I posted this message over in rec.radio.amateur.dx, but no one seems to have
any answers for me. It's perhaps a little off-topic, but since most of the
posts in these parts are, it'll fit right in. And at least here I'll get
some sort of response.

Even if it's political.

I'm just going to cut and paste:



I'm new to the hobby, so please bear with me.

I picked up a Gene Scott broadcast last night on MW at 1615 KHz. Here's the
info I found at his website:

http://www.drgenescott.com/swave.htm

THE CARIBBEAN BEACON
Anguilla, British West Indies
24 hours a day - 7 days a week

690 KHz AM

1610 KHz AM

I'm listening in Seattle, and I really don't think that I've DX'd the guy
all the way from the Caribbean. The signal isn't constant; it eventually
faded out just
like SW reception does. So my question is, just how did I hear this
broadcast? Scott uses satellites, but I imagine they're geo-synchronous and
so (I assume) the signal wouldn't fade. Is that true? Is retransmitting of
MW or FM band signals ever even done in the first place? And why did I
receive the signal at 1615 instead of 1610? Did I pick up a repeater of some
sort? I have more questions, but I think that from the ones I've just posed
that everyone can imagine what they are. Thanks in advance for your replies.

FWIW I'm using a Grundig S350, grounded, with a 75' random wire antenna.


And for rec.radio.shortwave, does anybody know of a URL that explains the
process by which SW trasmissions are rebroadcast via satellite? Obviously,
I've got more to learn about this.

Oh, and by the way...it's 0525 UTC and -someone- is back on that frequency
again. (I tried reception during the day, but got nothing.) I haven't yet
heard anything to indicate who it is, but I'm sure it's Scott.

Someone *could* be rebroadcasting a shortwave, satellite or other signal
on a MW transmitter that is not PLL and has drifted a bit.

Some folks think Gene Scott is like R. G. Stair -- HE'S EVERYWHERE! ;-)

There might be other explanations but a cheap rebroadcast is my only
guess. Perhaps someone else will have a better answer.

Al

==================

Honus wrote:

I posted this message over in rec.radio.amateur.dx, but no one seems to have
any answers for me. It's perhaps a little off-topic, but since most of the
posts in these parts are, it'll fit right in. And at least here I'll get
some sort of response.

Even if it's political.

I'm just going to cut and paste:



I'm new to the hobby, so please bear with me.

I picked up a Gene Scott broadcast last night on MW at 1615 KHz. Here's the
info I found at his website:

http://www.drgenescott.com/swave.htm

THE CARIBBEAN BEACON
Anguilla, British West Indies
24 hours a day - 7 days a week

690 KHz AM

1610 KHz AM

I'm listening in Seattle, and I really don't think that I've DX'd the guy
all the way from the Caribbean. The signal isn't constant; it eventually
faded out just
like SW reception does. So my question is, just how did I hear this
broadcast? Scott uses satellites, but I imagine they're geo-synchronous and
so (I assume) the signal wouldn't fade. Is that true? Is retransmitting of
MW or FM band signals ever even done in the first place? And why did I
receive the signal at 1615 instead of 1610? Did I pick up a repeater of some
sort? I have more questions, but I think that from the ones I've just posed
that everyone can imagine what they are. Thanks in advance for your replies.

FWIW I'm using a Grundig S350, grounded, with a 75' random wire antenna.


And for rec.radio.shortwave, does anybody know of a URL that explains the
process by which SW trasmissions are rebroadcast via satellite? Obviously,
I've got more to learn about this.

Oh, and by the way...it's 0525 UTC and -someone- is back on that frequency
again. (I tried reception during the day, but got nothing.) I haven't yet
heard anything to indicate who it is, but I'm sure it's Scott.

"Honus" wrote in message
...

[snip]



I'm new to the hobby, so please bear with me.

I picked up a Gene Scott broadcast last night on MW at 1615 KHz. Here's
the
info I found at his website:

http://www.drgenescott.com/swave.htm

THE CARIBBEAN BEACON
Anguilla, British West Indies
24 hours a day - 7 days a week

690 KHz AM

1610 KHz AM

I'm listening in Seattle, and I really don't think that I've DX'd the guy
all the way from the Caribbean. The signal isn't constant; it eventually
faded out just
like SW reception does. So my question is, just how did I hear this
broadcast?

Looks like a spurious response caused by your oscillator's third harmonic
and the radio's poor RF selectivity.

Assuming an IF frequency of 455 kHz, when the radio is tuned to 1615 the
local oscillator is running at 2070 kHz (1615 + 455).

The third harmonic of 2070 kHz is 6210 kHz.

With an IF of 455 kHz and an oscillator frequency of 6210 kHz, there will be
a response at both 6665 kHz (6210 + 455) and 5755 kHz (6210 - 455).

KAIJ carries Dr. Scott on 5755.

http://www.drgenescott.com/swave.htm



Scott uses satellites, but I imagine they're geo-synchronous and
so (I assume) the signal wouldn't fade. Is that true? Is retransmitting of
MW or FM band signals ever even done in the first place? And why did I
receive the signal at 1615 instead of 1610? Did I pick up a repeater of
some
sort? I have more questions, but I think that from the ones I've just
posed
that everyone can imagine what they are. Thanks in advance for your
replies.


You might try checking your radio's local oscillator output with another
radio. I'll bet it puts out a receivable signal at 6210 kHz as you tune
around 1615 kHz.



FWIW I'm using a Grundig S350, grounded, with a 75' random wire antenna.


And for rec.radio.shortwave, does anybody know of a URL that explains the

process by which SW trasmissions are rebroadcast via satellite? Obviously,
I've got more to learn about this.

Oh, and by the way...it's 0525 UTC and -someone- is back on that frequency
again. (I tried reception during the day, but got nothing.) I haven't yet
heard anything to indicate who it is, but I'm sure it's Scott.



What was he talking about? The Pyramids? Aliens? Demons?

Was he yelling at the hired hands again?

Frank Dresser

"Frank Dresser" wrote in message
...

snip

Looks like a spurious response caused by your oscillator's third harmonic
and the radio's poor RF selectivity.

Assuming an IF frequency of 455 kHz, when the radio is tuned to 1615 the
local oscillator is running at 2070 kHz (1615 + 455).

The third harmonic of 2070 kHz is 6210 kHz.

With an IF of 455 kHz and an oscillator frequency of 6210 kHz, there will
be
a response at both 6665 kHz (6210 + 455) and 5755 kHz (6210 - 455).

KAIJ carries Dr. Scott on 5755.

snip

I just told someone over in rec.radio.amateur.dx that I'm
ready to mail my Grundig back to China with a letter enclosed telling them
where they can send it from there. This whole shortwave/AM DX experience
has been extremely frustrating.

All I want to do is turn on my radio, spin the dial until I find something
interesting, look it up in my "Passport" book and have that be the end of
it. sigh Oh well. I might as well start wishing for world peace.

You might try checking your radio's local oscillator output with another
radio. I'll bet it puts out a receivable signal at 6210 kHz as you tune
around 1615 kHz.

The first part of that went clean over my head. Thanks for trying, though!
g

FWIW I'm using a Grundig S350, grounded, with a 75' random wire antenna.


And for rec.radio.shortwave, does anybody know of a URL that explains
the

process by which SW trasmissions are rebroadcast via satellite?
Obviously,
I've got more to learn about this.

I'm still looking for this one. Part of the fun of this, which I didn't
include in my rant above, is how I'm sharing this with my kids. I've got a
big map on the wall, and we stick pins in the places where broadcasts we've
received originated from. But as you all know, you can't always tell where a
signal is coming from what with relays and satellites, etc. I'll just
persevere. I'm going to enjoy this damned hobby if it kills me.

Oh, and by the way...it's 0525 UTC and -someone- is back on that
frequency
again. (I tried reception during the day, but got nothing.) I haven't
yet
heard anything to indicate who it is, but I'm sure it's Scott.



What was he talking about? The Pyramids? Aliens? Demons?

Was he yelling at the hired hands again?

No, I wasn't that lucky. It's good to have something to look forward to,
though.

Honus wrote:

"Frank Dresser" wrote in message
...

snip

Looks like a spurious response caused by your oscillator's third harmonic
and the radio's poor RF selectivity.

Assuming an IF frequency of 455 kHz, when the radio is tuned to 1615 the
local oscillator is running at 2070 kHz (1615 + 455).

The third harmonic of 2070 kHz is 6210 kHz.

With an IF of 455 kHz and an oscillator frequency of 6210 kHz, there will
be
a response at both 6665 kHz (6210 + 455) and 5755 kHz (6210 - 455).

KAIJ carries Dr. Scott on 5755.

snip

I just told someone over in rec.radio.amateur.dx that I'm
ready to mail my Grundig back to China with a letter enclosed telling them
where they can send it from there. This whole shortwave/AM DX experience
has been extremely frustrating.

All I want to do is turn on my radio, spin the dial until I find something
interesting, look it up in my "Passport" book and have that be the end of
it. sigh Oh well. I might as well start wishing for world peace.

You might try checking your radio's local oscillator output with another
radio. I'll bet it puts out a receivable signal at 6210 kHz as you tune
around 1615 kHz.

The first part of that went clean over my head. Thanks for trying, though!
g

FWIW I'm using a Grundig S350, grounded, with a 75' random wire antenna.


And for rec.radio.shortwave, does anybody know of a URL that explains
the

process by which SW trasmissions are rebroadcast via satellite?
Obviously,
I've got more to learn about this.

I'm still looking for this one. Part of the fun of this, which I didn't
include in my rant above, is how I'm sharing this with my kids. I've got a
big map on the wall, and we stick pins in the places where broadcasts we've
received originated from. But as you all know, you can't always tell where a
signal is coming from what with relays and satellites, etc. I'll just
persevere. I'm going to enjoy this damned hobby if it kills me.

It's a great hobby. Always something going on.

dxAce

I have a S350 and it's my "sitting on the back porch with a beer on a nice
night radio", but it's no DX machine. The S350 is a single conversion radio
and it suffers badly from images as a result.

"Honus" wrote in message
...

"Frank Dresser" wrote in message
...

snip

Looks like a spurious response caused by your oscillator's third
harmonic
and the radio's poor RF selectivity.

Assuming an IF frequency of 455 kHz, when the radio is tuned to 1615 the
local oscillator is running at 2070 kHz (1615 + 455).

The third harmonic of 2070 kHz is 6210 kHz.

With an IF of 455 kHz and an oscillator frequency of 6210 kHz, there
will
be
a response at both 6665 kHz (6210 + 455) and 5755 kHz (6210 - 455).

KAIJ carries Dr. Scott on 5755.

snip

I just told someone over in rec.radio.amateur.dx that I'm
ready to mail my Grundig back to China with a letter enclosed telling them
where they can send it from there. This whole shortwave/AM DX
experience
has been extremely frustrating.

All I want to do is turn on my radio, spin the dial until I find something
interesting, look it up in my "Passport" book and have that be the end of
it. sigh Oh well. I might as well start wishing for world peace.

You might try checking your radio's local oscillator output with another
radio. I'll bet it puts out a receivable signal at 6210 kHz as you tune
around 1615 kHz.

The first part of that went clean over my head. Thanks for trying, though!
g

FWIW I'm using a Grundig S350, grounded, with a 75' random wire
antenna.


And for rec.radio.shortwave, does anybody know of a URL that explains
the

process by which SW trasmissions are rebroadcast via satellite?
Obviously,
I've got more to learn about this.

I'm still looking for this one. Part of the fun of this, which I didn't
include in my rant above, is how I'm sharing this with my kids. I've got a
big map on the wall, and we stick pins in the places where broadcasts
we've
received originated from. But as you all know, you can't always tell where
a
signal is coming from what with relays and satellites, etc. I'll just
persevere. I'm going to enjoy this damned hobby if it kills me.

Oh, and by the way...it's 0525 UTC and -someone- is back on that
frequency
again. (I tried reception during the day, but got nothing.) I haven't
yet
heard anything to indicate who it is, but I'm sure it's Scott.



What was he talking about? The Pyramids? Aliens? Demons?

Was he yelling at the hired hands again?

No, I wasn't that lucky. It's good to have something to look forward to,
though.

"mike0219116" wrote in message
news:z3xUc.7289$ni.5199@okepread01...
I have a S350 and it's my "sitting on the back porch with a beer on a nice
night radio", but it's no DX machine. The S350 is a single conversion
radio
and it suffers badly from images as a result.


Just to pick nits, there were many single conversion radios which had decent
image rejection due to additional stages of RF amplification and tuned
circuits. The dual conversion approach became cheaper way to a high
performance radio sometime around 1950. However, multiconversion radios
will have an extra image for each conversion, not to mention conversion
oscillator fundamental and harmonic and IF harmonic birdies. These should
be well supressed, but it's entirely possible some schlockmeister will come
up with a really cheap multiconversion radio that's a total nightmare.

Frank Dresser

You're right. I guess when ever I get images on my S350 I just
automatically blame it on its single-conversion design mostly because I have
a cheap Tecsun that's double-conversion and much better at fighting off
images. Perhaps some of the image problems on the S350 can also be blamed
on its filters. They are extra-crappy.

"Frank Dresser" wrote in message
...

"mike0219116" wrote in message
news:z3xUc.7289$ni.5199@okepread01...
I have a S350 and it's my "sitting on the back porch with a beer on a
nice
night radio", but it's no DX machine. The S350 is a single conversion
radio
and it suffers badly from images as a result.


Just to pick nits, there were many single conversion radios which had
decent
image rejection due to additional stages of RF amplification and tuned
circuits. The dual conversion approach became cheaper way to a high
performance radio sometime around 1950. However, multiconversion radios
will have an extra image for each conversion, not to mention conversion
oscillator fundamental and harmonic and IF harmonic birdies. These should
be well supressed, but it's entirely possible some schlockmeister will
come
up with a really cheap multiconversion radio that's a total nightmare.

Frank Dresser

Honus wrote:

I'm going to enjoy this damned hobby if it kills me.

Hear, Hear!

There should be a Latin translation of that somewhere...






mike


--
__ __ __ __ __ __ __ __
/ /\ / /\ / /\ / /\ / /\ / /\ / /\ / /
/ /\ \/ /\ \/ /\ \/ /
/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/ \/_/

..let the cat out to reply..

©Densa International
'Think tanks cleaned cheap'

"m II" wrote in message
news:4_yUc.20547$jZ5.15839@clgrps13...
Honus wrote:

I'm going to enjoy this damned hobby if it kills me.

Hear, Hear!

There should be a Latin translation of that somewhere...

I've got the guys over in one of the latin language groups working on it.