Quote:
Originally Posted by hans
Had issues wit the tubes on these also, but not all. The smaller were lived longer.
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Hi.
Yes the 20" A51 570X seemed to go flat quite soon but the little 14" A37 556X was a good tube that lasted well. I think the 16" tubes were also good.
With the 20" tubes we used to replace one of the series chokes feeding the tube's heaters, with a wire link. Philips suggested not to bypass both chokes, I guess to avoid overrunning the heater. I came across several sets where both chokes were shorted out.
Looking at the mains input board, it looks like the original green 4R7 5W surge limiter resistor has been replaced with a more reliable white ceramic type. As others have said tripler troubles were common but the LOPT is reliable. I used to get the odd tuner problems but I guess no more so than most sets.
I liked the KT3 and also it's big brother the K30, that was a real beauty.
Regards
Symon.