t
er
The iron in the core could rust. Stainless steel isn't much use as a core material.
-- Bill Sloman, Nijmegen
Are you sure it has gone down by 10%? What are you measuring?
John
t
er
are you saying the sec voltage GRADUALLY reduced over 4 years or you just checked now and they are 10% lower then the last time you checked?
Is it one secondary or multiple?
Could be a shorted turn in one of the secondaries?
Mark
Either a shorted turn or a loss of permeability sufficient to drop the output voltage 10% would make the transformer get very hot.
John
t
er
Check voltmeter battery?
On a sunny day (Mon, 21 Dec 2009 09:30:35 -0800 (PST)) it happened Jan Panteltje wrote in :
PS: I see you are in the UK. Some parts of the UK may still be moving from 240V to 230V. Did you check the primary volatge in the past and now?
Transformer volatges are set by the turn ratio. So logic says, if not your voltmeter, then your primary went down too.
Kong the King
Aha! Now we know what caused global warming.
-- SCNR, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
10
that
other
? 300W wouldn't do it, unless perhaps it was all directed at a particularly potent prayer-wheel.-- Bill Sloman, Nijmegen
Yeah, all those rusting transformer laminations. As the world gets warmer, humidity increases and the cores rust faster. That is the long-saught AGW positive feedback mechanism.
That explains the O2 decline, too.
John
"Nutcase _Kook"
** No they are NOT and you have no evidence any such thing has happened.Voltages marked on a PCB are not proof of your wacky assertion.
Quote from same lunatic 2 days ago:
" The one in front of me gives off various voltages and the associated DCs are marked on the overlay (no schematic available). All the DC voltages , amplifier but just quiescent no load, all the actual DC levels are about 10 percent less than the overlay marked DC. "
Go away.
.... Phil
e 10
dd that
e other
e?
At least it is original - just as implausible as ever, but not an explanation I've ever seen on a denialist web-site.
-- Bill Sloman, Nijmegen
that
other
What a grim old fart you have become... unless you always were that way.
John
Looks like you're in the UK.
UK mains voltages fluctuate. 10% isn't unusual, in fact, I believe it's permitted.
AIUI, the UK is having an unusually cold period. Voltages are likely down.
Could explain things. Have you measured the supply voltage? If not, go do it, measure the secondary voltage, calculate the turns ratio then come back and tell us whether you still think the transformer is NG.
--
"Electricity is of two kinds, positive and negative. The difference
is, I presume, that one comes a little more expensive, but is more
durable; the other is a cheaper thing, but the moths get into it."
(Stephen Leacock)
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