My recently acquired 2B has some hum when first turned on until rf section comes up, and with RF gain off. Otherwise it can't be My recently acquired 2B has some hum when first turned on until rf section comes up, and with RF gain off. Otherwise it can't be heard. So, it isn't an operational issue. OTOH, my R-4 exhibits no hum that I can hear under any circumstances.
What is "normal" for the 2B, and should the main filter cap fail, what further damage is likely? Wouldn't the primary fuse protect the transformer if failure mode were short? Trying to decide whether preventative cap replacement is appropriate. 73, Curt KB5JO _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
