Re: [Repeater-Builder] Dual receivers on one antenna for RX only site

2010-03-10 Thread Nate Duehr
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 facebook.com/denverpilot twitter.com/denverpilot

RE: [Repeater-Builder] Dual receivers on one antenna for RX only site

2010-03-10 Thread Gary Schafer
-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

Re: [Repeater-Builder] Dual receivers on one antenna for RX only site

2010-03-09 Thread Nate Duehr
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

RE: [Repeater-Builder] Dual receivers on one antenna for RX only site

2010-03-09 Thread Gary Schafer
@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

Re: [Repeater-Builder] Dual receivers on one antenna for RX only site

2010-03-09 Thread Nate Duehr
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

RE: [Repeater-Builder] Dual receivers on one antenna for RX only site

2010-03-09 Thread Gary Schafer
_ 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

Re: [Repeater-Builder] Dual receivers on one antenna for RX only site

2010-03-09 Thread wd8chl
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

Re: [Repeater-Builder] Dual receivers on one antenna for RX only site

2010-03-09 Thread Paul Plack
- 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

Re: [Repeater-Builder] Dual receivers on one antenna for RX only site

2010-03-09 Thread no6b
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?