Yet another 3886 gain clone! - Page 6

Puffin · 22nd November 2007, 04:08 PM

ianpengelly. I have just built one of the Chipamp kits. Running on one PS at the moment (but I built two for pure dual mono) I have ordered another tranny, but are intrigued as to how you ran both boards off what appears to be a dual secondary tranny. Did you just daisy-chain the secondary's from one board to the other?

ianpengelly · 8th December 2007, 09:57 PM

Hi Puffin,

I just split each of the secondaries to wire up two PS boards, but like I said in my commentary it wasn't ideal because of the hum.

Andrew,

Nice work, a video would have been interesting to show what happened... I am slightly concerned that your fuse holder took off across the room! :-)

ianpengelly · 8th December 2007, 10:00 PM

I got round to replacing the front on my chipamp and my preamp, as they didn't really fit in with the rest of my gear with the silver fronts and also I had used pencil to indicate what the knobs were for on my pre-amp... classy eh?

Anyway, I decided to borrow an idea I had seen used for some speaker lables by someone on this site and use two sheets of perspex with a printed lable sandwiched between them to give the results I was after and here they are!

ianpengelly · 8th December 2007, 10:03 PM

And with slightly less reflection!

Puffin · 9th December 2007, 09:01 AM

Can we see some pics of the inside of your pre-amp and how you propose to go active with it ?

As you may remember I built a dual mono BrianGT amp. I have since made a P2P 3886 using Nuuk's excellent site (and his help on here !). Even made my own snubberised PS. Trouble now is I have two great sounding amps ( I used to have Audiolab per/power), but the one I slaved over for hours is the one that is running now !

I am using a valve pre, which semms to suit it very well. It has a lot of gain.

ianpengelly · 9th December 2007, 11:31 AM

I'll try and get some photos next time i have it open to wire up the later three inputs, as only the CD, Tuner and TV are wired in a the moment.

I am planning on building a buffer based around the OPA627 to make it active, with a regulated PS. There are a few designs out but this is the one I am most likely to follow:

http://www.platenspeler.com/diy/prea...chooser_3.html

If you have two amps, why not bi-amp? Or go surround sound, or use one with your PC as a second system? Lots of possibilities.

Is your valve pre one you built or bought?

Puffin · 9th December 2007, 01:59 PM

Thnks for that I have printed the details off and will read them later. I bought my Ming Da pre from Icon Audio. Excellent sound and value.

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22nd November 2007, 04:08 PM	#51
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	ianpengelly. I have just built one of the Chipamp kits. Running on one PS at the moment (but I built two for pure dual mono) I have ordered another tranny, but are intrigued as to how you ran both boards off what appears to be a dual secondary tranny. Did you just daisy-chain the secondary's from one board to the other?

8th December 2007, 09:57 PM	#52
ianpengelly diyAudio Member Join Date: Oct 2006	Hi Puffin, I just split each of the secondaries to wire up two PS boards, but like I said in my commentary it wasn't ideal because of the hum. Andrew, Nice work, a video would have been interesting to show what happened... I am slightly concerned that your fuse holder took off across the room! :-)

9th December 2007, 09:01 AM	#55
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	Can we see some pics of the inside of your pre-amp and how you propose to go active with it ? As you may remember I built a dual mono BrianGT amp. I have since made a P2P 3886 using Nuuk's excellent site (and his help on here !). Even made my own snubberised PS. Trouble now is I have two great sounding amps ( I used to have Audiolab per/power), but the one I slaved over for hours is the one that is running now ! I am using a valve pre, which semms to suit it very well. It has a lot of gain.

9th December 2007, 11:31 AM	#56
ianpengelly diyAudio Member Join Date: Oct 2006	I'll try and get some photos next time i have it open to wire up the later three inputs, as only the CD, Tuner and TV are wired in a the moment. I am planning on building a buffer based around the OPA627 to make it active, with a regulated PS. There are a few designs out but this is the one I am most likely to follow: http://www.platenspeler.com/diy/prea...chooser_3.html If you have two amps, why not bi-amp? Or go surround sound, or use one with your PC as a second system? Lots of possibilities. Is your valve pre one you built or bought?

9th December 2007, 01:59 PM	#57
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	Thnks for that I have printed the details off and will read them later. I bought my Ming Da pre from Icon Audio. Excellent sound and value.

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