This radio has been bought ca 2000? and here i re-write slighly just for reference in this site
Possibly the most expensive model of the series costing € 60 contrary to its cassette size dimensions (7 x 11x2.5) .
Included with it are :
Very small metallic colored buttons ( just only thin fingers should use it!)
- Real PLL synthesis . Step/Scan up and down and 30 memories . 5 kHz steps are used in SW 0.1 MHz in FM band
- 2 timers , including alarm sleep function ( steps of 10 minutes with max 90 mins )
- Light function lighting for 15 secs as standard
- Lock key locks all buttons on the front panel
- Hi - low tone switch on the left
- Case showing ‘world receiver’ and headphones ( earbuds)
- Antenna wire
- Handling bracket built in
- Instruction for use in ‘Chinglish’
IN the report there was comparison with other chibo radios , that
showed on ne of them was actually showing the exact frequency even it it
uses a quasi digital system . IN contrast to this , as the radio is
fully digital with PLL it shown the exact freq :
FM : 87,5 -108 ≤20 µV , 100 kHz steps and stereo when using headphones
MW: 521-1620
SW: 5950-15600 continuous in 5 KHz steps
-
A button is provided for selection between these SW band starting points :
7.1- 9.5 - 11.65 – 13.6 – 15.1 MHz
- Another button is provided
for changing between these three bands in carousel ( MW, SW and FM)
This radio has been checked for long time with the SONY ICF7600 D as
reference and shown contradictory results ( as in some cases the Sony
model outperformed the Kchibo and on other cases Kchibo outperformed
Sony).
Results from my measurements
- Very long time for changing between freqs : 1.1 sec. Step button operates also as scanning function
- Using most by thumb of the buttons produces high local oscillator noise coming into radio
- Frequency indications are now exact.
- And relatively good AGC operation.( he only with some AGC??) IN
case of cross-interferenced signals however there is a very high ripple
- Headphone cable affects as antenna
- FM sensitivity higher regarding to 979 without the mess of overloading.
- FM Selectivity Better than 979 but not as of 7100 . Relatively better than Sony
-FM stereo audio ( via ear buds) is very good . Level as of a
medium class stereo system
SW/AM Sensitivity: Better than 979 . Nearly same with R75 with
telescopic antenna unfolded and full preamplification( 20 db) . And
relatively same level with ICF 7600 D though in some cases 7600 was
better Also it is found that using wires more than 3 m overload the
radio.
- Earbuds: Seem typical quality stereo earbuds. About -2db than my Philips open ear buds with ? atter audio response
- AM/SW selectivity:
About 6-7 kHz . Much better than the 979 ( abt 15kHz ??) but less than
7600D ( it seems les than 4.7 kHz) . More on this in the pictures on
the end
. However as in result it produces pleasant audio . ON parallel
listening with Sony model earbud to earbud for a given freq. range
audio was in the middle .
- 3 VDC : Unkown problem with 3VDC from non stabilized adaptor showed locked all radio operations .
- Listening with its own speaker:
I found that in vacant freqs the inner oscillator circuit is heard.
NOw i never use its spaker , as i only use the Koss UR60 headphones for
the best audio.
Opening the cover : All ICs have their IDs clear and are posibly
replaceable
after a very lengthy usage:
1 . Suddenly , the antenna has been cut in half. This made the radio
possibly lose much of its sensitivity (?)on FM but the SW eficiency
is still very good : Using more than 3 m of wire it overloads itself
2. The audio in FM is still very good. It has nearly the audio of a
HIfi system , with comaprison with te same headphones (UR60 Koss )
3. AM efficiency is also quite good . Did not tested with other
comaprison but also soem low power signals are audible
And here are several pictures of the radio:
ON the right corner clockwise : Operation LED , operation button , band
button , up down freqs with cyclical buttons , mem up and down. (10 per
band)
Memory store , shortwave band ,sleep time (with 10 minutes steps
downwards ) and background light
A close up of the radios' botons and indicatins
Now to clsie this article that the radio after , has been defect since 2010 with no ability to repair them> There are no specific repairmen to do that
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