noDAC DHT output stage
 User Name Stay logged in? Password
 Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read Search

 Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

 Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
 6th March 2019, 11:38 PM #41 Hearinspace   diyAudio Member   Join Date: Jun 2008 Thanks !
 7th March 2019, 10:55 AM #42 merlin el mago   diyAudio Member     Join Date: Sep 2009 Location: Catalonia - Europe You're welcome. @ abraxalito Done the filter yesterday and enjoyed all the evening & night listening music, a big thanks again. About step up transformers I guess I need 1:1.27 my calculations: 0.56Vrms = 1.58Vpp 0.71Vrms = 2Vpp So I need to increase 0.15Vrms to reach the 2Vpp, it's OK. Also I need an OPT with primary impedance of 50 Ohm & a secondary of 63.5 Ohm Are my calculations OK?
 15th March 2019, 10:06 PM #43 merlin el mago   diyAudio Member     Join Date: Sep 2009 Location: Catalonia - Europe Nobody?
Tjj226
diyAudio Member

Join Date: Dec 2012
Quote:
 Originally Posted by merlin el mago You're welcome. @ abraxalito Done the filter yesterday and enjoyed all the evening & night listening music, a big thanks again. About step up transformers I guess I need 1:1.27 my calculations: 0.56Vrms = 1.58Vpp 0.71Vrms = 2Vpp So I need to increase 0.15Vrms to reach the 2Vpp, it's OK. Also I need an OPT with primary impedance of 50 Ohm & a secondary of 63.5 Ohm Are my calculations OK?
Are you sure you want 2vpp? Most digital signal sources are 2v RMS.

I would just go with a plain old 1:2 step up transformer. That would give you 1v rms out.

 15th March 2019, 11:53 PM #45 merlin el mago   diyAudio Member     Join Date: Sep 2009 Location: Catalonia - Europe I'm sorry yes for 2Vrms, so I will need 1:4 ratio, primary 50 ohms & secondary 200 ohms, that's? Last edited by merlin el mago; 15th March 2019 at 11:57 PM.
 16th March 2019, 12:33 AM #46 kokoriantz   diyAudio Member   Join Date: Dec 2015 Location: south east asia The impedance ratio is the square of the transformer's winding ratio . Most ready made transformers for audio are 600 ohms . What you need is 600:10k . See on Aliexpress .
merlin el mago
diyAudio Member

Join Date: Sep 2009
Location: Catalonia - Europe
Quote:
 Originally Posted by kokoriantz The impedance ratio is the square of the transformer's winding ratio . Most ready made transformers for audio are 600 ohms . What you need is 600:10k . See on Aliexpress .
Yes I forgot thanks, I need a primary impedance of 50 ohms because is the output impedance of Amanero and the input/output impedance of the 4th order low pass filter so I need a custom made OPT 50:833 ohms 1:16 ratio?

What have I to look for: Line input transformer or Step-up MC transformer?

Last edited by merlin el mago; 16th March 2019 at 11:31 AM.

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Site     Site Announcements     Forum Problems Amplifiers     Solid State     Pass Labs     Tubes / Valves     Chip Amps     Class D     Power Supplies     Headphone Systems Source & Line     Analogue Source     Analog Line Level     Digital Source     Digital Line Level     PC Based Loudspeakers     Multi-Way     Full Range     Subwoofers     Planars & Exotics Live Sound     PA Systems     Instruments and Amps Design & Build     Parts     Equipment & Tools     Construction Tips     Software Tools General Interest     Room Acoustics & Mods     Music     diyAudio.com Articles     Car Audio     Everything Else Member Areas     Introductions     The Lounge     Clubs & Events     In Memoriam The Moving Image Commercial Sector     Swap Meet     Group Buys     The diyAudio Store     Vendor Forums         Vendor's Bazaar         Sonic Craft         Apex Jr         Audio Sector         Acoustic Fun         Chipamp         DIY HiFi Supply         Elekit         Elektor         Mains Cables R Us         Parts Connexion         Planet 10 hifi         Quanghao Audio Design         Siliconray Online Electronics Store         Tubelab     Manufacturers         AKSA         Audio Poutine         Musicaltech         Holton Precision Audio         CSS         exaDevices         Feastrex         GedLee         Head 'n' HiFi - Walter         Heatsink USA         miniDSP         SITO Audio         Twin Audio         Twisted Pear         Wild Burro Audio

 Similar Threads Thread Thread Starter Forum Replies Last Post Presley Digital Line Level 41 19th May 2017 07:07 AM Mihkus Chip Amps 165 8th February 2014 11:14 AM rhythmsandy Solid State 0 13th October 2013 06:03 PM Fusion916 Solid State 1 20th December 2012 05:05 PM AudioGeek Tubes / Valves 2 20th March 2010 01:38 AM

 New To Site? Need Help?

All times are GMT. The time now is 02:21 PM.