Re: [Flexradio] Behringer DEQ2496 RFI Spikes

[Chuck ONeal]

Mark,

How far away is your transmit antenna from the rig/audio chain?

Chuck K1KW

- Original Message - 
From: "Mark Weidhaas" 

To: 
Sent: Friday, February 24, 2012 2:43 PM
Subject: [Flexradio] Behringer DEQ2496 RFI Spikes



I have tried cheater plugs with no luck. I have ferrites on everything. I
have chokes on my antenna line, both directly outside my shack and at the
33' vertical antenna base. If I lay my mic / headset on my desk, the 
spikes
go away. As soon as I touch the headsets, the spikes come back. I use a 
Heil

foot switch for PTT. I even tried audio transformers on both the headset
audio and mic inputs. It seems "I am in the ground loop"..

Original Post

with my Flex 5000A. My shack is on the second floor of my house so RFI is 
a
constant problem. Using only my Behringer Xenyx802 mixer board and my 
5000A
there are no major RFI problems. I have isolated the 802 from the 
ballanced
line input on the 5000A with a Jensen JT-11P-1 audio transformer. When I 
add
the DEQ2496 I get an RFI spike at about 2~3 Hz. I can see the spike on 
both
the 5000A panadapter and on an oscilloscope tapped at my 811H amp output. 
I
have tried various audio isolation techniques but no joy. The spiking is 
the

most pronounced with the amp on. Has anyone encountered this issue and
solved this problem ? if so please advise.>


Mark Weidhaas
W7MGW
TRA 11810 / NAR 87698 / L3
Mobile: (602) 300-5114
mweidh...@cox.net

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Re: [Flexradio] Behringer DEQ2496 RFI Spikes

[Bill Winkis]

Absolute ...most of the Behringer pre-audio enhancement equipment suffer
from weak power supplies...yes; a couple of Ferrite Blocks will take care of
the issue, also you can examine the supply and install a couple of .01
capacitors
Bill  KC4PE

-Original Message-
From: flexradio-boun...@flex-radio.biz
[mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Tim Ellison, W4TME
Sent: Thursday, February 23, 2012 10:10 PM
To: flexradio@flex-radio.biz
Subject: Re: [Flexradio] Behringer DEQ2496 RFI Spikes

Pin 1 problem?
http://pin1problem.com/

RF coming through the AC safety ground (ground loop)?

Tim Ellison, W4TME
Product Management, Sales & Support
FlexRadio Systems^(TM)
4616 W Howard Ln, Suite 1-150
Austin, TX 78728
Phone: 512-535-4713 Ext. 223
Email: t...@flexradio.com <mailto:t...@flexradio.com>
Web: www.flexradio.com <http://www.flexradio.com>

logo


On 2/23/2012 10:06 PM, Michael Walker wrote:
> Hi Mark
>
> Sounds like you  may need to install some Mix 31 and Mix 43 torroids to
> start to knock the RF down.  Since it is worse with the Amp on, it seems
> related to RFI.
>
> I would start with each and every power lead and then work on the audio
> leads.
>
> Google YCCC and Choke and you will find the PDF that Chuck W1HIS
assembled.
>   You will find it very informative.
>
> Mike va3mw
>
>
> On Thu, Feb 23, 2012 at 9:20 PM, Mark Weidhaas  wrote:
>
>> I have been trying to integrate a Behringer DEQ2496 into my audio chain
>> with
>> my Flex 5000A. My shack is on the second floor of my house so RFI is a
>> constant problem. Using only my Behringer Xenyx802 mixer board and my
5000A
>> there are no major RFI problems. I have isolated the 802 from the
ballanced
>> line input on the 5000A with a Jensen JT-11P-1 audio transformer. When I
>> add
>> the DEQ2496 I get an RFI spike at about 2~3 Hz. I can see the spike on
both
>> the 5000A panadapter and on an oscilloscope tapped at my 811H amp output.
I
>> have tried various audio isolation techniques but no joy. The spiking is
>> the
>> most pronounced with the amp on. Has anyone encountered this issue and
>> solved this problem ? if so please advise.
>>
>> Mark Weidhaas
>> W7MGW
>> TRA 11810 / NAR 87698 / L3
>> Mobile: (602) 300-5114
>> mweidh...@cox.net
>>
>> ___
>> FlexRadio Systems Mailing List
>> FlexRadio@flex-radio.biz
>> http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz
>> Archives: http://www.mail-archive.com/flexradio%40flex-radio.biz/
>> Knowledge Base: http://kc.flexradio.com/  Homepage:
>> http://www.flexradio.com/
>>
> ___
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http://www.flexradio.com/
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Re: [Flexradio] Behringer DEQ2496 RFI Spikes

[Craig Gagner]

Mark, I just sent you an e-mail with a copy of the article I wrote on using
rack gear, please let me know if it works for you. I had the same spike
problem and resolved it using these settings.

Craig

-Original Message-
From: flexradio-boun...@flex-radio.biz
[mailto:flexradio-boun...@flex-radio.biz] On Behalf Of Mark Weidhaas
Sent: Thursday, February 23, 2012 9:20 PM
To: flexradio@flex-radio.biz
Subject: [Flexradio] Behringer DEQ2496 RFI Spikes

I have been trying to integrate a Behringer DEQ2496 into my audio chain with
my Flex 5000A. My shack is on the second floor of my house so RFI is a
constant problem. Using only my Behringer Xenyx802 mixer board and my 5000A
there are no major RFI problems. I have isolated the 802 from the ballanced
line input on the 5000A with a Jensen JT-11P-1 audio transformer. When I add
the DEQ2496 I get an RFI spike at about 2~3 Hz. I can see the spike on both
the 5000A panadapter and on an oscilloscope tapped at my 811H amp output. I
have tried various audio isolation techniques but no joy. The spiking is the
most pronounced with the amp on. Has anyone encountered this issue and
solved this problem ? if so please advise.
 
Mark Weidhaas
W7MGW
TRA 11810 / NAR 87698 / L3
Mobile: (602) 300-5114
mweidh...@cox.net




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Re: [Flexradio] Behringer DEQ2496 RFI Spikes

[Tim Ellison, W4TME]

Pin 1 problem?
http://pin1problem.com/

RF coming through the AC safety ground (ground loop)?

Tim Ellison, W4TME
Product Management, Sales & Support
FlexRadio Systems^(TM)
4616 W Howard Ln, Suite 1-150
Austin, TX 78728
Phone: 512-535-4713 Ext. 223
Email: t...@flexradio.com 
Web: www.flexradio.com 

logo


On 2/23/2012 10:06 PM, Michael Walker wrote:

Hi Mark

Sounds like you  may need to install some Mix 31 and Mix 43 torroids to
start to knock the RF down.  Since it is worse with the Amp on, it seems
related to RFI.

I would start with each and every power lead and then work on the audio
leads.

Google YCCC and Choke and you will find the PDF that Chuck W1HIS assembled.
  You will find it very informative.

Mike va3mw


On Thu, Feb 23, 2012 at 9:20 PM, Mark Weidhaas  wrote:


I have been trying to integrate a Behringer DEQ2496 into my audio chain
with
my Flex 5000A. My shack is on the second floor of my house so RFI is a
constant problem. Using only my Behringer Xenyx802 mixer board and my 5000A
there are no major RFI problems. I have isolated the 802 from the ballanced
line input on the 5000A with a Jensen JT-11P-1 audio transformer. When I
add
the DEQ2496 I get an RFI spike at about 2~3 Hz. I can see the spike on both
the 5000A panadapter and on an oscilloscope tapped at my 811H amp output. I
have tried various audio isolation techniques but no joy. The spiking is
the
most pronounced with the amp on. Has anyone encountered this issue and
solved this problem ? if so please advise.

Mark Weidhaas
W7MGW
TRA 11810 / NAR 87698 / L3
Mobile: (602) 300-5114
mweidh...@cox.net

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Re: [Flexradio] Behringer DEQ2496 RFI Spikes

[Michael Walker]

Hi Mark

Sounds like you  may need to install some Mix 31 and Mix 43 torroids to
start to knock the RF down.  Since it is worse with the Amp on, it seems
related to RFI.

I would start with each and every power lead and then work on the audio
leads.

Google YCCC and Choke and you will find the PDF that Chuck W1HIS assembled.
 You will find it very informative.

Mike va3mw


On Thu, Feb 23, 2012 at 9:20 PM, Mark Weidhaas  wrote:

> I have been trying to integrate a Behringer DEQ2496 into my audio chain
> with
> my Flex 5000A. My shack is on the second floor of my house so RFI is a
> constant problem. Using only my Behringer Xenyx802 mixer board and my 5000A
> there are no major RFI problems. I have isolated the 802 from the ballanced
> line input on the 5000A with a Jensen JT-11P-1 audio transformer. When I
> add
> the DEQ2496 I get an RFI spike at about 2~3 Hz. I can see the spike on both
> the 5000A panadapter and on an oscilloscope tapped at my 811H amp output. I
> have tried various audio isolation techniques but no joy. The spiking is
> the
> most pronounced with the amp on. Has anyone encountered this issue and
> solved this problem ? if so please advise.
>
> Mark Weidhaas
> W7MGW
> TRA 11810 / NAR 87698 / L3
> Mobile: (602) 300-5114
> mweidh...@cox.net
>
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> FlexRadio Systems Mailing List
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> Knowledge Base: http://kc.flexradio.com/  Homepage:
> http://www.flexradio.com/
>
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