AC lines in Belgium

Tweakers' Asylum

Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

195.0.2.193

Hi,
I posted a few days ago a question asking how to set the idling
currents and dc offset voltage.
I managed to get my hands on the schematic of the 2235B.
I set the idling current and the offset (although only I only managed
to set it on one channel, I will probably have to fix the bias
circuits).
Although one channel seems to need some fix up, the amps sounds OK.
But many components were running a bit to warm to what one might
expect.
So I checked all the other voltages in the amp and compared with the
theoretical values; most readings were about 10 % higher on the
schematic. The DC supply 3,5 V too high, R 721 was to warm and the
voltage drop 17 V rather than 14V, etc.
So I measured the our main AC line. The reading was 226 V rather than
220V, then I went to several the neighbours and measured;idem.
Same procedure a few hours later, readings were at 230V.
There was only one thing to do, set the unit to 240 V. All readings
fell back to the theoreticals values on the schematic.
I guess a delta of 10 V puts many components under unecessary stress.
I believe some of the technical gurus can comment on this.
Cheers
Robin

This post is made possible by the generous support of people like you and our sponsors:

Parts Connexion

Topic - AC lines in Belgium - chj9183 08:34:25 06/18/00 (5)

First,... - Victor Khomenko 18:56:59 06/18/00 (0)

Re: AC lines in Belgium - max 09:14:31 06/18/00 (1)

Re: AC lines in Belgium - CE 11:40:43 06/18/00 (0)

Re: AC lines in Belgium - Capt. Z 09:09:13 06/18/00 (1)

It is defenitlly 230V! - I also live in Belgium (NT) - svokke@hotmail.com 10:02:24 06/18/00 (0)

You can not post to an archived thread.