Mini-anni progress

light fantastic
Post Reply
tim_bissell
senior member
senior member
Great Britain
Posts: 784
Joined: 04 Aug 2009 23:08
Location: Cambridgeshire, England

Mini-anni progress

Post by tim_bissell » 12 Feb 2012 16:54

My prototype mini-anni is up and running, and sounding pretty good. I finally got around to shipping a design off to my friendly local CNC routing shop, and he's cut me some inner plinth layers and some baseboards.

I won't get a chance to work with them until the weather warms up, but here they are 'raw'.

Note the extra cutouts; these are to allow their use with PT Vector subchassis.

-- Tim

P.S. Looks like this Export sub chassis was subjected to some 'Linn' tightening [-X - let that be a lesson to us all!

http://www.lotsov.webspace.virginmedia. ... _parts.jpg
http://www.lotsov.webspace.virginmedia. ... _above.jpg
http://www.lotsov.webspace.virginmedia. ... ective.jpg

Eric van Spelde
member
member
Posts: 96
Joined: 24 Dec 2008 10:20
Location: Rotterdam

Re: Mini-anni progress

Post by Eric van Spelde » 14 Feb 2012 16:48

Nice... (not the armboard bolt tightening o'course) ... :)

SimonLogan
member
member
Posts: 88
Joined: 09 Sep 2009 13:42
Location: N. Ireland

Re: Mini-anni progress

Post by SimonLogan » 24 Feb 2012 23:26

Tim and I tried a blind listening test of the following turntables, as Tim described them:
PT1 (1985 model with Escap motor) and Maplin linear regulated PSU.
PTMA (based on a 1984 model with Escap motor) with my linear regulated PSU.

both with:
Funk 5mm achromat
Funk FXRII and AT-33PTG cartridge

so the only difference is in my Anni-like plinth and suspension, carbon/balsa sub chassis carrying motor and spindle, and the PSUs.
Tim sent me two sets of recordings, with no information to identify which was which. In my listening tests I consistently preferred the one which turned out to be the PTMA. It had a good deal more bass, and sounded punchier with a better tonal balance. Voices and treble were very similar; I had a slight preference for the PTMA on some tracks.

Overall a very worthwhile improvement in sound quality. Could I have a kit please Tim? :)

Simon

tim_bissell
senior member
senior member
Great Britain
Posts: 784
Joined: 04 Aug 2009 23:08
Location: Cambridgeshire, England

Re: Mini-anni progress

Post by tim_bissell » 25 Feb 2012 20:33

Hi Simon,

Thanks listening and for the kind comments; for reference, these recordings were recorded with an Edirol (Roland) FA66 firewire ADC, at 96KHz/24bit on an iMac using Audacity, with no manipulation except a bit of fade in/out at the start/end of track.

A kit may well be beyond me given the internal variations of the PT1, but a complete set of parts and some written/illustrated guidance for a confident and well-equipped DIYer, (as well as a conversion or part-exchange service) may well be in the offing :wink:

-- Tim

SimonLogan
member
member
Posts: 88
Joined: 09 Sep 2009 13:42
Location: N. Ireland

Re: Mini-anni progress

Post by SimonLogan » 26 Feb 2012 19:22

tim_bissell wrote:Hi Simon,
Thanks listening and for the kind comments;
No problem, it was fun.
tim_bissell wrote: A kit may well be beyond me given the internal variations of the PT1, but a complete set of parts and some written/illustrated guidance for a confident and well-equipped DIYer, (as well as a conversion or part-exchange service) may well be in the offing :wink:
I'd definitely be interested in the conversion or p/x services if you develop them Tim. Realistically with the ages of my kids I'm never going to get the time to do that kind of conversion myself.

Thanks,
Simon

Post Reply