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Need help with Linn Valhalla repair
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Old 30th January 2005, 10:20 PM   #11
munja is offline munja  Croatia
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Default LP12 VALHALA

Hello all,

does anybody know a value of the resistor R26 of the VALHALA PSU board?

Regards

munja (Robert)
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Old 7th August 2008, 10:12 AM   #12
Butch1970 is offline Butch1970  United States
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Default Valhalla repair

Resurrecting an old thread here.....

I'm planning on replacing the three capacitors in my Vallhalla board. I have a schematic for it, but a more detailed "parts list" would be helpful. I know the values of the capacitors, but would like to get something as close to the original spec as possible.

Any info about them - or where to purchase them - would be greatly appreciated!
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Old 6th December 2008, 03:23 PM   #13
frolic is offline frolic  United States
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Default valhalla

oh dear. does anyone have a -simple- schematic for a 50hz ps to replace the valhalla i am trying to, once again, repair?

thanks
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Old 8th December 2008, 05:38 PM   #14
PL135 is offline PL135  South Africa
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Default Valhalla Repair

Munja

R26 is a 22R 0.5W 1% Metal Film.


Butch1970

RS Components do a nice BC 47uF 450V axial capacitor that I have used to great effect.


Frolic

Do you have a circuit diagram? The Valhalla PCAS 022 diagram (available off the net) is representative of the latest Valhalla's and all the component values are shown. The Valhalla is quite reliable once sorted and will give you many years service. I would recommend that when changing the bridge rectifier, you replace with a 6A 1000V device. This is far more robust and reliable. The three large 47uF caps should be 450V devices as apposed to the 250V devices often used, this improves the reliability too! Don't give up, it's worth doing.

Hope this helps

Regards
Peter
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Old 8th December 2008, 06:38 PM   #15
frolic is offline frolic  United States
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ciao peter. thanks so much for the info re higher v caps and rectifier. i have replaced the 3 caps and the 2 ww 15k resistors and all is well! adjusted for 85v and works like new, ie. takes a few seconds to get up to speed... but nice.
peace,
ed
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Old 10th December 2008, 03:47 PM   #16
frolic is offline frolic  United States
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uh oh... after several hrs of operation the 47ohm R1 resistor burned up .. does this mean the bridge rectifier is fried???
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Old 10th December 2008, 11:29 PM   #17
frolic is offline frolic  United States
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Default lp12 60hz motor and spindle needed

well now i have great need for a 60hz motor with pulley. the valhalla board is kaput (regardless of my last post..) and i can't get the 21mm spindle off the 50hz motor so i could replace it with a 17mm piece i made...

figured for now to just go with a 60hz motor off the mains through a 47m cap and
a .1 across the r - b windings. maybe a resistor to drop the v a bit. but a motor seems not to be easy to find. and i don't want to destroy the good 50hz set up for
somebody with a valhalla.

peace

ed
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Old 11th December 2008, 01:11 AM   #18
vinylkid58 is offline vinylkid58  Canada
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Quote:
Originally posted by frolic
uh oh... after several hrs of operation the 47ohm R1 resistor burned up .. does this mean the bridge rectifier is fried???
Were you running a new rectifier, or using the original?

Jeff
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Old 11th December 2008, 01:41 AM   #19
frolic is offline frolic  United States
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no a new rect. 400piv. perhaps not enough?? my head hurts. and i can't believe i can't fix a simple @##^%power supply prob. age i guess.... i thought it might be one of the xsitors at the output. it's really a 50hz amp after all... so am now disconnecting everything and then reconn incrementally... however we'll see. in the mean time i figure i can get it up and
playing those heifitz vinyls while i get a real solution.

thanks.
peace,
ed
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Old 11th December 2008, 01:52 AM   #20
vinylkid58 is offline vinylkid58  Canada
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I recently found a thread on another forum (pink fish maybe), that discussed the need to replace the stock rectifier with a more robust one. I'll look around and see if I can find the thread.

Jeff
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