My SLO Clone Build

FourT6and2 · Post by **FourT6and2** » Wed Jul 30, 2014 12:23 am

Just finished this one. It was super fun! No real problems at all. I decided to elevate the heaters. No noise or anything. Pretty quiet. Just a little hiss with the gains and masters up past 12:00, which is in cranked/dimed territory by that point.

neikeel · Post by **neikeel** » Wed Jul 30, 2014 7:09 am

More pics and more inFo please?

wdelaney72 · Post by **wdelaney72** » Wed Jul 30, 2014 9:09 am

Seconded!
Looks great. I know there's the SLO clone forum. Last I checked over there I wasn't clear if people still had the trannys and boards available.

It's a beautiful build....let's see MORE!

FourT6and2 · Post by **FourT6and2** » Wed Jul 30, 2014 11:56 am

I used O'Netics transformers from C3. Pretty much a stock SLO circuit except I went with a 33K input grid resistor on V1 instead of 68K, and I elevated the heaters with a DC reference off of the Choke to about 40-45 volts to help with any potential noise and to alleviate some of the stress on the cathode follower preamp tubes.

Build diary and more photos can be found here (this forum won't let me post the photos since they're too large, and I don't want to spend the time to resize them): http://www.rig-talk.com/forum/viewtopic ... 3&t=156129

Haze13 · Post by **Haze13** » Thu Jul 31, 2014 3:16 pm

Very Clean! Looks grate! Hope it sounds as it looks.

neikeel · Post by **neikeel** » Thu Jul 31, 2014 4:38 pm

Haze13 wrote:Very Clean! Looks grate! Hope it sounds as it looks.

Yes I skimmed the thread linked, looks great, like the comparison at the end to. The high quality pics are, as you would expect, outstanding!

wdelaney72 · Post by **wdelaney72** » Fri Aug 01, 2014 11:48 am

Great job documenting the build. I've never played a SLO but find it intriguing and would like to build one someday. Right now I am focused on building the cab for my latest dual Marshall build.

With some help from SDM, I've played around with the input grid resistors. Very much correct that 68K input provides a lot of hiss....brand of resistors also contribute. I use the Vishay / Dale metal film resistors (RN65) and they help tame the hiss a lot...carbon film and carbon comp too noisy in any type of MV setting. Also....went down to 15K input resistors and did 100pF cap over the plate and cathode. no noise and very quiet...doesn't mess with tone at all and keeps hiss to minimum.

FourT6and2 · Post by **FourT6and2** » Fri Aug 01, 2014 12:02 pm

Yeah, if I do another build I might go with a lower value on the input grid. There is a good amount of hiss in the SLO circuit as is. And I'll add a loop bypass switch along with maybe a tweak here and there for a more modern, tighter sound with more mid-range emphasis. And I'll use polyester MKT368 caps instead of the Sprague 716s.

Omn · Post by **Omn** » Sun Aug 03, 2014 7:30 am

High quality build, and a great diary! Best I have ever seen out there. Will come in handy for anyone building a SLO clone.
Thank you!

axeman · Post by **axeman** » Fri Aug 08, 2014 12:13 am

Yes the info is good. He set the standard.

FourT6and2 · Post by **FourT6and2** » Sun Aug 10, 2014 11:27 pm

Clips. Recorded with my laptop's webcam, soooo not the greatest quality but you'll get the idea.

CLEAN:

[youtube]http://www.youtube.com/watch?v=taccpnJ4g3E[/youtube]

OVERDRIVE:

[youtube]http://www.youtube.com/watch?v=ERzvVYhSKcM[/youtube]

Omn · Post by **Omn** » Mon Aug 11, 2014 3:57 pm

Nice clean! Noise free, it seems.
Overdrive seems to be tight and well "articulated" - with chords every single note rings evenly.
Must be great "in person".

Prowler · Post by **Prowler** » Mon Aug 11, 2014 9:56 pm

Looks great and sounds awesome!

uiovbged332 · Post by **uiovbged332** » Wed Jul 06, 2022 12:58 pm

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My SLO Clone Build

My SLO Clone Build

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