16-03-2017, 02:20 AM
(This post was last modified: 16-03-2017, 02:34 AM by Nowhere-Man.)
I hope you all have a sense of humour. Pretty much all my friends are female and one of them thinks it's some sort of "numbers OCD" as she puts it. I had to chuckle when I read this, though, as I'd been working out some random 0.6 modulation index to compare Narrowband FM to AM. Let me say though, crazy as it may be, it somehow focuses the mind away from the problems of routine life (such as bills, stresses and other factors). Tonight I think I pretty much got the basic concept of how an FM modulated carrier can be rectified using phase to convert to amplitudes and AF.
On the practical side those knobs operate the two IF's I have. That's where my thead got kind of wacky when I was figuring out the FM 30 Mhz IF circuit (Lawrence was very helpful there).
I feel sure button one is where the trouble lies. On Grundigs you can unscrew the mech but these are tab soldered. However my plan is to insert a micro-camera or sthe imilar contrivance (the Russian engineers say they used syringes as well). The PCB board is not the best and does show wear. You can see this by shining a light. The amount of dirt I shifted from the upper board and around the switch mec was awesome. I do need to change "that capacitor". And one or two wax caps if I can get to them. As to performance it is now much better.
On the practical side those knobs operate the two IF's I have. That's where my thead got kind of wacky when I was figuring out the FM 30 Mhz IF circuit (Lawrence was very helpful there).
I feel sure button one is where the trouble lies. On Grundigs you can unscrew the mech but these are tab soldered. However my plan is to insert a micro-camera or sthe imilar contrivance (the Russian engineers say they used syringes as well). The PCB board is not the best and does show wear. You can see this by shining a light. The amount of dirt I shifted from the upper board and around the switch mec was awesome. I do need to change "that capacitor". And one or two wax caps if I can get to them. As to performance it is now much better.
