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Old 12th Jan 2019, 8:20 am   #6
snowman_al
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Join Date: Dec 2018
Location: Llandeilo, West Wales, UK.
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Default Re: Stella ST113U- distorted sound causes ?

Hi Jolly 7,
Seriously Be Very Careful here. Do Not connect head phones across the speaker connections.

One end of the connection will be from the HT+ supply.
That is connected directly to the mains via the rectifier (UY85). You effectively have 240 volts DC 'mains' there... Really not a good combination with head phones.

I do not have any data, but there is enough from the internet to see the cathode resistor is 220 ohms (R20) and is on pin 2 of the UCL82.
The coupling cap (C24) is 0.01uF 400 volts (or better).

Plan to replace them both.
Flashing inside the UCL82, if that is the case, will need a replacement too.
And as sidband says, get an output transformer and replacement speaker. Do not stress over matching too much.

Again take care here. Alan
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