Hi Bas
No comparison, I love the EL84 in any shape or form but the OTL slays it. IMHO (self protection from those who protest such a statement)
Reinhard, pretty much told the story (especially the bass!- tuneful with lots of slam), add to that great clarity and a neutral character and you have a winner.
It sounds even better after its been on for about 8 - 10 hours!
I would like to see a higher power version, ~ 20W.
Andrew
No comparison, I love the EL84 in any shape or form but the OTL slays it. IMHO (self protection from those who protest such a statement)
Reinhard, pretty much told the story (especially the bass!- tuneful with lots of slam), add to that great clarity and a neutral character and you have a winner.
It sounds even better after its been on for about 8 - 10 hours!
I would like to see a higher power version, ~ 20W.
Andrew
Oh, I didn´t know that the 6C19 can pass 1A peaks!
According to the curves I´ve seen it should be more like 150mA or so, but at a closer look the first curve is -5V instead of 0V as one would expect.
According to the curves I´ve seen it should be more like 150mA or so, but at a closer look the first curve is -5V instead of 0V as one would expect.
A little inspirational reading about SE otl´s:
http://www.eng.umu.se/personal/morgan/Valvular Pages/pages/otl_page.htm
http://www.eng.umu.se/personal/morgan/Valvular Pages/pages/otl_page.htm
Reinhard:
I understand why you don´t want to share the schematic, but some hints about the voltages and currents in the output stage would be very helpful🙄
I understand why you don´t want to share the schematic, but some hints about the voltages and currents in the output stage would be very helpful🙄
As I told you the cathode follower is working on an inductor.
Each C19 has an additional cathode resistor of 5 Ohmsfor better
current sharing. The plates are sitting at nearly 100 Volts and the grids are at -12 Volts (Three teminal reg)
Don´t know the bias current but I thnk it is near 400 ma to get
1.5 Watt at 8 Ohms.
Reinhard
Each C19 has an additional cathode resistor of 5 Ohmsfor better
current sharing. The plates are sitting at nearly 100 Volts and the grids are at -12 Volts (Three teminal reg)
Don´t know the bias current but I thnk it is near 400 ma to get
1.5 Watt at 8 Ohms.
Reinhard
Dear All,
Howabout the circuit in this:-
http://www.jogis-roehrenbude.de/Verstaerker/6C19/6C19.htm
Does ant of you tried the OTL one ?
CHOW
Howabout the circuit in this:-
http://www.jogis-roehrenbude.de/Verstaerker/6C19/6C19.htm
Does ant of you tried the OTL one ?
CHOW
Hi, happy Lunar New Year!
The 1.5W SE OTL from BR use 1 6H30 and 4 6C19 per channel as i know;
is it 4 x 6c19 build up two pairs of SRPP which can drive 8 ohms load. If not, can anyone tell me how the SE OTL manage to drive a 8 Ohms speaker.
Thanks a lot.
CHOW
The 1.5W SE OTL from BR use 1 6H30 and 4 6C19 per channel as i know;
is it 4 x 6c19 build up two pairs of SRPP which can drive 8 ohms load. If not, can anyone tell me how the SE OTL manage to drive a 8 Ohms speaker.
Thanks a lot.
CHOW
NO SRPP
No, not SRPP, have described the outputstage above. Read the thread carefully.
An SRPP is more push pull than single ended.
Reinhard
No, not SRPP, have described the outputstage above. Read the thread carefully.
An SRPP is more push pull than single ended.
Reinhard
Hello,
I'm very interested in se OTL.
What about KTR circuit?(about " super Totem circuit" I saw in LED magazine.They use as preamplifier, the output impedence is about 5 times lewer than SRPP.
In the next days I'll scan the circuits and I can mail if you are interested.
Another thing :Morgan Lundberg , the audio friend with the link of 519 OTL is very friendly and I think that can help us.
Sorry for my poor english.
Ciao
Guglielmo
I'm very interested in se OTL.
What about KTR circuit?(about " super Totem circuit" I saw in LED magazine.They use as preamplifier, the output impedence is about 5 times lewer than SRPP.
In the next days I'll scan the circuits and I can mail if you are interested.
Another thing :Morgan Lundberg , the audio friend with the link of 519 OTL is very friendly and I think that can help us.
Sorry for my poor english.
Ciao
Guglielmo
Hello,
what is LED Magazine?
Yes I´m interested, mail to
in.audio@gmx.de
What is a super totem and why is the impedance 5 * lower?
Reinhard
what is LED Magazine?
Yes I´m interested, mail to
in.audio@gmx.de
What is a super totem and why is the impedance 5 * lower?
Reinhard
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