DSL100 5 dead tubes

[Buggs.Crosby]

what board issue do you have?....i'm not sure what the guy in the link you posted is referring to with r69 and r73.....r69 is a bias resistor....not so far related to your problem
i assume he is referring to r8 and r78 which should both be 100ohm

 

[Buggs.Crosby]

even if the solder went bad on one socket the others should be heating

 

[fweijers]

Good news!

The F1 fuse was the problem after all.
The fuse itself was ok, ... however its socket had a bad soldering.

I re-soldered it and now all tubes are glowing happily.

Thanks for the input guys!

 

[fweijers]

what board issue do you have?....i'm not sure what the guy in the link you posted is referring to with r69 and r73.....r69 is a bias resistor....not so far related to your problem
i assume he is referring to r8 and r78 which should both be 100ohm

I think he was referring to the power-divider which indeed is R67/R73 in the schema.
If you take out the EL34tubes, and measure from pin 2 or pin7 to ground, you should find 50 ohms.

 

[jcmjmp]

Good news!

The F1 fuse was the problem after all.
The fuse itself was ok, ... however its socket had a bad soldering.

I re-soldered it and now all tubes are glowing happily.

Thanks for the input guys!

Woo Hoo! Like I said, probably something simple.

 

[Buggs.Crosby]

what issue Schem are you looking at?....none of that has to do with the heaters....r67 is also a bias resistor