KlaasBaas
New Member
A friend of mine bought a Crown FM1 tuner in good shape.
A US tuner thus 115 volt.
No issue for me to convert it to 240 volt EU (Netherlands that is).
De-emphasis converted to 50 us, there was a switch on the board for this.
But now.. US and EU frequencies differ in steps and base number. (FM)
We (EU) make steps of 100 Khz whereas US 200 Khz.
We (EU) tune in most cases on even numbers, 94,6 94,8 Mhz etc.
Is there a way to change this on a Crown FM1 ?
There is a microcontroller in the FM1 called AY-3-8115, but I can't find relevant info on this IC.
I could place a trimmer of 22 pF in series with the crystal to tune it closer to say 96,8 Mhz.
The display will stay state 96,7 or 96,9, I know.
And the steps will remain 200 Khz for sure.
Any ideas or help ?
A US tuner thus 115 volt.
No issue for me to convert it to 240 volt EU (Netherlands that is).
De-emphasis converted to 50 us, there was a switch on the board for this.
But now.. US and EU frequencies differ in steps and base number. (FM)
We (EU) make steps of 100 Khz whereas US 200 Khz.
We (EU) tune in most cases on even numbers, 94,6 94,8 Mhz etc.
Is there a way to change this on a Crown FM1 ?
There is a microcontroller in the FM1 called AY-3-8115, but I can't find relevant info on this IC.
I could place a trimmer of 22 pF in series with the crystal to tune it closer to say 96,8 Mhz.
The display will stay state 96,7 or 96,9, I know.
And the steps will remain 200 Khz for sure.
Any ideas or help ?