Re: Tubes question!

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Kreso Bukvic" <kreso.bukvic-at-kc.htnet.hr> 

Yes one tube that didnt havee the markings had one  turn arround the
flyback.

Well since i wont build anything oout of them if sombody needs them, contact
me :-).

Best Regards

KReso Bukvic
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, October 02, 2004 10:41 AM
Subject: Re: Tubes question!


 > Original poster: "Christoph Bohr" <cb-at-luebke-lands.de>
 >
 > Hello Kreso.
 >
 > Finally some questions I can answer ;-)
 >
 >  > Biggest one is PL-519
 >
 > The PL519 is a Pentode used for horizontal deflection amp in TV
 > sets.
 > It is pretty powerfull, very linear and can be used to build a
 > VTTC or a RF amp.
 > There are CB-band amps out there that employ the EL519, which is
 > the same tube,
 > only with 6,3V filament. ( the P stand for 300mA filament used in
 > serial connection without
 > a filament transformer, thus all the tubes from one TV should be
 > of the P type.
 > The PL 519 reaches 300mA around 40V,
 >
 >  > Then smaller one is PY-500A
 >
 > This is a "Zeilenschalter" tube whoch would directly translate
 > into "line switch" which is
 > probably not the correct translation. It twitches the beam off at
 > the end of a line until it reaches the next
 > starting point and then switches it back on.
 > Can be used to generate X-Rays as you can see from the other
 > thread the is currently running.
 >
 >  > The next one does not have any markings, but it-s top was
 > connected to a
 >  > flyback ( maybe a rectifier?)
 >
 > This is most probably a DY 86 or DY 88 which is a HV rectifier
 > for the picture tube voltage and was
 > mountet very close to the Flyback. A funny thing is, this is not
 > a P type but a D type that is also called
 > "battery tubes" as the filament voltage is only 1,4V. So where
 > did the 1,4V come from?
 > It came from an extra winding on the flyback, OK I guess the FB
 > can deal with the 0.84Watt extra power.
 > Max voltage is around 20KV at 22% duty cycle, max 18µS and around
 > 150 to 200 µA
 > Can be re-used fo a small battery audion receiver or try to
 > generate X-Rays ;-) This is a high vacuum type.
 >
 >  > And the smallest is 3 letters - 3 numbers
 >  > Im not sure about first letter here ->OCF-802
 > This is a PCF 802 used in conversion transducer stages, sometimes
 > the pentode system is used in the
 > intermediate frequency stage with UHF tuners. Filament is 300mA,
 > 8,5V.
 > I have no idea what this could be used for, maybe as preamp and
 > phase inverter in a push pull
 > VTTC if such a thing is possibly....
 > BTW, this is a simple system: PCF802
 > P= 300mA
 > C= triode
 > F= pentode
 > 8= can mean linear, the rest is usually internal stuff.
 >
 > Congratulations, its alway good to safe this old stuff from the
 > dumpster.
 >
 > regards
 >
 > Christoph Bohr
 >
 > Good luck and safe the tubes.
 >
 >
 >
 >