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Old June 20th 06, 01:23 AM posted to rec.radio.shortwave
Jim Hackett
 
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Default Redsun RP-2100

I just got mine today. A definite improvement over the Grundig/Eton
S-350/BCL2000/3000 series of radios.
PLL tuner. (NO DRIFT)
50 memories
455 khz I.F. output for DRM (Why they made it a PAL connector, I'll never
know)
Separate bass and treble with an RF gain that actually works throughout it's
travel (unlike the S350)
Not only does the display light up, so does the buttons...
4 "D" cells or 4 "AA"'s

BIG TURN-OFF (It seems ALL radios have at least ONE)
NO NUMERIC KEYPAD!
Luckily the fast setting gets you through 10 MHz fairly quickly. There are 3
10 MHz segments...

How good is it? I dunno, I just now got it.

Anyone else get one? What do you think of it?


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Old June 20th 06, 02:35 AM posted to rec.radio.shortwave
David
 
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Default Redsun RP-2100

On Tue, 20 Jun 2006 00:23:52 GMT, "Jim Hackett"
wrote:

I just got mine today. A definite improvement over the Grundig/Eton
S-350/BCL2000/3000 series of radios.
PLL tuner. (NO DRIFT)
50 memories
455 khz I.F. output for DRM (Why they made it a PAL connector, I'll never
know)
Separate bass and treble with an RF gain that actually works throughout it's
travel (unlike the S350)
Not only does the display light up, so does the buttons...
4 "D" cells or 4 "AA"'s

BIG TURN-OFF (It seems ALL radios have at least ONE)
NO NUMERIC KEYPAD!
Luckily the fast setting gets you through 10 MHz fairly quickly. There are 3
10 MHz segments...

How good is it? I dunno, I just now got it.

Anyone else get one? What do you think of it?


http://i22.ebayimg.com/01/i/07/58/d3/59_1.JPG

  #3   Report Post  
Old June 20th 06, 04:37 PM posted to rec.radio.shortwave
Joe Analssandrini
 
Posts: n/a
Default Redsun RP-2100

Dear Jim,

Is this radio dual-conversion?

I thought that, for proper DRM reception, the output had to be 12 kHz.
Am I incorrect? What would you need to receive DRM with this receiver?

Best,

Joe

Jim Hackett wrote:
I just got mine today. A definite improvement over the Grundig/Eton
S-350/BCL2000/3000 series of radios.
PLL tuner. (NO DRIFT)
50 memories
455 khz I.F. output for DRM (Why they made it a PAL connector, I'll never
know)
Separate bass and treble with an RF gain that actually works throughout it's
travel (unlike the S350)
Not only does the display light up, so does the buttons...
4 "D" cells or 4 "AA"'s

BIG TURN-OFF (It seems ALL radios have at least ONE)
NO NUMERIC KEYPAD!
Luckily the fast setting gets you through 10 MHz fairly quickly. There are 3
10 MHz segments...

How good is it? I dunno, I just now got it.

Anyone else get one? What do you think of it?


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Old June 20th 06, 08:15 PM posted to rec.radio.shortwave
Jim Hackett
 
Posts: n/a
Default Redsun RP-2100

Yes Joe it IS double conversion. I ALSO thought you needed 12khz output for
DRM.
I also thought dual conversion virtually assured you wouldn't pick up
multiple images throughout the h.f. range...




"Joe Analssandrini" wrote in message
oups.com...
Dear Jim,

Is this radio dual-conversion?

I thought that, for proper DRM reception, the output had to be 12 kHz.
Am I incorrect? What would you need to receive DRM with this receiver?

Best,

Joe

Jim Hackett wrote:
I just got mine today. A definite improvement over the Grundig/Eton
S-350/BCL2000/3000 series of radios.
PLL tuner. (NO DRIFT)
50 memories
455 khz I.F. output for DRM (Why they made it a PAL connector, I'll

never
know)
Separate bass and treble with an RF gain that actually works throughout

it's
travel (unlike the S350)
Not only does the display light up, so does the buttons...
4 "D" cells or 4 "AA"'s

BIG TURN-OFF (It seems ALL radios have at least ONE)
NO NUMERIC KEYPAD!
Luckily the fast setting gets you through 10 MHz fairly quickly. There

are 3
10 MHz segments...

How good is it? I dunno, I just now got it.

Anyone else get one? What do you think of it?




  #5   Report Post  
Old June 20th 06, 09:03 PM posted to rec.radio.shortwave
Tom
 
Posts: n/a
Default Redsun RP-2100

Joe Analssandrini wrote:
Dear Jim,

Is this radio dual-conversion?

I thought that, for proper DRM reception, the output had to be 12 kHz.
Am I incorrect? What would you need to receive DRM with this receiver?

Best,

Joe

Jim Hackett wrote:
455 khz I.F. output for DRM (Why they made it a PAL connector, I'll never
know)


The 455 kHz IF output is a plus, not just for DRM but for any software
defined radio IF/demod. With software, you can demodulate AM/SSB/CW/FM
and digital modes, have incredible variable bandwidth, shiftable IF
filtering, noise reduction, improved AGC, spectrum display, etc.

You need a 12 kHz or so IF to do the above via a conventional computer
sound system and, consequently, a down converter between the 455kHz
output and the computer. I guess that would make it a triple-conversion
supehet receiver (if you don't count the A/D and D/A converters in the
computer sound system!).

Tom



  #6   Report Post  
Old June 20th 06, 09:05 PM posted to rec.radio.shortwave
John S.
 
Posts: n/a
Default Redsun RP-2100


Jim Hackett wrote:
Yes Joe it IS double conversion. I ALSO thought you needed 12khz output for
DRM.
I also thought dual conversion virtually assured you wouldn't pick up
multiple images throughout the h.f. range...


Although dual conversion on an inexpensive radio usually does not mean
immunity from images.






"Joe Analssandrini" wrote in message
oups.com...
Dear Jim,

Is this radio dual-conversion?

I thought that, for proper DRM reception, the output had to be 12 kHz.
Am I incorrect? What would you need to receive DRM with this receiver?

Best,

Joe

Jim Hackett wrote:
I just got mine today. A definite improvement over the Grundig/Eton
S-350/BCL2000/3000 series of radios.
PLL tuner. (NO DRIFT)
50 memories
455 khz I.F. output for DRM (Why they made it a PAL connector, I'll

never
know)
Separate bass and treble with an RF gain that actually works throughout

it's
travel (unlike the S350)
Not only does the display light up, so does the buttons...
4 "D" cells or 4 "AA"'s

BIG TURN-OFF (It seems ALL radios have at least ONE)
NO NUMERIC KEYPAD!
Luckily the fast setting gets you through 10 MHz fairly quickly. There

are 3
10 MHz segments...

How good is it? I dunno, I just now got it.

Anyone else get one? What do you think of it?



  #7   Report Post  
Old June 20th 06, 11:15 PM posted to rec.radio.shortwave
Jim Hackett
 
Posts: n/a
Default Redsun RP-2100

Turning the RF gain down helps considerably...
D'oh!


"John S." wrote in message
ups.com...

Jim Hackett wrote:
Yes Joe it IS double conversion. I ALSO thought you needed 12khz output

for
DRM.
I also thought dual conversion virtually assured you wouldn't pick up
multiple images throughout the h.f. range...


Although dual conversion on an inexpensive radio usually does not mean
immunity from images.






"Joe Analssandrini" wrote in message
oups.com...
Dear Jim,

Is this radio dual-conversion?

I thought that, for proper DRM reception, the output had to be 12 kHz.
Am I incorrect? What would you need to receive DRM with this receiver?

Best,

Joe

Jim Hackett wrote:
I just got mine today. A definite improvement over the Grundig/Eton
S-350/BCL2000/3000 series of radios.
PLL tuner. (NO DRIFT)
50 memories
455 khz I.F. output for DRM (Why they made it a PAL connector, I'll

never
know)
Separate bass and treble with an RF gain that actually works

throughout
it's
travel (unlike the S350)
Not only does the display light up, so does the buttons...
4 "D" cells or 4 "AA"'s

BIG TURN-OFF (It seems ALL radios have at least ONE)
NO NUMERIC KEYPAD!
Luckily the fast setting gets you through 10 MHz fairly quickly.

There
are 3
10 MHz segments...

How good is it? I dunno, I just now got it.

Anyone else get one? What do you think of it?




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Old June 21st 06, 02:44 AM posted to rec.radio.shortwave
RHF
 
Posts: n/a
Default Redsun RP-2100

JA - If Frequency 455 kHz with an IF Band Width of 12 kHz

DRM needs a 12 kHz IF Band Width Signal for processing.

IIRC - The IF Frequency can be anything that the
DRM Processor is set to woork with.

hope this helps ~ RHF
  #9   Report Post  
Old June 21st 06, 09:44 AM posted to rec.radio.shortwave
RHF
 
Posts: n/a
Default Redsun RP-2100

Smokey,

Gee Golly - I do not see 10 Memory Buttons - Doh ! ~ RHF

So... How Do they accomplish the Ten Memories per Band ?
-and- How Do you recall the Memories once stored ?

FWIW - Picture of the Redsun Export Model RP2000
http://www.redsunelect.com/UploadFiles/RP2000.jpg
Reportedly this is same Radio with English Lettering.
  #10   Report Post  
Old June 21st 06, 10:23 PM posted to rec.radio.shortwave
Joe Analssandrini
 
Posts: n/a
Default Redsun RP-2100

Dear Jim,

ARE you hearing images on this radio?

How many IF bandwidths does it have?

How does the tuning knob "feel?" (The one on the Grundig S350 is
hopeless.) Any "backlash?"

What kind of external antenna connector is on the radio?

Finally, did you buy yours from Lipyn's eBay shop? If not, how much did
you pay, if you don't mind my asking?

Would you tell me, having owned the set for several days, your
impressions of its construction quality?

I presume this set has no synchronous detection circuit. Am I correct?

I also presume that, with its large speaker, it has quite good audio
quality on FM as well as MW. Correct? (Can you compare its FM audio
quality to the GE Superadio, the S350 or Satellit 800?)

Sorry for all the questions, but I do appreciate your replies. The
radio looks interesting.

Best,

Joe

Jim Hackett wrote:

Yes Joe it IS double conversion. I ALSO thought you needed 12khz output for
DRM.
I also thought dual conversion virtually assured you wouldn't pick up
multiple images throughout the h.f. range...

"Joe Analssandrini" wrote in message
oups.com...
Dear Jim,

Is this radio dual-conversion?

I thought that, for proper DRM reception, the output had to be 12 kHz.
Am I incorrect? What would you need to receive DRM with this receiver?

Best,

Joe

Jim Hackett wrote:
I just got mine today. A definite improvement over the Grundig/Eton
S-350/BCL2000/3000 series of radios.
PLL tuner. (NO DRIFT)
50 memories
455 khz I.F. output for DRM (Why they made it a PAL connector, I'll

never
know)
Separate bass and treble with an RF gain that actually works throughout

it's
travel (unlike the S350)
Not only does the display light up, so does the buttons...
4 "D" cells or 4 "AA"'s

BIG TURN-OFF (It seems ALL radios have at least ONE)
NO NUMERIC KEYPAD!
Luckily the fast setting gets you through 10 MHz fairly quickly. There

are 3
10 MHz segments...

How good is it? I dunno, I just now got it.

Anyone else get one? What do you think of it?


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