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40-201 had shorted capacitor
#6

All the old paper type capacitors have now been replaced and most of the resistors as well. There were a few exceptions. Some resistors were 20% types and bridged across an inductor. I left those alone as they are just there for reducing the Q of the circuit to broaden response. Some of the bypass capacitors in the front end and IF strip could be well served by .01 disc ceramic capacitors which would have shorter leads and less inductance added to the circuit. However, it is not critical since the IF is only 455kHz. In the RF it could be a potential issue as the SW high band operates up to 18mHz which could be an issue depending on other circumstances. All in all, I have to say the radio works quite well as it is. The last order of capacitors from tubesandmore also took care of replacing the new electrolytic that had shorted intermittently. The new one has a 450VDC rating while the one first used was only a 300VDC unit. It proved not to be able to handle warm-up voltage surges.

Joe


Messages In This Thread
40-201 had shorted capacitor - by Joeztech - 12-22-2013, 11:05 AM
RE: 40-201 had shorted capacitor - by morzh - 12-22-2013, 01:08 PM
RE: 40-201 had shorted capacitor - by Eric Adams - 12-22-2013, 01:36 PM
RE: 40-201 had shorted capacitor - by Joeztech - 12-23-2013, 09:05 AM
RE: 40-201 had shorted capacitor - by codefox1 - 12-23-2013, 04:01 PM
RE: 40-201 had shorted capacitor - by Joeztech - 12-29-2013, 07:21 PM



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