Hi! I was given a Selena B215 radio. Hardly I have been cleard the contacts from the band selector switch and I changed the red condensers with others new. The problem is that on the radiomuseum it is said that the radio is on the 88-108 and on the other sites it is said that is tune 65-73. My radio tunes 65-73MHz..and I saw different diagrams of Selena B216 with tables with values for 215 and 217,but the blocs look different: blocs with all transistors npn and blocs with 2 transistors pnp and one npn.. Also there are two lists: E-1 and E-2. I saw that both E-1 and E-2 have smaller values than the original shown bloc,but I don't know which variant to choose for work on the FM West band ?E-1 or E-2?
I think that the only difference between 215/216/217 should be on the FM bloc and on the SW bands received.
Also,at power supply I have two transistors,not one and a zenner like how is shown in the diagram.
On MW and LW and some of SW band the S-meter works very good,but on FM after I tuned the FI with a 10,7MHz signal generator I hardly saw a half of a gradation
. I tried to put a converter before the FM bloc to tune a part of the 88-108 (98-108)but it has harmonics and some stations are tuned very closely or distorted by the others,and ,again,the maxim signal is only a half of a gradation (like on ruler a gradation is 1cm,and a half is 0,5cm)
Other difference is the R25 variable resistor connected to another part of the circuit,not to L12.2