Power supply (for Garrard) question

[Bigbird]

Thanks for the insight gents. I wonder if Nick can make a voltage adjustable version. I know a fair few people have talked of the benefits of being able to take the voltage down to around the 220-230v mark in order to get motor vibrations down to a minimum. This is said to have a positive effect . I also think i will try source a 401 motor aswell which is widely regarded as an improvement over the 301.

Has anybody seen the Hanze hifi HAT CPS-2 ? It looks like this is a dutch power supply on the market . I really like the vintage styling but can only find one write up which seems positive. Ive emailed them to ask for some more piccies , prices and specs but it seems to have the best of both worlds with voltage adjustment and analogue oscillators for a clean sinewave




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[Ali Tait]

AFAIK Nick supplies it with 225v output, you could ask about the variable output, pretty sure he could sort that for you.

[Ammonite Audio]

Jaap at Hanze is possibly the most knowledgable and competent person when it comes to idler decks, so his HAT power supply should be one of the best, but I suspect it’s not a cheap option. Well worth investigating though.

[WESTLOWER]

Another LDA quartz TT power supply user here.

It's a no brainer, quality build, No foo, easy to use and very very effective giving the presentation more focus & snap. (if that's what you want from your vinyl!, obv. but an essential question to ask yourself!)

No too sure why you would need it variable voltage, as well documented the optimum seems to be 220 - 230v, which Nick would set to your requirements.

I had a very flexible Variac on my Garrard for a while and below 220v it lost some of the drive that is essentially the Garrad's DNA signature.

Anyway IMHO the cleaning of the power is more important than dropping the voltage.

[Bigbird]

Ive had a word with Alexander at hanze and he has said that the engineer(possibly Jaap?) is on vacation but essentially it can be built fully customised to any spec that suits the TT and motor. Prices are 1600-1900 euros so not cheap, but it does look the business

The reason i was wondering about voltage adjustability is that from what i can gather in reading the forums , people seem to have had good results with a range somewhere between 220-232v so would be nice to have a tinker to see what setting ,if any, sounds best.

I know a few of the power supplies offer this as standard


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[Bigbird]

Does anybody know if its cheaper to buy direct from Nick rather than through MCRU etc ?


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[Ali Tait]

I can mail him for you if you like?

[dave2010]

I'm not quite sure what the requirements are here. Are we talking DC to AC or AC to AC?

Of course some AC -> AC circuits may go via DC.

I suspect it's AC and a good clean sine wave with accurate frequency control may be the requirement. I do actually have a Garrard, recently rescued from my loft, but I haven't looked at the motor to check it out.

Some DC->AC converters don't generate a very clean sine wave, and probably also lose energy which must result in heat.

I wasn't thinking about driving motors, but did look into this some while ago while considering good inverters for use with DC output from PV panels.

[Patrick Dixon]

This is what James sent me with regards to digital sinewaves. That they are in steps so therefore will be noisier.

Sorry but that is simply not true: the 'steps' are filtered by a low pass filter and the output is an analogue sinewave. Any 'noise' (actually harmonics) would be the result of poor filter design.

If you are able to diy, there is a design available on lenco heaven that works well with my 301. Search for Nigel's Speed Controller.
PS. it's analogue too.

[Ali Tait]

I'm not quite sure what the requirements are here. Are we talking DC to AC or AC to AC?

Of course some AC -> AC circuits may go via DC.

I suspect it's AC and a good clean sine wave with accurate frequency control may be the requirement. I do actually have a Garrard, recently rescued from my loft, but I haven't looked at the motor to check it out.

Some DC->AC converters don't generate a very clean sine wave, and probably also lose energy which must result in heat.

I wasn't thinking about driving motors, but did look into this some while ago while considering good inverters for use with DC output from PV panels.

Garrards have AC motors, and yes I’d agree on those requirements.Nicks power supply is basically a small mains regenerator and provides all those requirements.