I wonder if somebody could help me understand something. I need to visualise things in simple terms.
The IF frequency is governed by the tuned reaction of the IF transformers, and normally all the IF transformers have to be within a certain tolerance tuned to the same IF frequency. But if you only have the one IF transformer such as in this KB 402 then if I altered the tuning of the IF transformer from 120 to 130 kHz would this change the RF alignment, and what effect would it have? Would it tend to cause the HF end of the band to be lost, or would it increase the HF coverage at the expense of the LF coverage.
At the moment both bands are working very well, but R4 LW is coming up at 1600m on the scale, and the LW tracker trimmer seems to have no effect.
Would the increase of the IF to 130 bring R4 onto the 1500 mark (approximately).
Tracking on MW seems to be easily adjusted so I am hoping that the change in IF can be compensated for.
thanks
Mike
The IF frequency is governed by the tuned reaction of the IF transformers, and normally all the IF transformers have to be within a certain tolerance tuned to the same IF frequency. But if you only have the one IF transformer such as in this KB 402 then if I altered the tuning of the IF transformer from 120 to 130 kHz would this change the RF alignment, and what effect would it have? Would it tend to cause the HF end of the band to be lost, or would it increase the HF coverage at the expense of the LF coverage.
At the moment both bands are working very well, but R4 LW is coming up at 1600m on the scale, and the LW tracker trimmer seems to have no effect.
Would the increase of the IF to 130 bring R4 onto the 1500 mark (approximately).
Tracking on MW seems to be easily adjusted so I am hoping that the change in IF can be compensated for.
thanks
Mike
