UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - FM to AM converter

coopzone · 21st Sep 2018, 5:13 pm

This was the original article: http://www.i4cy.com/m0oox/fm2am/

I just built the transmitter part.

All I really did was adjust the 220pf caps to 150pf in order to move the frequency along the scale, we have a local radio station very close to where the original was set for. I wired the am_disable to ground so it's on all the time. I used a different transistor (I had a bc457 in by box of bits). I also had to tweak the value of the input resistor to get a slightly better volume level.

Derek

21st Sep 2018, 5:13 pm	#3
coopzone Hexode Join Date: Jan 2018 Location: Cannock, Staffordshire, UK. Posts: 268	Re: FM to AM converter - variation on a theme! This was the original article: http://www.i4cy.com/m0oox/fm2am/ I just built the transmitter part. All I really did was adjust the 220pf caps to 150pf in order to move the frequency along the scale, we have a local radio station very close to where the original was set for. I wired the am_disable to ground so it's on all the time. I used a different transistor (I had a bc457 in by box of bits). I also had to tweak the value of the input resistor to get a slightly better volume level. Derek