1266 and CZ5

[Geo]

If rhe output transformer will not work then try with the driver trans. The most importand is the tap to be at center.

[ivconic]

Thanks!


Thanks Geo!
I understand problem, it will take some brains shaking to replace that transformer with quite different electronics. Level of transformation,aka level of symetrical signal is worring me...Not only that i have to pass full phase,but i have to keep level enough to drive op-amp inputs,not too strong,not to weak...ts,ts,ts! Remainds me on early "radio amateur" days....
I forgot to answer you, noo,sorry, i do not understand russian at all....maybe few words....but weak,very weak...
best regards!

[Satel]

Happy New Year !
Who can tell me, what program used in CZ 5 and 1266 pcb-s and is it possible to download it?

Thanks.

[Geo]

Happy New Year !
Who can tell me, what program used in CZ 5 and 1266 pcb-s and is it possible to download it?

Thanks.

I open this pcb files with Protel 99SE. It is a big and difficult program. Look for a trial version.

[Geo]

Hi Ivconic. I just looked at 1266 schematic. Ohh i am sure that with a output transformer you will make work. Take one Transformer from push- pull with center tap and connect the speaker output at the side of L2. If there is problem with the signal level then play with the resistance 1 OHM in series with L2. Now read the GOOD. When you will finish the 1266 and it work fine then give me the files to construct one (he .. he..he). But i am sure that there are litle differences at sensitivity between 1266 and classic. The main difference will be at discrimination.
Ohh something else. Why you write us every day so early (02 or 03 or 04 clock?)
My regards

[ivconic]

Thanks Geo!


Thanks Geo!
I'll report you when finished.
I am night creature.I sleep by day and awake by night....I can not stand to much of the day lately....
regards

[Unregistered]

CZ5?

What is wrong with trying to build a CZ5? Do you have to have an electonics degree? Could anyone build one?
Thanks
Bill

[ivconic]

No...


Comment was made due its complexity....nobody stops you to build it...
I am not able to do that....
regards

[Geo]

Hi Ivconic . I show the schematics of 1225-1235. All have a transformer but they use a non tap transformer and a transistor to drive the TC374. So if you ave any problem (I dont think) put on air a few component and 1266 will work fine. After it its my time to build it (who makes the pcb???:confused: :mad: )
Have a nice day

[Geo]

What is wrong with trying to build a CZ5? Do you have to have an electonics degree? Could anyone build one?
Thanks
Bill

I am not sure if there is a mistake on schematic. Pcb is not a original pcb so who knows:confused: if works properly. Jackdetect:mad: wrote to Esteban to check the pcb. So nobody knows if pcb is ok. Who knows if the components are at the right place to minimise the parasitic capacitance and why not "self oscillations" ?

[ivconic]

Suitable!


Geo,you were right,i found transformer in my junk box. 1.6ohms and 2x24ohms,from old portable radio receiver(audio stage,push-pull)...Resistance is close enough to try it.Size(volume) of transformer suits pcb also,so i will try it....If works ok,if not than i'll try to dig something else...
regards

P.S.
As i remeber, Jackdetect made his own vlf,according to some stages taken from CZ5, but only some stages...His vlf was on one pcb....When i talked to him,last year,he told me that building copy of CZ5 is nonsence,due its complexity,while on same side,man can assemble quite easier device with same performances.Fisher CZ5 is very good machine,but considering its performances comparing with other,nothing special...Also price is not so big,man can buy it easilly than make it....
If pcb is accurate or not,i do not know,i never tried to check...I already have CZ5 original....

[ivconic]

HHHRHHH!!!

:mad: :mad:
I am in the middle of building 1266....Some doubts occured now????
First, i noticed on many schematics that transistor is connected with
emiter and base togather(shorted) or in other case collector and base???
What is role of this kind of setup??? Can we use plain diode instead
transistor??? Also there are 2 cases on 1266 schematic where; on one place
MPSA13 is used with shorted base and collector, on other place with base
and emiter shorted ??? What is difference??? Also,on same schematic other
type of transistor is used in simillar setup - MPS4104 with base and emiter
shorted??? Is there any differences if we use other type of transistor with
shorted b+c or b+e...???
I also noticed few differences on pcb and schematic. On U402,pins 5. and 6.
are connected on schematic but NOT on pcb???
Or,R71 and diode are omited from pcb,also C36(47pF)....
Also i found out different values arround TLC27M9 (marked on posted picture).
It is very possiblle that pcb's have more mistakes (or maybe schematic?)...
So far i found those,mentioned...

Also i do not know how to connect VP0104....? Pin assign. is in S G D order,but
i can not distinguish which one is on schematic???
Posted photo of 1266 is blur enough,man can not see cleary....
I was thinking to replace those MPSA13's (with shorted b-c or b-e) with some
ordinary transistors.....which one? I would like to avoid BC517,since i do not
have those now....How about BC550 or 2N2222 ???
MPSU51 is easy to replace with BD138,only different pin assign.
So, anybody know answers??
:mad:

[rumensat]

you have to be moore flexible. tranzistors are small signal pnp and npn and d'snt matter what kind.
schematic of sound is rely terrible thats why take another - i took from F1280
u402 6,5 is for batt check i dont make it all. bat check make with two npn and led - led go on when bat is low.
t12 and r71 are limiter you can trow them away.
would you like my version ?
www.acs-bg.net/temp/1266-remake.JPG

[Geo]

Hi Ivconic.
Lets go
As i remember (if i remember good) transistor is connecting as low voltage zener. I have an article about it.. I"ll find it and write you again. So i think that you must put the transistors (no diode:mad: ). Now if you can put another transistor for MP4104.. YES but who transistor gives the same zener voltage:mad: ?
On U402 pin 5 and 6. Make a jumb on pcb (you must do it).
About R71 and diode try without them. I think there is not problem.
C36 (47pF) is for selfoscilations. Solder it on the back side of pcb.
I"ll write you again later (i must go out). Don't afraid . 1266 will work.
BUT will work Better than Fisher1266. I am sure. Try it
Regards

[Geo]

Here again. I made a big mistake. MPSA13 and MPS4104 are connecting as current source. So you can change them with other transistors.
Sorry Ivconic .