I think we are making much ado about nothing here. Certainly, for UHF
and VHF duplexers, the lengths of the cables that came with it should be
fine for the ham band as well. At least I've never seen one that it
matters. Now, I suppose moving one that is for 160-175 down to 146,
yeah, you'd have
Group,
While looking for something yesterday I found a box that I have not
opened in a "few" years. Inside is a file marked Duplexers containing
many articles and booklets on the subject. There is also a binder from
TxRx with all sorts of technical information on their products,
including
> (It's easier to see this than to describe it in e-mail. Maybe someone
> will send some screen-shots of what it looks like someday... I've tried
> taking photos of my IFR 1500 with my cheap digital camera (4MP
> point-and-shoot Nikon) and it just doesn't look right.
Each message I read makes
Mike Dietrich wrote:
> I asked that question for most of the people on the list that have not
> tuned a duplexer themselves or don't have the proper test equip to do it
> right and have done it with 2 radios or signal gen and a receiver.
> These work but it is so much easier with a tracking gener
bles in and see how much the tuning changes, but will try that
and see how much it changes.
Thanks,
Mike
- Original Message -
From: Nate Duehr
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, July 24, 2008 7:07 PM
Subject: Re: [Repeater-Builder] Duplexer cables
Mike D
Mike Dietrich wrote:
> What is the best way(hookup) to "test" cables like these to see if they
> are resonant on a particular freq?
> With or without the coupling loops attached etc. for duplexers say
The technique I've seen used and participated in is to test the entire
section of the duplexer
groups.com
Sent: Thursday, July 24, 2008 4:10 PM
Subject: Re: [Repeater-Builder] Duplexer cables - Data Base Idea
Shanon KA8SPW wrote:
> Here is an idea.
>
> How about those of us who have repeaters with duplexers take
> measurements and post them.
1. I'm not d
sday, July 24, 2008 3:56 PM
Subject: Re: [Repeater-Builder] Duplexer cables
Alexandre Souza wrote:
>> For RG214 which has a velocity factor of 0.66 at 147 the cables would be
>> about 13.25 inches. Now the type of connectors can influence this in that
>> the connector t
Shanon KA8SPW wrote:
> Here is an idea.
>
> How about those of us who have repeaters with duplexers take
> measurements and post them.
1. I'm not disconnecting all my working system's cables to measure
things. Messing with cables and connectors is a sure-fire way to
introduce new problems
Alexandre Souza wrote:
>> For RG214 which has a velocity factor of 0.66 at 147 the cables would be
>> about 13.25 inches. Now the type of connectors can influence this in that
>> the connector type might lengthen the cable. N-connectors protude beyond
>> the cable where PL259s do not.
>
>
Shanon,
Are you considering coding a database front end (GUI)?
Chris
- Original Message
From: Shanon KA8SPW <[EMAIL PROTECTED]>
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, July 22, 2008 7:14:04 AM
Subject: Re: [Repeater-Builder] Duplexer cables - Data Base Idea
Here
Here is an idea.
How about those of us who have repeaters with duplexers take
measurements and post them. This would need to include ALL the
information or as much as possible. Even the frequency in use, length
and brand would help. The best information would be from duplexers that
were o
> For RG214 which has a velocity factor of 0.66 at 147 the cables would be
> about 13.25 inches. Now the type of connectors can influence this in that
> the connector type might lengthen the cable. N-connectors protude beyond
> the cable where PL259s do not.
Now there is an intersting que
ps.com
>Subject: [Repeater-Builder] Duplexer cables
>
>After searching the site I have not been able to figure the cable
>lenghts I need. Does anyone have the lenghts to bring a Decibel
>Model # DB4060 duplexer down to 147Mhz?
>
>David Epley, N9CZV
>
After searching the site I have not been able to figure the cable
lenghts I need. Does anyone have the lenghts to bring a Decibel
Model # DB4060 duplexer down to 147Mhz?
David Epley, N9CZV
[EMAIL PROTECTED]
Winchester, Indiana
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