larschr
03-08-2006, 01:26 PM
The markings are washed off this tube, and i wonder what kind it is.
I know the following:
It comes from a black and white TV, mid 60s i guess.
It has 9 pins (one not connected) and a top connection.
It is bigger than most other european tubes.
Maybe it is a high voltage rectifyer?
John Folsom
03-08-2006, 10:12 PM
More likely a damper tube (6v3 for example)
http://www.nj7p.org/Tube1.php?tube=6v3
dr.ido
03-08-2006, 10:32 PM
Damper diode, possible a PY500 if it was from a european series string set.
larschr
03-09-2006, 01:11 AM
Yes, it comes from a European set (maybe a Philips). The heater current is 300mA.
Giulio Maiocco
03-09-2006, 05:10 AM
Hi,
I would bet the tube is a PL500 or PL504.
Just my 2cents
Cheers
Giulio Maiocco
pallophotophone
03-09-2006, 06:20 PM
Put the tube in your refridgerator for an hour or two, then remove it and breathe on the glass. The number may become visible in the glass while the condensation remains.
I've had some luck rubbing with a soft leaded pencil, but the fridge trick most always works.
Bob
peverett
03-09-2006, 09:44 PM
There were several damper tubes with similar to this in appearence that were used in B&W TVs in the 1960s. I have quite a few of these. The 6V3 has already been mentioned. Others are 20AQ3, 30AQ3, 17BR3, etc. I do not know the origin of the tubes, but they were used in sets sold in the US.