cant eliminate 50hz hum on just one side of the 6h6p headphoneamp

DIYspaceW · 6th July 2010, 05:53 AM

I build a DIY parafeed 6h6p headphone amp.
The problem is when I turn the power on there is a some sort of 50hz hum in one channel. I have done everything possible but the hum does not go away.
Other channel is 100% clear. I am using parafeed output transformers. Everything is grounded on one point.

Can someone help me whit this problem?

adamus · 6th July 2010, 06:22 AM

layout? one optx nearer the power tx? tried shifting the optx 90degrees?

DIYspaceW · 6th July 2010, 07:05 AM

The power supply is the same way located from this optx as other line.
I will do that. Thanks.

azazello · 6th July 2010, 08:32 AM

Pomeniaj mestami lamp....

DIYspaceW · 6th July 2010, 08:54 AM

I did changed the lamps but the same problem. I changed all the lamps.
I use for rectifire 5u4g and gass shunt regulators followed by an anode choke.
I forgot to tell about the hum, that its a little bit louder when turn on but then in
5 sec gets a little quieter, the filling is that it will go away but no. This is only on one channel.

Adamus: I installed 90degrees, no effect at all.

azazello · 6th July 2010, 11:16 AM

....sdelaj vypriamlenie nakala....i konder 10 000mkF

DIYspaceW · 6th July 2010, 11:18 AM

AZAZELLO: Please could you say in ENGLISH! I do not understand.

piero7 · 6th July 2010, 11:22 AM

Use electrolitic up to 10.000uF

DIYspaceW · 6th July 2010, 11:26 AM

Gluca · 6th July 2010, 02:47 PM

maybe the filament? might be one section more prone to pick up noise?

6th July 2010, 05:53 AM	#1
DIYspaceW diyAudio Member Join Date: May 2009	cant eliminate 50hz hum on just one side of the 6h6p headphoneamp I build a DIY parafeed 6h6p headphone amp. The problem is when I turn the power on there is a some sort of 50hz hum in one channel. I have done everything possible but the hum does not go away. Other channel is 100% clear. I am using parafeed output transformers. Everything is grounded on one point. Can someone help me whit this problem?

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
DIY build sound better than a good commercial design in a side-by-side comparison?	smellygas	Multi-Way	66	25th November 2009 08:26 PM
from 120V 50hz to 230v 50hz?	testarossa2k	Power Supplies	16	13th March 2007 01:32 PM
50Hz hum after increasing grid stopper	ray_moth	Tubes / Valves	5	18th June 2005 04:19 AM
Freeware Program To Eliminate Hum From Wav Files?	kelticwizard	Everything Else	4	3rd April 2003 03:22 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

6th July 2010, 06:22 AM	#2
adamus diyAudio Member Join Date: Apr 2008	layout? one optx nearer the power tx? tried shifting the optx 90degrees?

6th July 2010, 07:05 AM	#3
DIYspaceW diyAudio Member Join Date: May 2009	The power supply is the same way located from this optx as other line. I will do that. Thanks.

6th July 2010, 08:32 AM	#4
azazello diyAudio Member Join Date: Aug 2008 Location: Bulgaria	Pomeniaj mestami lamp....

6th July 2010, 08:54 AM	#5
DIYspaceW diyAudio Member Join Date: May 2009	I did changed the lamps but the same problem. I changed all the lamps. I use for rectifire 5u4g and gass shunt regulators followed by an anode choke. I forgot to tell about the hum, that its a little bit louder when turn on but then in 5 sec gets a little quieter, the filling is that it will go away but no. This is only on one channel. Adamus: I installed 90degrees, no effect at all.

6th July 2010, 11:16 AM	#6
azazello diyAudio Member Join Date: Aug 2008 Location: Bulgaria	....sdelaj vypriamlenie nakala....i konder 10 000mkF

6th July 2010, 11:18 AM	#7
DIYspaceW diyAudio Member Join Date: May 2009	AZAZELLO: Please could you say in ENGLISH! I do not understand.

6th July 2010, 11:22 AM	#8
piero7 diyAudio Member Join Date: Apr 2009 Location: Matera	Use electrolitic up to 10.000uF

6th July 2010, 11:26 AM	#9
DIYspaceW diyAudio Member Join Date: May 2009

6th July 2010, 02:47 PM	#10
Gluca tarmac ripper diyAudio Member Join Date: Nov 2004 Location: Back to Italy	maybe the filament? might be one section more prone to pick up noise?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)