[222mhz] 220 duplexer

[cboone at earthlink.net]

Ive been doing rpts/duplexers/cavities for 35 years...My current set up is my personally owned IFR-1500 and the cables are double shielded RG-400. The notches are real ;)

Chris
WB5ITT


-----Original Message-----
>From: "Dr. Gerald N. Johnson" <g369n849j at weather.net>
>Sent: Oct 18, 2010 11:42 AM
>To: 222mhz at mailman.qth.net
>Subject: Re: [222mhz] 220 duplexer
>

>Be sure the notch you see is only from the cans and not from the signal 
>passed by the cans canceling the signal leaked between source and 
>indicator coax cables. That happens with singly shielded cables in the 
>test setup and connecting the cans. That can also come from signal 
>generator and detector with some RF leakage even with good double 
>shielded braid coax or modern corrugated foam insulated partly flexible 
>heliax.
>
>73, Jerry, K0CQ
>>