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PostPosted: Sun Aug 30, 2009 2:54 pm 
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Bottle Rocket

Joined: Sun Aug 30, 2009 2:40 pm
Posts: 1
Hi All
I cannot seem to find the tube layout of my recto recording preamp. I did find what tube does what though.

Any help would be appreciated.

-Kevin


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PostPosted: Sun Aug 30, 2009 4:05 pm 
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Mark III

Joined: Sun Aug 16, 2009 9:44 am
Posts: 347
Location: Melbourne, Australia.
I assume you have the manual? If not, here is the link:

http://www.mesaboogie.com/manuals/Recti ... PreAmp.pdf

The layout is not really important, the 6 tubes are all the same - 12AX7A type dual triode tubes.

Are you planning on using different tubes for different gain stages or are you trying to diagnose a fault?

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PostPosted: Tue Sep 01, 2009 4:43 am 
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Mark III

Joined: Thu Jun 07, 2007 7:26 am
Posts: 189
Location: Southwest Louisiana Tone Swamps
I'm almost 100% certain the manual does NOT tell what each side of the 12ax7 does. Each triode does something different most of the time sometimes across channels I think. I had the diagram somewhere. It may be in a post someone replied to me. I discovered it eventually though. If you want I can find it. It is a graphic with the back and shows each half of the tube and what it does in the preamp.

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Ibanez:
1998 RG-550 DY
2001 RG-520 QSTB with EMG 81/85
2001 RG-770 FM DRD ("reissue" available in Japan and Europe only)

Line6 Pod XT Pro
Mesa Recto Recording Pre
Mesa 2:100
Mesa Oversize 4x12


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PostPosted: Wed Sep 02, 2009 4:57 am 
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Mark III

Joined: Thu Jun 07, 2007 7:26 am
Posts: 189
Location: Southwest Louisiana Tone Swamps
Ok I found the layout that Mesa sent me.
I decided to condense it but have also kept the original for you to compare notes with.

Here are Clickable Thumbnails for each.

The first is the original from Mesa:
Image

Here is the version I created:
Image

So it seems that part of V2, all of V3, and all of V4 are relevant to those who want to mess with Channel 2's sound. This is where I put the 2 new tubes I bought. Slight change I think. Hard to say.

_________________
Ibanez:
1998 RG-550 DY
2001 RG-520 QSTB with EMG 81/85
2001 RG-770 FM DRD ("reissue" available in Japan and Europe only)

Line6 Pod XT Pro
Mesa Recto Recording Pre
Mesa 2:100
Mesa Oversize 4x12


Last edited by mikeymike on Sat Dec 30, 2017 9:02 pm, edited 1 time in total.

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PostPosted: Sat Dec 30, 2017 4:08 am 
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Bottle Rocket

Joined: Sat Dec 30, 2017 4:01 am
Posts: 1
Hi,

I know this is a really old thread but I just can't find the layout of those tubes.
The images posted here are no longer available, unfortunately.
Can anybody help me find out which tube is which and does what for the recording preamp?
I need to retube mine and I'd like to experiment a bit before just going for 6 spax tubes...

Thanks,
Bobby


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PostPosted: Sat Dec 30, 2017 5:27 pm 
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Mark III

Joined: Thu Jun 07, 2007 7:26 am
Posts: 189
Location: Southwest Louisiana Tone Swamps
Neverwind wrote:
Hi,

I know this is a really old thread but I just can't find the layout of those tubes.
The images posted here are no longer available, unfortunately.
Can anybody help me find out which tube is which and does what for the recording preamp?
I need to retube mine and I'd like to experiment a bit before just going for 6 spax tubes...

Thanks,
Bobby


Hey man! I still have these images somewhere on my old harddrive that's messed up. If I can manage to pull them up I will update!

For those looking for help, this is the best I can offer until I find the images and re-host them on imgur
viewtopic.php?t=37205#p277531


I recently re-hosted another tube diagram chart I posted a long time ago so don't lose hope! viewtopic.php?f=5&t=22100

_________________
Ibanez:
1998 RG-550 DY
2001 RG-520 QSTB with EMG 81/85
2001 RG-770 FM DRD ("reissue" available in Japan and Europe only)

Line6 Pod XT Pro
Mesa Recto Recording Pre
Mesa 2:100
Mesa Oversize 4x12


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PostPosted: Sat Dec 30, 2017 8:59 pm 
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Mark III

Joined: Thu Jun 07, 2007 7:26 am
Posts: 189
Location: Southwest Louisiana Tone Swamps
Good news everyone I found the files! Like the original post, these are clickable to bring you to the full sized version
Original file from mesa:
Image

compact version I made:
Image

I have no idea why I felt the need to re-organize the pic, it made sense at the time.... :roll:

_________________
Ibanez:
1998 RG-550 DY
2001 RG-520 QSTB with EMG 81/85
2001 RG-770 FM DRD ("reissue" available in Japan and Europe only)

Line6 Pod XT Pro
Mesa Recto Recording Pre
Mesa 2:100
Mesa Oversize 4x12


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