Of course: I agree in general having heard some very very good flea power stuff. The laughing was about the use of words in "I was never a big flea power SE guy".......As I said - apologies!🙂
absolutely none needed! all in good fun.😀 Somewhere on this site, referring to Multiple way speakers, I made a comment about "wanting to try three way" you should of seen those comments!
Russellc
My music taste has changed as I have aged. I use to use 200 watts per channel with my horns but now 1 to 5 watt SET's are plenty for me or with SS one of the Firstwatt 25 watt amps. Like Nelson has said of which I agree "In my world 1 watt is a lot."
The F6 is a fantastic amp and in ways is better than an SET and in others not quite so good as a good SET. Both sound great but in different ways.
The F6 is a fantastic amp and in ways is better than an SET and in others not quite so good as a good SET. Both sound great but in different ways.
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Curious to know how music tone is with
F6 [ 25 watts ] push-pull
compare to
IXFN140N20P [ 50 watts ] single-ended ?
The same Jensen input transformer btw
Attachments
You should build F-4 and put one of those 2 watters to it! I listen to Horns, but am also starting in with OB project that is sort of medium efficiency, and I like a few other speakers that while the class A 25 First Watts drive, 2 watts wouldnt do. Just hate collapsing Sound stages when things are other than mellow. Those small SET amps need high efficiency speakers, and usually they are pretty big. My Ewaves are big, but manageable. The Altecs are just BIG. At 60, moving those monsters around is a workout. I keep them both on roller platforms.
Russellc
I know what you mean Russell, moving very heavy speakers when we are past 50 is a chore
Under my Klipsch La Scala I have 4 permanent furniture carpet sliders to each cabinet
You may have seen the sliders on TV
Works for me
FR
Under my Klipsch La Scala I have 4 permanent furniture carpet sliders to each cabinet
You may have seen the sliders on TV
Works for me
FR
6L6 has said that the F4 is his favorite amplifier but I have never seriously considered building one because I have the SE BA3 which is in reality a SE F4 instead of a push pull. When I built the BA3 I was under the impression that a SE would sound better with horns but the F6 broke that rule. It all depends on the designer more than whether it is SE or PP. I have a M2 in the works and I am looking forward to hearing what it sounds like with my LaScala's. The M2 is supposed to really shine with horns.
I try not to move my LaScala's any more than necessary but trying many different crossover combinations does require moving them. Right now I think I have the crossover I like the best so they should not have to be moved as much. Speaker ads have always touted "our small speaker sounds like a big speaker" but it is not true. All things being equal a big speaker is always going to sound better. You may have to get a divorce to get a pair though.
Yes I understand. When deciding which Altec woofers I wanted to keep really tried me. Removing the compression driver and 511 horn, removing entire box from my roller deals, tipping it forward on its face, removing the full length rear panel, changing out woofers, repeat in reverse. It was a regular weight lifting work out as they top 150 lbs if I remember correctly?
As to the "F-6 breaks the rule" sort of falls in line with my tastes, I like a little more moxie than I find SE provides. As to the divorce, yup, got two under my belt, sadly.
Russellc
I guess I am not the only one who feels this way about the complementary BA-3 amplifier.
http://www.diyaudio.com/forums/diyaudio-store/221218-chassis-discussion-8.html#post4600504
Russellc
Hello,
I've collected the pcbs, transformers and so on and now I'd like to start to build my F6 amp with R100 output devices.
I need only some informations:
Thanks a lot for your help.
Guglielmo
I've collected the pcbs, transformers and so on and now I'd like to start to build my F6 amp with R100 output devices.
I need only some informations:
- I've fooud different schematics with R100,(Buffered, Variable 2nd armonic and Output degeneration) which is the right one?
- Which kind of leds (LED1, LED2) are better to use?
- I've a 400VA power transformer and big heathsinks, wihich is the better bias current setting?
Thanks a lot for your help.
Guglielmo
1. build that one pictured as "output degeneration" (enclosed down)
2. say green , two in series per position , vulgar 5mm dia , giving you around 2x1V9 or so across , or just use Blue ones as papa (so 2V7)
3.read article on 6moons ( also attached few times here , if I remember OK) ; say that 75-80W dissipation per channel is nice area
2. say green , two in series per position , vulgar 5mm dia , giving you around 2x1V9 or so across , or just use Blue ones as papa (so 2V7)
3.read article on 6moons ( also attached few times here , if I remember OK) ; say that 75-80W dissipation per channel is nice area
Attachments
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Thanks a lot for your help.
Only two questions left:
Only two questions left:
- which is the correct value for R13 and R14?
- as indicate I can suppose that 1,5A is a good bias current?
Jim and others.
Will the F6 work OK in the Dissipante 3U 400mm case? Has anybody out there done this already? That will leave one MOSFET per sink.
BTW, received my boards this Monday. The package left US shores already in mid December. I suppose I must be happy that I actually got it and that the package did not develop feet.
Will the F6 work OK in the Dissipante 3U 400mm case? Has anybody out there done this already? That will leave one MOSFET per sink.
BTW, received my boards this Monday. The package left US shores already in mid December. I suppose I must be happy that I actually got it and that the package did not develop feet.
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Thanx ZM.
I think Babysitter will be a given around here even for 4U. Today the ambient temp is 39°C here. 5U might even struggle. Maybe sissy Class AB amp won't mind too much;-)
I think Babysitter will be a given around here even for 4U. Today the ambient temp is 39°C here. 5U might even struggle. Maybe sissy Class AB amp won't mind too much;-)
Place the Amp inside a Beer Fridge for the summer?
Hey! More than a few Computer Weenies do that
Get a cheap tabletop fan and have it blow over the amp box during extreme ambient temps ?
Or buy a Dyson fan which IS quiet for the purpose?
Although worth More than a 4U Or even a 5U case tho 🙂
Hey! More than a few Computer Weenies do that
Get a cheap tabletop fan and have it blow over the amp box during extreme ambient temps ?
Or buy a Dyson fan which IS quiet for the purpose?
Although worth More than a 4U Or even a 5U case tho 🙂
I have a plan.
Thinking of designing an amp stand with 4 built in 200mm fans. Speed controlled via an Arduino with a temp sensor.
Thankfully next week will be more cooler around here. We had the hottest Dec/Jan on record.
Thinking of designing an amp stand with 4 built in 200mm fans. Speed controlled via an Arduino with a temp sensor.
Thankfully next week will be more cooler around here. We had the hottest Dec/Jan on record.