Tubes?

[z_p_e]

I see.

So either you had a very large series resistance there, or the input capacitance to your probe and scope is relatively high, because definately there is some LPF effect there judging by the rounded bottom of the wave form.

Where is the 0V line in that scope shot, and what was the V/div setting?

Darren

[pese]

@all , there have problems

to find the right tube

to find the datascheets .

to see the characteristics.


the best (german) collection you find in:

http://www.shinjo.info/frank  TUBE DATASHEETS

http://video.google.com.au/videoplay?docid=-4939521797516461861 pyramide trawoeger


atention most tubes are from different manufacturers avaiable
if you chose the PHILIPS Datashe --- that is engl germ and french

Gustav Pese

I used them professionel .

some types in my stock

http://beepworld.de/members29/pesetrier/halbleiter-semicond.htm

[Jdo300]

Hey Marco,

Thanks for the clarified image. Is that coil in the top right corner of the diagram just a choke for the B+? Does that book give you any rough ideas for the component values?

God Bless,
Jason O

[turbo]

hi Jason
The book only covers the parts for building radio's.
I have read it a couple of times and i will read it again because it is as if i keep reading new things in it.
The coil you mentioned is indeed a choke to prevent oscillations to the Hv line.

Marco.

[turbo]

I see.

So either you had a very large series resistance there, or the input capacitance to your probe and scope is relatively high, because definately there is some LPF effect there judging by the rounded bottom of the wave form.

Where is the 0V line in that scope shot, and what was the V/div setting?

Darren

The scope is a self built kit i took over from somebody who assembled it.
I was disapointed by it's operation and it keeps giving callibration errors, therefore i only use it to examine the wave form.
normally i just push the buttons untill it gives a clear image of the wave form, not paying too much attention to the settings, and that is all i have to play with.
when i was at the old barn with the old guy i saw in his barn a old cathode ray scope from the millitairy, it was missing some knobs and i was wondering if it still worked.
i left it there but i am seriously thinking about going to get it since it always turns out "the old stuff is the best stuff"

Marco.