MY PARADISE - Page 3 - 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 15th November 2012, 09:45 AM   #21
diyAudio Member
 
Bksabath's Avatar
 
Join Date: Dec 2007
A few test first

This is based on my set up with Selectronic transformers (not really good)
Supply
Right +34.2 -34.4

Left +34.4 -34.6
The paradise regulator take care of difference and supply to Phono is set at 18.001 + - on both

The CRC stage has 5 Homs resistors between capacitors (2 X2200 uF FM type)
V drop across resistor is 718 mV

No lid on box
Right with cooper sink extension
Left no sink extension
Overview off set up

With my set up (Selectronic Trafos nominal 24 V in reality those have same random V out (about 29 V AC under Paradise load))

34 V to the boards causes the sink to go up to 50.1 C
Using the cooper Extension helps and the temperature is down to a 37.1 C

This is whiteout lid in pretty cold loft.

Paradise for Dummies (like me) Notes

1) If you can do not feed the boards with 34 V
2) If traffos are to hi further CRC stages help and supply is cleaner I got CRC cable CRC (on board supply is quite good so proper trafos and no to many CRC work fine )
3) Take your time setting up the clean supply voltage (+ - 18 V) as when sink warms up it does drift a bit
We reserve the right to ramdomly use spell cek
Attached Images
File Type: jpg Sink temperature 002.jpg (991.4 KB, 391 views)
File Type: jpg Sink temperature 001.jpg (908.3 KB, 373 views)
File Type: jpg Sink temperature 003.jpg (887.9 KB, 346 views)
  Reply With Quote
Old 15th November 2012, 10:55 AM   #22
diyAudio Member
 
Bksabath's Avatar
 
Join Date: Dec 2007
You May ask yourself Talking Heads - "Once In A Lifetime" - YouTube
what the fuss is all about.

Lid on, sink temperature with no extentions.

Paradise for Dummies (like me) Notes

1) Heath inside case make components age faster and causes voltagge drifts
2) MC RIAA stages need good screaning
3) Holes in case compromise screaning and air currents cause voltagge drift
(just blow on input transistors to find out)

I am going to take a few turns of the transformers so to drop the voltagge
it is easy enough to do with race cores.

PS UK mains is 240 V AC nominal so if not in the UK you may be ok
Attached Images
File Type: jpg Sink temperature lid on 001.jpg (978.7 KB, 320 views)
File Type: jpg Sink temperature lid on 002.jpg (877.5 KB, 297 views)
  Reply With Quote
Old 15th November 2012, 12:30 PM   #23
diyAudio Member
 
Joachim Gerhard's Avatar
 
Join Date: Mar 2009
That`s hot !
  Reply With Quote
Old 15th November 2012, 02:05 PM   #24
diyAudio Member
 
Bksabath's Avatar
 
Join Date: Dec 2007
Yes it is other sink is at 48 C with extra fins
So, no much fuss needed to get existing one working, I am going to drop a couple of Volts from the Trafos and it will be OK

Phono section is going to be inside a box inside a box, so isolated from heat off the power suply
  Reply With Quote
Old 15th November 2012, 04:38 PM   #25
FdW is offline FdW  Netherlands
diyAudio Member
 
FdW's Avatar
 
Join Date: Feb 2009
Location: Both feet on the ground (near Gouda)
Quote:
Originally Posted by Bksabath View Post
Yes it is other sink is at 48 C with extra fins
So, no much fuss needed to get existing one working, I am going to drop a couple of Volts from the Trafos and it will be OK

Phono section is going to be inside a box inside a box, so isolated from heat off the power suply
You should allow for 220 to 240Vac on the mains, the minimum input voltage for the PSU is 26Vdc and that needs an 18Vac transformer. Then I would say you need a 18Vac @ 220Vac(mains), what will be a 20Vac @ 240Vac(line). The dc voltage at the PSU will then be about 29V (or there about). I would say, the 34V you mentioned is a wee bit high (about 5 wee bits) (where 1 wee bit = 1 volt )
  Reply With Quote
Old 15th November 2012, 04:42 PM   #26
FdW is offline FdW  Netherlands
diyAudio Member
 
FdW's Avatar
 
Join Date: Feb 2009
Location: Both feet on the ground (near Gouda)
Quote:
Originally Posted by Bksabath View Post
Yes it is other sink is at 48 C with extra fins
So, no much fuss needed to get existing one working, I am going to drop a couple of Volts from the Trafos and it will be OK

Phono section is going to be inside a box inside a box, so isolated from heat off the power suply
But locking in it's own heat
  Reply With Quote
Old 15th November 2012, 11:07 PM   #27
diyAudio Member
 
Bksabath's Avatar
 
Join Date: Dec 2007
The 68 C was taken right on top of the regulators To220
Extra fins = - 20 C (again temperature taken in worst possible place )

I am going to get new trafos most probably 20 V ac as I like the extra CRC

It can drop 2 wee bit Volts with a 15 Homs resistors on the CRC with the advantage of less riple

Regulators run at about 146 mA

No much heath in the box inside the box as it is a Cooper Box about 27 C on current mirrors.

Still to hot for Summer time... but more ventilation may cause drift with changes in temperature

By the way Voltagge (Regulated) goes down a fraction of a wee bit as regulators warm up this is constant on + and - rails and on 2 chanels so no big problem there Just set up 20 mV higher before lid is on seems right in my case

Eventualy I may mesure up V against C but most important
Offset at the input is at 0.2 mV or 0.0002 V with a 100 Homs resistor used for Cart Loading and is prety steady so quite happy with that.

Last edited by Bksabath; 15th November 2012 at 11:14 PM.
  Reply With Quote
Old 16th November 2012, 06:30 AM   #28
FdW is offline FdW  Netherlands
diyAudio Member
 
FdW's Avatar
 
Join Date: Feb 2009
Location: Both feet on the ground (near Gouda)
Quote:
Originally Posted by Bksabath View Post
By the way Voltagge (Regulated) goes down a fraction of a wee bit as regulators warm up this is constant on + and - rails and on 2 chanels so no big problem there Just set up 20 mV higher before lid is on seems right in my case
That is as expected, the PSU is not temperature compensated. It should have little to no effect in the pre-amp.
  Reply With Quote
Old 23rd November 2012, 05:04 PM   #29
diyAudio Member
 
Bksabath's Avatar
 
Join Date: Dec 2007
Quote:
Originally Posted by Joachim Gerhard View Post
Let´s see how it sounds.
Sound prety good (may remind audience to look up Londoners meaning for that is allright)

Improvment over single trafo is noticeable firmer sound stage is quite evident.

No did not get a chance to play many traks on it and still running prety hot as trafos are still as before.

Any way I got my R3 boards so I realy have to start on it.

First thing I am going to do is sort out the Transistors
I tried the Atlas a curve tracer and the litle test circuit as on the guide.

So far a small batch of NPN

any way
Atlas sems to be on the low side
Curve tracer is ok on NPN (did have problems with PNP) mesure 455 (sorry for picture quality
Litle circuit mesure 463

So score is :

I like litle circuit a loooooooot
no much difference from curve tracer and extra super duper precision is not needed as if 2 transistors mesure the same they be the same, altrought with small error due to resistors tollerance.

Only snag they need same tyme to setle but for one that is only going to build paradise to listen to his record collection the litle circuit is prety good
Attached Images
File Type: jpg NPN mesure 001.jpg (926.9 KB, 105 views)
File Type: jpg NPN mesure 002.jpg (823.7 KB, 92 views)
File Type: jpg NPN mesure 003.jpg (472.3 KB, 73 views)
  Reply With Quote
Old 29th November 2012, 11:44 AM   #30
diyAudio Member
 
Bksabath's Avatar
 
Join Date: Dec 2007
Borowed TT
She is out babysitting so suprise ready for later.
Do not worry in case of major hearth quakes or sonic boom.

Difference is amazing compared to my old TT and Paradise is well wort it

I am still listening to very hot R2 it has been on since early this morning and no smoke so far.

I am open for sugestions on new TT up to £2 k

any beter than Rega P9?
Attached Images
File Type: jpg NPN mesure.jpg (706.5 KB, 154 views)
  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
Paradise Builders Joachim Gerhard Analogue Source 3544 8th July 2014 05:14 PM
Paradise phono stage hesener Group Buys 1309 25th June 2014 03:23 PM
DIY Paradise Charlize Jolojl Swap Meet 7 7th December 2006 06:42 AM
Diy Paradise! alexmoose Tubes / Valves 3 24th July 2006 04:37 AM
Another way to paradise ? Bernhard Pass Labs 3 8th August 2003 10:19 PM


New To Site? Need Help?

All times are GMT. The time now is 08:02 AM.


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