06-27-2012, 08:54 AM
Hi Terry:
Thanks for the reply. I did check the coil both primary and secondary and they are not open and the tertiary(?) winding has connection to the secondary winding. Another funny thing, there is no sound at all with c314 in place, and it has been replaced. I've just bought an EICO sweep marker and I want to see what the fm bandpass looks like. Philco complicated things by choosing 9.1 mhertz as the if. I already have a Heath sweep marker but it is for 10.7mhz not 9.1. The EICO has variable marker (I believe) so I should be able to adjust it to the Philco i.f. We'll see how that goes. I keep wondering if there should be a cap across the secondary of the ratio transformer. The schematic does not show one but similar schematics for other radios do. What do you think?
Thanks for the reply. I did check the coil both primary and secondary and they are not open and the tertiary(?) winding has connection to the secondary winding. Another funny thing, there is no sound at all with c314 in place, and it has been replaced. I've just bought an EICO sweep marker and I want to see what the fm bandpass looks like. Philco complicated things by choosing 9.1 mhertz as the if. I already have a Heath sweep marker but it is for 10.7mhz not 9.1. The EICO has variable marker (I believe) so I should be able to adjust it to the Philco i.f. We'll see how that goes. I keep wondering if there should be a cap across the secondary of the ratio transformer. The schematic does not show one but similar schematics for other radios do. What do you think?
