lo and 6 m. 6 might improve due to the
> HDTV stations will be able to run considerably lower power. Our Ch
> 10 on VHF hi will go from 42 kW RF, 216 kW ERP, to avarage 2 kW with
> 10 kW peak RF. They will also like the electric bill more,
Probably a multi-path problem hurting the reception to the people close in. I
have seen better distance out of digital, but multi-path problems &
"destructive" interference can kill someone anywhere.
Look at a DTV station on a spectrum analyzer and a yagi- turn the antenna and
watch all the fun
Ron Wright wrote:
> I have a few friends that have gotten their top set boxes for HDTV
> receiving it over the air with antenna and all are so excited about
> the very noticable quality improvement.
>
> If someone is a few miles from a typical TV station and cannot
> receive it with rabit ears it
TGundo 2003 wrote:
> As for picture quality- If it's an SD program it may look the same on
> analog vs digital, but if your HD looks the same then something is
> wrong. Period.
Yeah-there's something wrong alright-it's all hype. DTV is a big rip-off.
At 20:41 7/10/2008, wd8chl wrote:
>Ron Wright wrote:
> > I have a few friends that have gotten their top set boxes for HDTV
> > receiving it over the air with antenna and all are so excited about
> > the very noticable quality improvement.
> >
> > If someone is a few miles from a typical TV station
- Original Message -
From: "Dave Gomberg" <[EMAIL PROTECTED]>
To:
Sent: Friday, July 11, 2008 1:23 PM
Subject: Re: [Repeater-Builder] Measuring Desense
>
> DTV is the new millennium. Those who miss it get to buy cable forever.
>
> NE5EE with 39 digital ch
n Behalf Of Gerald Pelnar
Sent: Friday, July 11, 2008 4:38 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Measuring Desense
- Original Message -
From: "Dave Gomberg" <[EMAIL PROTECTED] <mailto:dave1%40wcf.com> >
To: mailto:Repeater-Builder%4
Here now- In downtown Chicago Comcast is all-digital now. No analog to be found
on the pipe.
Tom
W9SRV
--- On Fri, 7/11/08, Richard <[EMAIL PROTECTED]> wrote:
From: Richard <[EMAIL PROTECTED]>
Subject: RE: [Repeater-Builder] Measuring Desense
To: Repeater-Builder@yahoogroups.com
>>
>> I made an isotee today by cutting off the central pin in a F-M-F
>> tee. I measured the attenuation by comparing the power through the
>> tee to the power that escapes from the isotee port. With the central
>> pin cut off flush with the dielectric the attenuation is about 38
>> dB. With the
I did this by putting a plastic insulated washer between the connectors
and tightened it down until I got the desired attenuation. I then put
some shrink-tube around it to keep the adjustment from moving. This was
my "calibrated tee" for several years.
73, Joe, K1ike
wd8chl wrote:
> Another
On Jul 12, 2008, at 9:31 AM, Ron Wright wrote:
> Understand the FCC has mandated typical coaxial cable keep analog to
> I think 2012 although they can offer digital on the cable as Bright
> House does here.
Their set-top boxes have to provide analog service to the TV itself,
but what they
You can get a very nice, silver-plated, adjustable Microlab/FXR sampler
(isotee) here for $15:
http://www.ridgeequipment.com/store/attenuators.html
I've bought a lot of stuff from Nick and the guys at Ridge Equipment over
the years, both direct, via Ebay, and at Dayton. They have a lot of goodi
On Jul 12, 2008, at 2:18 PM, Jeff DePolo wrote:
>
> You can get a very nice, silver-plated, adjustable Microlab/FXR
> sampler
> (isotee) here for $15:
>
> http://www.ridgeequipment.com/store/attenuators.html
Dang, you found the link before I did. I was looking for that in my
records here.
for desense measurements, and for touching up a receiver front
end through the duplexer. I also use mine to couple my counter to a
transmitter.
73 - Jim W5ZIT
--- On Sat, 7/12/08, Jeff DePolo <[EMAIL PROTECTED]> wrote:
From: Jeff DePolo <[EMAIL PROTECTED]>
Subject: RE: [Repe
> The one I use looks exactly like the one shown, but mine has
> a small disk at the end of the adjustable BNC probe.
> 73 - Jim W5ZIT
The picture in the PDF is for a different model that uses a grounded loop
(HX or HY series), not the capacitively-coupled (electrostatic) HZ series
like the on
n
iso-tee device. Choose wisely.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Jeff DePolo
Sent: Saturday, July 12, 2008 8:15 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Measuring De
> "John Transue" <[EMAIL PROTECTED]> wrote:
> I made the desense measurements, and I can't believe the
> results. I get about 12 to 14 dB of desense. Is that possible?
May not all be desense but what the overall effect you experience
is lumped in together in the same "desense" label.
> I belie
[Repeater-Builder] Measuring Desense
> "John Transue" <[EMAIL PROTECTED]> wrote:
> I made the desense measurements, and I can't believe the
> results. I get about 12 to 14 dB of desense. Is that possible?
May not all be desense but what the overall effect you
I may be able to compare in February, once I can get some signals on the
27" HDTV, as it has the needed tuner for digital and HD.
the adapters for other TV sets, at least the model I got, only have the
RF and plain composite video, no S video even, as I seem to recall.
What I am able to p
dering six cans giving about
100 dB of separation?
John
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of John Transue
Sent: Saturday, July 19, 2008 4:10 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Me
iately availableit is
still up and working as well as it ever did with absolutely no desense.
- Original Message -
From: John Transue
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, August 03, 2008 8:35 AM
Subject: RE: [Repeater-Builder] Measuring Desense
Skipp, Mike, an
EMAIL PROTECTED]
Sent: Sunday, August 03, 2008 11:51 AM
Subject: RE: [Repeater-Builder] Measuring Desense
Scott and Skipp and others,
Thanks, Scott, for the detailed instructions. I went about the testing a
little differently and might have been misled. I put the isotee between the
antenn
one.
>From: Mike Morris WA6ILQ <[EMAIL PROTECTED]>
>Date: 2008/07/10 Thu AM 03:55:04 EDT
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater-Builder] Measuring Desense
>
>At 12:18 PM 07/09/08, you wrote:
>
><<...>>Ron, Don, Mark, and
convert to HDTV and turn off what is now
their UHF HDTV. $1,000,000 being turned off to set.
73, ron, n9ee/r
>From: [EMAIL PROTECTED]
>Date: 2008/07/10 Thu AM 10:03:26 EDT
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater-Builder] Measuring Desense
>
roups.com
>Subject: Re: [Repeater-Builder] Measuring Desense
>
>Regarding the "note" at the end of the article: TV 2, 4 & 5 will go dark at
>the analog/DTV cutover in Feb. 2009. Ironically, 6 meters may become less
>noisy o
At 7/10/2008 07:59, you wrote:
>Ch 2-6 will not go dead in Feb 2007. Some stations will turn off their analog
I forgot to say "in SoCal". No VHF LB HDTV here in SoCal, before or after
the cutover.
Bob NO6B
.
The HDTV will definitely not be running the same power as analog. No reason to.
73, ron, n9ee/r
>From: wd8chl <[EMAIL PROTECTED]>
>Date: 2008/07/10 Thu PM 05:40:29 EDT
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater-Builder] Measuring Desense
>
Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Ron Wright
Sent: Thursday, July 10, 2008 9:04 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: Re: [Repeater-Builder] Measuring Desense
John,
The procedure is primarily measuring the site noise in your
by the cable companies so would be a
chore, but with tech today one chip could proably decode many formats.
73, ron, n9ee/r
>From: Richard <[EMAIL PROTECTED]>
>Date: 2008/07/11 Fri PM 08:04:12 EDT
>To: Repeater-Builder@yahoogroups.com
>Subject: RE: [Repeater-Builder]
me there is only a ch 3 on VHF lo and it is over 50 miles away.
> Nearest ch 2 is over 80 miles.
>
> 73, ron, n9ee/r
>
>
>
>> From: [EMAIL PROTECTED]
>> Date: 2008/07/10 Thu AM 10:03:26 EDT
>> To: Repeater-Builder@yahoogroups.com
>> Subject: Re: [Repeat
Ron Wright wrote:
> Ch 2-6 will not go dead in Feb 2007. Some stations will turn off their
> analog txs and use what they are now using for HDTV probably on UHF, but many
> will turn off the HDTV and convert their analog VHF, lo and hi, to HDTV on
> these lower channels. Our ch 3, EDU educati
ting.
73, ron, n9ee/r
>From: John Transue <[EMAIL PROTECTED]>
>Date: 2008/07/11 Fri PM 07:04:01 EDT
>To: Repeater-Builder@yahoogroups.com
>Subject: RE: Re: [Repeater-Builder] Measuring Desense
>
>
>I madean isotee today by cutting off the central pin
To: Repeater-Builder@yahoogroups.com
Subject: Re: RE: Re: [Repeater-Builder] Measuring Desense
John,
Even if the transmitter was at 100 W the 38 db loss in the isotee would
give only 0.016 watts into the sig gen which believe me would not be a
problem. Sure this is a major signal compared to a typical recei
ilto:[EMAIL PROTECTED] On Behalf Of John Transue
Sent: Saturday, July 12, 2008 6:51 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: RE: Re: [Repeater-Builder] Measuring Desense
Ron, Don, Joe, Jeff, Nate, and others,
Thanks for all the good ideas. And Ron, thanks for explaining tha
uly 19, 2008 11:53 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: RE: Re: [Repeater-Builder] Measuring Desense
I made the desense measurements, and I can't believe the results. I get
about 12 to 14 dB of desense. Is that possible? The measurements are not
precise because the sig
Subject: RE: RE: Re: [Repeater-Builder] Measuring Desense
John,
For a normal radio, 12 dB would only be 2 S-units, so I'd believe what
you're measuring correlates to what you're hearing from the distant ham.
Mike
WM4B
From: Repeater-Builder@yahoogroups.com
[mailto:[
turday, July 19, 2008 8:53 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: RE: Re: [Repeater-Builder] Measuring Desense
I made the desense measurements, and I can't believe the results. I get
about 12 to 14 dB of desense. Is that possible? The measurements are not
precise because the sig
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