08-20-2009, 08:19 AM
Thanks codefox1.
Yeah, tube guitar amps are a gateway drug for sure...
1). In my digging around here I saw a post that seems to be talking about the same part. If I understood correctly, this was a tuned circuit (to IF) that is not entirely necessary now. Replacement with just a cap is OK. Not sure I fully understand why, but maybe someone can elaborate.
2). Yeah, I just don't have a .0015 on hand, and no immediate need to place an order which could include it. I was just thinking that given its location and small size, it could be just doing a blocking job of some sort and its value was less critical.
3). Like I said, no hum right now, so I'll just assume the pair of 22's is adequate filtering for the moment. The old caps were probably just what was on hand in this less value-important area.
I'm not particularly concerned with the alignment for now, which seems pretty close. Don't really have a sig gen anyway. Unless someone knows of a quick and dirty for minor adjustment using a known radio station.
Is there any real benefit to putting in "new" tubes if the ones in there now are working? I ask because in some applications (like guitar amps) the old ones can still work but start getting dull after a time, but before they fail outright. But maybe radios don't operate in such a way that it makes a difference. (A full set for this thing looks to be <$30)
Yeah, tube guitar amps are a gateway drug for sure...
1). In my digging around here I saw a post that seems to be talking about the same part. If I understood correctly, this was a tuned circuit (to IF) that is not entirely necessary now. Replacement with just a cap is OK. Not sure I fully understand why, but maybe someone can elaborate.
2). Yeah, I just don't have a .0015 on hand, and no immediate need to place an order which could include it. I was just thinking that given its location and small size, it could be just doing a blocking job of some sort and its value was less critical.
3). Like I said, no hum right now, so I'll just assume the pair of 22's is adequate filtering for the moment. The old caps were probably just what was on hand in this less value-important area.
I'm not particularly concerned with the alignment for now, which seems pretty close. Don't really have a sig gen anyway. Unless someone knows of a quick and dirty for minor adjustment using a known radio station.
Is there any real benefit to putting in "new" tubes if the ones in there now are working? I ask because in some applications (like guitar amps) the old ones can still work but start getting dull after a time, but before they fail outright. But maybe radios don't operate in such a way that it makes a difference. (A full set for this thing looks to be <$30)
