Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Bugle power supply
Bugle power supply
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
Thread Tools Search this Thread
Old 17th April 2018, 02:43 PM   #21
binspaul is offline binspaul  India
diyAudio Member
binspaul's Avatar
Join Date: Feb 2009
Location: Cochin, Kerala, India
Bugle power supply
Originally Posted by JMFahey View Post
Dear binspaul, you are incredibly inconsistent in the data you supply, itīs IMPOSSIBLE to answer if you keep changing things all the time.

1) up to post#12, we were talking a +/-15V supply, fed from a 18+18V transformer (originally), switched to 15+15V in post #12 .
Then without explanation you switch from +/-15V rails to +/-24V
That alone invalidates all earlier calculations and answers

Even worse: by rising regulator voltage (24V) and lowering transformer voltage (15VAC means meager 21V peak/raw rail voltage) makes their work IMPOSSIBLE.
Do you realize that?

Hey, earlier you said it was
PLEASE decide on one value and stick to it.

Then you have a shorted preamp.

If the amplifier shorts and burns the Power Supply then you DO have an issue with the Amplifier.

I am extremely sorry for the confusion created. The thread was started to discuss the Hagerman Bugle Power Supply for using in a phono pre amplifier project. After the few posts and discussions, the transformer required was confirmed to 15-0-15 center tapped.

Instead of creating a new thread, I used the same thread to discuss on using the Bugle power supply board to power the Pass B1 Buffer preamplifier. As I am having extra Bugle power supply boards and components, I was planning to use the same to power the B1 project (if possible).

1. Since B1 requires a higher input voltage, I switched the transformer to 18-0-18.
2. The resistor value is 10R @ 500mW (sorry for the typing mistake)
3. I am also assuming that there seems a shorting in the amplifier board which I need to find out.
4. Will there be a short if I reverse the JFET's?
5. I am using the original B1 buffer preamplifier and is only using the POSITIVE and GND from the bugle power supply. The NEGATIVE section is unused.

Best regards,
  Reply With Quote
Old 23rd April 2018, 09:54 AM   #22
binspaul is offline binspaul  India
diyAudio Member
binspaul's Avatar
Join Date: Feb 2009
Location: Cochin, Kerala, India
Bugle power supply

I was finally able to find the cause for the 10R getting blown out. It was due to an active short in the preamplifier board and the board was drawing too much of current when powered on. The 10R was not able to handle the demand and was getting blown out.

Best regards,
  Reply With Quote


Bugle power supplyHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Hagerman Bugle Phono preamp & Power Supply $170 bigaudioscotto Swap Meet 4 31st January 2015 09:29 PM
FS: Hagerman Bugle w/Power Supply craigtone Swap Meet 0 1st December 2012 11:36 PM
FS: 15v regulated power supply (Hagerman Bugle) madisonears Swap Meet 2 12th March 2012 03:54 AM
Hagerman Bugle power-supply or for +/-15dc 100ma generic supply. tweakk Swap Meet 3 23rd February 2011 06:46 PM
New hagerman bugle+power-supply boards... tweakk Swap Meet 0 29th July 2010 04:43 PM

New To Site? Need Help?

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

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio