Transformers - Winding/Wiring Questions

[bubbazanetti]

You could experiment by connecting the FB to the cathode and the 0v to the cathode resistor (lower value?). i.e. in series with the resistor.
One thread I read suggested that this increases the output power, which you can speculate is because the cathode current is flowing through the winding on its way to the anode and otp primary?


i found some comments re cathode feedback windings

[FONT=MS Sans Serif, Microsoft Sans Serif]These will help generate very high quality bass response unheard from conventional SE amp since the controlled motion of woofer is greatly increased. Minuet, therefore, redefines superb bass response (thus enhances full body) along with its excellent midrange and high frequency response. [/FONT]
[FONT=MS Sans Serif, Microsoft Sans Serif]Additional benefits of using cathode feedback circuit are:
1) Lowering output impedance
2) Increasing Damping factor
3) Extending frequency response at both ends of audio spectrum[/FONT]
[FONT=MS Sans Serif, Microsoft Sans Serif]
[/FONT]
[FONT=MS Sans Serif, Microsoft Sans Serif]http://www.sacthailand.com/AmpMinuetEL34.html
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I'm pretty new to this so I think i'll stick till the schematic until I begin to understand things a bit better. Thanks for the suggestions though!

 

[bubbazanetti]

Let me move this back to the front of the queue for an additional question;



The schematic I'm working off of shows the amp wired for triode but notes that fitting a switch to run UL is easy if you have a UL tap, which I do. I found some documentation that the transformer's UL tap is 46 percent but the schematic calls for 43 percent. Is this close enough or do I need to bring it down a bit.



While I got you here, I assume that by "46 percent" they mean "of the primary" correct?