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Old 10th November 2004, 08:14 PM   #21
mcs is offline mcs  Denmark
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After the rectifier you should have 300V according to the schematic. Try to measure what voltage you actually have there.

When you replace the rectifier you may have to add a small resistor between the rectifier output and the first cap (the 40µF part) to make the voltage 300V again.

Best regards,

Mikkel C. Simonsen
My personal electronics website
Remote control kits website
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Old 11th November 2004, 11:51 AM   #22
GeirW is offline GeirW  Norway
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tnx. mcs.. for looking into that.
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Old 14th November 2004, 10:12 AM   #23
GeirW is offline GeirW  Norway
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Anyone care to comment on this Tanberg design.
As far as i know, the Sølvsuper 75, and the Huldra 5,
are both buildt with this design, and uses 2x84
and ecc83. To my knowledge the biggest all tube amps./radios
buildt by Tanberg. But my knowledge about circuts
are still very limited, so i would appriciate any comment.
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Old 20th November 2004, 01:32 PM   #24
GeirW is offline GeirW  Norway
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Originally posted by GeirW

I have tried earlier to attach the shematic,
but the image size is to big.
Am attach it as a zip. for those who are interested.
(never mind the radio part, am going to make a replica
with only the ps/powerstage.)
There have been some slight development in this case,
i recently got hold of a perfect condition 75-20
with mahogny cabinet (without speakers).

This would mean i got spare parts, and that`s temts
me to make that replica.
The problem is that this schematic confuses me,
so if anyone can be a real helper, and separate
the powerstage/ps with simple two innputs
one mm/mc stage and a cd. i would be very greatfull.
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