TESORO GOLDEN SABRE

[perdica 2]

problem

i made tgs on 1256 PSB and;
-oscilator good 14kh 4.3vAC
-voltages only with CD4024 good +8v and -6v
but when i put all ICs voltages drop to a +5v and -2.5
can anyone tell what can cause the prolem
i checked all components ten times

[simonbaker]

i made tgs on 1256 PSB and;
-oscilator good 14kh 4.3vAC
-voltages only with CD4024 good +8v and -6v
but when i put all ICs voltages drop to a +5v and -2.5
can anyone tell what can cause the prolem
i checked all components ten times

How did you measure oscillator voltage, meter or scope? If meter, what model?

Are your ICs in sockets? If so, can you put them in one at a time and check voltage?

What battery are you using?

If possible, post good photos of both sides of PCB, and mounted box -- show batteries too.

Do you have an oscilloscope? People can help if you can probe and show photos of waveforms.

Many experts here can help I'm sure.

Regards,

-SB

[simonbaker]

http://cgi.ebay.com/ws/eBayISAPI.dll...m=290272107600

Only about 8 hours Left!

I hope someone on this forum gets it!

Note: small concentric coils -- what I expected to go with quick response circuitry. TGS probably not designed for depth and big targets like we push it.

-SB

[perdica 2]

i don't have a scope,but i have a four tipes of meters
all components are as they should,batery brand new 12v 1.3a,coil's TX-6mh-20ohm RX-6.5mh-21ohm
i put components one at a time and only result is smaller and smaller voltage
-i have made Goldy and no problem with voltages (only moments of crazynes and continius bleeping)

[simonbaker]

i don't have a scope,but i have a four tipes of meters
all components are as they should,batery brand new 12v 1.3a,coil's TX-6mh-20ohm RX-6.5mh-21ohm
i put components one at a time and only result is smaller and smaller voltage
-i have made Goldy and no problem with voltages (only moments of crazynes and continius bleeping)

Can you hook up a milliameter in series with the battery and tell us how many milliamps are being drawn?

One possibility is a bad 7808 regulator, not passing enough current. Or some kind of high resistance (> 50 ohms) in series with supply rails.

Is the battery rechargable?

Another area to check are the transistors TR7, TR8. If they are not saturating fully (push-pull) at alternate half-cycles, you may not be supplying enough current. Double check the resistors R9 through R12 biasing and driving those transistors. Make sure 4.7K, not 47K, and 2.2K, not 22K.

-SB

[Eugene52]

TESORO GOLDEN SABRE

Hi,
Ivica.
I now that you have a lot of work and also you are on other project but Please help here.
I have made a progress with my TGSL 1265.Buy changing some caps.But still havent recived my pair of LM308 and just for tests 081 but this make a diferance as you now.So I get a prety good responce and loud sound but I have proceeded to change caps and now the sound is broken.Damn.From a begining again.
I will make a picture with the TRs voltages so you can help.I suspect something there.
Also can you tell me where to conect the - point from monostable?To -8V or GND?
I have tryed TLC271 insteed of LM308 but no good.
Thanks

Hello Tiktak , If you have crazy noise problems , do not forget about this circuit board lay-out from page 20 of this Golden Sabre thread...............Regards..............Eugene

[tiktak]

Hi

Hi,
No my problem is not with design.
Both are good.
Maybe some missmatch.
I will solve it.
Just finish monostable.I will try it at last.But still wonder where to conect the - point from the small PCB.On schematic its -8V and in Ivconic post its says GND.

[tiktak]

Hi

http://cgi.ebay.com/ws/eBayISAPI.dll...m=290272107600

Only about 8 hours Left!

Hi,
Molzar.
Congratulations!
So we will see whats inside.And what we miss.
Nice investition.
At last................
.

[perdica 2]

How did you measure oscillator voltage, meter or scope? If meter, what model?

Are your ICs in sockets? If so, can you put them in one at a time and check voltage?

What battery are you using?

If possible, post good photos of both sides of PCB, and mounted box -- show batteries too.

Do you have an oscilloscope? People can help if you can probe and show photos of waveforms.

Many experts here can help I'm sure.

Regards,

-SB

Can you hook up a milliameter in series with the battery and tell us how many milliamps are being drawn?

One possibility is a bad 7808 regulator, not passing enough current. Or some kind of high resistance (> 50 ohms) in series with supply rails.

Is the battery rechargable?

Another area to check are the transistors TR7, TR8. If they are not saturating fully (push-pull) at alternate half-cycles, you may not be supplying enough current. Double check the resistors R9 through R12 biasing and driving those transistors. Make sure 4.7K, not 47K, and 2.2K, not 22K.

-SB

you are right it was bad 7808 regulator.Why i dont know i check it before it was fitted up and give 8v.With direct power suplly at out of regulator all voltages are good

thank's

[simonbaker]

Hi,
Molzar.
Congratulations!
So we will see whats inside.And what we miss.
Nice investition.
At last................
.

Wow, excellent! Looking forward to details, photos, etc!

[Friday]

hi...I built this coil.is it right?

TX: 6 mH akort(same) 20nF frequency: 14.528 kHz

RX: 7.49 mH akort(same) 15nF frequency: 15.015 kHz

Regards...

[Molzar]

Hi Simon / Tiktak,

Yes... could be very interesting to take a glance at "original beast". But I not that optimistical there will be any real big difference. I think performance be less than results posted here as handmades I think can be tweaked much higher performance. Is be fun though, may be here by week end. Will keep you informed.

Molzar

[Molzar]

hi...I built this coil.is it right?

TX: 6 mH akort(same) 20nF frequency: 14.528 kHz

RX: 7.49 mH akort(same) 15nF frequency: 15.015 kHz

Regards...

Friday,

This not correct. Tx should be with 15 nF cap, Freq=14.6kHz

Inductance seems high but this depends alot on instrument used and method of measure.

Don't worry to much of inductance just follow recipe for good coils in this tread.

Molzar

[simonbaker]

Hi Simon / Tiktak,

Yes... could be very interesting to take a glance at "original beast". But I not that optimistical there will be any real big difference. I think performance be less than results posted here as handmades I think can be tweaked much higher performance. Is be fun though, may be here by week end. Will keep you informed.

Molzar

Lots of questions can be answered... which side of LM7808 are big capacitors, audio driver circuit, feedforward resistor, etc..... fun!

Regards,
-SB

[Molzar]

Simon,

Recieved the orginal beast today. Took a quick look inside and........

Is just what I had thought previously, pcb looks like almost perfect match for one posted by Kurtie100 on page 1!

Of course this was just quick peek, will do more thorough analysis soon.

Molzar