Krell KSA 50 pcb - Page 502 - 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 4th December 2005, 12:57 PM   #5011
troystg is offline troystg  United States
diyAudio Member
 
troystg's Avatar
 
Join Date: Apr 2004
Location: In a dream... Please don't wake me.
Quote:
Originally posted by GeWa
Troy

Epcos has a type with a 10mm pitch.
They are available at Digi-Key.

Regards

That will work for Al's boards.. Thanks. Any suggestions for Jan's? His has a 7.5mm pitch and these leads are too short to cheat by bending in..

Mouser carrys the AVX brand spec'd by Jan, but I have not been successful in finding that value in hole through.

Edit: Srcatch that, the one directly above your highlighted line is 7.5 mm pitch...
__________________
Troy
Thinking positive doesn't make things better, it makes you a better person.
  Reply With Quote
Old 4th December 2005, 01:19 PM   #5012
VT67 is offline VT67  Belgium
diyAudio Member
 
VT67's Avatar
 
Join Date: Jun 2004
Location: Belgium
Quote:
Srcatch that, the one directly above your highlighted line is 7.5 mm pitch...
Yep. It's the same Digi-Key page I used in post #4884 when somebody needed MKP's with a 7.5mm pitch.

Cheers
  Reply With Quote
Old 4th December 2005, 05:11 PM   #5013
kmj is offline kmj  Sweden
diyAudio Member
 
kmj's Avatar
 
Join Date: Feb 2004
Location: Falkenberg
Sorry for posting the same queston again but i'm sitting on a modem and it would that a REALLY long time to find the answer/tests....so sorry

But 2x30V for a trannie was the latest recommendation, right? I found one at 1KVA and 2x30VAC but since i'm buying it for a friend and not for myself I would feel better If I was sure.
  Reply With Quote
Old 4th December 2005, 05:24 PM   #5014
diyAudio Member
 
still4given's Avatar
 
Join Date: Oct 2004
Location: Victorville, CA
I used a 30-0-30 500VA for my first KSA50 and it works great. I just finished putting together one with two 28-0-28 400VA transformers and I can't hear any improvement. I think the 30-0-30 will be fine.

Blessings, Terry
__________________
X-BoSoZ, B1 Mezmerize, P101, Symasym, KSA 50, Aleph-X, Leach Low TIM, Leach Superamp, Dx MKIII, Super A, Honey Badger, JLH 1969, Gainclone. FetZilla, Peeceebee, VSSA PMI & jkuetemann, SKA GB150, Ovation nx & sx, AX&SX-14, TMG8, Slewmanster w/CFA-XH, Wolverine, Spooky, Symasui, Low TIM hybrid
  Reply With Quote
Old 4th December 2005, 05:28 PM   #5015
kmj is offline kmj  Sweden
diyAudio Member
 
kmj's Avatar
 
Join Date: Feb 2004
Location: Falkenberg
Thanks Terry.
Btw, I like your signature.
  Reply With Quote
Old 4th December 2005, 08:12 PM   #5016
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Quote:
Originally posted by K-amps
HAHA!

I got it!


Woohoo!

Thanks Al for nudging it
Quote:
You know that 60 second posting limit seemed like an eternity to me! It was like chasing the last seconds of an auction, Zap, Zap Zap.

Well done K-Amps......Well done....

.... kind of cheating, putting up 4999 to set yourself up for the score, and not even posting on topic. Yet I can't be mad as I would have missed it anyway, that flurry of posts took place at a most inopportune moment.

We shall see if you have the legs to compete for 6000 cause I aint leaving anytime soon.


Hey, here is a question---

I'm using a 3-in-1 AC inlet/switch, you know the kind with the on/off switch built into the ac inlet so its all 1-piece. Now, sometimes when I turn the amp on, I hear a click come from the AC inlet and the power immediately turns off. This happens right away when you turn the amp on. My guess is that the AC cord is coming loose from the AC inlet, or the 3-in-1 is malfuntioning. I can't find anything wrong with the connections inside the amp. This all happens before the soft start has time to bypass the thermisters, it all happens immediately on flipping the on/off switch. Sometimes I get the same noise when I turn the amp off because my big thumb is blocked by the AC cord and its tough to make a decisive off-switch motion, so its off for a split second and then on again but no juice is coming into the amp.

I just turn it off adjust the power cord from the wall to inlet, and then turn it on again and it works, or if not, readjust and keep trying till it works. Weird. Anyone have this problem before or know what it is? Thinking a bridge could have been blown, I checked the DC rails with a scope, everything looks good and is at the proper voltage.

I have tried 2 power cords and it happens with both. A standard IEC cord, and a really massive PS Audio Lab cable that is so humungus that if you saw it you might suspect this type of problem.

Note- my soft start uses 3 ohm thermisters but shunts them using a 15A/220 V relay and 14 gauge wire 5 seconds after turn-on.
  Reply With Quote
Old 4th December 2005, 08:52 PM   #5017
K-amps is offline K-amps  United States
diyAudio Member
 
K-amps's Avatar
 
Join Date: Nov 2003
Location: Indiana
Actually when I posted and was on the compose screen, it was 4998, however when I posted, I saw Andrew's post, thereby he nudging mine to 4999.

I had to post another ;-)
  Reply With Quote
Old 4th December 2005, 09:21 PM   #5018
diyAudio Member
 
Join Date: Mar 2004
Location: Texas
Are any boards still available?
  Reply With Quote
Old 4th December 2005, 10:51 PM   #5019
diyAudio Member
 
still4given's Avatar
 
Join Date: Oct 2004
Location: Victorville, CA
Hi Guys,

The last thing I need to do on the second KSA is get the pilot light to work. This switch has a 3V diode built in. What size resistor do I need to make it work? I can come off of the PSU which is putting out right at 40VDC, or the mains at 121VAC. Any place else you can suggest? How should I hook it up?

Thanks, Terry
__________________
X-BoSoZ, B1 Mezmerize, P101, Symasym, KSA 50, Aleph-X, Leach Low TIM, Leach Superamp, Dx MKIII, Super A, Honey Badger, JLH 1969, Gainclone. FetZilla, Peeceebee, VSSA PMI & jkuetemann, SKA GB150, Ovation nx & sx, AX&SX-14, TMG8, Slewmanster w/CFA-XH, Wolverine, Spooky, Symasui, Low TIM hybrid
  Reply With Quote
Old 4th December 2005, 11:56 PM   #5020
lgreen is offline lgreen  United States
diyAudio Member
 
lgreen's Avatar
 
Join Date: May 2003
Location: San Diego, USA
Terry, tell us the color!

See below. About .7 to .8 watts dissipated in the resistor.

Ive calculated this for 20mA in the LED, but they work fine with 10mA so anything from 2K-4K should be fine, 4K will be about 1/2 watt. Use a 1 or 3 watter if you have one.


________________Amber_____Blue
____________DATA SHEET___DATA SHEET
E (supply V)_______40.0_____40.0
Vf (volts)__________2.0______3.5
If (mA)___________20.0_____20.0
R (ohms)________ 1900_____1825

EDIT- I see you mentioned a 3V diode, that makes it 1.85K for 20mA, same advice, come off the V+ supply, LEDs don't like reverse voltages (from AC).

I had found an awesome link for LEDs, but lost it when my computer was stolen, here is a link that is almost as good: led link
  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



New To Site? Need Help?

All times are GMT. The time now is 12:34 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