[Repeater-Builder] Re: Circulator vs. Isolator

2005-01-22 Thread skipp025
Wouldn't the second harmonic of a 1/4 cavity contain minimal F2 rf energy? (The 3rd harmonic is another issue) cheers, skipp Jim B. [EMAIL PROTECTED] wrote: ... because cavities can frequently be resonant on the second harmonic (or higher), which is what you're trying to filter out.

[Repeater-Builder] Re: Circulator vs. Isolator

2005-01-22 Thread wn1b8
Eric, Jim, and others, Thanks for the replies. Your explanations were as I expected but I wanted to be certain. I am very familliar with circulators as we use them quite often in microwave configurations. When I became aware of isolators, I attempted to research them and concluded that there

Re: [Repeater-Builder] Re Circulator

2004-10-08 Thread Eric Lemmon
Andy, My understanding of British radio terminology is not complete, so I am a little confused by your statement about the receive port of the circulator. In circulator (isolator) applications I am familiar with, the input of the circulator connects directly to the transmitter output, the

Re: [Repeater-Builder] Re Circulator

2004-10-08 Thread grizzarv
From: Eric Lemmon [EMAIL PROTECTED] Date: Thu, 07 Oct 2004 18:49:13 -0700 Subject: Re: [Repeater-Builder] Re Circulator Andy, My understanding of British radio terminology is not complete, so I am a little confused by your statement about the receive port of the circulator

[Repeater-Builder] Re Circulator

2004-10-07 Thread Andy Hearn
HI I have just changed my 70 cm repeater antenna over to a co-linear 8 dBd gain, was running 2 full wave dipoles stacked (reason..antenna faults and not able to mount with correct vertical spacing). When I was calibrating the circulator on the bench, all set up perfectly, with the receive

Re: [Repeater-Builder] Re Circulator

2004-10-07 Thread Andy Hearn
: Thursday, October 07, 2004 9:57 PM Subject: Re: [Repeater-Builder] Re Circulator Should not your circulator be on the transmit side before the duplexer? All of mine are. 73 Russ, W3CH Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group

Re: [Repeater-Builder] Re Circulator

2004-10-07 Thread russ
Should not your circulator be on the transmit side before the duplexer? All of mine are. 73 Russ, W3CH - Original Message - From: Andy Hearn [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, October 07, 2004 1:07 PM Subject: [Repeater-Builder] Re Circulator

Re: [Repeater-Builder] Re Circulator

2004-10-07 Thread Andy Hearn
Andy - Original Message - From: russ [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Thursday, October 07, 2004 9:57 PM Subject: Re: [Repeater-Builder] Re Circulator Should not your circulator be on the transmit side before the duplexer? All of mine are. 73 Russ, W3CH