Anyone care to express an opinion on this output Transformer

Shoog · 27th September 2005, 06:51 PM

Hi there,
I found these transformer at Maplin. Was wondering if they were any good ??

http://www.maplin.co.uk/Module.aspx?...46773&doy=27m9

At £22.00 they look to good to be true.

Shoog

Geek · 27th September 2005, 06:57 PM

A buddy of mine has used them. He compared performance to the Hammond 125 series.

rdf · 27th September 2005, 07:04 PM

Wow, and available in Serial ATA format too!

alexistheo · 27th September 2005, 07:43 PM

perhaps the bandwidth should be measured in MB/sec instead of Hz...

nickds1 · 27th September 2005, 07:57 PM

They do a nice cheap mains trafo too...

Shoog · 28th September 2005, 08:39 PM

So judging by the specs of the Hammond 125 series, it not really worth considering for a serious project.
I never noticed the picture was wrong, I just thought it was a really unusual design for a transformer.

Shoog

EC8010 · 28th September 2005, 09:00 PM

I'm afraid that as far as output transformers are concerned, bigger really is better.

richwalters · 28th September 2005, 09:06 PM

Rubbish...used 'em in a Mullard 20 watt and found oscillation problems.....Had to reduce nfb by 6dB.

richjRubbish

EC8010 · 28th September 2005, 10:57 PM

Quote:

Originally posted by richwalters
Rubbish...used 'em in a Mullard 20 watt and found oscillation problems.....Had to reduce nfb by 6dB.

That might be a little unkind. Remember that feedback compensation networks are invariable specific to the output transformer and its usage.

Geek · 29th September 2005, 01:04 AM

Gentlemen,

Just because something is small with less than Hi-Fi specifications, doesn't mean it's poor. If it sounds good, Great!

There's a lot of bad sounding things on the market with great specs and a lot of great sounding things that are lousy on paper.

One of the finest truism's I have read came from member BHD, "There are lies, damn lies and specs."

If *you* like the sound, go for it! But there's only one way to find out

Cheers!

27th September 2005, 06:51 PM	#1
Shoog diyAudio Member Join Date: Aug 2002 Location: Eire	Anyone care to express an opinion on this output Transformer Hi there, I found these transformer at Maplin. Was wondering if they were any good ?? http://www.maplin.co.uk/Module.aspx?...46773&doy=27m9 At £22.00 they look to good to be true. Shoog

27th September 2005, 07:57 PM	#5
nickds1 diyAudio Member Join Date: Aug 2005	They do a nice cheap mains trafo too... __________________ Nicko "The whole plan hinged upon the natural curiosity of potatoes" - S. Lem

28th September 2005, 09:00 PM	#7
EC8010 diyAudio Moderator Join Date: Jan 2003 Location: Near London. UK	I'm afraid that as far as output transformers are concerned, bigger really is better. __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...

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27th September 2005, 06:57 PM	#2
Geek diyAudio Member Join Date: Sep 2004	A buddy of mine has used them. He compared performance to the Hammond 125 series.

27th September 2005, 07:04 PM	#3
rdf diyAudio Member Join Date: Jun 2004 Location: big smoke	Wow, and available in Serial ATA format too!

27th September 2005, 07:43 PM	#4
alexistheo diyAudio Member Join Date: Jun 2004 Location: New York City	perhaps the bandwidth should be measured in MB/sec instead of Hz...

28th September 2005, 08:39 PM	#6
Shoog diyAudio Member Join Date: Aug 2002 Location: Eire	So judging by the specs of the Hammond 125 series, it not really worth considering for a serious project. I never noticed the picture was wrong, I just thought it was a really unusual design for a transformer. Shoog

28th September 2005, 09:06 PM	#8
richwalters diyAudio Member Join Date: Sep 2003 Location: Alps:Tube amp designs over 150W, SMPS guru.	Rubbish...used 'em in a Mullard 20 watt and found oscillation problems.....Had to reduce nfb by 6dB. richjRubbish

29th September 2005, 01:04 AM	#10
Geek diyAudio Member Join Date: Sep 2004	Gentlemen, Just because something is small with less than Hi-Fi specifications, doesn't mean it's poor. If it sounds good, Great! There's a lot of bad sounding things on the market with great specs and a lot of great sounding things that are lousy on paper. One of the finest truism's I have read came from member BHD, "There are lies, damn lies and specs." If you like the sound, go for it! But there's only one way to find out Cheers!

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