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Old 29th Mar 2019, 6:34 pm   #12
Semir_DE
Tetrode
 
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Join Date: Jan 2019
Location: Heusenstamm, (Near Frankfurt am Main), Germany.
Posts: 59
Default Re: Assistance with modulator design

Hi everyone,

I just wanted to let you know that I am in the process of designing a modulator with PLL that can be tuned accurately to any frequency in 250kc increments. It will use an old Motorola MC145106 PLL chip that can be set up with a simple dip switch -no processor or programming required.

After reading Matts post I am now thinking of making a combination of this PLL and the TDA 5660. This would give any audio-vision spacing with FM carrier and can be tuned to any frequency in the VHF bands.

Semir
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