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1  Ceriatone / Overtone / Re: Transformers on: April 18, 2010, 10:41:05 AM
Hi,
http://ceriatoneforum.com/index.php?topic=971.0

Topic: Westlabs built for Matchless to their specs VS Ceriatone Output Transformer
2  Muchless / DC 30 / Re: 12 Vd for a fan on: August 25, 2009, 09:20:47 AM
I have bought a 220 volt Fan (are not expensive) for my Creme Brulee . Connect it to the 110 volt tap to make it work slower. No need for a transformer.
3  Tw Clones / Rock It! / Re: Rock It! SoundClips on: August 20, 2009, 08:08:29 AM
Here is some noodling...

Thanks for posting this, very tasteful playing. Smiley
4  Custom amp building, Prototypes and other amps / Mods and Tweaks / Re: Westlabs built for Matchless to their specs VS Ceriatone Output Transformer on: April 08, 2009, 07:39:58 PM
Hi tele,

Wouldn't ask you to pull the OT just to measure it.   Which of the two, if either measured up close to the expectation for the power tube configuration in this amp?  Does this amp use two EL84's?   Either way, it comes down to the sound, and you put together a nice comparison. 

thanks for posting


Yes two EL84 PP.
It's the Creme Brulee.
5  Custom amp building, Prototypes and other amps / Mods and Tweaks / Re: Westlabs built for Matchless to their specs VS Ceriatone Output Transformer on: April 07, 2009, 10:43:18 AM
Hello,

The results of your winding ratio and reflected load tests on the two OT's is kind of surprising:

Some technical information.
Westlabs 15 W
21,65 V Primary 1 V secundary.
21,65 x 21,65 = 468,7225 x 8 = 3749

Ceriatone 18W
44,83 V Primary 1 V secundary
44,83 x 44,83 = 2009,7289 x 8 = 16077

I do not have a tone generator, so i only used a Variac.

It looks like both OT's have multiple secondaries (ie can choose 4 or 8, etc).  Just wonder of if you were consistent on the measurements.

thnks




yes, both sec. 8 ohms (The difference in specs surprised me too).
It is always possible that I made a mistake Embarrassed, I could double check but that means disconnecting the OT again (If I have the time I'll double check).
6  Ceriatone / Overtone / Re: Output Transformer on: February 18, 2009, 11:55:27 AM
Very interesting thread indeed !
It will be very nice if you can properly record and post here your sound samples gentlemen. Than we can hear the magic of the “crappie” and mercury OT.
We all be very thankful – please!

Something similar http://ceriatoneforum.com/index.php?topic=971.0
7  Custom amp building, Prototypes and other amps / Mods and Tweaks / Re: Westlabs built for Matchless to their specs VS Ceriatone Output Transformer on: February 09, 2009, 11:10:02 PM
I was hoping to hear no difference at all, being as I have just completed my DC-30 build (its with my tech now getting tested and powered up), but unfortunately that was not the case. The last clip was the clincher.
The DC30 has a different OT (30W) than the Creme Brulee (18W), so I'm not sure if you would hear the same difference in sound.
8  Custom amp building, Prototypes and other amps / Mods and Tweaks / Re: Westlabs built for Matchless to their specs VS Ceriatone Output Transformer on: February 09, 2009, 10:59:41 PM
The Westlabs OT is definitely more open with nicer high end detail and more bass as well.
Ceriatone OT sounds somehow congested I would say.

The test setup was the same for both OTs, right?... same amp, tubes, settings...

yes, same amp, tubes etc. I was a bit surprised the first time I played the amp with the Westlabs, the sound was totally clean when in contrast the Ceriatone had already quit a bit of breakup with the same settings.
So the only thing that is different is more volume from the preamp to get the same amount of breakup.

What also surprised me is the difference in primary impedance?
9  Custom amp building, Prototypes and other amps / Discussion / Re: Ceriatone Transformers on: February 07, 2009, 11:48:29 PM
Hi,

take a look here http://ceriatoneforum.com/index.php?topic=971.0

Robert
10  Custom amp building, Prototypes and other amps / Mods and Tweaks / Westlabs built for Matchless to their specs VS Ceriatone Output Transformer on: February 07, 2009, 06:11:03 PM
Hi,

I Have put some sound clips on youtube comparing the two.





Let me know what you think......
Every video has 2 parts with P1 Ceriatone P2 Westlabs

Some technical information.
Westlabs 15 W
21,65 V Primary 1 V secundary.
21,65 x 21,65 = 468,7225 x 8 = 3749

Ceriatone 18W
44,83 V Primary 1 V secundary
44,83 x 44,83 = 2009,7289 x 8 = 16077

I do not have a tone generator, so i only used a Variac.

See http://akavalve.blogspot.com/2008/12/champion-600-output-transformer.html (not my blog)

Regards Robert.
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