What people are working on at the moment
jack
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by jack » Mon Mar 09, 2015 9:33 pm
pre65 wrote: nickds1 wrote: Phil's isolation transformers would make an excellent balanced supply...
That's why I did the bulk buy, I assumed that is what folks were going to use them for.
I was just being a bit thick
Experimenting with some DC blockers. ..
Vivitur ingenio, caetera mortis erunt
pre65
Amstrad Tower of Power
Posts: 21400 Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.
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by pre65 » Tue Mar 10, 2015 9:10 am
Just plugged in the prototype BMU ands nothing blew.
So at least I'd got the wiring up right. The transformer hums a little, so I tried my low power DC blocker on the front. Nothing.
Seems the IEC on the blocker has a 2A fuse built in and it's blown. I have a thermistor on the BMU as well.
I'll sort it out when I get back by nicking one of the 833a DC blockers and trying that.
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)
pre65
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by pre65 » Tue Mar 10, 2015 12:50 pm
Back home now, had a lovely walk with friends using footpaths in the Sible Hedingham area.
I replaced the DC blocker fuse with a wire link, but trying it with the BMU did not change the buzz.
So, a thin sheet of bubblewrap under the transformer was tried and it's quieter now.
I'm trying the BMU with the two GK71 amps at the moment, difficult to say if its better or not. I'll wire up the other double socket later and try it on the CD player, DAC PSU and Pre3.
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)
Dave the bass
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by Dave the bass » Tue Mar 10, 2015 12:56 pm
Mind them exposed mains terminals there Popz, no pop-bang-fizzle please!
Output Voltage OK BTW? not too high when only loaded lightly?
"The fat bourgeois and his doppelganger"
pre65
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by pre65 » Tue Mar 10, 2015 1:12 pm
Dave the bass wrote:
Output Voltage OK BTW? not too high when only loaded lightly?
At the moment it's 123.5v X 2. On test without load it was 125.0v X 2.
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)
Dave the bass
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by Dave the bass » Tue Mar 10, 2015 1:14 pm
Coolio, cheers Popz.
"The fat bourgeois and his doppelganger"
jack
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by jack » Wed Mar 11, 2015 8:16 am
Dave the bass wrote: Coolio...
If my kids caught me saying that...
Vivitur ingenio, caetera mortis erunt
Dave the bass
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by Dave the bass » Wed Mar 11, 2015 10:23 am
nickds1 wrote: Dave the bass wrote: Coolio...
If my kids caught me saying that...
For full effect go for the full phrase
"Coolio Julio" but accompany it with both hands held ahead in pointy fore-finger pose then move them in revolving circular fashion approx 180 degrees apart.
They'd be in awe!
"The fat bourgeois and his doppelganger"
simon
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by simon » Wed Mar 11, 2015 10:26 am
Just as we are Dave, just as we are...
Dave the bass
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by Dave the bass » Wed Mar 11, 2015 10:27 am
Awwww!.... Shucks!
"The fat bourgeois and his doppelganger"
pre65
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by pre65 » Wed Mar 11, 2015 10:40 am
Dave, could you be turning into an audiophool version of Del Boy ?
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)
Dave the bass
Amstrad Tower of Power
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by Dave the bass » Wed Mar 11, 2015 10:43 am
Whaadaya mean 'turning', I always have been!
"The fat bourgeois and his doppelganger"
jack
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by jack » Wed Mar 11, 2015 11:39 am
My "paintshop fu" is also weak, but couldn't resist...
Bit more time, and I'd make a better job (unlike Del-boy...)
Last edited by
jack on Wed Mar 11, 2015 11:51 am, edited 1 time in total.
Vivitur ingenio, caetera mortis erunt
Dave the bass
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by Dave the bass » Wed Mar 11, 2015 11:48 am
Very good work NdS! 9/10.
Dartford is spellededed
"Dirtfud" BTW
"The fat bourgeois and his doppelganger"
pre65
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Posts: 21400 Joined: Wed Aug 22, 2007 11:13 pm
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by pre65 » Tue Apr 07, 2015 2:04 pm
I've just ordered a bigger (in amps) thermistor for my BMU, the one on there at the moment looks fried.
Tho old one was 5A, I'm going up to 6.5A.
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)