jea48

Responses from jea48

DC Offset Blocker/Killer - where to buy in the USA
Thanks Al.Jim. 
DC Offset Blocker/Killer - where to buy in the USA
Al, (almarg)Thanks! 10 to 15 seconds..... I would have missed that for sure. What do you think about using a 22uF value for the capacitor? I chose the 22uF cap because that is what Eva (DIY member) said to use in her post. Elliott Sound Products r... 
DC Offset Blocker/Killer - where to buy in the USA
@ tomiiv30 OP and @ gdnrbob I ordered the resistor and capacitor over the internet yesterday to build the simple low-pass filter. Hopefully I will have them in about a week. 100K 1 watt resistorhttps://www.ebay.com/itm/5-pack-1-watt-5-carbon-film... 
DC Offset Blocker/Killer - where to buy in the USA
gdnrbob2,190 posts01-07-2019 1:21pm@jea48 ,Would you recommend getting a DC blocker for every system?I know not all lines have DC, but just as a precaution?Bob No, I wouldn’t. There is not any need for a blocker unless you have DC offset on the ... 
DC Offset Blocker/Killer - where to buy in the USA
https://www.diyaudio.com/forums/solid-state/2080-dc-filter-6.html#post33181522nd February 2004, 08:09 PM   #57 Eva   diyAudio Member   ... 
DC Offset Blocker/Killer - where to buy in the USA
Food for thought.Quote from an Audio Circle audio forum thread about DC offset on the AC mains. HAL Industry Contributor Posts:... 
DC Offset Blocker/Killer - where to buy in the USA
erik_squires4,643 posts01-06-2019 11:54amAgreed. If you measure that little, you need to take the amp back and prove it there. Best,E erik, keep this just between the two of us. Chuck is just plain ignorant when it comes to how to measure for DC... 
DC Offset Blocker/Killer - where to buy in the USA
tomiiv30 OP21 posts01-05-2019 12:47pmAnd this is what I get from the dealer:"Ron from McIntosh says he might hear of this buzzing issue 5 times a year. It is an amp that is 14,000 watts so it is sensitive to DC being present in the lines. He said... 
DC Offset Blocker/Killer - where to buy in the USA
tomiiv30 OP17 posts01-04-2019 9:41pmAlso I have measured for DC offset in my AC line the the result was 0.9mV, which is not enough to cause the transformer to buzz How did you measure for it? The correct way. Re: Not trying to start a flame but... 
How much are these tubes worth?
noromance1,619 posts01-04-2019 4:16pmDon’t smudge the paint on the tubes! +1@ baseben9 Don’t even attempt to wipe them off. Keep your oily fingers off the white labeling.Their value? You need to have them tested.. 
DC Offset Blocker/Killer - where to buy in the USA
tomiiv30 OP16 posts01-03-2019 12:48pm@jea48 In the manual it says "To compliment the design of the MC8207, there is a high current power supply for the five power amplifier channels". And this is a 7 channel amp so what about the other 2 channe... 
DC Offset Blocker/Killer - where to buy in the USA
erik_squires4,593 posts01-03-2019 10:42amIt is quite possible the two transformers are not the same. So differences in manufacturing can account for this. Erik, there is only one power transformer in the amp, not two. See page 15http://stereobar... 
DC Offset Blocker/Killer - where to buy in the USA
tomiiv30 OP14 posts01-03-2019 12:00am@jea48 With my amp only one is buzzing, the left one, so lets say I do have dc on my ac line why would only one buzz? IMHO I think that the one that buzz is a bad one comparing to the right one which is a ... 
DC Offset Blocker/Killer - where to buy in the USA
From the MC8207 owner manualPower Supply Circuits To compliment the design of the MC8207, there is a high current power supply for the five power amplifier channels. Refer to figure 21. The very large Power Transfomer, has toroidal windings on a t... 
DC Offset Blocker/Killer - where to buy in the USA
@ tomiiv30 As for DC on the AC mains. Nelson Pass If you are experiencing mechanical hum from your transformer, it is often caused by the presence of DC on the line. Usually this comes from some appliance using current asymmetrically, such as a l...