White's TR Series 2 mod project.

[dfbowers]

Here is my version. Thanks goes out to smitty2 for doing the layout for me.
Don..

[dfbowers]

Here is my version. Thanks goes out to smitty2 for doing the layout for me.
Don..

Parts list added:

(1) CD4024BE
(1) TL072CP
(1) LM258N

(1) MPSA64 (or 63) Darlington
(1) MPSA13 Darlington
(1) MPS6522 Transistor
(1) LM78L05A 5V regulator

(3) 100uF 16Velectrolytic
(5) .47uF 63V Filmcapacitors
(2) .1uF 63V Film capacitors
(1) .056 63V Film capacitor

(1) 5K trimmer pot
(1) 10K threshold pot (10T multi- turn not required but makes tuning easier)
(1) 56k ohm resistor
(1) 33k ohm resistor
(3) 100k ohmresistors
(2) 4.7k ohmresistors
(1) 1k ohm resistor
(1 ) 1m ohm resistor
(1) 8 to 16 ohmspeaker
(1) 9v Batteryholder/connector
(1) single poleswitch
(1) 1/4" headphone jack
(1) 14 pin IC socket
(2) 8 pin IC Sockets

[ripsdevala]

Don't have mps6522 i put BC558,
mpsa63 with BC327
TL072 with NE5532
So far only beep at start, no sine wave on pin1 4024, *waiting for the parts arrived.

[ivconic]

Don't have mps6522 i put BC558,
mpsa63 with BC327
TL072 with NE5532
So far only beep at start, no sine wave on pin1 4024, *waiting for the parts arrived.

BC558 is most probably wrong choice there.

[walkman]

[QUOTE = ripsdevala; 258454] Mps6522 kullanmayın,
NE5532 ile BC558, mpsa63'? BC327
TL072 ile NE5532'ye koydum.
Şimdiye kadar sadece bip sesi geliyor, pin1 4024'te sin?s dalgası yok, * par?aları bekliyor.



Check please TL072 8. pin====>+5v connected?

[bernte_one]

Enjoy

can you put lay files here in thread as zip container
many thanks

[dfbowers]

The thing about the TL072 is that we are coaxing it to work on a single supply so it can only swing + or - 2.5v either way.
It's also a JFET.
As for the MPSA63, it's a Darlington pair. The BC327 might work but you would probably get very low volume at best.

[Gwil]

Does the thickness of the coil wire affect performance? The original schematic showed 24 AWG, and the redesigned version uses 30 AWG. Thicker wire would increase the Q of the coil which I imagine would increase sensitivity, but it might make ground effects more of a problem.

[dfbowers]

Does the thickness of the coil wire affect performance? The original schematic showed 24 AWG, and the redesigned version uses 30 AWG. Thicker wire would increase the Q of the coil which I imagine would increase sensitivity, but it might make ground effects more of a problem.

I don't see much difference. The only thing I noticed is that the trimmer cap on the emitter needs to be set at a lower resistance for the 30-AWG coils. I would stick with the 24 AWG wire if you have it but I just used what I had laying around.

[Gwil]

That's good enough for me. Thanks.

[shahrayar]

Excellent work

Do you distinguish metals?
Thanks for everyone and a good day

[WM6]

Do you distinguish metals?

Of course. Very simple. Using eyes after dig.

[ivconic]

BUGGER!
I spent 3 hours trying to make it work... UNTIL i spotted stupid mistake that i made on my pcb draw!
Since i changed original schematic and used second part of LM358 for virtual ground; i wrongly connected 5. pin of LM358 to virtual ground INSTEAD to "minus" rail.
So it will remain silent no matter what you try.
I am attaching here the marked error and corrected Sprint Layout file. For those who maybe already made it according to my pcb; you only need to cut track on two places and reconnect properly.
For those who yet intend to make it; attached Sprint Layout file is now quite correct, tested and checked!
Yes Don was right, BC327/40 will not do. Yet; BC560 will do just fine. Because i couldn't obtain MPS in local shops. So i tried some similar types. BC560 is closest from what i tried.
10k trimmer to adjust 3vpp at 1. pin of 4024 is somewhat critical (due not noted transistor on place) to adjust . I managed to find narrow spot where it starts to oscillate and works quite alright. So be patient and slow when turning the trimmer.
At the audio output i put BC516&BC517. Alright!
Now is fine. Alive and kicking. Have some potentials. I only need to make better coil.

Here is the error and how to correct it:


And here is the corrected pcb design:
TRic.zip

[bernte_one]

i got 40 pcb, if needed some please contact me
i can send EU wide

[bernte_one]

i got 40 pcb, if needed some please contact me
i can send EU wide

i forget the price, you can pay whant you want via paypal plus shipping costs to your country
would send it as simple letter, paper wrapped