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In Reply to: RE: Anything to be gained or loss by two chokes in series vs. one in PS? posted by Paully on May 14, 2012 at 14:42:46
You going to need to drill (2) extra holes in your chassis and the two choke are probably going to be taking up more space.The orientation of the chokes will also be a concern because of the interaction of the magnetic fields.
Are you breadboarding your circuit before the final build?
If so, you can sort of move parts around if AC hum becomes an issue.
Edits: 05/15/12Follow Ups:
Just wanted to say thanks to the people who have offered input here and below.
I am not planning on bread boarding, I only wish I had that kind of patience. I am thinking that an extra bit of money so that I don't have to worry about choke interaction and also have the lower resistance sounds good. My biggest concern now is the suggestion that I don't have enough Mu in the 76's to run a two stage amp and power the 45s properly. I will probably go ahead and build it with the 76s, but a switch to a tube with higher Mu is a distinct possibility down the road.
dt,
if you read some of the old wranlger posts you'll note he never "bread boarded" an amp. ;)
Rage,
Yes, I am well aware that the concept of using breadboards is not something endorsed by our mentors, tube wrangler or drlowmu.
As I recall, Paully was being helped by his EE friend and seems to be constructing a "traditional/conventional" SE circuit.
I did not know if he was doing a final build up or experimenting with a breadboard or whatever.
IME, a breadboard can be helpful if you like to change things up a lot.
dt 667
Mentors? You speak for yourself!
Ray,
I was responding to a comment posted by Rage, who happens to be a builder of "modern" SE tube amps.
Since he built a Medwin SE DC 2A3 amp, I could logically assume that Tube Wrangler and Drlowmu are two of his mentors.
And I am sure that Rage would be proud to cite them as an influence.
Have a nice day,
dt 667
The #1 influence. Great guys. Jeff helped me build one hell of a 2a3 amp for not a whole lot of money! It's the best amplifier I've built, no contest with anything else I've played around with.
He has been patient with my lack of knowledge and experience and always willing to help. Both guys are stand up good people.
There are other guys that have helped along the way... Kegger from AK has been a big help to me, SET12 from over there too... Douglas around here is probably getting tired of all of my inquires, but yet another great guy and great source of knowledge.
There are other guys around here on the more technical engineering side of things I consider to be a great resource too. They might not agree with Jeff/Dennis however I always try to carefully read what they put out there and consider it.
These guys might not all agree with each other however all of them have been indispensable to me. Lots of others around here like that too, I learn a lot on this site... and a good deal of it is from people that don't much care for subjective evaluations and marketing. ;)
I don't see either of these gentleman as a mentor in the full sense of the word.
I perceive Jeff as passionate, dedicated and very thorough but too lacking in technical knowledge and understanding to be a mentor. Jeff is generous, however, in sharing what knowledge he does possess in his desire to help others. I can well believe you have benefitted from his help.
Dennis, on the other hand, is boastful, invents his own arcane terminology as he goes along (e.g.transfer efficiency), talks in riddles and guards whatever knowledge he may have as if it were a state secret. I don't see that as particularly helpful and certainly not in any way acting as a mentor.
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