What do you see in the FTPU image?

[Spider]

I see two tweeters with bifilar voicecoils gleud together at the magnets.


Spider

[wattsup]

@Grumpy

Looko at the photos here about the center base of ftpu.
http://www.purco.qc.ca/ftp/Steven%20Mark/micrphone/

All this has ben covered and covered so many times.

@otto

Yes, according to my current study there are two small black transistors in front of what we call EMs capacitor (which is to the right of the toroid). You can see three wires going to the transistors, one from the toroid and two from the outer ring windings and the leads from EMs cap.

Behind the toroid is a second capacitor and two or three other components plus I would say a 1/2 amp resistor. So what SM said about no electronics is not true. Otherwise why did he make so much effort to hide the circuit side of the ftpu each time he moved it, turned it over, etc.

@EM

That is not tape over the windings. If so it would have been much more reflective as you can see the four taped positions to hold the outer ring to the spool rim.

Too bad Jack Durban never came back with his beta copy.

Added:
Too bad we cannot travel back in time, or can we? lol
http://www.radioshackcatalogs.com/catalog_directory.html
Click the 1939 catalog - amazing what they had back then.

[bolt]

"So what SM said about no electronics is not true."


He never said that at all he said simple electronics no mass circuitry.

That allows for 2 or 3 transistors couple of caps etc which is enough to make a tpu. It certainly doesn't need micro processor timing controls etc. Its very simple construction rather like a radio as SM said which is true if you know how to extract Radiant Energy.

[wattsup]

"So what SM said about no electronics is not true."


He never said that at all he said simple electronics no mass circuitry.

That allows for 2 or 3 transistors couple of caps etc which is enough to make a tpu. It certainly doesn't need micro processor timing controls etc. Its very simple construction rather like a radio as SM said which is true if you know how to extract Radiant Energy.

That would be left to debate but I do agree it is not rocket science SS circuitry.

One thing I have noticed.

The FTPU has finer wire in the center toroid coils and the rings are not that long. The LTPU has thicker wire on the toroid coils and its rings are obviously longer length and providing more potential inductance. So fine wire with short ring, courser wire with long ring. Maybe if you totaled the resistance or impedance or inductance (my EE is not the tops) in both of these combos, they would be the same.

Added:

What I see is the practical sense of things. If SM made the ftpu first, or if you or I made an ftpu first, what would be the major factors, figures, measurements that I would need to scale the same thing up to the LTPU or maybe not so big, let's say up to the 6TPU. What values would have to stay the same and what or which would have to be multiplied? You mentioned somewhere else the 1.618. Can you explain to us in laymen terms what this is?

[darkspeed]

The loose wrapping of ribbon-like material on the two outer edges, doesn't look like electric tap as it is very loose like it does not conform well or stretch, like hi-mu tape...

The torodal overwrap wire over this ribbon material may be the infamous iron delay wire, may just be tricks of lighting...

Why ignor this version now? We are just starting to figure it out... LOL!

I was saying ignore the one in the garage / cardboard box video, as i think it is set up to throw people off the trail.

However I think the one on the wire spool is probably the source of all the best info..

.