Soft start + switch on PCB - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 21st April 2007, 07:00 AM   #11
Dante is offline Dante  Canada
diyAudio Member
 
Join Date: Aug 2005
Hi to all diyaudio folks,

This is my first post on diyaudio. Lots of great stuff.

Hello smithy666, your circuit seems great. I'm very interested in your soft-start circuit, but I need a 120 / 240 volts version.
Can you accept to send me the schematics. This way I will be able to modify and adapt it to my needs.

Thanks

AL
  Reply With Quote
Old 21st April 2007, 07:41 AM   #12
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
The transformer which is used has 2 x 115 VAC primary. Not so hard to change to 120 VAC in. Nice work by the way
__________________
/Per-Anders (my first name) or P-A as my friends call me
  Reply With Quote
Old 23rd April 2007, 11:38 PM   #13
Dante is offline Dante  Canada
diyAudio Member
 
Join Date: Aug 2005
Hi,

Did you have any price idea for the three possible ways for your circuit ?

thanks,

AL
  Reply With Quote
Old 24th April 2007, 12:51 AM   #14
diyAudio Member
 
Join Date: Mar 2001
Location: Sydney
Hi Dante
I haven't got a schematic in a form that I can easily post at this stage, but I will get around to it (another thing on the list...).
The bare PCBs I can do for US$20 each. I'll work out today the price for all the parts & PCB, and then also fully assembled and get back to you.
P-A is correct - the transformer has dual 110V primaries, so you would need to cut a track and parallel the windings. One other change is necessary - you would need to change a couple of compnent values in the voltage divider section for the soft start, but that would be straightforward.
  Reply With Quote
Old 24th April 2007, 03:26 AM   #15
Luke is offline Luke  New Zealand
diyAudio Member
 
Join Date: Sep 2001
Location: Wellington NZ
Send a message via AIM to Luke
Hi Smithy,

Whats the spacings of the transformer, will a jaycar one fit?

cheers ab
  Reply With Quote
Old 24th April 2007, 04:27 AM   #16
diyAudio Member
 
Join Date: Mar 2001
Location: Sydney
Hi ab
Not sure. Dimensions of the Block FL6/6 are 53x44. Datasheet with pinouts etc are here http://docs-asia.electrocomponents.c...6b8002776f.pdf
The Block FL6/6 is available from RS Components for about A$25 - probably not much different to the price of the Jaycar one. The heatsink I used was from Jaycar. The relays are RTB34012F (Digikey PB362-ND) and RTB34024F (Digikey PB363-ND), about US$3.40 a piece. You might be able to find another replacement for these as well, but I chose them as they are rated at 12A/3000VA. Everything else is pretty bog standard and can be sourced from Jaycar.
  Reply With Quote
Old 24th April 2007, 07:17 AM   #17
Dante is offline Dante  Canada
diyAudio Member
 
Join Date: Aug 2005
Hi Smithy66,

What is the other parts I need to change for a 120 volt version ?

If I use a push button and I have a power down,
how your circuit will react ?

Thanks,

AL
  Reply With Quote
Old 24th April 2007, 09:06 AM   #18
diyAudio Member
 
Join Date: Mar 2001
Location: Sydney
Hi AL
You need to change the mains cap from 0.33uF to 0.68uF, assuming 110V/60Hz (if my calcs are correct), to drop the correct voltage, which in your case is about 80V. This must be a mains rated cap (X1/X2). I used a Vishay MKP 338 series X1 cap (Digikey BC1595-ND for the 0.33uF).

If the power is lost, the relay is no longer energised, so defaults to the off position. When the power returns it is still in the off position until you press the on switch again (ie it is not latching - the coil is energised while the amp is "on")
  Reply With Quote
Old 1st May 2007, 05:52 PM   #19
Dante is offline Dante  Canada
diyAudio Member
 
Join Date: Aug 2005
I would be interested for one unit.

Any idea when it will be available ?
  Reply With Quote
Old 18th May 2007, 04:55 AM   #20
Loboone is offline Loboone  New Zealand
diyAudio Member
 
Join Date: May 2005
Location: Hamilton Waikato NZ
Hi Smithy,

I am very interested in your boards. (230volt ac)

Do I need one per channel or will it do both channels of power amp?

Have you got pricing for boards only yet and delivery times etc?

Regards

Ian
  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
B+ soft start Gluca Tubes / Valves 2 3rd September 2007 02:04 PM
Need a soft start? maxpou Solid State 19 18th April 2007 10:23 PM
Soft start & Soft Switch circuit: can anybody help? m.parigi Solid State 95 22nd August 2005 04:32 PM


New To Site? Need Help?

All times are GMT. The time now is 05:30 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