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Old 12th October 2005, 03:58 PM   #1
6072a is offline 6072a  Austria
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Default Linn Valhalla

Hi Everyone,

Can anyone help with the component values for the Linn Valhalla ?
What values have R33,C5,C21?

Regards Alex
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Old 13th October 2005, 04:10 PM   #2
dhaen is offline dhaen  Europe
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Old 13th October 2005, 08:03 PM   #3
al2002 is offline al2002  India
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If I may piggy-back on this thread, anyone have a schematic for the Valhalla board?

I have one that no longer works, with what looks like a charred power resistor. I expect something else is fried too, but don't know what.

Thanks.
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Old 14th October 2005, 01:59 PM   #4
SvErD is offline SvErD  Norway
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Default Re: Linn Valhalla

Quote:
Originally posted by 6072a
Hi Everyone,

Can anyone help with the component values for the Linn Valhalla ?
What values have R33,C5,C21?

Regards Alex
I have the diagram without component values.
On my board the values are:
R33 = 180k
C5 = 220pF? (red-red-blk-gold-blk)
C21 = 3.3nF? (orn-orn-red-silv-gold)
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Old 14th October 2005, 03:45 PM   #5
6072a is offline 6072a  Austria
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Default Linn Valhalla

Hi SvErD,

Thanks a lot.

alex.
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Old 15th October 2005, 02:01 PM   #6
munja is offline munja  Croatia
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Wink Valhalla values

R33=330 kiloOhms

C5= I am not sure, low value (probably hundreds of pF)

C21= I am not sure, low value (probably hundreds of pF)


regards
Munja
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Old 20th December 2016, 05:36 PM   #7
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Default Button Tactile Switch Unit for Valhalla (Linn LP12) - Custom Made Parts or not ?

I am looking for this switch parts (LED, knob, blend, pcb so as the associated flex connector).
Where I can order this parts?
Thank you for aqdvices.
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Old 20th December 2016, 07:45 PM   #8
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Have a look here for the schematic:

Linn

Good Luck
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Old 21st December 2016, 09:32 AM   #9
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One upgrade you might try when repaired is to upgrade the 47uF 250V ( 0r 200V in some ) to 220uF. It seems not to cause any problems and reduces hum by about 6dB or better ( see graphs ). One can not see this hum usually as it is close to the 50 Hz reference, it will be seen if 60 Hz mains and is about at - 40 dB. There are 3 caps of this type, the two that run across the PCB are prime and see about 320 VDC. When cured the sound is better, wow I guess. Subtle and could be imagined as the belt should deal with this.

One small modificaton that can help is a floating isolated transformer supply ( centre ground worse!). Either 230 or 115VAC will do fine ( set fuse on PCB to suit ). The distortion of the Valhalla is about 0.05%, not bad. Alas how the motor draws current makes that rather unimportant. Nice all the same it works this well. I have tried many mods and these are the ones that work.The displaced graph is how I found this when trying 45 RPM ( best not to as it seems a step too far for ones who tried it ). I put the 220uF in quickly to test with the 47uF Linn fit, just 220uF 250VDC works fine. I tried other modes which gave small returns so not listed. One was a PSU for the oscillator, nice if keeping power use down. Otherwise not worth it.

The larger sound difference is the output voltage. 90VAC( rms ) is about the best as in the early Valhalla. Some play with the blue phase capacitor ( 220nF ). I think voltage more important.

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