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Old 28th May 2008, 06:12 PM   #21
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Quote:
Originally posted by tubenut
Glide, looking at the pics it seems you connected DC in the pads left by the diodes?

That means you are feeding 15V regulators 12V, this would not work properly and they would certainly be starved. It probably works though because for some bizarre reason project bypassed the regulator inputs to outputs with some resistors of a few hundred ohms though I know not why...

You may wish to remove the badly behaving starving regulators all together, or replace them with types that are at least 3V below your battery voltage, or up the battery voltage to at least 3V above the 15V regulators.

Or at least, remove the resistors and feed directly to the OP amp PSU pins through the pads left by the resistors. Leaving the regs out of circuit. This would loose the miserable small smoothing caps though.

Those teeny regulators starve the poor stage anyway, I replaced them with a little dexterity with TO220 versions and got rid of all the ceramics in the RIAA.

Rolling op amps can be fun and fustrating, like some cables and tubes.

Croak... yes, the DC is connected to the diodes pads - this is very interesting, I now only realise it just after you mentioned it... mmm. Have to see about bypassing the regulator(tjies) or replacing them.

I will see about the ceramic caps. What value?
I dont find the mystery codes on caps very funny!

D
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Old 28th May 2008, 06:43 PM   #22
tubenut is offline tubenut  South Africa
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Quote:
Originally posted by GlidingDutchman


Croak... yes,
Round here I am tubenut, though, at this time all my tubes are in cupboards and I use mostly chemical processes to amplify rather then swarms of warm electrons in a vacuum. This may change...


regulator(tjies) ------> spanning afvlakker(tjies) IIRC...
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Old 28th May 2008, 06:53 PM   #23
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Quote:
Originally posted by tubenut


Round here I am tubenut, though, at this time all my tubes are in cupboards and I use mostly chemical processes to amplify rather then swarms of warm electrons in a vacuum. This may change...


regulator(tjies) ------> spanning afvlakker(tjies) IIRC...
Ik denk niet de karakters hier de woord spanning afvlakker zullen begrijpen.

No tube in your system?

What do you use BTW at the moment?

D
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Old 28th May 2008, 07:24 PM   #24
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Als echte nederlander ik ook niet
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Old 28th May 2008, 07:24 PM   #25
tubenut is offline tubenut  South Africa
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Plenty Dutch fellas around here but I actually meant the Afrikaans word. Not sure what the dutch word is. (Tjies being afrikaans, tjes Dutch).


I Pod Shuffle + Sennie MX300 or HD40
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Old 28th May 2008, 07:36 PM   #26
tubenut is offline tubenut  South Africa
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Quote:
Originally posted by GlidingDutchman


Ik denk niet de karakters hier de woord spanning afvlakker zullen begrijpen.
D
Calling a person a character, in English, Dutch or Afrikaans is not very compimentary or polite....

Nuff Lingo, back to phonohoax/battery power...

though I have little more to say on the subject at this time.

This thread hasd more info Schematic for Pro-ject phono box
I see you found it already.
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Old 28th May 2008, 07:39 PM   #27
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"Regulateur de tension" in French... so it must be "Spanning Regulator" in Dutch & Afrikaans

D
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Old 28th May 2008, 07:41 PM   #28
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Originally posted by tubenut


Calling a person a character, in English, Dutch or Afrikaans is not very compimentary or polite....

Politely speaking sir!

Yes, I have found the other thread but what difference are ther between the two phonobox designs...?

D
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Old 28th May 2008, 07:53 PM   #29
tubenut is offline tubenut  South Africa
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IMO the box and I think SE gets rid of the ceramics.








(Afvlakker is correct word in Afrikaans for sure, there may be that and spanningsregelaar in Dutch.
Afrikaans electronic lingo is a mix of Dutch and bastardised english words. The word for capacitor in Afrikaans and dutch is not the same for eg, the dutch word voeding is a kragbron in Afrikaans etc etc etc..)
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Old 28th May 2008, 08:03 PM   #30
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So you recommend me changing these marked with the red arrows?

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