03-25-2012, 11:04 PM
Thanx, Arran. (and I think Ron, too).
The 6X5 issue is an interesting one. Zenith was the big offender (player), in the use of 6X5's in the rectifier duty. Our friends in Chicago had a nasty habit of bloating their tube counts, even a little. I'm sure that they considered it innocent enough to put two 6X5's in place of one 5Y3 (or 5Y4) in the rectifier sockets. I've never had a problem with having a 6X5 in an auto set. Zenith owners have had lots of trouble, though. I attribute that to the fact that the "Z" boys ran the 6X5's at higher plate voltages, and caused flashovers that happened lots less in automotive sets.
Go figure: There were loads of automotive sets that used 84 rectifiers. I never heard of ONE of them flashing over in a car set. And, quite a few of those auto sets were PHILCO!! And also remember that the 6X5 is simply an octal based 84! A 6X5 flashing over in a household set, meant curtains for the power transformer, and Zenith had no reputation for over specced power transformers
Back to the 37-650, I'm going to look into the accessibility of the rectifier socket.
The 6X5 issue is an interesting one. Zenith was the big offender (player), in the use of 6X5's in the rectifier duty. Our friends in Chicago had a nasty habit of bloating their tube counts, even a little. I'm sure that they considered it innocent enough to put two 6X5's in place of one 5Y3 (or 5Y4) in the rectifier sockets. I've never had a problem with having a 6X5 in an auto set. Zenith owners have had lots of trouble, though. I attribute that to the fact that the "Z" boys ran the 6X5's at higher plate voltages, and caused flashovers that happened lots less in automotive sets.
Go figure: There were loads of automotive sets that used 84 rectifiers. I never heard of ONE of them flashing over in a car set. And, quite a few of those auto sets were PHILCO!! And also remember that the 6X5 is simply an octal based 84! A 6X5 flashing over in a household set, meant curtains for the power transformer, and Zenith had no reputation for over specced power transformers
Back to the 37-650, I'm going to look into the accessibility of the rectifier socket.
