These crystal oscillators are used in the Super Nintendo in the regions NTSC (USA, Canada, Japan, etc.). 21,47727 MHz may seem a strange frequency, but it is exactly 6 times the frequency used in the NTSC standard: 3,579545 MHz, so that to generate the sub-carrier NTSC system color, just divide the frequency by 6.
Unfortunately the Super Nintendo that came to Brazil needed to be transcoded to work with colors in our PAL-M TV, who at the time they were not compatible with NTSC and PAL-N, like today.
For both, crystal oscillators 21,47727 They were replaced MHz crystal oscillator 21,453666 MHz,
the crystal oscillator Beast, whose frequency is exactly 6 times the frequency of the subcarrier of the PAL-M: 3,575611 MHz. Some other changes were also made, lifting legs integrated circuit and inserting resistors and capacitors in the circuit. Usually everything was done well nastily.
For the Super Nintendo back to NTSC as original, We must remove all gambiarra and replace the oscillator crystal 21,453666 MHz by a 21,47727 MHz. And that's where the Bundled with 100 Oscillators crystals 21.47727 MHz Super Nintendo SNES NTSC.
Since this is the kind of thing that I find in my town, you need to buy over the Internet and then the freight becomes the most expensive element, fault of the Post Office
, the state created straight from hell. Como não gosto de gastar mais com frete do que com produto, comprei logo o pacote com 100 direto from China, e paguei um preço e um frete menores que os que pagaria no Brasil.
Check out the photos and the video of the unboxing from the Bundled with 100 Oscillators crystals 21.47727 MHz Super Nintendo SNES NTSC:
These are the package tracking information obtained on the site of the station:
|Delivered to the addressee object|
|Object out for delivery to the recipient|
INDAIATUBA / SP
Treatment Unit in INDAIATUBA / SP for distribution Unit in [REMOVED] / SP
CAJAMAR / SP
Treatment Unit in CAJAMAR / SP for Treatment Unit in INDAIATUBA / SP
CURITIBA / PR
Distribution Unit in CURITIBA / PR for treatment plant in CAJAMAR / SP
|Customs supervision terminated|
|Object received by the post Office of Brazil|
of Country in CHINA / countries in International treatment unit / BR
|Object received in export unit|
This is the table-summary of purchase:
|Product Name:||Bundled with 100 Oscillators crystals 21.47727 MHz Super Nintendo SNES NTSC|
|Name Original:||Free shipping 100pcs/lot 21.47727 MHZ HC – 49 s passive crystals into 21.4772 MHZ to 21.477 MHZ 20 parts per million (PPM)|
|Store:||AliExpress | Store: YT Electronics components co.,ltd|
|Current value:||R$ 33,00 (US$ 8,16)|
|Payment Method:||Credit Card Visa International|
|Shipping Fee:||R$ 6,86|
|Package Home Country:||China|
|Time in Transit:||19 days|
|Declared content:||ICS 21.47727MHZ X 100|
|Type Marked Content:||–|
|Declared Value:||US$ 5|