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Old 26th April 2013, 11:13 AM   #2341
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Mr Pop may have to find better loudspeakers than Unitra (Tonsil) Altus 140.
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Old 26th April 2013, 05:15 PM   #2342
alex mm is offline alex mm  Romania
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....... few years ago I have changed everything , filters and laudspeakers , but enclosure remains the same ..... Right now I have other priorities .....
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Old 3rd May 2013, 08:11 AM   #2343
Pocoyo is offline Pocoyo  Indonesia
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Quote:
Originally Posted by hcbonfim View Post
Hi, i bought my boards last year (maybe 2) and i don´t know the right schematics em BOM, parts mask, etc...Now i want to populate them.
My boards (each one) have 6 Mosfets (TO-3) and was done by Nagys and Alex MM, the boards are revision 3.9. Somebody has the right schematics and parts lists ?

cheers
Hi HC, look page 224 for Liliya explanation

Looks like i got Nagys Amp with 2 pair transistor output
One thing i liked here, those PCB just need 40 VAC, so
i can use my transformer here 2x 0-45 vac hmmm all the
caps will be going to 80v or 100v

start with PCB, Transformer than start to look output
mosfet and other parts ...
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Old 3rd May 2013, 09:02 PM   #2344
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Quote:
Originally Posted by Pocoyo View Post
start with PCB, Transformer than start to look output
mosfet and other parts ...
HCBONFIM has kindly sent his boards to me as a gift!!!
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Old 3rd May 2013, 09:33 PM   #2345
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Hi smartx21,
By the way, did you received the boards yet?

Thanks Pocoyo, as you see i sent the boards to Smartx21.
Now i am planning to build the Telos 390 clone,

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Old 4th May 2013, 01:32 AM   #2346
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Quote:
Originally Posted by hcbonfim View Post
Hi smartx21,
By the way, did you received the boards yet?
According to mailing system website, it is quite close.
Hope to get them by the next week.
Thank you very much for this kindness.
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Old 20th September 2013, 07:59 AM   #2347
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I had a problem with Goldmund - Put the protection.
After much searching, I found that it shorted relay.
I did some measurements again and found some tension, which I do not know if they are OK ...
In pic Goldmund 1:
At T11:
B-1.2V
E-0.6V

At T12:
B-0.7V
E-0.18V

Bias - 100mA each final transistor.
(I did not put them 0.22R)

If you do circuit that pic Goldmund 2 - tensions are equal.

Noting that this problem is in both channels.

Audible sounds good but do not know if it is ok or I have a problem...

Thank you!
Attached Images
File Type: jpg 003.JPG (192.0 KB, 886 views)
File Type: png Goldmund 1.png (77.8 KB, 868 views)
File Type: png Goldmund 2.png (76.6 KB, 847 views)
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Old 20th September 2013, 10:03 AM   #2348
AndrewT is online now AndrewT  Scotland
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3mV of output offset combined with 2mV (76-74) of LTP differential seems to indicate that all is working correctly.

The voltages around the bss (T11&12) & output gates seem very wrong.
The PNP driver has a +ve voltage across the Vbe. It should be a -ve voltage for the PNP.
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Old 20th September 2013, 11:13 AM   #2349
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Thank you very much, AndrewT!
When I started last year, tensions Those were like green ...
When the collector T7 had 29.2V, tensions were equal to T11-T12. Now are 8.2V and are not the same ...
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Old 20th September 2013, 11:51 AM   #2350
AndrewT is online now AndrewT  Scotland
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your green +1.2V and +0.6V on the base and emitter of T12 again show a +Vbe.
That cannot be right !

Compare to T11, where the +ve voltages also give a +ve Vbe on the NPN transistor.
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