MK484 AM Radio IC
I also sell YS414, TA7642, UTC7642, CD7642
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The Mk484 IC has automatic gain and up to 72 db gain. It is cased in a TO-92 Case looks like a transistor. The MK 484 runs on 1.1 to 1.8 volts so a single 1-1/2 volt battery will work.
The MK484 MK-484 MK 484 is a AM radio receiver replaces the older ZN414. The only difference between the MK484 and the ZN414 is pin out.
The YS414, TA7642, UTC7642, CD7642 are all the same devices as the MK484 only they are made by different manufactures.
I do not sell equivalent parts if your order a MK484 I ship a MK484 not one of the others.
Here is the circuit diagram for the MK484 Kit-4.pdf
Here is an alternate shematic for Kit-4 Alternate MK484 Radio Kit-4.pdf
Here is the circuit diagram for the MK484-Kit-5.pdf
MK484 IC's and Kits
MK484 Kit With High Impedance Headphones
YS414 IC's and Kits
YS414 AM Radio Kit, same as the MK484 - 4 Kit but has a YS414 instead of the MK484 IC.
TA7642 IC's and Kits
TA7246 is on sale until some of my stock is depleted. Then they will go back to the higher price again. I have over 1000 for this sale. No further discounts will be given on this item. The TA7642 kits have no discount this is for the TA7642 IC only.
TA7642 AM Radio Kit, same as the MK484 - 4 Kit but has a TA7642 instead of the MK484 IC.
CD7642 IC's and Kits
CD7642 AM Radio Kit, same as the MK484 - 4 Kit but has a CD7642 instead of the MK484 IC.
UTC7642 IC's and Kits
UTC7642 AM Radio Kit, same as the MK484 - 4 Kit but has a UTC7642 instead of the MK484 IC.
Order Variable Capacitors Here. The MK484 Kits Use the 60/141pf Models.
Screws and washers for the variable capacitor are available in two lengths: 5/32" (4mm) and 3/16" (5mm).
CAUTION: The internal parts of the variable capacitor can be damaged easily if the screw enters the variable capacitor too far. Please check for clearance.
680uh tap at 470uh and 788uh center tap and tap about 20 turns from end are flat bar type 1/2 X 3/16 X 2-1/8 long.
My kit uses the 680uh tap at 470uh
Part # AAHolder , AA Battery Holder Price $0.97 Each
Part # ExtKnob Extension and Knob for the above Capacitor $1.87 Each
The diameter is about that of a dime.
Part # LrgExtKnob Larger Knob buy 3/16 than the other knob set $1.97
The diameter is about that of a nickel.
Part # HP, High Impedance Headphones (2000 Ohm Impedance) with 1/4 inch mono plug end. $29.95
1/4 Inch Headphone Jack for my 2000 Ohm High Impedance Headphones
Part # 1/4-Jack $1.97 each.
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