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Post by Mr Whippy on Jul 13, 2015 17:32:51 GMT
Found this seller looking for IDC cable. Has some cheap items, including fans.
291499721693.
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Post by Deleted on Jul 20, 2015 21:06:36 GMT
Oh yes the improved mods use the same PCB but with a few bit cost lots more I am sorry to say but well worth it. I have one now with the upgraded bits, Sam is standard and Paul I suspect will do what I have done.
The FET has gone to a monster and the Darlington has been replaced with a FET, the same one as the drive, it 1.5mR RdsON and only 350A but the SOA is much nicer tons of room for higher current IQ.
The FET driver stage IQ has also gone up but now the BD139/140 have to be fitted with heats sinks.
It sung beautifully before but now it is shear angel music, with the harp top and the bass of a cannon.
The BOM will reflect the upgrade but you may need a mortgage. Sorry lads.
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Post by Deleted on Jul 21, 2015 20:21:10 GMT
 SECA Kit can be improved to provide deeper BASS and more power only few more watts, Will lose the 2V saturation on the original darlington constant current to a few millivolts. The heatsinks now under dynamic power out will run cooler so we can push the current up so those nasty 4R speakers will behave, The PCB stay the same so place your orders now, new stock in. |
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Post by Deleted on Jul 26, 2015 18:15:52 GMT
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Post by Deleted on Aug 7, 2015 12:45:10 GMT
I am about to start sell the PCB made up with the super fet version 2 with all PCB components and the ceramic washers, so all you will need is a transformer, chassis, and a pair of large heat sink.
Each Amp PCB will be about £100.00 each +P&P
No soldering for You at all to the PCB
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Post by Sovereign on Aug 7, 2015 13:30:04 GMT
That could be a good development
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Post by John on Aug 7, 2015 15:24:18 GMT
That sounds ideal as soon as I have the money which will after Christmas I contact you
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Post by Eduardo Wobblechops on Aug 8, 2015 10:30:46 GMT
Colin,
It's my wedding day today, so a bit busy :-) but I'll take a pair please. I take it this doesn't include the power supply pcb's?
Send me a PM and I'll get back to you when I get time.
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Post by ChrisB on Aug 8, 2015 10:46:11 GMT
Ali, you're a proper hifi trooper -Ordering amp kits on yer wedding day, indeed!
All the best mate.
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Post by Sovereign on Aug 8, 2015 12:13:08 GMT
Bloody hell Ali, hard core to the end, I like your style!
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Post by John on Aug 8, 2015 12:15:58 GMT
Unfortunately funds are low till after Christmas
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Post by Sovereign on Aug 8, 2015 14:41:05 GMT
Colin don't go selling all the boards and leave me high and dry now ;-) can't remember how many boards I need for my next two amps.
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Post by John on Aug 8, 2015 15:01:57 GMT
How many amps are you going to have
Are you going active
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Post by pre65 on Aug 10, 2015 8:44:10 GMT
One thing that is causing me worry about the DIY SECA amp of Collins is the power supply.
The on board one seems a little basic, and the dynamic PCB a bit complicated.
As I like to DIY as much as possible I thought I might try a capacitance multiplying PSU as in fig 3 of this article.
sound.westhost.com/project15.htm
Any thoughts or suggestions ?
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Post by Sovereign on Aug 10, 2015 11:11:31 GMT
How many amps are you going to have Are you going active Hi John I have made a dramatic move, and I hope it's forwards and not sideways, I made a very spontaneous purchase, I managed to get these for a deal, but I do have to travel a fair way. www.hifiwigwam.com/showthread.php?120569-Linkwitz-Orions&highlight=IrbThey are extremely well thought of. I will need three power amps. So I will need to build another two of Colin's DIY amps |
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Post by John on Aug 10, 2015 14:02:59 GMT
Interesting choice I only heard this www.linkwitzlab.com/LX521/Description.htm which is very good indeed They need 5 amps! I no idea if they be move forwards or sideways. You find out soon enough. How will you be controlling the crossover I presume something like the MINI DSP but loads of other interesting ways you could do this I will have to come around some weekend when you have everything plumbed in |
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Post by Sovereign on Aug 10, 2015 15:16:22 GMT
There is a lot to read and a lot to learn but as I understand it they are controlled by there own passive xover which allows you some degree of control / alteration but not as much as a dsp
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Post by Eduardo Wobblechops on Aug 11, 2015 8:47:33 GMT
It's an active crossover, if it was passive you'd only need one amp.. :-)
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Post by Sovereign on Aug 11, 2015 10:22:26 GMT
It's an active crossover, if it was passive you'd only need one amp.. :-) Yes your right mate, If I was sober I would have said it's an analogue xover not s digital xover. Its a crazy move as all is sounding incredible as it is a Sov Towers. I do have these mental moments, and this one must be the loopiest of all of them |
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Post by Sovereign on Aug 11, 2015 10:37:21 GMT
One thing that is causing me worry about the DIY SECA amp of Collins is the power supply.
The on board one seems a little basic, and the dynamic PCB a bit complicated.
As I like to DIY as much as possible I thought I might try a capacitance multiplying PSU as in fig 3 of this article.
sound.westhost.com/project15.htm
Any thoughts or suggestions ? I have no idea, Colin would need to comment hear really |
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