regarding LINN LP12 power supply.

[jenson]

guys, may i know what is the difference between a Valhalla and Online UPS ?

Frequency Range: 50Hz 0.2%
Waveform: Pure Sine Wave

 

[2chFreak]

Valhalla

good design with bad parts introduced in 1982.

1990, Lingo was the ideal replacement hence valhalla became "history"

 

[jenson]

good design with bad parts introduced in 1982.

1990, Lingo was the ideal replacement hence valhalla became "history"

my question has more to do with the difference between a online ups and the valhalla or hercules

 

[2chFreak]

my question has more to do with the difference between a online ups and the valhalla or hercules

i wouldn't try to get so innovative & pull such a stunt & am aware of the many who rely on their day-in day-out listening on a Lingo.
Rest upon you.

 

[G401fan]

What you have is a switch that does not work.

Search for a spare switch on Ebay. Linn does not manufacture them anymore..

If you do find one, you'll be able to dispense with the the direct power supply that you have now. It' still a Valhalla board, and it's pretty darn good.

regards,

 

[2chFreak]

GreenStreet Audio

 

[jenson]

I guess I didn't elaborate...and pls pardon me as my tech know how is limited to nil... I read Valhalla provides power at 120 volts , pure sinwave, at 50 hz.....well, online ups in the link does the same...least on paper...

My table works just fine, yes, as g401, mentioned, not the switch, tht I don't care much... I was researching more on hercules and stuff and didn't understand the difference between a online ups and a Valhalla/Hercules

 

[Gerry_the_Merry]

Since you seem to have recently bought the Linn, chucking Valhalla and considering a UPS is a bit like learning swimming by beginning with deep sea diving. I would advise that you install a simple cartridge and begin listening, before delving into rocket science.

 

[stevieboy]

I get what Jenson is saying. It's something I've always wondered about also. What really is the practical difference that a turntable sees between a dedicated power supply and an online ups? After all both provide the right voltage and the right frequency. An online UPS also filters the ac so it's clean power the TT gets. Am assuming the linns power supply is fixed unlike some for the garrard where one can vary the voltage to reduce torgue and vibration. Not sure of the voltage selection range in an online UPS.

Advice to chuck this or do that is not really germane to the question Jenson has asked.

Regards

 

[Hiten]

An ac motor needs pure (Purest of pure for audiophiles ) AC sinewave with precise (Again most precise for audiophiles) frequency so as turntable motor runs at constant speed and torque. Difference between UPS sinewave and Linn Power supply is precision and an effort to keep that precision. I don't think UPS Sinewave will have that much precision. Maintaining constant frequency and perfect sinewave is a challenge I think. A class a amplifier can produce AC sinewave and some DIY turntable makers use them.

Sidenote : In audiophile hobby getting the last bit perfect and longing for bestest of best is not good for the wallet :lol:
Regards

 

[Gerry_the_Merry]

I see. I was under the impression he already has a Valhalla board he is considering dispensing with.

 

[Gerry_the_Merry]

Hiten is a bit more (a lot more, actually) articulate than me...

 

[G401fan]

Check out this link to get some funda on the Valhalla PS:

http://www.theanalogdept.com/images/spp6_pics/Linn/Valhalla Repair Manual.pdf

If an online UPS does what's indicated for the Valhalla PS, then go right ahead.

As I understand it, your power cord is now directly connected to the Valhalla board, instead of doing so via the off/on switch which has stopped functioning. So, your mains power off the wall is still being regulated by the Valhalla board. Adding a UPS does not do anything for this situation.

Now, on the other hand, if you bypass the Valhalla board and connect the motor directly to an online UPS, I'm not sure what's going to happen. If that was a viable option, there'd never have been a need to develop Valhalla, or Lingo, or now Radikal.

I had the same switch problem (after 20 years of using the Linn), and had to wait for a few months to snag one off eBay.

 

[Gerry_the_Merry]

there'd never have been a need to develop Valhalla, or Lingo, or now Radikal.

Art Dudley says that with the Radikaal added onto an entry level config, it is directly upgraded to the highest level an LP12 it can reach, implying that of all the upgrades that can be done, this one is the most important...

 

[jenson]

thanks much everyone, yes, stevie articulated it right.

i do not have a valhalla... here is a pic of my setup -

as of now, the switch is bypassed and the circuit is powered directly. so i switch the mains and platter starts spinning. so my question again was...would it make a difference if i introduce a UPS in the chain...

 

[Gerry_the_Merry]

Some clue for you Jenson - see page 44 of the 58 page manual.

Linn LP 12 Sondek Owners Manual, Service Manual, Schematics, Free Download | Vinyl Engine

 

[Gerry_the_Merry]

"as of now, the switch is bypassed and the circuit is powered directly. so i switch the mains and platter starts spinning"

This is downright dangerous. The motor is a very delicate low power motor. Any voltage surge will threaten the motor. Secondly I am not sure about the wisdom of feeding 220V into the motor. I think the power supply is also supposed to do a step down, considering the low power consumption in question.

 

[jenson]

"as of now, the switch is bypassed and the circuit is powered directly. so i switch the mains and platter starts spinning"

This is downright dangerous. The motor is a very delicate low power motor. Any voltage surge will threaten the motor. Secondly I am not sure about the wisdom of feeding 220V into the motor. I think the power supply is also supposed to do a step down, considering the low power consumption in question.

hi GTM, thanks for your notes man...well, i assume this the british version and not the US...hence i guess 220V should be ok...also, i have only bypassed the switch...even if the switch were to function, it wouldn't be any different i assume...

 

[Hiten]

Now that you are driving the AC motor directly a power regulation would help. I would protect Linn Motor at any cost.

would it make a difference if i introduce a UPS in the chain...

That depends on the UPS. Cheap UPS/inverter have square wave output and can easily be identified (When electricity is gone) watch the ceiling fan if it makes noise its square wave.
I have no technical knowledge but using oscilloscope one can look for good power source by measuring it.
Regards

 

[jenson]

what i gather so far is...there is no sure way to tell if there is a difference between valhalla and onile UPS such - Online UPS

according to the specifications on microtek, it quotes
Waveform - Pure Sine Wave
Frequency Range - 50Hz 0.2%

Voltage Range:
When load < 50%, range is 1185VAC~2955VAC
When 50% load, input range is 1605VAC~2955VAC


all said, im just trying to understand the difference... i do however realize that radikal and lingo are much more advanced and have been designed to serve a specific purpose with Linn Motors.