Be careful about upsizing the uF on the coupling caps too much. The
power supply was built to expect a certain load, and if the
capacitance on the +- rails doubles, you could stress things when
powering up.
If there are 10-15 caps per rail, per channel, and you have 36
channels, things will quickly add.
I am a fan of increasing the BP caps in value.
Greg Norman
Professional Music Listener
Electrical Audio Recording
773.539.2555
www.electrical.com
On Nov 1, 2008, at 5:34 PM, Frank Moscowitz wrote:
I'm about to start recapping a Series 1E - I can only offer my
previous experience with other desks as I haven't started this one
yet - you're on the right track taking care of the master section
and power supply first - the only thing I can add is try one thing
at a time and listen. This is the only way to arrive at what you
personally will favor.
On Tue, Oct 28, 2008 at 8:11 PM, Ike Zimbel
<[EMAIL PROTECTED]> wrote:
Hi Paul,
Since no one else is tackling this: If you can fit the WIMA
caps in other places where there are 10uf non-polar caps, you will
not regret it. For the de-coupling caps (probably 2.2uf/50v, these
are the polarized caps near each chip), any larger cap is an
upgrade. 10uf is stock in the later boards. I have used 22uf, 33uf
and 47uf all to good effect. Use good quality caps here...usually a
105 degree temperature rating is at least some indication of lower
ESR (which is a good thing).
Good luck,
Ike
SAR wrote:
This is for all out there in Neotek land—
I have a Series 1, and I have replaced some of the chips with
BurrBrown 627's at the bottom of each channel, and in the master
section. I kept the TL074's in the pre and EQ section of each
channel.
It made a stunningly wide sound stage. I was impressed. I am now
recapping, and have done the master, power supply, and 1 channel,
but I am using the original Nichicon's; and original values—with
one exception:
I am using WIMA 10uF MKS polypropolene series (they are brand new
small designs) for the non-polars near the BB 627's.
What I need to know is what caps to bypass, and what values to
upgrade; and in what places.
Can anyone give me any suggestions?
It is an 16X8 motherboard '84 Series1, with 6 older 1E ribboned
channels modified to molex.
Thanks for any help-----
Paul Sinclair
--
Ike Zimbel
Zimbel Audio Productions Ltd.
Toronto
416-720-0887
"Studio House Calls" - Repairs and upgrades to analog audio
equipment including: Amek, Allen & Heath, Neve, Neotek, MCI,
Soundcraft and more.
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