PASS 50W single ended mosfet amp.
- Cressy Snr
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#361 Re: PASS 50W single ended mosfet amp.
These buggers ought to drive your Quads beautifully.
Sgt. Baker started talkin’ with a Bullhorn in his hand.
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#362 Re: PASS 50W single ended mosfet amp.
Hopefully.
Although when I took them to Owston in 2017 (with the baffles) no one seemed at all interested in them.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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#363 Re: PASS 50W single ended mosfet amp.
Whaddya expect?... They're TRANSISTORS! (horrors)
Solid state is fine though. My NVA clone is going to Owston and Ed has some interesting SS gear to show, I think. Then there is the terrifyingly expensive Soulution thingy, so you never know ....
Solid state is fine though. My NVA clone is going to Owston and Ed has some interesting SS gear to show, I think. Then there is the terrifyingly expensive Soulution thingy, so you never know ....
Sgt. Baker started talkin’ with a Bullhorn in his hand.
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#364 Re: PASS 50W single ended mosfet amp.
Oh the heat !!!!
Anyway, finally got both A & B tested, and now set up in the system with the ESL57s.
I'll need a few hours to get a firm opinion, but first impressions are good.
PS For Eds edification, can't hear the two cooling fans.
Anyway, finally got both A & B tested, and now set up in the system with the ESL57s.
I'll need a few hours to get a firm opinion, but first impressions are good.
PS For Eds edification, can't hear the two cooling fans.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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#365 Re: PASS 50W single ended mosfet amp.
Well, after a few hours testing I'm happy that these single ended mosfet amps work well with the ESL57s.
They seem to go louder than the GK-71 amps, no surprise really, but a "bigger" sound as well.
Sitting here, with a glass (or two) of chilled crab apple wine, listening to the Lark Ascending.
Sublime.
They seem to go louder than the GK-71 amps, no surprise really, but a "bigger" sound as well.
Sitting here, with a glass (or two) of chilled crab apple wine, listening to the Lark Ascending.
Sublime.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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#366 Re: PASS 50W single ended mosfet amp.
I've finally managed to get the amps on my rack.
The amp parts are on the bottom shelf, pulled out frontwards so the heatsinks are not covered by the shelf above, and the overhanging front held in place from the floor by supports made from bits of scrap BBP.
Just got to make up slightly longer connecting wires and plumb in the 12v supply for the (silent) cooling fans.
The amp parts are on the bottom shelf, pulled out frontwards so the heatsinks are not covered by the shelf above, and the overhanging front held in place from the floor by supports made from bits of scrap BBP.
Just got to make up slightly longer connecting wires and plumb in the 12v supply for the (silent) cooling fans.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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#367 Re: PASS 50W single ended mosfet amp.
Two steps forward, one step back.
Got everything in position and wired up now. Great sound.
Trouble is now, got a slight hum on both speakers.
I'm sure it's because of the way the amps are now positioned, the curse of racks.
More thought required.
Got everything in position and wired up now. Great sound.
Trouble is now, got a slight hum on both speakers.
I'm sure it's because of the way the amps are now positioned, the curse of racks.
More thought required.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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#368 Re: PASS 50W single ended mosfet amp.
I've had one of the amp portions on the workbench, have moved the input transformer about three inches further away from the power supply, and tidied up the wiring a tad.
I'ts now on test and no hum is noticeable.
Must do the second one now.
I'ts now on test and no hum is noticeable.
Must do the second one now.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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#369 Re: PASS 50W single ended mosfet amp.
Second one done.
However, there is still a little hum, slightly more on B than A.
However, there is still a little hum, slightly more on B than A.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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#370 Re: PASS 50W single ended mosfet amp.
On the output of these amps is a 10,000uf cap bypassed with a 10uf cap.
Would these be considered as "floating" ?
This question was asked because of a Nick G post on HFS.
Circuit diagram is on page 24, 3rd post down.
Would these be considered as "floating" ?
This question was asked because of a Nick G post on HFS.
Circuit diagram is on page 24, 3rd post down.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
#371 Re: PASS 50W single ended mosfet amp.
Sort of, yes, but the signal level at that point will be large, so its unlikley that its the cap picking up a hum field. Also the output side of the cap is connected to ground via the 8 ohm of the speaker.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
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#372 Re: PASS 50W single ended mosfet amp.
I need to make it easier to couple the two parts of each monoblock together to
A) Minimise floor space.
B) Eliminate transformer field caused hum.
Then they would be easier to set up and use. I'd like to bring them to the next Owston.
A) Minimise floor space.
B) Eliminate transformer field caused hum.
Then they would be easier to set up and use. I'd like to bring them to the next Owston.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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#373 Re: PASS 50W single ended mosfet amp.
I've finally made a start to make each monoblock take up a single floor space.
Double deck is the idea, I sort of know how they might end up.
Double deck is the idea, I sort of know how they might end up.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
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#374 Re: PASS 50W single ended mosfet amp.
watching.
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
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#375 Re: PASS 50W single ended mosfet amp.
You could consider the 'Boost' - slightly rippled, with a flat underside.
"Once you find out ... the Circumstances ; then you can go out"