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Single Ended 2A3/6A3/6B4G DC coupled & Transformer choices
Single Ended 2A3/6A3/6B4G DC coupled & Transformer choices
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Old 7th March 2018, 07:41 PM   #111
RajkoM is offline RajkoM  Bosnia and Herzegovina
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Why too much ???
I like your ideas. When I find a power transformer and order 2A3, I will do something with this amp.
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Old 7th March 2018, 07:45 PM   #112
Perfectusaudio is offline Perfectusaudio  Australia
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Nice to see a 5K load on the 300B - euro21 - once the inductive part of the load is included the suggested resistive load does not always work .
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Old 7th March 2018, 07:50 PM   #113
Perfectusaudio is offline Perfectusaudio  Australia
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inductive plate load ellipse
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Old 7th March 2018, 10:05 PM   #114
RajkoM is offline RajkoM  Bosnia and Herzegovina
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Quote:
Originally Posted by soulmerchant View Post

I think that if one used a "statistical regulator",...

Ian,
What should be the maximum voltage ripple on the input of the statistic regulator?
Is CRC enough before?
I do not have any experience with that regulator.

Thanks
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Old 8th March 2018, 11:35 PM   #115
soulmerchant is offline soulmerchant  Switzerland
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From Morgan Jones' Valve Amplifiers (4th Edition):

"The statistical regulator is certain to have >90dB ripple attenuation, so this corresponds to it tolerating 53Vpk-pk ripple post rectification."


Of course it pays to read his book in full. The circuit is not at all complex and he explains it in great detail.

Ian
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Last edited by soulmerchant; 8th March 2018 at 11:38 PM.
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Old 9th March 2018, 12:54 AM   #116
Bigun is offline Bigun  Canada
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Single Ended 2A3/6A3/6B4G DC coupled & Transformer choices
I thought this thread had ruled out use of sand, the 'statistical regulator' uses a sand based current source. I have thought about using a tube-based CCS but it does make the thing more difficult and if you want anything remotely close in terms of performance I would imagine it getting complicated.
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Old 9th March 2018, 08:04 AM   #117
Hanze Khronye is offline Hanze Khronye  Australia
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Quote:
Originally Posted by pieter t View Post
Specifications are sometimes cleverly "stretched".
When you take a close look at the frequency curve of your example, it is obvious that it includes the first resonance.
The real curve starts falling at about 30 kHz.

Monolith Magnetics ? - simply has to be who else specifies 7Hz - 151kHz so specifically?

THEY state very clearly that stated BW is without resonance, so how to counter that?

Knowing resonance is when Xl = Xc... looking at the (f) vs amplitude plots, how can you arrive at such a conclusion?

I suppose you know this guys math/ physics is at a very high level, Phd level, and he lectures in that/those subject/s.

There is a commercial amplifier which openly admits to using these OPT, claims measured BW out to >140kHz in circuit, retails for 25k USD

The Truth | Whammerdyne Heavy Industries

Have to say that I am leaning toward thinking that you are short on this one.


Hanze.
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Old 9th March 2018, 08:55 AM   #118
Perfectusaudio is offline Perfectusaudio  Australia
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Hi Hanze
Sure you may see something around 100kHz on the Tektronix I have but it will be over 30 dB down
Such a load of crap
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Old 9th March 2018, 09:02 AM   #119
Perfectusaudio is offline Perfectusaudio  Australia
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Default OPT

Old Tektronix TM515
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Old 9th March 2018, 11:18 AM   #120
RajkoM is offline RajkoM  Bosnia and Herzegovina
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Tnx Ian.
I see M.Jones using CLC before his SR.

Perfectusaudio, please apologize for my OT`s.
No more !

Last edited by RajkoM; 9th March 2018 at 11:26 AM.
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