RELIC HAWK

[ivconic]

Tiktak get real for a while! You missunderstanding everything here.
I am affraid to post anything new here due risk to receive bedlam of your trivial questions!
I dont have such energy to be polite and answer on every stupid question!

This choke does not exist on "coinseeker", UNDERSTAND!?
This is located on original RH pcb in audio part, see schematic - small transformer!
Bulgarian "modders" modded audio at coinseeker and put something else, and omited original parts from RH.
Now, do you understand ?
So i thought might be helpfull to know which one of pins are used on this small transformer in case somebody else do have original RH pcb and want void unsoldering that small transformer. There is one more trace drawn on original pcb and connecting only third, unused pin in primary winding. Goes nowhere on pcb. "Blind" trace, not connected anywhere, just drawn?
Do not ask every possible details about this. Shhheeeeeshh!
Everything is so clear. Look on schematic Max posted last. It is accurate 100%. No more words needed here.
Fred you may start drawing new pcb according last Max's post, it is correct and accurate. Don't worry about exact op-amps, they all have same pinouts - same power lines and I/O pins, respecting which one is single or dual op-amp.
Later we can put ic sockets to distinguish which type is most suitable.
But for now, you have more than enough informations to start drawing.
Regards!

[tiktak]

Hi,

Yep.
Now its clear but agree that I couldn't now this!
Even according to schematic and the pictures.

[nakky]

[nakky]

[Fred]

Fred you may start drawing new pcb according last Max's post, it is correct and accurate. Don't worry about exact op-amps, they all have same pinouts - same power lines and I/O pins, respecting which one is single or dual op-amp.
Later we can put ic sockets to distinguish which type is most suitable.
But for now, you have more than enough informations to start drawing.
Regards!

Ok Ivconic,thanks.
It will take some time as now it´s summer and i spend more time outside (fishing and diving too ) , i wanted to confirm pinouts but if they are all the same it is much easier.
I´ll begin PCB soon.So in winter we can build it
Regards,
Fred.

[Max]

Hi Max,look at hand draw RH schematic,I think U11 must be LM339.Grt Nakky.

Hi,
yes, was my thought too , nice to hear you think the same: I think we are on the right way... to RH cloning!

Kind regards,
Max

[Max]

Max.
I meaned this part.
Exelent work with the schematic.This is progress for shore.

Hi,
Ivconic told you: it's inductor stuff for audio stage thing... I think cause it's very unlike we can find suitable replacement of same size/terminals etc we can make there just two pads and then connect the thing required (any shape) with leads... just we have to remember to leave some extra space for stuff that require more room there (nucleus etc).

PS: tiktak please leave out the bulk of questions for now... we have to focus on interesting stuff... we need to focus on inductor too but don't need every detail to replicate anything... just what we need to understand device could work.
So , please, avoid posting such questions and let people here concentrate on useful details.

Kind regards,
Max

[Fred]

Hi,
Ivconic told you: it's inductor stuff for audio stage thing... I think cause it's very unlike we can find suitable replacement of same size/terminals etc we can make there just two pads and then connect the thing required (any shape) with leads... just we have to remember to leave some extra space for stuff that require more room there (nucleus etc).
Max

Hi Max,
Yes this is important to remember, i think tthere is no other "tricky" part...
I don´t exactly understand the real purpose of this inductor, probably some filter/impedance matching circuit,a jumper or resistor should work for testing purposes...
See you,
Fred.

[Fred]

Hi,
Can you confirm that Max´s "-vee" is the same as the "-" on schematic? seem logical but ...that´s 3 negatives supplies, "-2,5" , "-" , and "-vee " .
I prefer schematics whith common +/ov/- rails , this one is not so clear to make a PCB from...
Regards,
Fred.

[Max]

Hi,
Can you confirm that Max´s "-vee" is the same as the "-" on schematic? seem logical but ...that´s 3 negatives supplies, "-2,5" , "-" , and "-vee " .
I prefer schematics whith common +/ov/- rails , this one is not so clear to make a PCB from...
Regards,
Fred.

Hi Fred,
the -2.5V at LM336 is reference voltage only ... used by some op amps so doesn't give real power to circuits: notice that it's 2.5v from negative potential value (reference potential).

The "-vee" I use is the same as "-" : I use that terminology cause often employed with op amps etc not cause it's different voltage.

Actually the "-" voltage is connected to the negative of battery: that's cause the GND potential is generated actually by op amps... look at the one that has 100ohm on output (part of the quad op amp ic) and you'll find it.

That's old trick to generate GND potential with enough current/power from single voltage operations.

PS: Fred if you try make PCB remember decoupling caps , 2 for each ic, 100nF

Kind regards,
Max

[Fred]

Ok Max, thanks.

I prefer schematics whith common +/ov/- rails , this one is not so clear to make a PCB from...

What i meant is that i prefer common supply rails drawn on the schematic.
Just an observation, no matter here...

see you,
Fred.

[Max]

Hi,
to make things more clear, there are 5 rails on RH schematic:

1) + or +Vcc (different names for same thing)
2) - or -Vee (different names for same thing)
3) GND , that's ground rail (with large mA load ability cause of buffering)
4) -2.5V at LM336 , that's only reference voltage
5) +2.5V at op amp out, that's complementary reference voltage

As you can see +,- are for supply, GND is reference GND level for op amps operations, and +2.5/-2.5 are reference used to e.g. pots as VERY stable (compensated) voltage refs.

Here is revision 1.2 with all that stuff in magenta color.

Kind regards,
Max

[Max]

Hi,
just cause seems a bit tricky for some of us... I decided posting a picture of what I expect for voltages at the 5 rails using GND as reference.

Any dubt ? Let me know...

Kind regards,
Max

[nakky]

RH

Thanks Max,this is also my problem,I am not technical,I can only COPY.Grt Nakky.

[Fred]

Hi,just cause seems a bit tricky for some of us... Max

+VCC=+12V unregulated...
Fred.