I introduced Kaido KK-2005A in the previous post "China made SW radios review". As I recently found this model with the new technology - poptentiometer tuning I would like to compare the new model with the old model.
Kaide KK-2005A - Old and New
The old and mew models are exactly the same in outlook and even the model name KK-2005A. The basic functions are also the same FM/AM/SW(7 bands). The retail prices are also the same about US$15.
What are the differences ?
Slight but noticeable difference are weight and sound. Big differences are inside.
1) Insides
We can find revolutionary changes between the old and new inside. Please see below.
a) Old model
One side
You can find that the PCB name is KK-2005 and one PVC (Poly Vari Con), four IFTs, 3-4 Ceramic Filters, several Air Coils and many Ceramic Disc Caps for tuning. Two major ICs - Radio IC CD2003GP and Audio OP Amp D2822A. These are all through hole parts.
the other side
b) New model
One side
You can find the PCB name is KK-2005KT.
This side has almost none on it except one potentiometer at center and two Al. Electrolytic Capacitors. No PVC (Poly Vari Con), no IFTs, no Ceramic Filters, no Air Coils, no Ceramic Disc Capacitors, nothing of these parts crowdedly placed previously. All of them gone away.
the other side
Three major ICs are found.
Radio IC KT0936M (18 pins)
Audio Amp IC LPA8003S
LDO Regiator IC AMS1117-3.3V
Plus many chip resistors. All SMT parts.
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Old Model
7 SW bands: 5.67-6.43MHz, 6.96-7.87MHz, 9.28-10.36MHz, 11.15-12.28MHz, 13.15-14.00MHz, 14.90-15.80MHz, 17.06-17.90MHz
New Model
7 SW bands: 5.95-6.20MHz, 7.10-7.30MHz, 9.50-9.90MHz, 11.65-12.05MHz, 13.60-13.80MHz, 15.10-15.60MHz, 17.50-17.90MHz
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The reproduced sounds are noticeably different.
Old Model (1W 8 ohm Speaker) - so called 'analog sound' - soft, round and somewhat deep to my ears.
New Model (1W 8 ohm Speaker) - so called 'digital sound' - hard, edged and somewhat shallow to my ears but not uncomfortable.
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Weight
The new model is lighter than the old model due to much less component count.
sptt
New Model
7 SW bands: 5.95-6.20MHz, 7.10-7.30MHz, 9.50-9.90MHz, 11.65-12.05MHz, 13.60-13.80MHz, 15.10-15.60MHz, 17.50-17.90MHz
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The reproduced sounds are noticeably different.
Old Model (1W 8 ohm Speaker) - so called 'analog sound' - soft, round and somewhat deep to my ears.
New Model (1W 8 ohm Speaker) - so called 'digital sound' - hard, edged and somewhat shallow to my ears but not uncomfortable.
-------
Weight
The new model is lighter than the old model due to much less component count.
sptt
