On Mar 9, 2010, at 5:54 PM, Gary Schafer wrote:
Yep, that's what we got on the e-mail side of things... did you mean to send a
completely blank reply, Gary?
--
Nate Duehr, WY0X
n...@natetech.com
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-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
buil...@yahoogroups.com] On Behalf Of wd8chl
Sent: Tuesday, March 09, 2010 11:07 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Dual receivers on one antenna for RX
only site
Answers below
On 3/9/2010 8:29 AM, Ross Johnson wrote:
Can a dualband antenna VHF/UHF for RX ONLY be fed to two receivers one
VHF, one UHF, without a quote duplexer using a T instead?
Yes. Typically performance is better with mono-band antennas, since all
multiband antennas are a
@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Nate Duehr
Sent: Tuesday, March 09, 2010 5:11 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Dual receivers on one antenna for RX only
site
Answers below
On 3/9/2010 8:29 AM, Ross Johnson wrote
On 3/9/2010 4:53 PM, Gary Schafer wrote:
Without the proper length cables between the cavities and the antenna
T connector both UHF and VHF signals will be attenuated depending on
the luck of the cable length.
What technical reason causes this?
Nate
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Nate Duehr
Sent: Tuesday, March 09, 2010 7:24 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Dual receivers on one antenna for RX only
site
On 3/9/2010 4:53
Gary Schafer wrote:
Quarter wave length cables are the thing to use to couple the cavities
together at the antenna connection side of them.
The uhf cavity gets a cable that is a quarter wave length at the VHF
frequency and the VHF cavity gets a cable that is a quarter wave length at
the UHF
- Original Message -
From: Gary Schafer
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, March 09, 2010 4:53 PM
Subject: RE: [Repeater-Builder] Dual receivers on one antenna for RX only site
The UHF cavity loop provides a short circuit at the VHF frequency but the
quarter wave
At 3/9/2010 20:12, you wrote:
OK, question...
If you put a cable which is 1/4-wavelength at VHF between the T and the
UHF cavity, it's 3/4-wavelength at UHF. Since any odd multiple of a
quarter wavelength will invert the impedance, what will this really
accomplish on the UHF cavity side?
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