The designer(also the main engineer of DE1103 & Grundig SAT800) now ask
advise of the receiver function from BCLer, the DE1108 will be the
high-end receiver of DE 110X series, it comes with a large dot matrix
LCD display(128*64) two way speaker system, MP3 recorder, AM sync
detector, SSB, dual conversion, the reference basis is SAT700, it
should has better performance than sony 2001D, 7600G, SW77 even SAT700,
the outline dimensions will be large than SAT700,pls post your thougts
here, I will take the message to the design, thank you!

news:1107187867.764998.76470@f14g2000cwb.googlegroups.com...

OK, here are a few thoughts on features I would like to see on the DE1108
portable:

1. Digital readout to a finer resolution than the Sony 2001D. A readout of
0.01 kHz would be very nice.

2. A passband tuning control (PBT) such as the Eton E1/Grundig Sat900 will
have, useful to at least +/- 2 kHz range. If passband tuning cannot be
included, then the AM synch detector should be a SELECTABLE SIDEBAND type,
as with the Sony's. Ideally, the new Degen would have both of these
features.

3. Sensitivity at least as good as the DE1103, which is a useful portable
here on the West Coast of the USA where signals are weaker.

4. A comfortable, large tuning knob, without audio "chuffing" (muting) when
tuning. The tuning knob on the DE1103 was a step in the right direction,
except it couldn't be very big due to the small size of the radio itself.

Guy Atkins
Puyallup, WA USA

128 x 64 dots?  Not large
    I'd like a spectrum display, that is too small for effectiveness.

    I heard the interview on local radio with the Eton manager and wonder
if it is to be too much for what it is, sw and sat radio, etc.   Seems too
much.

Hello,

The radio should offer:

Dual or triple conversion with no less than excellent front-end
selectivity.

Full coverage from at least 100 kHz to 30000 kHz AM (no gaps), 76-108
MHz FM, and possibly simple air band reception (118-137 Mhz).

4 or 6 rechargeable-NiMH "D"-cell operation with MANUAL switch on back
to choose AC or Battery operation (so that AC Adapter need not be
unplugged when on battery power).

Synchronous-selectable sideband reception is a MUST. Should be designed
at least as well as that on the Grundig Satellit 800. Full passband
tuning would be even better. Lock must be held as well as on AR7030
model and must automatically turn off when tuning and then re-lock when
station is selected.

A good notch filter (with at least 50 dB  depth) with range of 0.1 - 5
kHz.

At least 3 IF filters (bandwidths) (preferably 4) of 2.2 kHz, 4 kHz, 6
kHz (and possibly 1 kHz for data/CW); operation of these filters should
be cascaded so that inexpensive ceramic filters will give much better
performance than usual. (6 filter bandwidths would be ideal.) All shape
factors should be less than 1:2.

All parameters should be fully adjustable independently in all modes of
reception (except FM and the digital modes).

At least 200 memories. Tuning via knob (no "chugging" or muting),
"slew" buttons (5 kHz on SW, 9/10 kHz on MW, 9 kHz on LW, and 100 Mhz
on FM). Signal-scan automatic tuning. Memory scanning. Automatic memory
sorting. Automatic station setup (as on Sangean models) for AM and FM
memories.

Remote control operation possible with a CORDED detachable remote
control (at least 6 feet in length or adaptable to an extension cord if
user desires).

Dial illumination via LEDs, perhaps color-switchable (Red, Blue,
Green).

Dial light scheme similar to Grundig Satellit 800. (Always on or always
off with AC power, on for 15 seconds with any button push when using
battery power, or always off with batteries, as desired by user.)

Line outputs for external speaker(s) and stereo system. Excellent sound
quality is a must. Independent tone controls (Treble and Bass) should
be incorporated. Internal mono speaker of high quality is preferable to
mediocre stereo speakers.

At least two external antenna inputs for AM/SW (high and low impedence)
as well as an FM antenna input.

Built-in antennas should be: a LONG (possibly detachable) whip (PLUS a
shorter whip possibly optionally offered for travel); a LONG (at least
130 mm) internal ferrite antenna for MW and LW. External antennas to
override internal ones.

IBOC reception (AM & FM) for the US. Canadian DAB. (Possibly European
DAB.) Self-contained DRM (or a 12 kHz IF output to connect to a
DRM-equipped computer).

Clocks should be RADIO-CONTROLLED (and operated independently from
radio and powered via 2 AA or AAA batteries). Two times zones should be
available, one of which should be UTC. Local time should be adjustable
for daylight-savings time (via radio control) if required; UTC should
NOT be affected by DST change. One of the clocks (including seconds)
should ALWAYS be visible, radio on or off.

No LEDs (except for dial illumination and possibly button
illumination). Properly calibrated digital bar graph S-meter of at
least 12 segments.

A high-quality plastic cabinet or, preferably, a light-weight metal
(aluminum or magnesium) cabinet.

ALL internal components to be of TOP-QUALITY (formerly known as
MIL-spec).

Excellent sensitivity; a 3 or 4 step attenuator (or adjustable RF-gain
control) should be incorporated.

All other specifications to be of Drake R8B/AOR AR7030 caliber,
especially blocking, ultimate rejection, image rejection, and, most
important, dynamic range. Excellent sensitivity (a 3 or 4 step
attenuator would be of help).

A carrying case (nylon or leather) should be optionally offered; this
should be able to carry AC adapter, batteries, and any other options,
as well as fully protecting the radio.

Servicing is important. All service information should be made
available on line.

Guy Atkins has made some important suggestions; his suggestions should
be incorporated also.

A tall order? Yes. A "perfect" radio? Almost. There has never been
anything like it! What should this radio sell for? I would pay $1000 or
more for such a radio; could it be manufactured in China for $700?
Since this is to be your top-of-the-line radio, it should be designed
and made as perfectly as possible.

You make it, I'll buy it!

Joe

One thing I have long waited for -- a radio with USB flash drive support.
It would be great to record off the radio with different quality bit rates
(low to high) and transfer the files to my pc for CD archiving or vise versa
for playback on the radio.

news:1107187867.764998.76470@f14g2000cwb.googlegroups.com...

news:1107199374.348568.13470@c13g2000cwb.googlegroups.com...
[super radio specs snipped for convenience of replying]

Shoot, I feel like paying just to read your specs.
I want *that* radio!!!

LW2,
.
Using the Sony ICF-2010 as a 'standard and
a Grundig Satellit 800 M as a Reference:
.
*  DRM = Digital Radio Mondiale Built-in DRM Signal Processor.
.
*  Radio Data System {RDS} Information Display
.
*  AM SYNC with Selectable SSB
-  Dual Side Band AM-Sync = 6 kHz
-  Selected USB/LSB Single Side Band AM-Sync = 3.4 kHz
.
*  Four AM Shortwave IF Band Widths
-  DRM Extra-Wide 12 kHz
-  AM Normal 6 kHz {AM Sync}
-  DXing Narrow 3.4 kHz {AM-Sync Selectable SSB}
-  SSB 2.4 kHz
.
*  Two FM IF Band Widths
-  Stereo/Local FM Normal = 210 kHz Wide
-  Mono/DX FM Distance = 130 kHz Narrow
.
*  RF Signal Input Control Three Position :
-  BOOST = Built-in 10 dB Pre-Amplifier
for the Whip and Ferrite Bar Antennas.
-  DX = Normal
-  LOCAL = Shortwave Only 2-30 MHz
Band Pass Filter with -20dB Attenuation
for both the AM/MW Band and FM Band.
.
*  Large Tuning Knob and Up & Down Tuning Buttons
with about 240 to 360 Memories.
.
*  Dual Tuning Steps: {Fast and Fine}
-  FM = 200 & 20 kHz
-  AM = 10 & 1 kHz {AM-BCB = 9/10}
-  SSB = 1 kHz & 100 Hz
.
Separate Antenna Inputs :
-  FM "F" / PAL Connector
-  AM/MW and Shortwave
- - HI-Z Dual Terminals {A&G}
- - LO-Z Jack SO-239
.
*  Speakers Three (2:1) for FM Stereo
-  One Rear Facing Bass {4.5" Sub-Woofer}
-  Two = Left and Right Front {3" Stereo}
-  Audio Output Selector Switch:
- - Mono Talk & News {Voice} Front Two
- - Mono Music all three speakers
- - FM Stereo - HiFi (2:1)
NOTE - Sort of like the Grundig Satellit 2400 Dual
Speakers put the Controls in the Center and the
Speakers on the the Left and Right Front Sides.
http://www.dr-boesch.ch/radio/grundig-sat2400.htm
.
*  Built-in "D" Size Rechargable Batteries with an
'external' AC>DC Power Adapter / Battery Charger.
Auto/Car DC>DC Power Adapter / Battery Charger.
.
*  The Right "Size" - About the Size of a Panasonic
RF-2600 'portable' AM/FM Shortwave Radio :
NOTE - Look at the Lay out of the Controls
and the Big Main Tuning Knob.
http://www.dxing.com/rx/rf799.htm
-  13.5" W
-  9.3" H
-  4.6" D
-  Seven Pounds (7 Lbs.)
.
well thats my double-nickels worth ~ RHF
 .
 .

leowood2...@msn.com schrieb:

Some points I can think of offhand:
* Use good quality IF filters, i.e. 6-element ceramics or such for AM.
  (If these should not be available, get inventive.) I'd combine these
  with a wider tail filter. I guess DSP usage is not an option? Some
  care when applying the 1st IF crystal filters may not hurt, to ensure
  good image rejection (as well as intermodulation characteristics). FM
  should use 3 cascaded filters with a medium bandwidth to match the
  Satellit 700, with 3 gangs (tuned front-end circuits) recommended.
* With a two way speaker system, make sure sound is as good as possible
  with the concept, and that not only to Chinese ears. Audio engineering
  has sadly been frequently neglected in the last 10...15 years or so.
  If some kind of EQ circuit (for speaker operation only) is needed, so
  be it, the radio makers of yore also used such tricks. (There should
  be an additional tone control, tastes in sound differ after all.) Some
  research in terms of vibration suppression or loudspeaker building in
  general and such may be of help. Given the sound is right, a simple
  line-level 3.5 mm (stereo) input for amplifying purposes might be a
  nice touch.
* Get the internal shielding right, particularly with a non-negligible
  digital section.
* Oscillator pulling by lighting LEDs (DE1102 in SSB) and other such
  funky stuff better be ironed out, along with operating kinks. Plain
  ol' analog volume control and paged decimal presets please.
* Front end selectivity for the AM ranges should be one filter for LW,
  one for MW and then several (~ octave) for shortwave, maybe further
  varactor-tuned. (The '700 had an electronically tuned preselector,
  though it seems alignment of the thing from the factory wasn't always
  that great.) Those living near MW transmitters (rather common in the
  US) are likely to appreciate a highpass filter for shortwave.
* A big receiver should offer sufficient space for a big ferrite rod
  antenna, for good LW/MW (and I'd also suggest low SW up to ~2.5 MHz or
  so, where telescopic antennas tend to be inefficient) sensitivity and
  directionality. Something rotatable à la RF-2200 might be worth
  considering; the bigger a receiver is, the more tiresome rotating the
  whole thing becomes.
* I suggest at least two different frequency steps, better 3 - usual
  frequency grid for the band, 1 kHz and then something smallish (maybe
  100 Hz plus analog fine tuning, or <= 20 Hz without).
* Memory presets: With EEPROMs being rather inexpensive these days, a
  few hundreds with at least 8-digit name tags should be possible. But
  if MP3 recorder functionality (with commodity flash memory, I guess?)
  is already present, one could also use the associated storage. If this
  should be removable, a simple file format like CSV could enable easy
  presets interchanging and PC based updating. (This might even include
  firmware updates, which certainly are not a bad idea.) The MP3
  recording probably features adjustable sample rates, (average /
  variable, not only constant) bit rates and mono/stereo selection?
  (Shortwave recordings would probably require no more than 11025 Hz
  mono and thus a relatively low data rate, while FM stereo would best
  be recorded with 32000 Hz or 44100 Hz in stereo.)
* In spite of all possible complexity, the essential functions - tuning
  and frequency entering, tone control, basic preset saving and
  recalling - must remain simple and intuitive to use. If someone can
  figure these out without reading the manual, this is good. On a bigger
  set, placement of things like a tuning wheel requires some thought in
  order to avoid (arm related) fatigue during longer listening sessions.
* Any plans for DRM reception? (Provided some matching and not so power
  hungry ICs are already available. If not, a 12 kHz IF output derived
  from a suitable spot - maybe behind a 10...12 kHz filter normally
  improving ultimate rejection - is better than nothing. Reserving some
  space for an add-on DRM board may not hurt then.) What about RDS for
  FM?
* Dual balanced 1st mixers have been very similar in portables, and
  that for over 20 years now - how boring. Try some other circuit
  variants, maybe these give better results.
* For a receiver of this class, availability of servicing instructions
  is virtually a must.

I'm pretty sure build quality will not be an issue, given I see little
reason to complain about this even on the little DE105 (I recently
obtained a relabeled one). DEGEN certainly has the potential to become a
major player in the mobile entertainment market.

Stephan
--
Meine Andere Seite: http://stephan.win31.de/
PC#6: i440BX, 2xP3-500E, 704 MiB, 18+80 GB, R9k AGP 64 MiB, 110W
      This is a SCSI-inside, Legacy-plus, TCPA-free computer :)

In additional to the other features, how about a couple of wide IF
bandwidths?

        10 kHz for SW
        20 kHz for AM and some digital modes

These bandwidths would allow users to take advantage of the full
bandwidth that may be broadcast (5 kHz on SW and 10 kHz on BCB). It also
facilitates bringing out the IF for DRM or other digital modes.

craigm

the 1103 and 800 are from competing companies are you sure this is on
the level ?