Great MC intro. I didn't know any MC cartridge specifics because I couldn't afford one or the transformer in high school around 1980. I wore my grooves down with a V15 Type IV. Thanks for the video, look forward to your upcoming in-depths.
To clarify a DC voltage will of course build up magnetic flux in the transformer circuit, at the instantaneous moment the voltage is applied the secondary will output a voltage, as it will have a voltage induced when the magnetic circuit collapses as the voltage is removed. This is why AC works, the flux needs to be 'building and collapsing' in the secondary circuit for induction to occur. Push pull valve amps see the reflected load, the transformer has DC but it is balanced and opposite though each tube to ensure the transformer doesn't saturate. EDIT: Oop's sorry I should have started with my appreciation for a very nice series. Thank you.
hooked on moving coil carts(denon dl301). cleaner and less coloured sound. i use a modified mic stage before the phono stage. denon had a rather pricey step up transformer for sale of at the time. that's why i opted for and active step-up stage. the entire build was less that 3 percent of what that transformer was at the time. that cart was purchased in '86 and is still in great shape.
there was also a denon dl110 which is a high output moving oil cartridge. there's one for sale on flea bay for under 200 bucks at the time i post this. iirc ar had a companion tube pre-amp that was a suggested match to the ar1 turntable we both own(and where the dl301 resides). it was a tube unit but at the time the budget didn't allow after the purchase of the table/arm/cart combo. picked it all up at ear food in winchester va.
Thanks for a really good video. Could you go a little more in depth regarding Ringing & Damping. At rothwellaudio it says the following "Fortunately, ringing can be totally eliminated without sacrificing signal level by loading the secondary winding correctly with a resistor-capacitor network, not a simple resistor (though far too many commercial step-up transformers totally neglect this). Although lower values of resistive load on the secondary do tend to reduce ringing, as illustrated above, loading with a correctly optimized resistor / capacitor network will produce far superior results ".
In your video, you can get the impression that you only need a resistor in parallel with the secondary winding to get the best result. It could be an idea for a new video, to show how to use the function generator and a oscilloscopes on a Step Up Transformers to see ringing and how to find the right capacitor and resistor. I myself have purchased a Capacitor Substitution Box and some variable resistors, but I am not quite sure how to set it up. Thanks again for the great videos you make :)
I have just purchased a Bryston TF1 step up transformer and though it sounds good at the factory setting of 22dbs, apparently I need it to be set to the setting of 16 dbs and 40-250 ohms for optimal sound with my Rega Ania Pro MC cartridge. Is this something difficult for an authorized shop to do? Apparently the pins have to be soldered at a different place for this.
I just got a lowrey amp with a step down 220/110 t. f. I did not know that when I bought it. Lowrey lsa. Is there anything I should be aware of or any safety issues that would be different than a regular power transformer. Is it even worth wasting my time or would you say leave it alone. I am older but kinda new to amp building. I thank you in advance for any ideas you might share.
thank you for your interesting videos I have recently got a bee in my bonnet about building my own HIFI gear from scratch and I have enjoyed you reading schematics series First off I want to build a turntable so the moving coil transformer is something I want to wind from scratch I understand (i think) your comments about high permiability of the core but if you could help with a few links of what cores would be suitable . Are we talking about powder toroids ? what size is a MC transformer generally ( notwithstanding the turns ratio required) would something like this attached link be suitable ? What core material are you going to use? www.mag-inc.com/Media/Magnetics/Datasheets/C055250A2.pdf One further request could you also address the output transformer in the same thorough way kind regards Clive UK
Very helpful and educational. Most welcome and inspiring teacher, thankyou.
Great MC intro. I didn't know any MC cartridge specifics because I couldn't afford one or the transformer in high school around 1980. I wore my grooves down with a V15 Type IV. Thanks for the video, look forward to your upcoming in-depths.
Great subject! Looking forward to upcoming parts.
Thank you for this video. It has been quite enlightening.
To clarify a DC voltage will of course build up magnetic flux in the transformer circuit, at the instantaneous moment the voltage is applied the secondary will output a voltage, as it will have a voltage induced when the magnetic circuit collapses as the voltage is removed. This is why AC works, the flux needs to be 'building and collapsing' in the secondary circuit for induction to occur. Push pull valve amps see the reflected load, the transformer has DC but it is balanced and opposite though each tube to ensure the transformer doesn't saturate. EDIT: Oop's sorry I should have started with my appreciation for a very nice series. Thank you.
hooked on moving coil carts(denon dl301). cleaner and less coloured sound. i use a modified mic stage before the phono stage. denon had a rather pricey step up transformer for sale of at the time. that's why i opted for and active step-up stage. the entire build was less that 3 percent of what that transformer was at the time. that cart was purchased in '86 and is still in great shape.
there was also a denon dl110 which is a high output moving oil cartridge. there's one for sale on flea bay for under 200 bucks at the time i post this. iirc ar had a companion tube pre-amp that was a suggested match to the ar1 turntable we both own(and where the dl301 resides). it was a tube unit but at the time the budget didn't allow after the purchase of the table/arm/cart combo. picked it all up at ear food in winchester va.
Thanks for a really good video. Could you go a little more in depth regarding Ringing & Damping. At rothwellaudio it says the following "Fortunately, ringing can be totally eliminated without sacrificing signal level by loading the secondary winding correctly with a resistor-capacitor network, not a simple resistor (though far too many commercial step-up transformers totally neglect this). Although lower values of resistive load on the secondary do tend to reduce ringing, as illustrated above, loading with a correctly optimized resistor / capacitor network will produce far superior results ".
In your video, you can get the impression that you only need a resistor in parallel with the secondary winding to get the best result.
It could be an idea for a new video, to show how to use the function generator and a oscilloscopes on a Step Up Transformers to see ringing and how to find the right capacitor and resistor. I myself have purchased a Capacitor Substitution Box and some variable resistors, but I am not quite sure how to set it up.
Thanks again for the great videos you make :)
Look forward to a video that goes "way deep" into impedance. Hope your "reluctance" does not impede. ;)
I have just purchased a Bryston TF1 step up transformer and though it sounds good at the factory setting of 22dbs, apparently I need it to be set to the setting of 16 dbs and 40-250 ohms for optimal sound with my Rega Ania Pro MC cartridge. Is this something difficult for an authorized shop to do? Apparently the pins have to be soldered at a different place for this.
I just got a lowrey amp with a step down 220/110 t. f. I did not know that when I bought it. Lowrey lsa. Is there anything I should be aware of or any safety issues that would be different than a regular power transformer. Is it even worth wasting my time or would you say leave it alone. I am older but kinda new to amp building. I thank you in advance for any ideas you might share.
Why step the mc to mm amplifier and not just line level
Thank you, very well stated - ( i understood it) thanks
thank you for your interesting videos
I have recently got a bee in my bonnet about building my own HIFI gear from scratch and I have enjoyed you reading schematics series
First off I want to build a turntable so the moving coil transformer is something I want to wind from scratch
I understand (i think) your comments about high permiability of the core but if you could help with a few links of what cores would be suitable . Are we talking about powder toroids ? what size is a MC transformer generally ( notwithstanding the turns ratio required)
would something like this attached link be suitable ? What core material are you going to use?
www.mag-inc.com/Media/Magnetics/Datasheets/C055250A2.pdf
One further request could you also address the output transformer in the same thorough way
kind regards
Clive UK
I find it odd only 14 comments. Well 15 now. Slight step up. 😂
lot of ground loops