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In Reply to: RE: 91A derivative - question to Paul Joppa posted by xcortes on January 07, 2015 at 04:55:41
about using grid chokes.... then it gets hijacked into theoretical PS opinions.... first of all, this design originated back in 1993 by Joe Roberts and Paul Joppa was kind enough to rework it into a parafeed design.... could the amp be improved ?.... what amp can't ?....
these discussions constantly seem to end up revolving around a serious amp design that is so full of the latest and greatest stuff, but no schematic, test results or updated pictures are ever provided.... so far only one person has popped up with one of those amps and he got dissed as the design techniques have improved so much lately he has an out dated amp.... LOL.... its past time to say put up or stfu....
plus there is constant criticism about what people actually hear with other amps that do not follow these "modern" design rules.... music is "too slow" or "out of time" or other nonsense....
no doubt the amp is a huge piece of the sound puzzle.... my source is a Core Mac Mini to a Schiit Gungnir to speaker system with Onken 360L GPA 515-8LF bass, Oris 200 with AER MD3 mid and Fostex 900T highs.... not to mention all the cables and the XO construction that's there.... until you can match that don't even attempt to tell me what I hear....
please don't get me wrong.... I could care less what the "opinions" are of what I build, listen to or am perceived to hear.... my thought is some people could improve what that hear just by getting the wax out of their ear canals.... so what... the point is until we start to see the entire picture of whats being compared to what in reality then its all subjective.... and that's pretty much all it will ever be as there are too many different parameters that each of us have....
this is a great forum.... I learn a lot and am grateful to people for sharing their knowledge.... but the "my way is the only right way" is counter-productive....
Follow Ups:
nt
To infinity and beyond!!!
I am (frequently, on the Asylum!) reminded of this joke:
How many ballerinas does it take to change a light bulb?
--- Five - one to change the bulb, and four more to stand around saying "Pffft... I could have done that way better."
Hi Paul FWIW I haven't been commenting with regards your implementation of the Western Electric PSU, I think most of us understand the limitations of the design as you pointed out.I'm not sure if I am one of your Ballerinas or not, but I learned a bit with this De-railed thread.
Cheers
Edits: 01/13/15
I agree in general principle.In this case, the off-topic posts/threads started with when you posted a response that was a parts list prefaced with "if there's any interest my parts are below...". Unintentionally, your post opened the door for off-tpoic responses without addressing xcortes' question. When I read Jeff's response to your post I considered calling-out Jeff on his off-topic, but I realised that it could be stretched that he was on topic in relation to your post.
With that said, I believe I did not help by asking questions in relation to power supplies and their modeling; my bad and I will try to always keep the *original* poster's question and intention in mind, rather than continuing subsequent off-topic posts. I agree that far too many threads evolve into debates about PS topologies and build methods that are at best extremely remotely related to the original post. It would make for a more productive forum if the instigators could stop (start a new topic!) and moderators make some attempt to keep discussions on topic.
I think we need to alert moderators to off-topic posts. If enough of us can do that, perhaps we could start to see more constructive discussions.
Regards,
91
Edits: 01/10/15
"In this case, the off-topic posts/threads started with when you posted a response that was a parts list prefaced with "if there's any interest my parts are below...". Unintentionally, your post opened the door for off-tpoic responses without addressing xcortes' question. When I read Jeff's response to your post I considered calling-out Jeff on his off-topic, but I realised that it could be stretched that he was on topic in relation to your post."Ironically, however, Jeff then accused me of hijacking HIS thread!
Chris
Edits: 01/11/15 01/11/15
.
you're right to a certain extent.... I did post a parts list although my PS cap are 22uF not the 15uF use in the sims (not that the results would change that much)....
but more important, my thought is people are sincere in their efforts to share knowledge.... a lot of people have forgotten more stuff about electronics then I know.... Jeff M is a good example.... always willing to jump in and offer some thoughts.... however there is a difference between teaching, coaching, correcting AND feeling like you are having something shoved up your arse.... perhaps remembering what it was like to be mentored would give some perspective on how things sometimes come across when trying to mentor.... anyway Jeff, thank you for your suggestions.... now Dennis is another story.... ha.... dude, until you open up your kimono with a schematic, pictures, test results etc you are on thin ice.... remember your post about mounting capacitors and not to cut their leads but winding them like shock absorbers ?.... classic.... like making little RF antennas....
inevitably we migrate towards people who we feel offer knowledge and advice we relate to or are comfortable with.... its all good... in the end we build designs that interest us and live with the result.... or tear it apart and redo as we see an approach that could be an improvement.... so again sorry to all and thanks to all for the wealth of information shared.... best -Al
Though I don't mind Dennis' postings, for the most part.
Regards,
91
That would clean up a lot of the crap. People interested in pursuing "modern power supply design" will know where to find the pertinent info. BTW, AER drivers are nice. I looked at Lamhorns a long time ago that used those drivers. Reps are also nice drivers.
Maybe they could go there.
I have no idea why Dennis and Jeff are so opposed to this concept. I believe they must like the bickering. It seems like they would do more to advance their "research" in a dedicated sub forum. Call me crazy.
Hard to thing of any topic that will not eventually evolve into a low resistance PS discussion, or so it seems.
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