Transue
Sent: Monday, September 01, 2008 9:09 PM
To: Repeater-Builder@yahoogroups.com
Cc: [EMAIL PROTECTED]
Subject: RE: [Repeater-Builder] Wits End -- Desense
Eric, Bob, and many other good folks,
Success This being a holiday, I could not get RG400 to replace
the cable from the TX
Congratulations John!
And we can certainly afford to buy replacement custom cables.
73, Tom n4zpt
John Transue wrote:
Eric, Bob, and many other good folks,
Success This being a holiday, I could not get RG400 to replace
the cable from the TX to the connector on the back of the
Subject: RE: [Repeater-Builder] Wits End -- Desense
Chuck, John Bob, Derek, Eric, Mike, JohnB, and Tom,
Thank you all for the helpful suggestions.
The connectors appear to be perfect, and they check out with DC.
The cable on the RX side is double shielded RG142B/U. The cable
@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of John Transue
Sent: Sunday, August 31, 2008 6:42 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Wits End -- Desense
JohnR,
Thanks for the explanation. I'll look at the web site. I suppose the
capacitance should
Eric and the group, I had a similar comment offered to me per your comments
below. This reduced DRAMATICALLY the desense in my machine / rack. If it
were me I would certainly start there. My cables were made at the RF
Connection in MD to the lengths and gender that I requested. The cost was
well
Eric,
Comments are in red.
Thanks.
JohnT
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Eric Lemmon
Sent: Monday, September 01, 2008 11:53 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Wits End -- Desense
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of John Transue
Sent: Monday, September 01, 2008 9:31 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Wits End -- Desense
Eric,
Comments are in red.
Thanks.
JohnT
At 8/31/2008 17:18, you wrote:
John, Check this link to see a picture of a feed thru cap:
http://www.surplussales.com/Capacitors/CapacitorsAll.htmlhttp://www.surplussales.com/Capacitors/CapacitorsAll.html
73 John VE3AMZ
The feedthru filters are also very good for DC power filtering. They
Eric, Bob, and many other good folks,
Success This being a holiday, I could not get RG400 to replace
the cable from the TX to the connector on the back of the repeater, so I
built a shield to completely enclose the cable. I also wrapped aluminum
tape around the receive cable in the
I've tried everything, it seems, and I still have desense!!
Even when I connect only the repeater (Yaesu Musen FTR-1510) and a
controller (needed to make the repeater transmit) and put a dummy load
on the TX out, I get desense.
Following up on Eric's suggestion about holes leaking RF, I sealed
: [Repeater-Builder] Wits End -- Desense
I've tried everything, it seems, and I still have desense!!
Even when I connect only the repeater (Yaesu Musen FTR-1510) and a
controller (needed to make the repeater transmit) and put a dummy load on
the TX out, I get desense.
Following up on Eric's suggestion
: Sunday, August 31, 2008 12:30 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Wits End -- Desense
John,
You really need to use accurate test equipment, preferably a service
monitor, to verify your frequencies. Yes, my old Singer service monitor
is not good enough
Try putting a one inch dia, single turn loop on the end of a coax
feed line to a receiver. Use it to sniff around inside the box to find the RF.
73 de KN6TD
(s) Derek
At 11:42 AM 8/31/2008 -0400, you wrote:
I've tried everything, it seems, and I still have desense!!
Even when I connect
PROTECTED]
Sent: Sunday, August 31, 2008 1:35 PM
Subject: RE: [Repeater-Builder] Wits End -- Desense
Eric,
Comments/answers interspersed below.
Thanks for the help. I believe you are confirming that the problem is within
the box, probably the cables.
John
-Original
At 8/31/2008 10:35, you wrote:
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Eric Lemmon
Sent: Sunday, August 31, 2008 12:30 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Wits End -- Desense
The Yaesu FTR
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, August 31, 2008 2:43 PM
Subject: Re: [Repeater-Builder] Wits End -- Desense
John, Make sure that every wire going in to the RX and TX box has a feed
thru cap in series
with it.
Also you might put a few small ferrite beads on each wire
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Chuck Kelsey
Sent: Sunday, August 31, 2008 3:06 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Wits End -- Desense
I was wondering the same thing. Has someone added some
might see a picture of them there as they use
them on their
Tx and Rx assemblies.
John VE3AMZ
- Original Message -
From: John Transue
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, August 31, 2008 4:55 PM
Subject: RE: [Repeater-Builder] Wits End -- Desense
Chuck, John
the physics work.
Thanks again,
JohnT
-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of
Chuck Kelsey
Sent: Sunday, August 31, 2008 3:06 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Wits End -- Desense
@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Derek J. Lassen
Sent: Monday, 1 September 2008 4:20 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Wits End -- Desense
Try putting a one inch dia, single turn loop on the end of a coax feed line
to a receiver. Use it to sniff
Mark,
I'll try that. Thanks.
John
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Mark Harrison
Sent: Sunday, August 31, 2008 8:49 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Wits End -- Desense
, August 31, 2008 8:16 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Wits End -- Desense
John, Feed thru capacitors look like a peice of wire with a blob in
the middle,
and have a 1/4 locknut on one side. You drill the chassis and insert
the feed thru cap then
mount
@yahoogroups.com
Sent: Sunday, August 31, 2008 4:55 PM
Subject: RE: [Repeater-Builder] Wits End -- Desense
Chuck, John Bob, Derek, Eric, Mike, JohnB, and Tom,
Thank you all for the helpful suggestions.
The connectors appear to be perfect, and they check out with DC.
The cable on the RX side
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