new gainclone w/ reg supply (pics)

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oldfatbubba

oldfatbubba

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Joined 2006

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oldfatbubba

oldfatbubba

Disabled Account
Joined 2006
Thank you. :)

The source is a homebrew tube preamp. It's a simple, SRPP topology using 12AU7s (or whatever variant that happens to be handy). It has clean DC on the filaments and a regulated power supply.

Here are the guts....

http://home.comcast.net/~eric.erickson/gainclone/preamp2.JPG

The signal caps are Multicaps but the rest of the parts are mediocre. Regardless, it sounds good.
 

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davidlzimmer

Member
Joined 2006
I like the idea of a glass top. If you listen at moderate levels, you will probably not have a problem with heat. IMHO your heatsinks are on the skimpy side. So, beware of trying to reproduce rock concerts in your living room. :D

Are you new to gainclones? If so, you have a pleasant surprise in store. The burn in period! The sound will get sweeter and more "musical'.

Cheers!
 
oldfatbubba

oldfatbubba

Disabled Account
Joined 2006
davidlzimmer said:
IMHO your heatsinks are on the skimpy side.
Click to expand...

Perhaps, but they barely got warm after 12 hours. I was somwhat worried about the size of the regulator heatsinks but they were even cooler!

davidlzimmer said:
Are you new to gainclones? If so, you have a pleasant surprise in store. The burn in period! The sound will get sweeter and more "musical'.
Click to expand...

This is the first Gainclone though I've build several tube/valve based power amps, though.

RE: burn-in, what do you recommend? I was contemplating either:
1) using a signal generator at, lets say 1 kHz,
2) tuning between two FM stations,
3) pink noise software such as....

http://www.sharewareconnection.com/test-tone-generator.htm
 
BWRX

BWRX

Ex-Moderator
Joined 2005
barred_boss on ebay has some great heat sink material at a very low price. I'd highly recommend looking into getting some of it for your amp.

Here's a link to one of his auctions: http://cgi.ebay.com/HEATSINK-ALUMIN...ryZ31489QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Also, the orientation of the heat sink as you have them now is not optimal. The fins should be running up and down (for the best convection cooling) instead of side to side. In other words, rotate the heat sinks 90 degrees and see if that makes a difference.
 
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