TSE Heater 300b

[Green77]

Hi all!

Time to take care of my hum problem when my TSE (300b) is cold. I have discust this with you here before
but haven't done anything about it.

I will install a new trafo for the heater to the 300b. 5842 will be connected as today.

Thinking like this:

An externally hosted image should be here but it was not working when we last tested it.

But should my new heater circut be connected to TSE ground? Or should they "live" there own life?

Regards //Daniel

 

[rknize]

Yes, because the heater is also the cathode on DHTs. I notice you are using the LM317 as a current-regulated power supply. Don't some 300B's have different current requirements on their heaters?

 

[Green77]

Thanks. I will try this tomorrow.
I will use lm338, hope this works better in my TSE.

Regards //Daniel

 

[Celsius]

Thanks. I will try this tomorrow.
I will use lm338, hope this works better in my TSE.

Regards //Daniel

What´s about your DHT?

 

[Green77]

Hi

I haven't done it yet, some other amps slipp in between 🙂
But i have all the part and have done a small pcb so it will be done
soon.
Regards// Daniel