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Salas DCG3 preamp (line & headphone)
Salas DCG3 preamp (line & headphone)
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Old 5th September 2021, 06:01 PM   #5791
RainfallSky is offline RainfallSky  Russian Federation
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I found a way that worked for me but will clean lead anyway.
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Old 5th September 2021, 06:32 PM   #5792
Salas is offline Salas  Greece
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Salas DCG3 preamp (line & headphone)
Quote:
Originally Posted by RainfallSky View Post
I am afraid to expose copper on tin copper leads.
I guess it must be of high grit number and only a few careful moves.
Will experiment on the end of the leads later.
High grit yes, to polish the tin
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Old 5th September 2021, 06:42 PM   #5793
Salas is offline Salas  Greece
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Salas DCG3 preamp (line & headphone)
Steel wool is also very good for oxides removal. Maybe you have some in the kitchen to rub pots and pans.
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Old 26th September 2021, 03:34 PM   #5794
jimk04 is offline jimk04  United Kingdom
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Still enjoying my DCG3 , naturally. It is an amazing preamp. I was going to re house my build and I came upon this neat little pcb on AliExpress. It will save me some space. And best of all it is in Salas/Tea bag black!

Double E cow non the less!?!

£4.82 8%OFF | Double E Cow Power Supply Board Gold Board Suitable For 15-25W Talema Transformer Or Bingzi Green Transformer
Double E Cow Power Supply Board Gold Board Suitable For 15 25W Talema Transformer Or Bingzi Green Transformer|Amplifier| - AliExpress
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Salas DCG3, Ian Canada streamer, JLE 3255, Miro AD1862 diy XRK Ref Monitors. Currently building Pass AB100, Wayne's BA18
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Old 27th September 2021, 07:14 AM   #5795
le´flu is offline le´flu  Germany
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Hi there,
nice little PCB. But aren´t the fitting transformers (25W talemas) way to
small for the DCG3? What current are you running your DCG3?
Greetings Ulf
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Old 27th September 2021, 07:22 AM   #5796
jimk04 is offline jimk04  United Kingdom
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When I built it I thought that the talemas were too small but I did see a build on here that used the 25va jobs. I dont use the headphone output and I have it set to one a low bias.
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Salas DCG3, Ian Canada streamer, JLE 3255, Miro AD1862 diy XRK Ref Monitors. Currently building Pass AB100, Wayne's BA18
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Old 27th September 2021, 07:26 AM   #5797
le´flu is offline le´flu  Germany
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Okay, i understand.
Question to Salas and others:
will the DCG3 sound different when driven with different current?
And will there be a change in THD?
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Old 27th September 2021, 09:00 AM   #5798
Salas is offline Salas  Greece
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Salas DCG3 preamp (line & headphone)
In post #1 there are detailed THD plots across frequency on different loads that show 150mA bias is somewhat useful in 32Ω headphones but not in line level situations. It also raises power limit in such a load. Subjectively I didn't find any plausible benefits between 100 & 150mA bias in line level use.
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Old 27th September 2021, 09:42 AM   #5799
le´flu is offline le´flu  Germany
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Salas, thanks for quick answer,
so using two Talema toroid transformers 2*18VAc / 25VA will be
absolutely perfect for the DCR3?

Greetings Ulf
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Old 27th September 2021, 09:53 AM   #5800
Salas is offline Salas  Greece
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Salas DCG3 preamp (line & headphone)
25VA spec is theoretically sufficient although if they have more than average thermal losses they may get warm due to the significant bias constant draw. I have seen that happening with plastic encapsulated 30VA split bobbin frame on DCG3 going about 45C but toroidal usually runs cooler.
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