full data sheet for VR150 - UK Vintage Radio Repair and Restoration Discussion Forum

Al (astral highway) · 14th Jan 2008, 1:39 pm

I have the basic characteristics but does anyone please have full data sheet for this voltage regulator, preferably the JAN version, but otherwise any alternatives manufactured in the early 1940s, please.

Critically, I'm looking for max operating voltage (not strike voltage), and max decoupling cap value.

Thanks!

HamishBoxer · 14th Jan 2008, 2:20 pm

Would think its 150V which stabilizes + - 5volts
David

ppppenguin · 14th Jan 2008, 2:58 pm

How about this, found via the always excellent TDSL program.

http://www.mif.pg.gda.pl/homepages/f...41/g/GL874.pdf

XTC · 14th Jan 2008, 2:59 pm

This seems quite complete.

http://www.mif.pg.gda.pl/homepages/f...41/g/GL874.pdf

It came from the Duncan's Amps Tube Data Sheet Locator page.

The max applied voltage is 185V.

There's no mention of decoupling cap value, as far as I can see. It describes a relaxation oscillator in outline, but doesn't discuss cap values in detail. Presumably, a sufficiently large cap in that circuit would destroy the gas regulator in no time.

I've got a Brimar book which has a page on these tubes and gives a few additional details such as the temperature coefficient. It gives the max strike voltage as 180, and says that should always be provided to ensure striking throughout life.

The page notes that there must always be sufficient resistance to limit operating current to 40mA under steady state conditions but that during warm up, operation at 100mA is permissible but that the valve must be operated for several minutes at normal current afterwards.

I'd be inclined to do the sums and make sure that the valve doesn't conduct more than 40mA on peaks.

Pete.

plaka78 · 14th Jan 2008, 3:06 pm

From my Brimar Data Book

Min Starting Volttage = 180v

Operating Voltage = 150v

Min Current = 40mA

Max Current = 100ma

Regulation = 5.5v (min to max currents)

Al (astral highway) · 14th Jan 2008, 3:38 pm

Thank you to everyone who posted in reply. This is very helpful.

14th Jan 2008, 1:39 pm	#1
Al (astral highway) Dekatron Join Date: Nov 2006 Location: London, UK. Posts: 3,496	full data sheet for VR150 I have the basic characteristics but does anyone please have full data sheet for this voltage regulator, preferably the JAN version, but otherwise any alternatives manufactured in the early 1940s, please. Critically, I'm looking for max operating voltage (not strike voltage), and max decoupling cap value. Thanks! __________________ Al

14th Jan 2008, 2:20 pm	#2
HamishBoxer Dekatron Join Date: Aug 2007 Location: W.Butterwick, near Doncaster UK. Posts: 8,932	Re: full data sheet for VR150 Would think its 150V which stabilizes + - 5volts David

14th Jan 2008, 2:58 pm	#3
ppppenguin Retired Dormant Member Join Date: Dec 2003 Location: North London, UK. Posts: 6,168	Re: full data sheet for VR150 How about this, found via the always excellent TDSL program. http://www.mif.pg.gda.pl/homepages/f...41/g/GL874.pdf

14th Jan 2008, 2:59 pm	#4
XTC Retired Dormant Member Join Date: Oct 2004 Location: Bristol, UK. Posts: 837	Re: full data sheet for VR150 This seems quite complete. http://www.mif.pg.gda.pl/homepages/f...41/g/GL874.pdf It came from the Duncan's Amps Tube Data Sheet Locator page. The max applied voltage is 185V. There's no mention of decoupling cap value, as far as I can see. It describes a relaxation oscillator in outline, but doesn't discuss cap values in detail. Presumably, a sufficiently large cap in that circuit would destroy the gas regulator in no time. I've got a Brimar book which has a page on these tubes and gives a few additional details such as the temperature coefficient. It gives the max strike voltage as 180, and says that should always be provided to ensure striking throughout life. The page notes that there must always be sufficient resistance to limit operating current to 40mA under steady state conditions but that during warm up, operation at 100mA is permissible but that the valve must be operated for several minutes at normal current afterwards. I'd be inclined to do the sums and make sure that the valve doesn't conduct more than 40mA on peaks. Pete.

14th Jan 2008, 3:06 pm	#5
plaka78 Pentode Join Date: Jul 2007 Location: Salisbury, Wiltshire, UK. Posts: 174	Re: full data sheet for VR150 From my Brimar Data Book Min Starting Volttage = 180v Operating Voltage = 150v Min Current = 40mA Max Current = 100ma Regulation = 5.5v (min to max currents)

14th Jan 2008, 3:38 pm	#6
Al (astral highway) Dekatron Join Date: Nov 2006 Location: London, UK. Posts: 3,496	Re: full data sheet for VR150 Thank you to everyone who posted in reply. This is very helpful. __________________ Al