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Old 29th December 2002, 10:55 PM   #1
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Default Penultimate Zen Hybrid

Hello,

Here is one little different idea for the ZVP3310 subtitution - with
the E88CC/ECC88/6DJ8/6922 Valve.
I did not yet test this modified circuit, but as soon as
I found some time, I will give it a try and see how it will work.

Any comments or suggestions ?

Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
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Old 29th December 2002, 11:01 PM   #2
Bricolo is offline Bricolo  France
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it would need 2 transformers
but it could sound great


PS: what's wrong with the ZVP3310?
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Old 29th December 2002, 11:08 PM   #3
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Kristijan,

I think in order to use e88cc as a buffer you should arrange it as a follower, that is the output is taken from the cathode, therefore no gain, no Miller capacitance, etc.

Regards

Stan
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Old 29th December 2002, 11:08 PM   #4
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Hello,

The two transformers are not a problem.
Also, the 50 V voltage from the unregulated
power supply can be tripled with the capacitors/diodes
to the 150 V or so.

Nothing wrong with the ZVP 3310, but the Zen with
the Valve would probably sound much different.

Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
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Old 29th December 2002, 11:42 PM   #5
djk is offline djk
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Almost 50dB of gain with an input impedance of 820 ohms?
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Old 30th December 2002, 01:21 PM   #6
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... or maybe something like this, with balanced inputs ?
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Old 30th December 2002, 02:17 PM   #7
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I like the idea, but I don't understand your schamtics. Are you shure you didn't make an error?

gr,
Thijs
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Old 30th December 2002, 05:40 PM   #8
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Whow... Zen "Lite" Penultimate.

Kristijan, since I can't find ZVP3310's a change in this direction might be a pretty cool option.

Let me know how thinks work out and how a valve sounds nice
in this setup. I might want to buy a pair of PCB's from you.
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Old 1st January 2003, 11:20 AM   #9
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Quote:
Originally posted by kristijan-k
The two transformers are not a problem.
Also, the 50 V voltage from the unregulated
power supply can be tripled with the capacitors/diodes
to the 150 V or so.
That would be nice, the torroids I bought (by mistake) for my zenv4's are 35-0-35 @ 300VA Amplimo's Torroid.

I was planning to use them as 35-0 @ 600VA.
Another option would be to use one secondairy for the valve(s) and the other for the "Zen".
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Old 1st January 2003, 08:24 PM   #10
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Hello,

Thanks for the response.

I will try to build the Zen-4 with tube on several ways,
and see how it would work.

I ordered the 6DJ8 tubes, together with the other ones
for the OTL that is on my website, and when they arrive
we will see if this is a good way to go.

Anyone know for the good program that can simulate
this kind of circuit ?

Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
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