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Post by johanz on Oct 23, 2023 5:58:41 GMT -7
Browsing the classifieds this Maz 18 Junior 2x12 combo caught my eye ... and curiosity ... On the back panel there's a '6V6 - EL84' switch ? Is this an 'official mod' that Dr Z might have done or ?
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Post by DRZ on Oct 23, 2023 6:54:56 GMT -7
No not a factory mod. But I must say it does sound like a cool mod. Z
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Post by Chilly Gibbons (Todd T.) on Oct 23, 2023 7:07:15 GMT -7
That sure would make for a lot of glass hanging down from that chassis. Interesting. Did they include any photos of the chassis?
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Post by John on Oct 23, 2023 7:26:39 GMT -7
This would not be a simple mod. 6v6 have larger sockets than el84....so it's not a matter of which do you want to install. (Choose only one) But rather it would require two additional power tube sockets to be installed, along with all the support wiring and components needed to make them run.
Sounds like a nightmare.
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Post by DRZ on Oct 23, 2023 8:29:57 GMT -7
This would not be a simple mod. 6v6 have larger sockets than el84....so it's not a matter of which do you want to install. (Choose only one) But rather it would require two additional power tube sockets to be installed, along with all the support wiring and components needed to make them run. Sounds like a nightmare. As I envision it it could be done. Yes not easily . But would it present that great of a sonic difference ? Similar output wattage, similar clean headroom, only a slight frequency variation 6V6/6n14n , also same preamp , so would it be worth the extra build , parts, and COST ? Z
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Post by scottyc13 on Oct 23, 2023 8:39:17 GMT -7
I’ve read on some of my DYI amp forums about this. Most agreed that sonically it didn’t make much difference as long as the preamp, PT, OT and everything else was the same. It would be a fun experiment if you like to tinker. I think there was also a commercially available amp that did this, but I can’t recall the brand.
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Post by KeithA on Oct 23, 2023 14:37:07 GMT -7
This would not be a simple mod. 6v6 have larger sockets than el84....so it's not a matter of which do you want to install. (Choose only one) But rather it would require two additional power tube sockets to be installed, along with all the support wiring and components needed to make them run. Sounds like a nightmare. I have an amp from another maker here with this exact setup. No nightmare. Neat and tidy. Subtle difference in sound. There was to be a bigger difference as the 6V6 side was also supposed to be 1/2 power. However, my particular amp is full power on both sets of tubes. Most may say not enough difference to warrant the setup. However, still neat setup.
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Post by headshrinker (Marc) on Oct 23, 2023 14:39:42 GMT -7
Divided By 13 has one and you can change from one set of tubes to the other on the fly. Egnator had, maybe has, one, it's been a long time since I owned one, that has 6V6s and EL84s and it has a blend knob on it, so you can gradually switch from one to the other. There was a real cool middleish position where you could hear the blending of the two tubes. Don't remember the name of either amp at the moment.
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Post by KeithA on Oct 23, 2023 15:10:31 GMT -7
Just for reference, here's what the topside layout of the chassis looks like.
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Post by Chilly Gibbons (Todd T.) on Oct 23, 2023 17:02:53 GMT -7
Just for reference, here's what the topside layout of the chassis looks like. Looks like Reinhard…
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Post by Chilly Gibbons (Todd T.) on Oct 23, 2023 17:09:26 GMT -7
This would not be a simple mod. 6v6 have larger sockets than el84....so it's not a matter of which do you want to install. (Choose only one) But rather it would require two additional power tube sockets to be installed, along with all the support wiring and components needed to make them run. Sounds like a nightmare. Not sure how easy it would be do correctly. There’s biasing and I would imagine the modder would have both tube types installed at the same time, switching between the two with the added switch on the back (in standby of course). Personally, I wouldn’t bother. I would invest my time in the front end, say ef86/12ax7 kind of stuff. But then I’d just buy a Z28 MKII and have the best of both.
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Post by premiumplus (Dave) on Oct 23, 2023 17:33:44 GMT -7
Looks like somebody's trying to boogie a Z...unnecessary clutter.
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Post by KeithA on Oct 24, 2023 3:26:25 GMT -7
Just for reference, here's what the topside layout of the chassis looks like. Looks like Reinhard… It is. It’s the Sultan. An amp built for Mark Knopfler based on the Trainwreck Liverpool.
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Post by KeithA on Oct 24, 2023 3:27:04 GMT -7
Hey Doc, if nothing else, it could be a winter project for the bench 😉
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Post by doctorice on Oct 24, 2023 6:08:12 GMT -7
Buy a MAZ 18, a Z-Plus and an A/B/Y box
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Post by Magic Dragon on Oct 25, 2023 10:39:32 GMT -7
I’ve read on some of my DYI amp forums about this. Most agreed that sonically it didn’t make much difference as long as the preamp, PT, OT and everything else was the same. It would be a fun experiment if you like to tinker. I think there was also a commercially available amp that did this, but I can’t recall the brand. The Mesa Blue Angel could switch between, or combine a pair of 6V6s or a quad of EL-84s. I had one for a while a long time ago. The concept was more interesting than the actuality.
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