|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
63.246.183.22
In Reply to: RE: Proof again - you can't believe what you read on the 'Net posted by Michael Samra on May 08, 2016 at 15:10:44
Mikey, they have no other purpose. 2uH at 20kHz looks like 0.25 ohm. At 50 Hz, it's 0.0006 ohm. These chokes aren't intended to have any effect whatsoever at audio frequencies. I'm highly skeptical whether your transformer winder knows any areas of electronics outside his field of expertise.
--------------------------
Buy Chinese. Bury freedom.
Edits: 05/08/16Follow Ups:
That was my guess it was wrong because when you remove the choke and put a jumper in,it oscillates even at idle with no signal.The guy doesn't appear to be stupid but we may misinterpreting what he is saying.There may be some balancing affect because why the inductors different values on the two tubes?
A friend you get for nothing,an enemy has to be bought
Edits: 05/08/16
"There may be some balancing affect because why the inductors different values on the two tubes?"
It's likely the design team had a criteria for stability that covered a certain range of variables. The variable(s) might have been plate voltage, grid voltage, or something else. Whatever it was, they probably would have varied those parameter(s) over whatever window they deemed necessary while hunting for spurious responses. The two different values might simply have been chosen empirically as those that produced the most stable amplifier. In fact, the need for different values might be the result of a slight imbalance in transformer winding C, but that doesn't mean such an imbalance can be corrected in this way. Clearly, the chokes are only what was required to make the amplifier stable. One thing interesting - I was reviewing the values of the chokes this afternoon online, and it appears Mac made them the same in later products.
--------------------------
Buy Chinese. Bury freedom.
I got one from rat shack out of the multipacks they had for like 3.00 and it worked..I broke it pulling it out putting in a new socket but it was a much better quality choke than was in it from the factory as far as build..Not that you can tell much from a tiny plate choke..
A friend you get for nothing,an enemy has to be bought
Edits: 05/08/16
About cerrem
Biography
Analog IC Chip designer, Power supply and magnetics engineering, Defense contractor
Location
San Diego, CA
Interests
SCUBA, Skydiving, Paramedic, M-14 rifles, chics, single malt scotch, TUBES
Occupation
Electrical Engineer Aerospace
Country
United States
A friend you get for nothing,an enemy has to be bought
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: