What are you showing me Allen? the old theme? nah all good, I don't mind the nearly white background. Is there a dark mode by chance? Nope, just checked, dark mode doesn't effect the forum theme. I guess i'll check my phone later and see. Like I said, i'll get something new together.
A thank you to Allen and all the other moderators who may have participated in this forum software upgrade. As a forum owner myself I know that things can go sideways pretty quick during a software upgrade, I say well done on this one!
Cheers!
Howie
Cheers!
Howie
Yeah, from me too. I can imagine it is a huge job, well done. Now getting used to, oh boy, this is very different.
Conversion efficiency, I will remember that. Yes, a paradox it seems. That 1000mW and 62.5mW just doesn't look right, but when understood, it does. I think that is what Jan can't get his head around? Only he could say and I will not be guilty of putting words in his mouth.
If I may just put a cap on that. The real value in conversion efficiency is from 1000mW (one driver) down to 250mW (four drivers) which only then becomes 62.5mW - or else it would come across as too fantastical. The conversion efficiency is between 1000mW and 250mW and no more. It is just that the 250mW is shared (divided) by four drivers to 62.5mW, but it still remains 250mW dissipated in the voice coils.
Every time I turn around there is something new to get used to. It was more fun when I was 20. Not so much at 70.Yeah, from me too. I can imagine it is a huge job, well done. Now getting used to, oh boy, this is very different.

In some cases change worth the effort and necessary but revising basics like Word and Excel because you are 25 and tired of its look is painful and must cost corporations $$$$ in training and support.
Every time I turn around there is something new to get used to. It was more fun when I was 20. Not so much at 70.
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I just turned 70 on December 3rd. Know what you mean.
I have that too, but found that often it isn't new at all. I just forgot how it was 😎 We septuagenarians have to stick together!Every time I turn around there is something new to get used to.
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Taking bets that I'm the oldest 70 year old here. Eight days from leaving you losers behind.
My goal is to live to Geronimo's 200th birthday, 2029 June 16. Could happen. Or not, but it's a useful target.
All good fortune,
Chris
My goal is to live to Geronimo's 200th birthday, 2029 June 16. Could happen. Or not, but it's a useful target.
All good fortune,
Chris
You got change for March 1947 ? ;-)Taking bets that I'm the oldest 70 year old here. Eight days from leaving you losers behind.
My goal is to live to Geronimo's 200th birthday, 2029 June 16. Could happen. Or not, but it's a useful target.
All good fortune,
Chris
I feel your pain, a Synology NAS update resulted in no PC pre-Win10 being able to access network data without a patch....although the biggest pain I have right now (off-topic pending, run for your lives!) is refurbishing a 50 year old Drake R-4B HF receiver with a Linear PTO (Permeability Tuned Oscillator) which will randomly pop back and forth several hundred cycles (while tuned to 5 MHz) with concurrent internal B+ rail changes. No parasitic oscillations are showing up on the output. After replacing the Zener I am suspecting leaky ceramic bypass capacitors. It sounds like a no-brainer simple fix, right?...until you see what physically accessing the PTO PCB entails...Every time I turn around there is something new to get used to. It was more fun when I was 20. Not so much at 70.
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And for your daily amusement I have attached a scan of the PTO schematic which was shoe-horned into a small corner of the schematic page...I had to redraw it to be sure of what I was working with...
I now return you to your audio subject du jour...
Cheers & 73,
Howie / WA4PSC
Attachments
I feel your pain, a Synology NAS update resulted in no PC pre-Win10 being able to access network data without a patch...
Went through the same pain myself, your best bet is to enable NFS 1.0 on the NAS. Not really secure, but works fine for home use.
A more AF-oriented post to compensate for the RF post...
https://phys.org/news/2021-12-physicists-special-transverse.html
I have seldom read a paper containing so many buzz words, I looked for an April 1 posting date, but I see some serious problems with their postulate. To begin with there is indeed shear as defined by classical physics in both gases and liquids. It is the basis for injection molding, hydrodynamic bearings using both liquid and gas, and refraction of wavefronts.
Maybe someone a lot smarter than I am could see their point, perhaps seeing through potential translation (pun intended) errors?
Cheers!
Howie
https://phys.org/news/2021-12-physicists-special-transverse.html
I have seldom read a paper containing so many buzz words, I looked for an April 1 posting date, but I see some serious problems with their postulate. To begin with there is indeed shear as defined by classical physics in both gases and liquids. It is the basis for injection molding, hydrodynamic bearings using both liquid and gas, and refraction of wavefronts.
Maybe someone a lot smarter than I am could see their point, perhaps seeing through potential translation (pun intended) errors?
Cheers!
Howie
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Hi Ed!Howie,
I would suspect C201 and the power resistor feeding it.
ES
I already checked the 6k 5W ww resistor while the problem was occurring and the V drop in both cases is correct for 6k, so yep, that 10 nF and it's ilk are scheduled for the chopping block.
Cheers!
Howie
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