Good morning, 73 to all, it turns out that someone gave me a Rare Radio that I could not find absolutely anything on the internet and I am good looking, the radio in question is the Swan CM-150

There is also the alternative of making an OFV controlled by Arduino or PIC. I've already done these projects listed here http://www.qsl.net/om3cph/om3cph.htm and they work " mechanically "well to modernize an Atlas 210X that looks quite similar to the Swan. There is also an OFV with DDS and PIC that works perfectly. The 1480.5KHz IF doesn't sound very familiar to me but if you have it walking like this it will be. The Atlas uses frequencies of 5,400KHz in the FI. They are simple conversion equipment and that somewhere must have the sideband filter with some inscription or some carrier generation glass for LSB and USB. Behind the black front grille is the original OFV housing for the amateur radio version or the channel glass housing with their respective trim trimmers. Greetings and luck. Ric. PD: I had to turn off the light so that the details of the frequency meter, etc. will be noticed !! -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- -------------------------------------------------- - The FI (Intermediate Frequency) is the frequency where the sideband is generated and is also de-modulated in the receiver and that after a process of mixing by addition or subtraction the final output frequency of the equipment is achieved. If you placed 5609.5KHz and the equipment works at 7090KHz, the IF can only be the result of the difference between 7090-5609.5 = 1480.5KHz since the sum of the two would give us an IF of 12.699.5KHz and this is too high for The standards of the time. It is the basic process of a simple conversion sideband equipment. It is not the only one and there are those of double conversion where the product of the previous addition or subtraction is mixed again with another fixed frequency and the desired output is obtained and these are called double conversion. Regards. Ric.