Micro Seiki 1500 - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 22nd October 2003, 08:32 PM   #1
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Default Micro Seiki 1500

Please help...

I just "found" a RX 1500 w/ Rega-arm, and it needs a little attention.
And maybe some "tweaks".
My own suggestions: New PSU, and make a groove on the lower part of platter to hold a thick O-ring (damping). ???

Other suggestions?

Arne K
__________________
Don't believe everything you think...
  Reply With Quote
Old 23rd October 2003, 02:39 PM   #2
diyAudio Member
 
Join Date: Feb 2003
Location: Connecticut
If you do any tweaks, please report on your findings. But its not the easiest table to remove the platter from. The manual would be helpful for this task, and if you don't have the manual, I believe it is downloadable at Vinyl Engine.
  Reply With Quote
Old 23rd October 2003, 03:12 PM   #3
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Default Very easy...

It is similar to this (picture), with alu-platter.
Had a look at motor & psu, and revised my plan to re-new all el-caps. And a filtered IEC plug.
Next step here would be a all new motor-unit...?

For the platter; I will have to check with my friend which is a magician on the lathe...

Arne K
Attached Images
File Type: jpg rx-1500.jpg (30.5 KB, 851 views)
__________________
Don't believe everything you think...
  Reply With Quote
Old 23rd October 2003, 06:08 PM   #4
diyAudio Member
 
Join Date: Jan 2001
Location: Scandinavia
How much did you have to pay?
What was the condition?

Envious Petter
  Reply With Quote
Old 23rd October 2003, 06:28 PM   #5
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Cool About $ 350+ = "cannot resist" - price.

Condition: worn, but not bad...and modified by an amateur...

Luckily it seems that the mods are easy to rectify, (in the process).

Arne K
(Can resist ANYTHING! (-but temptations)).
__________________
Don't believe everything you think...
  Reply With Quote
Old 24th October 2003, 03:41 PM   #6
diyAudio Member
 
Join Date: Oct 2003
Location: N.Wales
I have modded this platter as I had a spare for my Rx1500. The standard aluminium piece is a bit resonant so I added a layer of lead underneathand then filled the remaining cavity with plaster of paris. Depending on how carefull you are, the balance may need correcting although its not absolutely critical at these slow rotational speeds. The effect was good - firming up the soundstage and increasing the dynamic range by virtue of a quieter background.
I also have a plinth wieght that bolts to the underside of the plinth casting. However its not fitted at the moment as I dont think it will be compatible with the standard suspension springs. I need to source some heavier springs to maintain the system frequency.

Colin A.
  Reply With Quote
Old 29th October 2003, 04:17 PM   #7
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Default Progress...

My M-S have now been in "atoms", and rebuit, working perfectly.
Damper-feet have been greased with new silicon-grease(Molykote-111), main-bearing has been cleaned and refilled w. Mobil 1 synthetic automatic trans-fluid.
When giving the platter a slow hand-spin, it runs for several minutes!

Next step: platter...
Somewhere I had a nice formula for making a strobe, but cannot find it, can somebody please suggest how many marks on a given diameter I need? (50Hz)
(Planning to machine small marks on lower edge of platter)

Arne K
__________________
Don't believe everything you think...
  Reply With Quote
Old 29th October 2003, 04:40 PM   #8
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Talking The bearing...


see the dimentions...and perfect machining!
(never mind my finger-print on the main-shaft...).
Shaft is ~ 16mm

Arne K
Attached Images
File Type: jpg m-s-bearing.jpg (59.6 KB, 711 views)
__________________
Don't believe everything you think...
  Reply With Quote
Old 29th October 2003, 06:09 PM   #9
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Default Re: Progress...

Quote:
Originally posted by Cobra2
Next step: platter...
Somewhere I had a nice formula for making a strobe, but cannot find it, can somebody please suggest how many marks on a given diameter I need? (50Hz)
(Planning to machine small marks on lower edge of platter)
SDS Labs has a downloadeable strobe for 50 & 60 Hz.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 29th October 2003, 07:05 PM   #10
Cobra2 is offline Cobra2  Norway
DIY !
diyAudio Member
 
Cobra2's Avatar
 
Join Date: Apr 2002
Location: Stavanger, Norway
Send a message via Skype™ to Cobra2
Default found it...

a better one here: http://www.78rpm.com/pages/rescat/audio/strobe.htm

Arne K
__________________
Don't believe everything you think...
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Micro Seiki Tonearm. MiiB Analogue Source 2 28th May 2007 03:14 PM
Another Micro Seiki restored! Cobra2 Analogue Source 1 1st October 2005 10:06 AM
Micro-seiki DQX-500 gotster Analogue Source 0 11th January 2005 07:44 PM
Micro Seiki MC ktigerb Analogue Source 0 27th May 2003 09:16 AM


New To Site? Need Help?

All times are GMT. The time now is 09:48 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2