XT Crystal value?

[zanor]

This may be a dumb question but I have some XT crystal that I'm not sure how to read theire frequency.

Theese are the labels:
8.867238 (is it kHz? MHz?)
4000.000 (4000MHz? 4MHz?)
6.000 (6MHz? 6KHz?)
4000,000kHz (That's the same as 4MHz right?)

 

[Nigel Goodwin]

This may be a dumb question but I have some XT crystal that I'm not sure how to read theire frequency.

Theese are the labels:
8.867238 (is it kHz? MHz?)
4000.000 (4000MHz? 4MHz?)
6.000 (6MHz? 6KHz?)
4000,000kHz (That's the same as 4MHz right?)

8.867238MHz - 2x colour sub carrier crystal
4MHz
6MHz
4MHz

 

[zanor]

Thanks!!

8.867238MHz - 2x colour sub carrier crystal

But what is this? Please explain..

 

[Nigel Goodwin]

Thanks!!

8.867238MHz - 2x colour sub carrier crystal

But what is this? Please explain..

The PAL colour sub carrier is 4.43361875MHz, many modern decoders use a crystal of double that frequency - so it's a colour decoder crystal from a 'modern' PAL TV.

 

[zanor]

Thanks again! And yes I got it from a "modern" (198x) tv hehe

 

[Nigel Goodwin]

Thanks again! And yes I got it from a "modern" (198x) tv hehe

Yes, that's a 'modern' one, 'old' ones have 4.43361875MHz crystals instead :lol: