Tecsun PL-600 Birdie


d4g7johnson
 

Sorry for that. I learned something new about a radio I have
owned for years (the DX-440 being double conversion). I just
assumed it was single because almost all double-conversion
radios list that on the case to help sell the radio. The 440
certainly does not have much image rejection when tuning LW.

--- In ultralightdx@..., "toptyp19" <toptyp19@...> wrote:




The DX-440/ATS-803 are dual conversion. Also, the Sony 2010 is
dual conversion. All exhibit the 455 kHz birdie syndrome though!
It can be a definite PITA!

Joe



--- In ultralightdx@..., "d4g7johnson" <d4g7johnson@> wrote:

I thought it was common for <$1000 radios to use 455KHZ
I.F. (even if they are dual conversion and have another
higher I.F. frequency). Then if there is I.F. leakage
back into the RF input stage you will get oscillation
at about 455KHZ. The Radio Shack DX-440 is an prime
example of this, made worse by being single-conversion.
I don't have a PL-600 to compare, but it sounds like the
exact same problem.


--- In ultralightdx@..., "Lasse No" <lasse.radio@> wrote:

I just got a PL-600 and while tuning it on the LW band I came across a severe birdie between 450-460 kHz. Is this what to expect from a cheap chineze radio? I'm not too happy with my radio, so I wonder if it could be one of those that QC missed...

I have a video that shows this: http://www.youtube.com/watch?v=q_23b2oyujE&feature=plcp

Regards

Lasse


Rik
 

Remember, my PL-600 does not have any birdie between 450 and 460. I dug out my old one, and it has no birdie there either. So there a two PL-600 radios without that problem. - FARMERIK

--- In ultralightdx@..., "Lasse No" <lasse.radio@...> wrote:

Thanks for all the info. Since it's quite strong, killing any normal reception between 450-460 I was bit concerned that the radio might have a serious fault. But as you all have pointed out, it seems quite normal for a cheap radio. I guess I have to live with that...

Regards

Lasse


Lasse
 

Thanks for all the info. Since it's quite strong, killing any normal reception between 450-460 I was bit concerned that the radio might have a serious fault. But as you all have pointed out, it seems quite normal for a cheap radio. I guess I have to live with that...

Regards

Lasse


Russ Edmunds <wb2bjh@...>
 


I don't consider it an issue. Here in North America there are a couple of Navigational beacons on 450 in the Caribbean - one of which I've heard a few times on a 2010 - but not much else.

Whatever frequency is used as an IF frequency would do the same thing.

Russ Edmunds
15 mi NNW of Philadelphia
Grid FN20id

FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'; Grundig G8
AM:  Modified Sony ICF 2010's barefoot


--- On Mon, 9/3/12, toptyp19 wrote:

From: toptyp19 <toptyp19@...>
Subject: [ultralightdx] Re: Tecsun PL-600 Birdie
To: ultralightdx@...
Date: Monday, September 3, 2012, 9:07 PM

 



The DX-440/ATS-803 are dual conversion. Also, the Sony 2010 is
dual conversion. All exhibit the 455 kHz birdie syndrome though!
It can be a definite PITA!

Joe

--- In ultralightdx@..., "d4g7johnson" wrote:
>
> I thought it was common for <$1000 radios to use 455KHZ
> I.F. (even if they are dual conversion and have another
> higher I.F. frequency). Then if there is I.F. leakage
> back into the RF input stage you will get oscillation
> at about 455KHZ. The Radio Shack DX-440 is an prime
> example of this, made worse by being single-conversion.
> I don't have a PL-600 to compare, but it sounds like the
> exact same problem.
>
>
> --- In ultralightdx@..., "Lasse No" wrote:
> >
> > I just got a PL-600 and while tuning it on the LW band I came across a severe birdie between 450-460 kHz. Is this what to expect from a cheap chineze radio? I'm not too happy with my radio, so I wonder if it could be one of those that QC missed...
> >
> > I have a video that shows this: http://www.youtube.com/watch?v=q_23b2oyujE&feature=plcp
> >
> > Regards
> >
> > Lasse
> >
>


ferrite61 <dxrx@...>
 

Most <$1000 radios have this problem... but its not really a problem. You are losing a total of 2 NDB's on 450kHz. The other nearest ones are 440kHz and 492kHz. As I posted earlier, you can use this to center the BFO by tuning 454 and 456kHz and adjusting the fine tuning wheel until the pitch is the same on both frequencies.

I really don't see this as make/break purchase.

Paul S. in CT

--- In ultralightdx@..., "d4g7johnson" <d4g7johnson@...> wrote:

I thought it was common for <$1000 radios to use 455KHZ
I.F. (even if they are dual conversion and have another
higher I.F. frequency). Then if there is I.F. leakage
back into the RF input stage you will get oscillation
at about 455KHZ. The Radio Shack DX-440 is an prime
example of this, made worse by being single-conversion.
I don't have a PL-600 to compare, but it sounds like the
exact same problem.


--- In ultralightdx@..., "Lasse No" <lasse.radio@> wrote:

I just got a PL-600 and while tuning it on the LW band I came across a severe birdie between 450-460 kHz. Is this what to expect from a cheap chineze radio? I'm not too happy with my radio, so I wonder if it could be one of those that QC missed...

I have a video that shows this: http://www.youtube.com/watch?v=q_23b2oyujE&feature=plcp

Regards

Lasse


Joe
 

The DX-440/ATS-803 are dual conversion. Also, the Sony 2010 is
dual conversion. All exhibit the 455 kHz birdie syndrome though!
It can be a definite PITA!

Joe

--- In ultralightdx@..., "d4g7johnson" <d4g7johnson@...> wrote:

I thought it was common for <$1000 radios to use 455KHZ
I.F. (even if they are dual conversion and have another
higher I.F. frequency). Then if there is I.F. leakage
back into the RF input stage you will get oscillation
at about 455KHZ. The Radio Shack DX-440 is an prime
example of this, made worse by being single-conversion.
I don't have a PL-600 to compare, but it sounds like the
exact same problem.


--- In ultralightdx@..., "Lasse No" <lasse.radio@> wrote:

I just got a PL-600 and while tuning it on the LW band I came across a severe birdie between 450-460 kHz. Is this what to expect from a cheap chineze radio? I'm not too happy with my radio, so I wonder if it could be one of those that QC missed...

I have a video that shows this: http://www.youtube.com/watch?v=q_23b2oyujE&feature=plcp

Regards

Lasse


d4g7johnson
 

I thought it was common for <$1000 radios to use 455KHZ
I.F. (even if they are dual conversion and have another
higher I.F. frequency). Then if there is I.F. leakage
back into the RF input stage you will get oscillation
at about 455KHZ. The Radio Shack DX-440 is an prime
example of this, made worse by being single-conversion.
I don't have a PL-600 to compare, but it sounds like the
exact same problem.

--- In ultralightdx@..., "Lasse No" <lasse.radio@...> wrote:

I just got a PL-600 and while tuning it on the LW band I came across a severe birdie between 450-460 kHz. Is this what to expect from a cheap chineze radio? I'm not too happy with my radio, so I wonder if it could be one of those that QC missed...

I have a video that shows this: http://www.youtube.com/watch?v=q_23b2oyujE&feature=plcp

Regards

Lasse


Lasse
 

Only a few NDB's, which I can take with another receiver, so not a great problem, but still it should not be there, not that strong anyway....

Regards

Lasse

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

Can't think of anything else, but I am certainly no expert. Being a common radio IF which for years most radios could not tune, it seems unlikely 455 kHz. is used for broadcasts, so at least the birdie is in a good spot. - FARMERIK


Rik
 

Can't think of anything else, but I am certainly no expert. Being a common radio IF which for years most radios could not tune, it seems unlikely 455 kHz. is used for broadcasts, so at least the birdie is in a good spot. - FARMERIK

--- In ultralightdx@..., "Lasse No" <lasse.radio@...> wrote:

Nope, no other rx or anything else that could generate that. It's a strong birdie, tops the scale.

Regards

Lasse

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

That eliminates that. Are you running any radios with a 455 kHz. IF frequency at the same time? - FARMERIK


Lasse
 

Nope, no other rx or anything else that could generate that. It's a strong birdie, tops the scale.

Regards

Lasse

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

That eliminates that. Are you running any radios with a 455 kHz. IF frequency at the same time? - FARMERIK


Rik
 

That eliminates that. Are you running any radios with a 455 kHz. IF frequency at the same time? - FARMERIK

--- In ultralightdx@..., "Lasse No" <lasse.radio@...> wrote:

I have it both 5 inch from my computer and 20 miles out in the wilderness with no nearby gadget that can cause it, so it's definetly a birdie, not RFI.

Regards

Lasse

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

I have strong interference at 444kHz. UNTIL I move away from all computers on my PL-600. Once I do that it is clear past 460 kHz. - FARMERIK


Lasse
 

I have it both 5 inch from my computer and 20 miles out in the wilderness with no nearby gadget that can cause it, so it's definetly a birdie, not RFI.

Regards

Lasse

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

I have strong interference at 444kHz. UNTIL I move away from all computers on my PL-600. Once I do that it is clear past 460 kHz. - FARMERIK


Rik
 

I have strong interference at 444kHz. UNTIL I move away from all computers on my PL-600. Once I do that it is clear past 460 kHz. - FARMERIK

--- In ultralightdx@..., "ferrite61" <dxrx@...> wrote:

Well, you could put the radio into SSB mode and tune to 454kHz and 456kHz and check the pitch between te two. Adjusting the "Fine tuning" until the pitch is the same will help tune the radio in SSB mode. I do this on my Grundig G5.

Paul S. in CT

--- In ultralightdx@..., "Lasse No" <lasse.radio@> wrote:

I just got a PL-600 and while tuning it on the LW band I came across a severe birdie between 450-460 kHz. Is this what to expect from a cheap chineze radio? I'm not too happy with my radio, so I wonder if it could be one of those that QC missed...

I have a video that shows this: http://www.youtube.com/watch?v=q_23b2oyujE&feature=plcp

Regards

Lasse


Lasse
 

The birdie is approx at 454.8 kHz. I't quite annoying since all signals is lost between 450-460 due to this birdie. Is this normal for a cheap reciever (PL-600) to have such a strong birdie, or is there some fault in my reciever? Does anyone else have this error? If not, I might send it back to get it fixed.....

Regards

Lasse

--- In ultralightdx@..., "ferrite61" <dxrx@...> wrote:

Well, you could put the radio into SSB mode and tune to 454kHz and 456kHz and check the pitch between te two. Adjusting the "Fine tuning" until the pitch is the same will help tune the radio in SSB mode. I do this on my Grundig G5.

Paul S. in CT


ferrite61 <dxrx@...>
 

Well, you could put the radio into SSB mode and tune to 454kHz and 456kHz and check the pitch between te two. Adjusting the "Fine tuning" until the pitch is the same will help tune the radio in SSB mode. I do this on my Grundig G5.

Paul S. in CT

--- In ultralightdx@..., "Lasse No" <lasse.radio@...> wrote:

I just got a PL-600 and while tuning it on the LW band I came across a severe birdie between 450-460 kHz. Is this what to expect from a cheap chineze radio? I'm not too happy with my radio, so I wonder if it could be one of those that QC missed...

I have a video that shows this: http://www.youtube.com/watch?v=q_23b2oyujE&feature=plcp

Regards

Lasse


Lasse
 

I just got a PL-600 and while tuning it on the LW band I came across a severe birdie between 450-460 kHz. Is this what to expect from a cheap chineze radio? I'm not too happy with my radio, so I wonder if it could be one of those that QC missed...

I have a video that shows this: http://www.youtube.com/watch?v=q_23b2oyujE&feature=plcp

Regards

Lasse