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CD9088CB ETC datasheet pdf data sheet FREE Datasheets (data sheet) search for integrated circuits (ic), semiconductors and other electronic components.
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I recently bought one of these little kits and am going to give it a try. Ive little experience with fine soldering, so ill have to take my time.
It uses a 9088 IC as FM tuner, a TDA2822 as AF amplifier. Its powerful enough to drive a 2' speaker as is, but I will probably add a single tube amp to the back end. Id like to mount this and hide it well in one of the early empty radio cabinets ive picked up. It might become my new shop radio.
Uploaded with Uploaded with but for ten bucks, all pieces included. I couldnt turn down this kit. Plus, i do need to hone my skills on finer soldering. It's kinda difficult to picture in my mind exactly what you're trying to do - but I'm assuming that chip is a surface mount device, right? Those need a certain technique to solder to a board with any great success, and here's how I did it: Place the chip in the exact position you want it in, and tack-solder two of the pins to the board, top left - and bottom right, so it cannot skew on the board. Next, get some soldering flux that comes in a syringe and use plenty of it all over the pins and board. Then, with a molten blob of solder on your iron tip, you use it like a brush and sweep the molten blob of solder down one row of pins.
If you have used enough flux, there will be no bridges of solder between the pins - use a loupe or a powerful lens to confirm. Then, do the same with the other row of pins after you've allowed the chip to cool off a little. Clean up all the excess flux when you're done. Yes you can scratch off some of that green solder mask and solder directly to the tracks if you wish. This is an old thread, but relevant to my questions.
Does anyone know: --previous posts talk about difficulty soldering the IC. Is this a surface mount device (SMD) or a DIP package?
I would prefer DIP, but I think it's probably SMD. --I'd like to re-purpose this kit into a simple 2 meter ham FM monitor. Nothing sophisticated. Has anyone tried different (smaller) inductors and can this device 'stretch' to about 150 MHz.? Does anyone know of a still-available FM radio IC that does NOT use scan tuning? I suppose I could disable the scan and just use a very small variable cap. Yd9088-top.png (15.26 KiB) Viewed 3975 times From a short reading of the datasheet, this chip seems intended for use on the FM broadcast band.