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Old 27th July 2012, 10:39 AM   #591
dady is offline dady  Argentina
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I just guessing what was happening with this season.
A heat wave invades Europe and come to the south! I said my self something different happen in Holland"
Just happen a month the hot sumer became unsupportable.
LOL! and congratulations.
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Old 19th September 2012, 04:21 PM   #592
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Hi!
Which 6BL7 use instead? Soviet tube should.
Thanks
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Old 20th September 2012, 02:52 AM   #593
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Default Driver V4 Voltage

In the final MullardEL34 schematic, post 247 and attached, the effective Vpp voltage across the driver 6SN7 V4 is 620V. If the grid bias voltage on the final 6AS7s is in the range of -65V to -75V for Class A (say -70V), as delivered at the cathodes of V4, then the net voltage across V4 is about 380V. Seems awfully high as the 6SN7 spec sheet says 300V max. What am I missing?
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Old 24th September 2012, 07:10 AM   #594
TV7 is offline TV7  Australia
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Quote:
Originally Posted by aardvarkash10 View Post
tubes able to deliver a LOT of current, preferably at relatively low operating voltage. Big horizontal sweep tubes come to mind...
Tell me more
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Old 24th September 2012, 09:00 AM   #595
PET-240 is offline PET-240  Australia
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G'day TV7,

You just up the road from me.....

It'd be easier to read the thread, there is so much here, first 6-8 are really interesting, currently sorting my trannies for a set of M60 clones as the NO NFB attracts me.....a lot. I have a set of other OTL monoblocks in build stage as well when I came upon this thread. I could give you basics but it's worth the read.
Pm me and could have a yarn.

Cheers,

Drew.
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Old 20th January 2013, 07:50 PM   #596
BUIZERD is offline BUIZERD  Netherlands
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Anyone bulding these amp's????
It's a little bit silent here.
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Old 20th January 2013, 08:41 PM   #597
PET-240 is offline PET-240  Australia
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I have been collecting parts, talking to Ralph at AtmaSphere, he has been very helpful and understanding, did me up a mini kit with the factory instructions, very generous indeed.
Hoping to complete by June.
Yourself?
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Old 20th January 2013, 09:07 PM   #598
BUIZERD is offline BUIZERD  Netherlands
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As you can see in my avatar, I have them up and running for a while now, and i'm very satisfied, I have only a very small hum in the background, but that's because I do not have a balanced preamplifier.
Is it perhaps possible to share your talk with Ralph with us, we don't see him so often on this board lately.

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Old 20th January 2013, 09:30 PM   #599
BUIZERD is offline BUIZERD  Netherlands
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Here you go
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Old 20th January 2013, 09:36 PM   #600
BUIZERD is offline BUIZERD  Netherlands
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Here's another one.
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