Giantkiller moves forward into Full Heterodyning.

[turbo]

@IS,
Dude get the classification right. Gotta be class 'A'! You could have class A/B. Find out...

--giantkiller.

hi
i do not think it has to be class A.
if the drive is a pulsed DC it could also work with the other classes.

M.

[bolt]

IS your new amps have a block IC bolted to the heatsink its NOT a mosfet and so no chance of lifting it much over 20k.  My original concept was to use the XR2206 gens as they give very good sine from 0.1Hz to over 1 meg then use a class A mosfet amp which is a MUST for very low distortion and the IRF range of mosfets are quite capable of going to 20 megs in an RF circuit should therefore cover the 1 meg of the XR's very easily if the layout is good. However we still dont know for sure what frequencies are required to make the tpu work but there is now compelling evidence that we need to go up several megs on at least one of the frequencies which means of course need to build RF oscillators and amps too to cover the top end. Ideally need 3 very expensive lab sig gens that will cover something like 1Hz to 100 megs then we can really see what frequencies will produce any special effects we are all seeking.

IMO its not pulses thats been tried for over a year now and nothing has happened. Pulses creates harmonics all over the place which produce a mush of noise as well as very dangerous EMP, shocks and other nasties that are not seen in any real tpu. It doesn't make any sense to me technically either to use this method.  Therefore the only alternative is pure sine minimal harmonics and purity as SM very clearly points out in his notes. ie the strike of the right chord. SM describes the tpu as a type of radio and tubes work better at making low harmonics and very wide bandwidth. I used EL84 tubes on 10 meters before and they work just but no problem down at 40 and 80 meters. However tubes still will NOT help we don't know to build a self resonating RF circuit or sine waves in the lower frequency range so rushing out and buying tubes in my opinion still does not solve anything. So without access to lab stuff it makes building and testing a tpu very difficult. Once we go to RF most scopes die and then you need RF frequncy counters, sniffers and RF spectrum analyzers etc which cost a fortune. Despite the fact the final circuit is no doubt very small and simple its pi$$ing in the dark to have no idea what frequencies will produce the required effects otherwise no idea to build VCO PLL Xtal controlled AFC AGC Cmos dividers or what the heck ends up on the little 1 inch bit of pcb in the final version.

So the only way is for someone here to have access to this stuff at work or a uni lab and can state they seen very interesting effects at XYZ frequencies that relate to a ratio that makes sense so that the low cost builders have a chance to replicate the effects so IS you can see that buying a couple of car amps of the market is light years away from making a tpu and further still if you don't even have the 3 XR sig gens available.

[turbo]

Why is everybody making it so F*cking difficult?
@Bolt yes pulsed DC square waves do what you say, but pulsed DC with a slope doesn't.
You can see this by simply rectifying a AC signal and fed it into a transformer.
Then it is a pulsed DC signal but not a square one.
It's no big deal really.

Also the people who are thinking this can only be done with $$$$ expensive lab equipment are wrong.
The circuit contains a hand full of parts and that's it.
It has to be as simple as that, beyond our imagination.
Some people are drowning in their own thoughts.
Just take a step back and watch the fog fade away and you will see the picture more clearly.

Pherhaps the most important thing here is THINK SIMPLE.

M.

[giantkiller]

By playing with the heterodyning I believe the thumping / vibration is a chord vibrato effect happening magnetically.
The setup I have been working on clarified this to me. I now have 3 ad826's on a board. These are dual opamps. The bottom half 3 will drive the coils. The top half 3 will drive the audio. I want to know whats inside.
The vinyl bucket softens the echoing while emitting a nice rich sound when at the vibrato frequencies. I now have a semi acoustic laser or just a vinyl speaker box. I can produce thumping or waves. Actually pretty cool. Nothing new if anyone has played with acoustics or audio generation. So I progress to the next step. Open source all the way.

I will get stages done to safely satisfy my curiosity. I am in no way engaging others to follow suite. The applications that have come out of this so far are mind boggling. So as I build the front end controls I am actually making sequential steps through the operation. Front to back. Just look at the immense amount of specifications that have unfolded. I have the controls in place to practice with these. I will eventually put the exploding pop can driver on the back end in triplicate.

I just had another fire. Later...

--giantkiller.

[innovation_station]

well the new amps i have were verry cheep so no loss i will find a use 4 them 

so tube amps then im just about sick of ss i have ordered the 3 sig gennys im going to build gk controler board for my rack and also i will order the 3 fet amps too  but i want tubes and a tube rack

@bolt are the unknowen freqs that important?

what i mean is can we find them later on so for a tube amp it must be capable of amping the high freq and the highest quoted freq was 245k but the harmonics of this frq will reach into the megs

so mannix bolt and marco

what kind of tube amp  will work? i was going to buy a amp today from the gutair shop that is a push and pull amp for a mic a vocoal amp with no distortaion or reverb or any fancy shit

but i have a question about the amps can we use a verry good tube pre amp if so i found a real simple one here is the link

ist

http://diyaudioprojects.com/Tubes/12AX7_Preamp/