Pentranic chassis screen jumps

[Retroman839]

yep vr501 is b+ adjust but that is not the aim of this exercise, you are dummy loading the b+ to read the 25v line. reading the b+ is bonus and you can mark down the level for future reference

Somethimg
For after this ..

 

[Retroman839]

If only they screen printed the underside of this .

 

[gunblade]

don't matter what side of L501

 

[Retroman839]

Can I be clipped on any leg of the L501 ?

 

[Retroman839]

Can I be clipped on any leg of the L501 ?

Yeh read continuity across it and to the next cap só I was thinking it’s all connected .

Cool …
Well shall I power up ?

 

[Retroman839]

I’m on 200v dc range

 

[Retroman839]

Ground on main heat shield

Hv anode far away from me as is the bright arse bulb
Under the sun hat

 

[gunblade]

ok go for it

 

[Retroman839]

Very pleasant
Very pleasing

Steady 103.8
Little pleasing tick on sound very quiet
😊👍

 

[gunblade]

now you need to read the 25v line, you did link the diode anode to pin 3 of the transformer?

 

[Retroman839]

Bulb started to cook the straw hat ..🤣

So you might see my house

 

[gunblade]

not surprised, i use 40watt for future reference

 

[Retroman839]

not surprised, i use 40watt for future reference

Will do …

Will get it rigged back up
Then to tube and let’s see if jumping is no more.

Will return when it’s all connected up

Cheers mate Thats another beer I o u

 

[Retroman839]

Can I ask
With both primary windings coming in at 1 ohm
How do I know which is the collector of the fly back ..

Did I read it’s on the b+ line ?

 

[gunblade]

you have not completed the exercise, the whole point of this was to locate and connect a 25v clean supply line to the ic - you have not done that yet

how do you what pin of flyback goes to collector of the HOT? easy look at the schematics or follow the track of the HOT collector

 

[Retroman839]

you have not completed the exercise, the whole point of this was to locate and connect a 25v clean supply line to the ic - you have not done that yet

how do you what pin of flyback goes to collector of the HOT? easy look at the schematics or follow the track of the HOT collector

Cool ..
Só for 25v line clip on vcc leg of ic ?

 

[gunblade]

no you are not understanding my process, you do not know if you are going to get 25v so you need to prove it - you should isolate the resistor you replaced from the ic and with light bulb attached as dummy load as it is now you need to read the voltage you are getting on that resistor to make sure its correct

 

[Retroman839]

no you are not understanding my process, you do not know if you are going to get 25v so you need to prove it - you should isolate the resistor you replaced from the ic and with light bulb attached as dummy load as it is now you need to read the voltage you are getting on that resistor to make sure its correct

Ok
Só loft resister back out of circuit ..
Clip onto its leg and let’s see what the voltage is being supplied.

I had to run down to kids football

But back home in a few mins 👍

 

[gunblade]

yes exactly this, BUT i do not see that you have attached the anode of D506 to pin 3 of the supply transformer - in that case you will get sweet fa

 

[Retroman839]

yes exactly this, BUT i do not see that you have attached the anode of D506 to pin 3 of the supply transformer - in that case you will get sweet fa

Will take a look