Hello!
Does anybody know the manufacturer or brand of the PL509 in the photos? It has two extra wings attached to the anode:
Thank you!
Does anybody know the manufacturer or brand of the PL509 in the photos? It has two extra wings attached to the anode:
Thank you!
I am not sure 100%, but didn't Japan make those with green line? I saw some tubes with that, not PL519 and they were made in Japan.
I do have some other tubes with the green line, different brands (Zaerix, Thorn etc) but it is not clear where they were manufactured. None of my other PL519s have extra wings attached to the anode.
Anything that adds surface area increases dissipation capability (But also capacitance to the rest of the universe).
That “stretched stop sign” around the type number supposedly indicates COO = Japan.
The wings on the plates were common on some high powered sweep tubes made by GE also. I have several different varieties of winged GE 36LW6's as well as some with no wings. The winged tubes do seem to eat more power than the wingless ones, but only if they were well built. It seems that all the winged tubes are older, and many seem one sided, as one plate will glow and the other will not. This leads me to believe that GE gave up on wings due to either added cost or alignment issues.
It has also been my experience that green ringed sweep tubes are Japanese, but I don't see too many European or Russian sweep tubes. Those that I have seen have a metallic ring. The ring is lossy at RF frequencies and serves to dampen parasitic oscillations.
It has also been my experience that green ringed sweep tubes are Japanese, but I don't see too many European or Russian sweep tubes. Those that I have seen have a metallic ring. The ring is lossy at RF frequencies and serves to dampen parasitic oscillations.
Has the »Philips PL 519« with the green ring in #10 got the typical Philips etch code? After the Western European tube production plants were shut down in ~1975, even Philips might have felt the need of buying tubes from elsewhere and rebrand them.
I also don't know where these green ringed tube comes from.
The silver rings seen on many European TV sweep tubes serve to remove static off the glass envelopes. Some, especially those of French origin, even are tied to a dedicated pin, see.
Best regards!
I also don't know where these green ringed tube comes from.
The silver rings seen on many European TV sweep tubes serve to remove static off the glass envelopes. Some, especially those of French origin, even are tied to a dedicated pin, see.
Best regards!
These PL519 (and also the PL509) with the green line were made by TOSHIBA in JAPAN. Philips just rebranded the one you see with the green line. I know this for a fact since I have several of them with the Toshiba factory marks on them - NOS. Stored safely away somewhere in a closet. Toshiba made quite a few sweep tubes with the green line on them. Very nice tubes. Japanese tubes are very underrated. They blow the new Chinese and Russian garbage away. Hands down.
Google this:
Toshiba tube green line band
Not all their tubes had a green band. Several other tube re-branders and manufacturers bought them from Toshiba and put their own name on them.
Hope this helps
Ken
Google this:
Toshiba tube green line band
Not all their tubes had a green band. Several other tube re-branders and manufacturers bought them from Toshiba and put their own name on them.
Hope this helps
Ken
Some photographic evidence to prove my previous statements.
https://www.ebay.co.uk/itm/283526755549
http://www.r-type.org/exhib/aaa0936.htm
http://foxtango.org/ft101/foxtangoft101final.htm
https://www.worthpoint.com/worthopedia/3x-toshiba-6js6c-green-band-vacuum-4151512692
https://www.worthpoint.com/worthopedia/matched-pair-toshiba-raytheon-label-3841238106
Ken
https://www.ebay.co.uk/itm/283526755549
http://www.r-type.org/exhib/aaa0936.htm
http://foxtango.org/ft101/foxtangoft101final.htm
https://www.worthpoint.com/worthopedia/3x-toshiba-6js6c-green-band-vacuum-4151512692
https://www.worthpoint.com/worthopedia/matched-pair-toshiba-raytheon-label-3841238106
Ken
