Richard,
That would work fine.
As would, arranging for the cathode to be at zero volts, through some power supply trickery. But then one might consider the power supply caps to be in series with the speaker / load.
But aren't they always..
Just my little bit of mischief - in Franks absence someone must
Cheers,
Absolutely.
That would work fine.As would, arranging for the cathode to be at zero volts, through some power supply trickery.
But then one might consider the power supply caps to be in series with the speaker / load. But aren't they always..
Just my little bit of mischief - in Franks absence someone must
Cheers,
CAPS
Hi,
The PSU caps of all anode loaded stages are in series with the output stages,which is not the same as having the output cap in series with the signal path however.
That doesn't mean the PSU caps' quality does not reflect on the signal outputs' quality either.
In fact I always say one listens to a PSU,not an amplifier.
I'm back,
Hi,
The PSU caps of all anode loaded stages are in series with the output stages,which is not the same as having the output cap in series with the signal path however.
That doesn't mean the PSU caps' quality does not reflect on the signal outputs' quality either.
In fact I always say one listens to a PSU,not an amplifier.
I'm back,
YEP.
Hi,
Given an OTL output stage, one may say the PSU caps are in series with the speaker load (to me they are, no matter how you turn them).
As they are on so many other occasions anyway.
Saying that this has the same deleterious effect as running the signal straight through an electrolytic cap is a bit of an overstatement IMO.
Which brings me to square one:all psu components are in the signal path.
The tricks to minimize the effects I'll try to explain in the PSU thread.
Cheers,
Hi,
Given an OTL output stage, one may say the PSU caps are in series with the speaker load (to me they are, no matter how you turn them).
As they are on so many other occasions anyway.
Saying that this has the same deleterious effect as running the signal straight through an electrolytic cap is a bit of an overstatement IMO.
Which brings me to square one:all psu components are in the signal path.
The tricks to minimize the effects I'll try to explain in the PSU thread.
Cheers,
Hello,
Well, this one uses the same output tubes .
Also, does anyone tried this version, any comment on sound ?
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
Well, this one uses the same output tubes
.Also, does anyone tried this version, any comment on sound ?
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
Attachments
AT LONG LAST...
Hi,
Pardon my sarcasm on the first bias supplies.
Honestly they showed a lack of understanding beyond (my) belief.
What you present is a bias supplly allowing you to corrrect some inballance at least.
This is exactly what _arg and myself have been discussing off "forum" for a while.
The Cufioli circuit may seems complex,in reality it is made complex for no reason at all.
With all OTL circuits,pay attention to the PSU.
Cheers,
Hi,
Pardon my sarcasm on the first bias supplies.
Honestly they showed a lack of understanding beyond (my) belief.
What you present is a bias supplly allowing you to corrrect some inballance at least.
This is exactly what _arg and myself have been discussing off "forum" for a while.
The Cufioli circuit may seems complex,in reality it is made complex for no reason at all.
With all OTL circuits,pay attention to the PSU.
Cheers,
Hi,
EC360 I dont think is a very common tube and can be difficult to source.
Where did you get the schematic? It is not possible to get 20W from only 4 of these tubes especially with only +- 70V anode voltage. The EC 360 is only specified to max 250mA current which doesn't take you very far, you need ~2.5A peak to get 20W. The 6C33C can give you this current but then you need a voltage of ~140V minimum.
Regards Hans
EC360 I dont think is a very common tube and can be difficult to source.
Where did you get the schematic? It is not possible to get 20W from only 4 of these tubes especially with only +- 70V anode voltage. The EC 360 is only specified to max 250mA current which doesn't take you very far, you need ~2.5A peak to get 20W. The 6C33C can give you this current but then you need a voltage of ~140V minimum.
Regards Hans
Hi Hans!
Thanks for the answers!
Here in Hungary some people built it already and it works. I try to get contact with them for more info. I think the schematic comes from an amp "cookbook", but I would like ask here some international tube guru for oppinions. I read the EC360 can easily work on such a low voltage and with 200mA. May be the 20W output is a dream, but the main question is: could this circuit work or is there any error?
Thanks!
Thanks for the answers!
Here in Hungary some people built it already and it works. I try to get contact with them for more info. I think the schematic comes from an amp "cookbook", but I would like ask here some international tube guru for oppinions. I read the EC360 can easily work on such a low voltage and with 200mA. May be the 20W output is a dream, but the main question is: could this circuit work or is there any error?
Thanks!
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