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Author Topic: Tweaked Layout  (Read 144752 times)
hywelg
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« Reply #30 on: May 06, 2008, 12:41:07 PM »

but the Overtone uses toggles, and the pins on the toggle are "opposite" the throw of the lever.


mmmmm, thats why my footswitch only works when toggles are set to manual!. I thought I had just wired it wrong!!

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Alpedra
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« Reply #31 on: May 08, 2008, 01:38:20 PM »

By the way.. any tips on getting the same components from Jzucker´s BOM inside the EU? Wink
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Overtone + 36W ef86 TMB = Tone Heaven
hywelg
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« Reply #32 on: May 08, 2008, 01:42:41 PM »

I'm still trying to find a good source here in the UK but it seems you can't get the same makes, and I don't know which are good and which aren't. You can get Spragues here http://www.hotroxuk.com/store/erol.html

But his supply of resistors is very limited.

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Steven_nl
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« Reply #33 on: May 10, 2008, 06:57:58 AM »

Maybe
www.conrad.com

hope this helps
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poipounder57
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« Reply #34 on: May 10, 2008, 10:57:05 PM »

I'm planning on doing my mod on my OT in a couple of days.  Just waiting on the parts to arrive.  I have been going through the list that Jack posted and comparing it to the tweaked layout.  I see only 1-150k resistor highlighted in red on the layout....the list calls for 2-metal film and 2-carbon film 150k resistors.  Which one do I use?  (Metal or carbon) Are the overage parts spares?  Sorry...noobie Embarrassed just wanting to be sure it's done right  Grin
Mahalo (Thanks)!!! Grin
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Rocking on a rock in the middle of the Pacific:-)
René F
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« Reply #35 on: May 11, 2008, 09:47:32 AM »

I'm still trying to find a good source here in the UK but it seems you can't get the same makes, and I don't know which are good and which aren't. You can get Spragues here http://www.hotroxuk.com/store/erol.html

But his supply of resistors is very limited.



Maybe check out

http://www.banzaieffects.com/

René
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kenster
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« Reply #36 on: May 13, 2008, 10:45:42 AM »

hey poipounder57

Yes, there are some parts in Jack's list that aren't needed. I believe the 150K resistor is one of those, perhaps the only one as I recall.  Where I could, I just replaced like with like. It's nothing to be too concerned over. If we get to the point where we start trying to hear the difference between a metal film resistor and a carbon based one, we're over the top IMHO.  Shocked That's when this guy starts heading for the door!


Ken
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chipdog
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« Reply #37 on: May 13, 2008, 03:34:11 PM »

I'm planning on doing my mod on my OT in a couple of days.  Just waiting on the parts to arrive.  I have been going through the list that Jack posted and comparing it to the tweaked layout.  I see only 1-150k resistor highlighted in red on the layout....the list calls for 2-metal film and 2-carbon film 150k resistors.  Which one do I use?  (Metal or carbon) Are the overage parts spares?  Sorry...noobie Embarrassed just wanting to be sure it's done right  Grin
Mahalo (Thanks)!!! Grin

I'm in the same canoe - not much experience and trying to match up parts with the schematic. I created a spreadsheet comparing the BOM and schematic and sent it to Jack for comment. Hopefully he'll have the time to look it over and post a reply.
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scotto
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« Reply #38 on: May 13, 2008, 06:23:34 PM »

Mods finally done on mine. Massive improvement in the clean setting.  Blackface Fenderish.  Overdrive is also improved, but I'm getting much better sound from a bridge single coil than a variety of humbuckers.  My Seth Lover PAF doesn't sound very good at all.  It's in a Gibson scale length neck.  Suggestions?
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poipounder57
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« Reply #39 on: May 13, 2008, 10:58:31 PM »

Thanks again kenster!!!  I just rec'd my stuff from Mouser...hope to do the mods tomorrow. 
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Rocking on a rock in the middle of the Pacific:-)
Mitch
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« Reply #40 on: May 14, 2008, 02:23:26 AM »

Mods finally done on mine. Massive improvement in the clean setting.  Blackface Fenderish.  Overdrive is also improved, but I'm getting much better sound from a bridge single coil than a variety of humbuckers.  My Seth Lover PAF doesn't sound very good at all.  It's in a Gibson scale length neck.  Suggestions?

I had similar issues with a set of SD antiquity's in my Les Paul- they sounded a bit too 'dark'?  I solved this by replacing with humbucker sized P90's (single coils) which I much prefer- now I'm getting that David Gilmour neck pup tones and much more bite from the bridge.  Speaker type will also play a huge part- I love the G12-65 for lead tones- but it lacks a little sparkle for clean- so I'm having a cab built combining a G12-65 & either a Vintage 30 or Alnico Gold inside.  Try a brighter speaker- you can always cut the treble for Strats!
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chipdog
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« Reply #41 on: May 14, 2008, 01:55:13 PM »

I'm attaching a pdf file comparing the BOM list parts, Mouser inventory and Schematic parts in red text (to the best of my eyesight). Can anyone help a newbie out and explain the discrepancies in the lists? I highlighted in yellow those parts where the component value appears different from the schematic (e.g. 4.7uF 63 volts Caps on the BOM versus 4.7uF 25 volts Caps on the schematic), or where the quantities on the BOM differ from the schematic (e.g., BOM lists four 220K Ohms resistors versus two identified on the schematic).



* modslist.pdf (22.48 KB - downloaded 615 times.)
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kenster
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« Reply #42 on: May 14, 2008, 02:16:18 PM »

chipdog -

In a nutshell, a cap/resistor with a higher voltage rating is actually good. In the case of a cap being .47uf vs. .50uf, well, that's pretty close and getting the exact values aren't always possible. When you take the tolerances into consideration, +/- 5% in most cases, it's essentially the same callout.

Note that tighter tolerances are often preferred but you often pay a price premium for it. In most cases a really high tolerance, such as +/- 1%, isn't req'd. There are a couple of instances where that tight a tolerance is called for and I would stick with those for where they have been indicated to be used on the layout.

Hope that helps a bit.
Ken
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chipdog
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« Reply #43 on: May 14, 2008, 02:18:02 PM »

Thanks Ken, that helps a lot. Regarding the schematic list, do you think I caught all of the "red-letter" items that should be modded?
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kenster
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« Reply #44 on: May 14, 2008, 06:31:13 PM »

chipdog

Nicely laid out list. Grin It looks correct as far as I can tell. To be smart, I think it wise to order a few more (2-3 maybe?) of each of the parts, particularly the large 470 ohm 5 watt resistor. They fit into a tight spot on the base of the power tubes and I boogered one up trying to get the bends correct. Better to have a few left over than come up short and have to re-order and pay an extra shipping fee.

Besides, more mods may come up and you might have a leg up on them with a few extra parts around. You just never know!

Cheers -
Ken
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