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New Budget Output Transformer
New Budget Output Transformer
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Old 23rd November 2020, 05:00 PM   #11
K.A.B is offline K.A.B  Sweden
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Due to the more expensive shipping and custom fees Lundahl opt are more tempting too buy.
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Old 23rd November 2020, 05:24 PM   #12
Windcrest77 is offline Windcrest77  United States
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Those prices are so low, im skeptical how they actually make a profit. It would be interesting to do some A B C comparison testing using the same amp, by swapping out with equivalent Hammond and Edcor and Antek units and printing off the same tests for each, and recording some MP3 files of each model through a dummy load to hear anything different.
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Old 23rd November 2020, 06:48 PM   #13
mike567 is offline mike567  United States
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I have bought from Matt. There is no 8 week wait. This dude ships fast!
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Old 23rd November 2020, 07:01 PM   #14
astouffer is offline astouffer  United States
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While on the subject of cheap transformers these caught my eye 1pair 3.5K Amorphous Single-ended Output Transformer for 6P6P KT66 2A3 tube amp | eBay
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Old 23rd November 2020, 07:44 PM   #15
wrenchone is offline wrenchone  United States
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I dunno - using a conductive house clamp around the coil doesn't look like a good idea...
Correction - they're using the hose clamp to hold the cores together, and that's OK.

I've been wanting to try some transformers from MPS for a while. I have one of their power transformers, and I may pony up for a pair of the 5k HiFi SE transformers

Last edited by wrenchone; 23rd November 2020 at 07:48 PM.
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Old 23rd November 2020, 07:46 PM   #16
Windcrest77 is offline Windcrest77  United States
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Quote:
Originally Posted by astouffer View Post
While on the subject of cheap transformers these caught my eye 1pair 3.5K Amorphous Single-ended Output Transformer for 6P6P KT66 2A3 tube amp | eBay
Interesting it says double C core but I only see one core. I like the ingenuity and resourcefulness though the guy re-using the cores.
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Old 24th November 2020, 04:33 AM   #17
6A3sUMMER is offline 6A3sUMMER  United States
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The link says Amorphous.
Then it says:
"The use of imported second-hand amorphous alloy sheet winding"

I never knew that a sheet of material was 'amorphous'.
Perhaps something lost in the translation from Chinese to English.

I am not a materials expert.
But I never desired to purchase any amorphous core.
I missed that boat of opportunity.
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Old 24th November 2020, 06:50 AM   #18
50AE is offline 50AE  Bulgaria
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New Budget Output Transformer
It looks like genuine amorphous core, although I wouldn't by this. Looks like a 1W OPT @25Hz core at best. This is why it's cheap
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Old 24th November 2020, 08:38 PM   #19
Wavebourn is online now Wavebourn  United States
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Originally Posted by 50AE View Post
It looks like genuine amorphous core, although I wouldn't by this. Looks like a 1W OPT @25Hz core at best. This is why it's cheap
And you are right. I bought and measured them. You do not need 25 Hz from a small amp, so for 2-3W it would be good.
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Old 29th November 2020, 02:37 PM   #20
drteming is offline drteming  United States
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Got the spud amp built, 3.5W output. The -3dB points are at 30 Hz and 30 kHz, though there is a bit of distortion under 40 Hz. The tubes are 6T9 so it's semi-comparable to my 6SL7/6V6 SE amp with Edcor GXSE-10 OTs. At similar volume, I can't tell any significant differences.
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