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| | |-+  Westlabs built for Matchless to their specs VS Ceriatone Output Transformer		 « previous next »
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Author Topic: Westlabs built for Matchless to their specs VS Ceriatone Output Transformer  (Read 30384 times)
TeleCasterAndTubes
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« 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.
« Last Edit: February 08, 2009, 10:51:00 AM by TeleCasterAndTubes » Logged
erwin_ve
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« Reply #1 on: February 07, 2009, 07:54:54 PM »
Wow that's a nice comparison.
It's difficult to judge by a YT vid, but here's my thoughts.

In all vids the westlab is more articulate and has nicer highs.
The last full power vid clearly shows it's too much for the ceriatone tranny.
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mcinku
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« Reply #2 on: February 09, 2009, 08:29:09 AM »
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...
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hywelg
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« Reply #3 on: February 09, 2009, 09:51:56 AM »
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.
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TeleCasterAndTubes
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« Reply #4 on: February 09, 2009, 10:59:41 PM »
Quote from: mcinku on February 09, 2009, 08:29:09 AM
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?
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TeleCasterAndTubes
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« Reply #5 on: February 09, 2009, 11:10:02 PM »
Quote from: hywelg on February 09, 2009, 09:51:56 AM
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.
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Kitarist
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« Reply #6 on: February 19, 2009, 11:54:39 AM »
The OT does make a difference
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« Reply #7 on: February 19, 2009, 02:10:50 PM »
Very well done, thanks for the comparison.
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sunnydaze
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« Reply #8 on: April 07, 2009, 05:29:35 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
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TeleCasterAndTubes
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« Reply #9 on: April 07, 2009, 10:43:18 AM »
Quote from: sunnydaze on April 07, 2009, 05:29:35 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).
« Last Edit: April 07, 2009, 10:49:54 AM by TeleCasterAndTubes » Logged
sunnydaze
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« Reply #10 on: April 08, 2009, 09:22:18 AM »
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
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TeleCasterAndTubes
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« Reply #11 on: April 08, 2009, 07:39:58 PM »
Quote from: sunnydaze on April 08, 2009, 09:22:18 AM
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.
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