audio-talk

Does this help?
https://www.sowter.co.uk/rectifier-tran ... lation.php

Blore Edwards currently offering 10% off for Black Friday
promo code 'Black10' - I think its only today and tomorrow
I did a quick test and it did knock 10% off at checkout on a LL1627AM

Ok, I will try 5687 and *sn7 with the 9063 and report back.
Thanks for the suggestion
Will not be soon though as I don’t have any space at the moment.

BTW, the 9063 is on the Sowter homepage as one of the transformers they are prioritising, not sure what that means but maybe they are still available.

Just one thing to consider from your post Max. *sn7 is not that far from a 5687 (lower transconductance, but not that big a deal in this case), so I would consider using that to drive that interstage as well. *bx7 is closer to a 5687, but don't rule the sn7 out. Especially in conditions where you ...

This post is mostly for my own benefit to get things straight in my head...

IT or cap-coupled from input to driver?

There's a reason why Karna Kay is cap-coupled between input and driver - it's going to be difficult to find an interstage transformer that will perform well when driven by *sn7 ...

You might have to build up neck muscles and your internal organs would be moving more than you're used to - depending how much G you're used to pulling.

Car or bike
Car with a bike engine.


The reason I asked (and it seems like you are well past the stage where this will be news to you, but might be of interest to some on here...) is that it makes quite a lot of difference when applying auto-shift to an existing manual gearbox.

A typical 4 ...

So does it have a 'bike-type' gear box - sequential shift rotating a barrel which controls the dogs?

Nick wrote: Wed Nov 20, 2024 4:31 pm Oh, I can be as incompetent as the next. Don't get me started on the pneumatic gear shift system I am helping to build. Blind leading the blind would be the description of that

Car or bike?

With a 1:1 transformer, you can also do the GEC trick of adding coupling capacitors from input to output. Why bother? Because it can tame the transformer's HF resonance but you still have the advantage of large voltage swing.


I've always thought of bifilar windings as a very low distortion ...

Sorry to hear that Ray. I'm sure your positive attitude and your level of fitness will work in your favour. Good luck with the next steps.

Dohhhh!
Of course....damn you're good

The problem with bifilar choke is that you are adding capacitance coupling voltage between the two anodes, what you want with a push pull stage is coupling the current between the anodes (but in reverse).

Also using bifilar chokes would limit the differential voltage swing on the two windings to ...

I have used LL1667 lundahls for CT (or push-pull) anode chokes. Stephen mentioned Kevin Carter, and that is also where I first saw this.
Lundahl allow you to specify a custom air gap. For push-pull, if you're confident that the two sections of your 6sn7 (or whatever you are using at the input) are ...