But this is only in Polish, this transformer has no amorphous core as far as I can see but looks interesting.
It can be translated easily online. Please translate into English. Every translation is made into English and then in the desired language, so the first translation is better.
Ogonowski transformers are known to be very nice sounding.
LE
I found it’s website: http://www.ogonowski.eu/transformatoren/single-ended-eintakt/lo-se50-1/
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what you means : "I have seen swapped cores at Lundahl, Tribute , Monolith Magnetics"??
btw mine il loved from all....low R primary 70Ohm ,ind 33H ,sec 0,1Ohm tne number is there
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I not understand the specifications. of this transformer. 50W? At which frequency, which bias current and anode voltage.
500mA maximum, bias current? -3dB at full power? (how much power?).
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You have a 6c33 transformer with a primary Rdc of 70 Ohm? Wow, you loose a lot power in the transformer . Better is a ratio 1:10 to 1:20* so Ri of a 6c33 is about 100 Ohm so your transformer should have about 5 - 10 Ohm Rdc . But maybe you mean 7 Ohms?
With swapping i mean that a manufacurer use the same bobbin with the same windings for different cores. Not a good idea.
* i prefer > 1:20
70 Ohm on 5k iron I haved write before that's for 300bxls !
Can you prove that's or is only suspection for all tre top otp??
Well in the previous post you wrote 5kg not 5k Ohm. So don't blame me for misunderstanding you.
There is a lot of physics in a transformer. You can find out if yours is at basic level or even better.
You can measure your frequency response at low output level, 0,1W, 1 Watt and 10W (or maximum power) .
Post it here.
btw, just frequency response is just a start but it shows if a manufacturer knows what he is doing
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yep 5kg on 300bxls at 5k load .....
I repeat the questions , Can you prove that's or is only suspection for all tre top otp??
That’s not a frequency response and btw is this a 100Hz, 1000Hz, 4592Hz squarewave?
First, this is not a transformer with a amorphous core.
I know this test, it's from an event at the Triode Festival.
The test set-up they used is wrong so this measurements you can put in the trash bin.
I know this test, it's from an event at the Triode Festival.
The test set-up they used is wrong so this measurements you can put in the trash bin.
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I would like to see something tested with a real tube or ccs.
Test with KT88 triodemode
Test with KT88 triodemode
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What I heard, if you would like to go with Amorphous or similar core, in order not to "lose" the low, you need bigger core...
That could be 1 of the solutions.
More importand is to know the weak point of the amorphous core.
Amorphous core has lower stacking factor and lower Bmax, no problem for mid and highs but for a full BW application does not bring much, better use it for mid-high where it could shine. Those who care about the transformer related harmonics above 8kHz better look closer at the dielectric properties and build up of the coil. In case you want full audio BW and high power you better forget about amourphous because you will need more of it and may run into troubles with "bigger", bigger is certainly not better when it relates to coils and high frequencies. So, regarding high power, full Bw, at the higher end of the spectrum, what you win with the core you easely loose in the coil. Anyway, if transformer core distortion is a major concern, lowest possible source impedance (including winding Rac) with sufficent reactive current supply is of vital importance.
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I really can propose with no reservation this local guy who got knowledge, experience and amazing quality as we as very open minded and open to customisable work.
https://www.thermioniclab.com/
https://www.thermioniclab.com/