Date   

Re: Reception on Grundig G3 NOT Amazingly Improved with new 80 Ft Longwire Antenna

Graeme Zimmer <gzimmer@...>
 

I have an Antenna Tuner - an MFJ 16010 which I used years ago but it does nothing to stop that 50,000 watt 680 Hz blowtorch interference on the Shortwave Bands with the 80 Ft Antenna.
http://www.mfjenterprises.com/support.php?productid=MFJ-16010

The MFJ-16010 is configured as a low-pass filter, so it is probably not ideal for eliminating BC overload.

Do you have a good earth ??? Any ATU can't do much without an earth.

.......... Zim


Re: Reception on Grundig G3 NOT Amazingly Improved with new 80 Ft Longwire Antenna

jerry_popiel
 

--- In ultralightdx@..., Graeme Zimmer <gzimmer@...> wrote:

> The only way to reduce the Shortwave over-driving was to wrap the
Antenna Jumper around the Radio instead of clipping it to the Aerial,
then it wasn't so bad.

- As Jay said, use the antenna input, that is what it is there for.
Connection direct to the whip is far too sensitive.

- Use the attenuator switch, or wire up a simple potentiometer as a
variable attenuator.

- If images and breakthrough are still a problem, hook up a simple
antenna tuner.


.................... Zim
Thanks for the great comments guys. One of my local experts here advised me that this is a classic case of "Front End Overload" which he says is experienced with the cheaper radios. I have an Antenna Tuner - an MFJ 16010 which I used years ago but it does nothing to stop that 50,000 watt 680 Hz blowtorch interference on the Shortwave Bands with the 80 Ft Antenna. I will wire up a jack to the Antenna Input and see what happens. Thanks.


Re: Reception on Grundig G3 NOT Amazingly Improved with new 80 Ft Longwire Antenna

Graeme Zimmer <gzimmer@...>
 

The only way to reduce the Shortwave over-driving was to wrap the
Antenna Jumper around the Radio instead of clipping it to the Aerial, then it wasn't so bad.

- As Jay said, use the antenna input, that is what it is there for. Connection direct to the whip is far too sensitive.

- Use the attenuator switch, or wire up a simple potentiometer as a variable attenuator.

- If images and breakthrough are still a problem, hook up a simple antenna tuner.


.................... Zim


Re: Reception on Grundig G3 NOT Amazingly Improved with new 80 Ft Longwire Antenna

Jay Heyl
 

On Sat, Jul 9, 2011 at 14:25, Jerry Popiel <jerry_popiel@...> wrote:


Well after DXing late last night I am dissappointed. The Antenna seems to be way too strong!!  One local 50.000 watt station here was overriding ALL the Shortwave Bands. AM reception wasn't as bad, in fact its better, but even in the AM band that 50000 watt Station at 680 Hz is showing up. The only way to reduce the Shortwave overdriving was to wrap the Antenna Jumper around the Radio instead of clipping it to the Aerial, then it wasn't so bad.

I would suggest using the antenna input on the radio rather than clipping it to the whip. The whip antenna is typically amplified, which is obviously not what you want here.  

It doesn't appear the G3 has any adjustable gain aside from the DX/Local switch. That limits what you can do with the radio to tame that local flamethrower. About the only other option is to get a high-pass filter designed to block out the MW frequencies for when you're trying to listen to SW.

  -- Jay


Re: Reception on Grundig G3 NOT Amazingly Improved with new 80 Ft Longwire Antenna

Ken Kizer
 

Jerry Popiel writes...

Well after DXing late last night I am dissappointed. The Antenna seems to be way too strong!!  One local 50.000 watt station here was overriding ALL the Shortwave Bands. AM reception wasn't as bad, in fact its better, but even in the AM band that 50000 watt Station at 680 Hz is showing up. The only way to reduce the Shortwave overdriving was to wrap the Antenna Jumper around the Radio instead of clipping it to the Aerial, then it wasn't so bad.
 
Is there a way to fix this?  Seems like such a waste after all the work it took to put up the 80 foot Antenna.
I had to put two of the adjustable (discontinued) Radio Shack FM
attenuators in serial connection between my 150' (AM) antenna and most
of my receivers. The only one that doesn't complain about full signal
is the Drake R8. Hi-fi component tuners freak completely out (strong
station images up and down the dial).

Ken


Re: Reception on Grundig G3 NOT Amazingly Improved with new 80 Ft Longwire Antenna

Michael <michael.setaazul@...>
 

Not surprising, Jerry : total overload! Take care not to fry the front-end.
You could try a trap circuit between the longwire and the receiver
to null out the 680kHz local to some degree.

Michael UK

----- Original Message -----------------------------------------------------

From: Jerry Popiel
To: ultralightdx@...
Sent: 09 July 2011 22:25

Subject: [ultralightdx] Re: Reception on Grundig G3 NOT Amazingly Improved with new 80 Ft Longwire
Antenna

Well after DXing late last night I am dissappointed. The Antenna seems to be way too strong!! One
local 50.000 watt station here was overriding ALL the Shortwave Bands. AM reception wasn't as bad,
in fact its better, but even in the AM band that 50000 watt Station at 680 Hz is showing up. The
only way to reduce the Shortwave overdriving was to wrap the Antenna Jumper around the Radio instead
of clipping it to the Aerial, then it wasn't so bad.

Is there a way to fix this? Seems like such a waste after all the work it took to put up the 80
foot Antenna.


Re: Reception on Grundig G3 NOT Amazingly Improved with new 80 Ft Longwire Antenna

jerry_popiel
 

Well after DXing late last night I am dissappointed. The Antenna seems to be way too strong!!  One local 50.000 watt station here was overriding ALL the Shortwave Bands. AM reception wasn't as bad, in fact its better, but even in the AM band that 50000 watt Station at 680 Hz is showing up. The only way to reduce the Shortwave overdriving was to wrap the Antenna Jumper around the Radio instead of clipping it to the Aerial, then it wasn't so bad.
 
Is there a way to fix this?  Seems like such a waste after all the work it took to put up the 80 foot Antenna.


Re: Sony SRF-T615 noise-cut

Brian Miller
 

I'm no tech expert on radios, but I believe it would be considered an attenuator not an RF modifier.

--- In ultralightdx@..., "greekandlatin" <greekandlatin@...> wrote:

Thank for the response. Is the noise-cut a kind of attenuator or rf modifier? Does it affect sensitivity?

Andy



--- In ultralightdx@..., "Jerry" <brianalexmiller@> wrote:


The noise-cut lowers interference but it doesn't eliminate it


--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

OK, thanks Brian. For listening to FM I almost always use my SRF-S84, anyway, which I've found to be just as selective as the aforementioned DSP radios, though not quite as sensitive.

I wonder if someone would mind explaining the "noise cut" feature on the t615 - what does it do?

Thanks again,
Andy


--- In ultralightdx@..., "Jerry" <brianalexmiller@> wrote:


Hi Andy,

I'll post some over the next couple hours as I have to leave for a bit after I post this.

The radio can be used in the case. The FM section is perfectly acceptable for moderate to strong locals, but I wouldn't count on it to pull in distant weak signals such as those from a college or high school station. Not the way a Tecsun DSP ultralight would anyway.

The MW DX capabilities of this radio are well documented in this group and elsewhere.

Brian

--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

Hi everyone,

I wonder if someone who owns a Sony SRF-T615 could post some pictures of the sides of the radio, i.e. the controls. I'm thinking about springing for one of these but I can't seem to find any detailed pictures of the controls. Also - is the radio able to be operated while in the case? One more thing - how does the SRF-T615 perform on FM?

Thanks,
Andy


Re: Sony SRF-T615 pictures

Brian Miller
 

It's plastic.

But I've dropped mine COUNTLESS times onto my hardwood floor and she's fine!

I must say though- when I first got mine I was a bit underwhelmed. In fact I had it for a month and a half or so before I posted some questions about it on this board.

I read the advice from others, notably Rob Ross, and gave it another try and it quickly became my favorite ULR for MWDX.

--- In ultralightdx@..., "greekandlatin" <greekandlatin@...> wrote:

Thank you, Brian, for posting the pictures. That gives me a much better idea of the controls. Is the casing metal or plastic? It certainly seems robust. I now have one coming from the ebay seller joynetcafe. Can't wait!

Best to all,
Andy


--- In ultralightdx@..., "Jerry" <brianalexmiller@> wrote:

Hey Andy and anyone else interested -

I snapped those photos and uploaded them to an album entitled SONY SRF-T615 in the Photos section of this message board.

Brian

--- In ultralightdx@..., "Jerry" <brianalexmiller@> wrote:


The noise-cut lowers interference but it doesn't eliminate it


--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

OK, thanks Brian. For listening to FM I almost always use my SRF-S84, anyway, which I've found to be just as selective as the aforementioned DSP radios, though not quite as sensitive.

I wonder if someone would mind explaining the "noise cut" feature on the t615 - what does it do?

Thanks again,
Andy


--- In ultralightdx@..., "Jerry" <brianalexmiller@> wrote:


Hi Andy,

I'll post some over the next couple hours as I have to leave for a bit after I post this.

The radio can be used in the case. The FM section is perfectly acceptable for moderate to strong locals, but I wouldn't count on it to pull in distant weak signals such as those from a college or high school station. Not the way a Tecsun DSP ultralight would anyway.

The MW DX capabilities of this radio are well documented in this group and elsewhere.

Brian

--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

Hi everyone,

I wonder if someone who owns a Sony SRF-T615 could post some pictures of the sides of the radio, i.e. the controls. I'm thinking about springing for one of these but I can't seem to find any detailed pictures of the controls. Also - is the radio able to be operated while in the case? One more thing - how does the SRF-T615 perform on FM?

Thanks,
Andy


Re: Sony SRF-T615 noise-cut

greekandlatin <greekandlatin@...>
 

Thank for the response. Is the noise-cut a kind of attenuator or rf modifier? Does it affect sensitivity?

Andy

--- In ultralightdx@..., "Jerry" <brianalexmiller@...> wrote:


The noise-cut lowers interference but it doesn't eliminate it


--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

OK, thanks Brian. For listening to FM I almost always use my SRF-S84, anyway, which I've found to be just as selective as the aforementioned DSP radios, though not quite as sensitive.

I wonder if someone would mind explaining the "noise cut" feature on the t615 - what does it do?

Thanks again,
Andy


--- In ultralightdx@..., "Jerry" <brianalexmiller@> wrote:


Hi Andy,

I'll post some over the next couple hours as I have to leave for a bit after I post this.

The radio can be used in the case. The FM section is perfectly acceptable for moderate to strong locals, but I wouldn't count on it to pull in distant weak signals such as those from a college or high school station. Not the way a Tecsun DSP ultralight would anyway.

The MW DX capabilities of this radio are well documented in this group and elsewhere.

Brian

--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

Hi everyone,

I wonder if someone who owns a Sony SRF-T615 could post some pictures of the sides of the radio, i.e. the controls. I'm thinking about springing for one of these but I can't seem to find any detailed pictures of the controls. Also - is the radio able to be operated while in the case? One more thing - how does the SRF-T615 perform on FM?

Thanks,
Andy


Re: Sony SRF-T615 pictures

greekandlatin <greekandlatin@...>
 

Thank you, Brian, for posting the pictures. That gives me a much better idea of the controls. Is the casing metal or plastic? It certainly seems robust. I now have one coming from the ebay seller joynetcafe. Can't wait!

Best to all,
Andy

--- In ultralightdx@..., "Jerry" <brianalexmiller@...> wrote:

Hey Andy and anyone else interested -

I snapped those photos and uploaded them to an album entitled SONY SRF-T615 in the Photos section of this message board.

Brian

--- In ultralightdx@..., "Jerry" <brianalexmiller@> wrote:


The noise-cut lowers interference but it doesn't eliminate it


--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

OK, thanks Brian. For listening to FM I almost always use my SRF-S84, anyway, which I've found to be just as selective as the aforementioned DSP radios, though not quite as sensitive.

I wonder if someone would mind explaining the "noise cut" feature on the t615 - what does it do?

Thanks again,
Andy


--- In ultralightdx@..., "Jerry" <brianalexmiller@> wrote:


Hi Andy,

I'll post some over the next couple hours as I have to leave for a bit after I post this.

The radio can be used in the case. The FM section is perfectly acceptable for moderate to strong locals, but I wouldn't count on it to pull in distant weak signals such as those from a college or high school station. Not the way a Tecsun DSP ultralight would anyway.

The MW DX capabilities of this radio are well documented in this group and elsewhere.

Brian

--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

Hi everyone,

I wonder if someone who owns a Sony SRF-T615 could post some pictures of the sides of the radio, i.e. the controls. I'm thinking about springing for one of these but I can't seem to find any detailed pictures of the controls. Also - is the radio able to be operated while in the case? One more thing - how does the SRF-T615 perform on FM?

Thanks,
Andy


Reception on Grundig G3 Amazingly Improved with new 80 Ft Longwire Antenna

jerry_popiel
 

Feels fantastic. After 2 months of planning and climbing on my House and Garage to install metal Poles with eyelets, I finally succeeded today in installing an 80 Foot Longwire Antenna from the front peak of my house to the end of my garage.I used an end fed RF Systems Magnetic Longwire Balun MLB. Gain and sensitivity on my G3 Ultralite Radio is amazingly improved. I can hardly wait to try out my Tecsun PL 380 Radio on it when it arrives hopfully next week. I have pictures if anyone can tell me how to post them.


Re: Sony SRF-T615 pictures

Jay Heyl
 

On Fri, Jul 8, 2011 at 10:28, greekandlatin <greekandlatin@...> wrote:
Hi everyone,

I wonder if someone who owns a Sony SRF-T615 could post some pictures of the sides of the radio, i.e. the controls.  I'm thinking about springing for one of these but I can't seem to find any detailed pictures of the controls.  Also - is the radio able to be operated while in the case?  One more thing - how does the SRF-T615 perform on FM?

In case it's not obvious from the photos Brian posted, the T615 "case" is very thin. It's little more than scratch protection. The only control not exposed is the noise cut switch and it is easily engaged directly through the case. The only reason you need to remove the case is to change the batteries.

  -- Jay 


Re: Sony SRF-T615 pictures

Brian Miller
 

Hey Andy and anyone else interested -

I snapped those photos and uploaded them to an album entitled SONY SRF-T615 in the Photos section of this message board.

Brian

--- In ultralightdx@..., "Jerry" <brianalexmiller@...> wrote:


The noise-cut lowers interference but it doesn't eliminate it


--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

OK, thanks Brian. For listening to FM I almost always use my SRF-S84, anyway, which I've found to be just as selective as the aforementioned DSP radios, though not quite as sensitive.

I wonder if someone would mind explaining the "noise cut" feature on the t615 - what does it do?

Thanks again,
Andy


--- In ultralightdx@..., "Jerry" <brianalexmiller@> wrote:


Hi Andy,

I'll post some over the next couple hours as I have to leave for a bit after I post this.

The radio can be used in the case. The FM section is perfectly acceptable for moderate to strong locals, but I wouldn't count on it to pull in distant weak signals such as those from a college or high school station. Not the way a Tecsun DSP ultralight would anyway.

The MW DX capabilities of this radio are well documented in this group and elsewhere.

Brian

--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

Hi everyone,

I wonder if someone who owns a Sony SRF-T615 could post some pictures of the sides of the radio, i.e. the controls. I'm thinking about springing for one of these but I can't seem to find any detailed pictures of the controls. Also - is the radio able to be operated while in the case? One more thing - how does the SRF-T615 perform on FM?

Thanks,
Andy


Re: Sony ICF-SW 7600 GR

maurits van driessche <mauritsvandriessche@...>
 

Thanks for the info Farmerik ,yes I know there is no matts info on the net about  Sony portables .I did this week a test on FM  ,Sony SW 77 and  -Grundig YB 400 .The Grundig is the winner ,it pick up nice stations outside Belgium  Sporadic Es  DX .
Most portables works best on shortwave ,the 2001D are also very good on MW
73,
Maurits
 

----- Original Message -----
From: farmerik
Sent: Friday, July 08, 2011 11:08 PM
Subject: [ultralightdx] Re: Sony ICF-SW 7600 GR

 

I don't know the specification from SONY, but I have the ICF-7600G and it is in the top 10% as far as sensitivity for portables on AM I would say. - FARMERIK

--- In ultralightdx@..., "maurits van driessche" wrote:
>
> Hi group
>
> Does anyone knows the sensitivity on MW from the Sony ICF-SW 7600GR
> Thanks in advance
> 73,
> Maurits Van Driessche
> Belgium
> http://dxbelgium.blogspot.com/
>
> Also on Facebook under my full name
>


Tropospheric Enhancement this Weekend, Eastern US

Brian Miller
 

The FM band is enjoying some nice enhancement here in SE lower Michigan.

According to the tropospheric ducting forecast at

http://www.dxinfocentre.com/tropo.html

The conditions look very favorable all over the eastern half of the continental US.

I live in suburban Detroit and am currently enjoying a nice signal from 91.1 WRUW in Cleveland Ohio on my Sony XDR-F1HD.

I checked and could tune it on my G8 but the Sony Tuner is connected to an antenna on my roof.

Brian

Berkley MI


Re: Sony ICF-SW 7600 GR

Rik
 

I don't know the specification from SONY, but I have the ICF-7600G and it is in the top 10% as far as sensitivity for portables on AM I would say. - FARMERIK

--- In ultralightdx@..., "maurits van driessche" <mauritsvandriessche@...> wrote:

Hi group

Does anyone knows the sensitivity on MW from the Sony ICF-SW 7600GR
Thanks in advance
73,
Maurits Van Driessche
Belgium
http://dxbelgium.blogspot.com/

Also on Facebook under my full name


Re: Sony SRF-T615 pictures

Brian Miller
 

The noise-cut lowers interference but it doesn't eliminate it

--- In ultralightdx@..., "greekandlatin" <greekandlatin@...> wrote:

OK, thanks Brian. For listening to FM I almost always use my SRF-S84, anyway, which I've found to be just as selective as the aforementioned DSP radios, though not quite as sensitive.

I wonder if someone would mind explaining the "noise cut" feature on the t615 - what does it do?

Thanks again,
Andy


--- In ultralightdx@..., "Jerry" <brianalexmiller@> wrote:


Hi Andy,

I'll post some over the next couple hours as I have to leave for a bit after I post this.

The radio can be used in the case. The FM section is perfectly acceptable for moderate to strong locals, but I wouldn't count on it to pull in distant weak signals such as those from a college or high school station. Not the way a Tecsun DSP ultralight would anyway.

The MW DX capabilities of this radio are well documented in this group and elsewhere.

Brian

--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

Hi everyone,

I wonder if someone who owns a Sony SRF-T615 could post some pictures of the sides of the radio, i.e. the controls. I'm thinking about springing for one of these but I can't seem to find any detailed pictures of the controls. Also - is the radio able to be operated while in the case? One more thing - how does the SRF-T615 perform on FM?

Thanks,
Andy


Re: Sony SRF-T615 pictures

greekandlatin <greekandlatin@...>
 

OK, thanks Brian. For listening to FM I almost always use my SRF-S84, anyway, which I've found to be just as selective as the aforementioned DSP radios, though not quite as sensitive.

I wonder if someone would mind explaining the "noise cut" feature on the t615 - what does it do?

Thanks again,
Andy

--- In ultralightdx@..., "Jerry" <brianalexmiller@...> wrote:


Hi Andy,

I'll post some over the next couple hours as I have to leave for a bit after I post this.

The radio can be used in the case. The FM section is perfectly acceptable for moderate to strong locals, but I wouldn't count on it to pull in distant weak signals such as those from a college or high school station. Not the way a Tecsun DSP ultralight would anyway.

The MW DX capabilities of this radio are well documented in this group and elsewhere.

Brian

--- In ultralightdx@..., "greekandlatin" <greekandlatin@> wrote:

Hi everyone,

I wonder if someone who owns a Sony SRF-T615 could post some pictures of the sides of the radio, i.e. the controls. I'm thinking about springing for one of these but I can't seem to find any detailed pictures of the controls. Also - is the radio able to be operated while in the case? One more thing - how does the SRF-T615 perform on FM?

Thanks,
Andy


Re: 8" Diameter FSL vs. 4' Sided PVC Air-core Loop Runoff

Gary DeBock
 

Hi Jerry,

All the antenna signal testing was done using inductive coupling,
during which a stock Tecsun PL-606 model was held about 6" in front of
the air-core loop coil, then about 6" in front of the FSL coil. The
optimum inductive coupling distance of 6" (for both loops) was
determined prior to the signal testing, and no direct wiring
connections were used to connect the radio to either of the antennas.

The relative-size photos (such as the one posted at
http://www.mediafire.com/i/?yr7grir83488ii3 ) do not reflect the
testing setup at all, since during the actual testing the air-core loop
and FSL were separated by about 70 feet outdoors (in my back yard) to
avoid any possible interaction. Large tuned passive loops (both
air-core and FSL) have the capability to project a signal boost over
astonishing distances (up to 25' in the case of the 9' sided air core
loop here), making it necessary to separate such antennas very far
apart for accurate testing results.

73, Gary

-----Original Message-----
From: Jerry Popiel <jerry_popiel@...>
To: ultralightdx <ultralightdx@...>
Sent: Fri, Jul 8, 2011 1:58 am
Subject: [ultralightdx] Re: 8" Diameter FSL vs. 4' Sided PVC Air-core
Loop Runoff

 
Gary, was the 8" Diameter FSL Inductively or directly coupled to the PL
606? I ask this since in one of the pictures it looks like one of those
big loops - the second one  is directly connected to the small Radio -
the PL 380. Or did I miss something.

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