01-18-2013, 09:09 PM
I just finished one of these. It is the last in the 60 series, run 7 I believe. My question is this:
It plays strong and very clear and tracks well, but when tuning strong stations they overlap by about 35kc on either side of the station, i.e. when tuning 770, I hear the station from about 750 to 820 (820 is a weaker station and I hear both then). With 710 I hear it from about 690 to 750kc.
On strong lower frequencies (570 and 620) I get a squeal as I tune to them and i hear a slight oscillation. I switched the 6A7 and 78 tubes, but don't have a 75 to try in case it is a tube. I did change all caps and resistors except one mica. I did peak the IF's. What might cause this?
In comparison, I have a Zenith 5S29 that tracks well and strong, but it has less bandwidth when tuning. Is this just due to the different designs of these two radios or is something wrong with my 60?
Steve
It plays strong and very clear and tracks well, but when tuning strong stations they overlap by about 35kc on either side of the station, i.e. when tuning 770, I hear the station from about 750 to 820 (820 is a weaker station and I hear both then). With 710 I hear it from about 690 to 750kc.
On strong lower frequencies (570 and 620) I get a squeal as I tune to them and i hear a slight oscillation. I switched the 6A7 and 78 tubes, but don't have a 75 to try in case it is a tube. I did change all caps and resistors except one mica. I did peak the IF's. What might cause this?
In comparison, I have a Zenith 5S29 that tracks well and strong, but it has less bandwidth when tuning. Is this just due to the different designs of these two radios or is something wrong with my 60?
Steve
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