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best input tx for JC Morrison DA100 amp design sim.

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Posted on November 2, 2016 at 00:11:27
shane.
Audiophile

Posts: 332
Location: S.A.
Joined: March 27, 2004



http://www.diyaudio.com/forums/tubes-valves/298650-3-stage-dc-any-thoughts.html

www.lundahl.se/wp-content/uploads/datasheets/1570_0xl.pdf

??

Speculation wrt tx capacities (all oft them) and limit on HF also LF resonance concerns. Please and thank you.


Shane


 

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RE: best input tx for JC Morrison DA100 amp design sim. , posted on November 2, 2016 at 06:51:19
KevinC
Manufacturer

Posts: 2911
Location: NC
Joined: April 19, 2001
If you desire a 1:1 input transformer, then the next question is whether you need a "high" impedance input transformer (example LL1592) because your driving impedance is highish (1K-3Kohms), or a lower impedance transformer (like the LL1570, etc.) which is appropriate to a 600ohmish driving impedance.

The frequency response of either of these is as given in the data sheets, assuming the driving impedances specified in the data sheet test conditions. If the absence of high frequency resonances in required, then use the suggested terminating networks in the data sheet.

Kevin Carter
K&K Audio
www.kandkaudio.com

 

RE: best input tx for JC Morrison DA100 amp design sim. , posted on November 3, 2016 at 23:19:17
shane.
Audiophile

Posts: 332
Location: S.A.
Joined: March 27, 2004
Thanks Kevin.

At the lowest usable frequency drive impedance would be approximate to 200 ohms, so that is settled easily.

Regards,
Shane

 

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