diyAudio

diyAudio (http://www.diyaudio.com/forums/)
-   Tubes / Valves (http://www.diyaudio.com/forums/tubes-valves/)
-   -   Impedance problem Of O/P Transformer (http://www.diyaudio.com/forums/tubes-valves/187127-impedance-problem-o-p-transformer.html)

renjiish 15th April 2011 09:55 PM

Impedance problem Of O/P Transformer
 
1 Attachment(s)
Hi All
I have a question about the output transformer input impedance. I have an old Philips EL3527 Tape recorder. I have removed the o/p transformer and measured primary impedance and secondary was loaded with an eight ohm resistor. The impedance curve and the data are attached.
Can I consider the impedance of this transformer as 11kOhm (at 1kHz) or 2.2kOhm (at 50 Hz).
Please help.
Renjish

scott17 15th April 2011 10:59 PM

Check out this article: Output Transformer Impedance

DF96 15th April 2011 11:18 PM

You can consider it as 11k, with an LF limit of around 300Hz. However, given its age, it is more likely to be intended for a 3-4ohm load, so 4-5.5K down to 120-150Hz. This is a better fit with the ECL82 output valve, and the likely frequency response.


All times are GMT. The time now is 04:23 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio


Content Relevant URLs by vBSEO 3.3.2