I love Willi's practical approach to things. I mean it is not as if we
are attempting to preserve the beauty of this black box! I did exactly
this on a radio I was having trouble with doing a demo. I do suspect
that there are some who would feel uncomfortable removing the stack to
drill
I started this thread about poor sideband suppression. Just so you
all know, this is not a case of poor cable connections, an avenue I
diligently explored. I do believe the stereo mini jacks leave
something to be desired but they are not the source of my opposite
sideband grunk
Jon, K6EK
Barry VE4MA
- Original Message -
From: K6JEK [EMAIL PROTECTED]
To: Flexradio flexradio@flex-radio.biz
Sent: Wednesday, September 27, 2006 10:42 AM
Subject: Re: [Flexradio] Poor sideband suppression
I started this thread about poor sideband suppression. Just so you
all know
If there's a Radio Shack nearby, they also sell
ground-loop isolators:
http://www.radioshack.com/product/index.jsp?productId=2062214
- Jeff, K6jca
--- A.R.S. - W5AMI [EMAIL PROTECTED] wrote:
Jon,
Do you have any stereo 1:1 audio isolation xfmrs
laying around? If
so, try inserting one
Jon,
Do you have any stereo 1:1 audio isolation xfmrs laying around? If
so, try inserting one between your presonus connections and the
line-in jack of the SDR-1000. Make sure whatever xfmr you use, it has
a good flat audio curve. I use a Scosche car audio device:
PROTECTED]; K6JEK [EMAIL PROTECTED]
Cc: Flexradio flexradio@flex-radio.biz
Sent: Wednesday, September 27, 2006 12:14 PM
Subject: Re: [Flexradio] Poor sideband suppression
The EBTech Hum Eliminator is good too. It will accept balanced or
unbalanced connections and the frequency response id 20
, September 27, 2006 1:39 PM
To: FlexRadio
Subject: Re: [Flexradio] Poor sideband suppression
Here is a little blurb on these isolators if you prefer to build your
own.
They are simple, but some care should be taken when choosing the
transformer(s):
http://www.tkk.fi/Misc/Electronics/circuits
] On Behalf Of Mel Whitten
Sent: Wednesday, September 27, 2006 1:39 PM
To: FlexRadio
Subject: Re: [Flexradio] Poor sideband suppression
Here is a little blurb on these isolators if you prefer to build your
own.
They are simple, but some care should be taken when choosing the
transformer(s):
http
gl
SM6OMH Willi
- Original Message -
From: Jeff Anderson [EMAIL PROTECTED]
To: Mike King - KM0T [EMAIL PROTECTED]; 'FlexRadio Mailing List'
FlexRadio@flex-radio.biz
Sent: Tuesday, September 26, 2006 1:00 AM
Subject: Re: [Flexradio] Poor sideband suppression
Hi Mike,
Thanks
]
Date: Mon, 25 Sep 2006 11:22:16 -0700 (PDT)
To: [EMAIL PROTECTED], [EMAIL PROTECTED], flexradio@flex-radio.biz
Subject: Re: [Flexradio] Poor sideband suppression
Hi Gerald,
I don't think Jon's problem is one of TX Image
Rejection. We nulled it down at least 70 dB using the
procedure
Willi Reppel wrote:
Jeff,
One possible cure to avoid said jiggling and twisting of the plugs is to
drill larger holes into the backplate of the SDR1000 enclosure. The
relatively small holes may prevent certain types of male plugs to reach the
bottom of the female connectors. Gold-plated plugs
PROTECTED]
Cc: Jeff Anderson [EMAIL PROTECTED]; Mike King - KM0T
[EMAIL PROTECTED]; 'FlexRadio Mailing List' FlexRadio@flex-radio.biz
Sent: Tuesday, September 26, 2006 3:33 PM
Subject: Re: [Flexradio] Poor sideband suppression
Willi Reppel wrote:
Jeff,
One possible cure to avoid said jiggling
Rather than enlarge the hole, I used a
knife to shave the plastic on the plug end.
Mike - AA8K
Willi Reppel wrote:
Larry,
To the best of my knowledge, I cannot recall an offi-cial warning from
Flex.Radio against the use of gold-plated plugs. In contrary, these were
praised many times
Mike,
Good suggestion, but less useful for those who use gold-plated plugs in
solid brass.
Willi
- Original Message -
From: Mike Naruta [EMAIL PROTECTED]
To: 'FlexRadio Mailing List' FlexRadio@flex-radio.biz
Sent: Tuesday, September 26, 2006 6:07 PM
Subject: Re: [Flexradio] Poor
Here is an update on the poor sideband suppression from my SDR-1000.
It is putting significant energy out on the wrong sideband, visible in
the panadapter of a nearby fellow Flexer and audible by not so nearby
hams listening on the opposite sideband.
Yesterday I took the radio over to Jeff,
There is a procedure for Transmit Image Rejection management on the bottom of
page 90 of the manual. It worked for me but I'm using a Delta 44. The section
was rewritten by Eric but not published yet. Just use another trusted receiver,
tune it to the same frequency but the apposite side band
Hi Gerald,
I don't think Jon's problem is one of TX Image
Rejection. We nulled it down at least 70 dB using the
procedure in the manual. But we're still seeing
grunge on the opposite sideband. If I listen to that
sideband on another receiver, it doesn't sound like a
clear voice (as I would
] [mailto:[EMAIL PROTECTED]
radio.biz] On Behalf Of Jimmy Jones
Sent: Sunday, September 24, 2006 10:32 AM
To: flexradio@flex-radio.biz
Subject: Re: [Flexradio] Poor sideband suppression
One more thing. The output from the Firebox measures about 1.98V
during the audio TEST, nothing like
Sent: Monday, September 25, 2006 1:22 PM
Subject: Re: [Flexradio] Poor sideband suppression
Hi Gerald,
I don't think Jon's problem is one of TX Image
Rejection. We nulled it down at least 70 dB using the
procedure in the manual. But we're still seeing
grunge on the opposite sideband
-radio.biz
Sent: Monday, September 25, 2006 1:22 PM
Subject: Re: [Flexradio] Poor sideband suppression
Hi Gerald,
I don't think Jon's problem is one of TX Image
Rejection. We nulled it down at least 70 dB using the
procedure in the manual. But we're still seeing
grunge on the opposite
Mailing List'
Subject: Re: [Flexradio] Poor sideband suppression
Hi guys, this may or may not be a solution, and I know it has been beaten to
death...but I too experienced this same thing over the weekend while I was
helping a fellow with his SDR-1000.
He brought his system over and we
:[EMAIL PROTECTED] On Behalf Of Mike King - KM0T
Sent: Monday, September 25, 2006 4:10 PM
To: 'FlexRadio Mailing List'
Subject: Re: [Flexradio] Poor sideband suppression
Hi guys, this may or may not be a solution, and I know it has been beaten to
death...but I too experienced this same thing over
: Re: [Flexradio] Poor sideband suppression
Hi guys, this may or may not be a solution, and I know it has been beaten
to
death...but I too experienced this same thing over the weekend while I was
helping a fellow with his SDR-1000.
He brought his system over and we got it all set up. Going
I've had this problem several times and the issue has always been cable
connection seating or cables in the wrong jack on the firebox.
Looking from front to back (on the Firebox) my cable connectors or (left
to right)
On the top - Grey,Skip/NC,Grey and on the bottom - Red, Skip/NC, Red
I've
Soon as my warranty runs out, I plan to hard wire mine.
On 9/24/06, Jimmy Jones [EMAIL PROTECTED] wrote:
I've had this problem several times and the issue has always been cable
connection seating or cables in the wrong jack on the firebox.
Looking from front to back (on the Firebox) my cable
PROTECTED] On Behalf Of A.R.S. - W5AMI
Sent: Sunday, September 24, 2006 9:46 AM
To: Jimmy Jones
Cc: flexradio@flex-radio.biz
Subject: Re: [Flexradio] Poor sideband suppression
Soon as my warranty runs out, I plan to hard wire mine.
On 9/24/06, Jimmy Jones [EMAIL PROTECTED] wrote:
I've had
Cables or operator error was my guess. I've checked and rechecked the
cables. I've also swapped cables to no avail. I'll do all of this
again today.
Thanks,
Jon
On Sep 24, 2006, at 6:22 AM, Jimmy Jones wrote:
I've had this problem several times and the issue has always been cable
One more thing. The output from the Firebox measures about 1.98V
during the audio TEST, nothing like the 6.93 hardwired into the set-up
form.
I can remember doing this measurement and getting nearly the same
results as you have.
I can't remember what the answer was but I think you are ok there.
I'm getting poor opposite sideband suppression.Another Flex owner,
Jeff, K6JCA, took a snapshot of my spectrum off the air and there is a
significant hump on the opposite sideband. Other listeners have heard
the opposite sideband. It's not DSB. It's maybe 30 dB down. The TX
image
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