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Author Topic: Tweaked Layout  (Read 69783 times)
jzucker
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« on: April 30, 2008, 09:25:01 PM »

Thanks to Gil Ayan and Scott Lerner!

http://www.sheetsofsound.net/images/OvertoneModded.pdf

Here's the BOM. Quantities are approximate. I suggest ordering a few extra of everything except the 350v electrolytic caps. These are the mouser catalog numbers.

(2) 140-XAL350V47-RC 350V 47uF 20%    
(2) 588-45F470E 5watts 470OHMS 1%    
(1) 72-RWM410-3K9-5 3.9k 3watts 5%
(3) 75-516D475M063-E3 4.7uF 63volts 20%
(3) 598-CD16FD331JO3F 330pF 500V +/-5%
(1) 598-CD15FD391JO3F 390pF 500V +/-5%
(1) 140-500S5-121K-RC 120pF 500V +/-10%
(2) 660-MF1/2LLT52R222J 2.2Kohms 5%    
(2) 71-RL20S-G-3.3K 1/2WATT 3.3KOHMS 2%    
(2) 660-CF1/2CT52R154J 150K ohm 5%    
(2) 71-CMF60150K00FHEK 1/2watt 150Kohms
(4) 71-RL20S-G-220K 1/2WATT 220KOHMS 2%
(2) 660-CF1/2C184J 1/2Watt 180Kohms 5%

« Last Edit: May 04, 2008, 08:10:21 PM by Kitarist » Logged
Mondoslug
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« Reply #1 on: April 30, 2008, 10:50:16 PM »

Looks great Jaz...how do I reorient this thing or see the whole view? If I shrink it I still only get the area showing now. Operator error no doubt.
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stevorc321
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« Reply #2 on: April 30, 2008, 11:30:26 PM »

Yeah this will be fantastic - but I can only see a small section of the layout at the moment Huh?
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mcinku
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« Reply #3 on: May 01, 2008, 03:19:19 AM »

Yes, just the power and PI section is visible.
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jake
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« Reply #4 on: May 01, 2008, 07:05:02 AM »

Your tweek needs a tweek.

Jack, no joke, thanks for all the info you're passing on.
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jzucker
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« Reply #5 on: May 01, 2008, 03:20:31 PM »

not sure what the problem is. I re-uploaded it and it seems to be ok now.
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mcinku
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« Reply #6 on: May 01, 2008, 03:23:28 PM »

Yes it's fine now

Thanks
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Mondoslug
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« Reply #7 on: May 01, 2008, 03:38:12 PM »

Great job Jack! Thanks.
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Mitch
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« Reply #8 on: May 01, 2008, 04:57:10 PM »

Nice work!  Grin Grin Grin Just did the tweaks in a few minutes & although could only test at extremely low power- I can already hear the top end is much smoother & has lost that slightly abrasive edge - I suspect that is mainly the removal of the  high pass cap on the master vol?  I've left the other component legs connected so I could easily reconnect them should I want to reverse the mods - might be a useful tip guys?  Not sure what the resistor & the cap on the effex in/outs was doing anyway - anyone know?   Huh?
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jzucker
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« Reply #9 on: May 01, 2008, 05:46:50 PM »

Nice work!  Grin Grin Grin Just did the tweaks in a few minutes

You sure you did them all? Not all of them were circled. It should take you 40-60 minutes to do them all.
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kenster
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« Reply #10 on: May 01, 2008, 06:44:35 PM »

Jack -

I'm re-posting a big thanks here. This is exactly what I and others here needed.

It seems to me that my concern for the caps holding any dangerous reserve current that could harm you is not warranted, that they seem to drain fairly quickly once the OTS shuts off. Has that been your observation or do you take other precautions when working inside your chassis?

I can't wait to get inside the chassis tomorrow!

Ken
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Mondoslug
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« Reply #11 on: May 01, 2008, 06:52:01 PM »

I was nervous as hell the first time going in also.

Jack...again. Fantastic job on the tweaked layout!
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jake
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« Reply #12 on: May 01, 2008, 09:16:25 PM »

Me too, I could only do a couple as some of the parts I orderd aren't right. I so happy the amp fired up that I'm not sure about the tweeks, I'd say I like them but I need some time to tell for sure.
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Mitch
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« Reply #13 on: May 01, 2008, 11:13:06 PM »

Nice work!  Grin Grin Grin Just did the tweaks in a few minutes

You sure you did them all? Not all of them were circled. It should take you 40-60 minutes to do them all.

I realise there's other component changes- I did the real easy one's first & checked the effect on my tone straight away- I can then easily reverse the mods should I not like them- I stopped because the simple mods did the trick as far as I'm concerned- I was already pretty happy with my stock OTS. I may delve further once I've had the chance to try at gig levels, as that's where it really counts!  Thanks again for the mod sheet! Great work!
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Relicula
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« Reply #14 on: May 02, 2008, 10:47:25 AM »

What does snipping the cap on the master volume do for the tone?
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