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Post by Vincent R. on Jun 19, 2022 6:36:22 GMT -6
Listening to the clips I thought the U67 had a deeper low end and more air on the top. The BU67 had a bit more midrange, which I thought sounded nice. After reading the description on the Beesneez I see they are using a Mullard tube. Those tubes tend to be slightly darker on the top end and more beefy in the mids. That could account for a bit of the differences. I asked what tube was in the U67.
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Post by Vincent R. on Jun 19, 2022 6:52:52 GMT -6
The U67 was using a Telefunken Silver mesh EF86 tube. Those Telefunken’s tend to reach a bit deeper in the low end, but be more open on the top. The Millard’s tend to be beefier in the mids and less open in the top. I have an Amperex in my Neumann modified MK U67 and it sits somewhere in the middle. Anyway, the tube differences could account for a lot of the subtle sonic differences.
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kcatthedog
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Post by kcatthedog on Jun 19, 2022 8:13:55 GMT -6
Also, suggests that one could roll tubes to find whatever your preferred sound is .
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Post by indiehouse on Jun 19, 2022 9:19:58 GMT -6
Also, suggests that one could roll tubes to find whatever your preferred sound is . Actually, not true. Not in the BU67, at least. He's using a unique type of tube in which the audio grid leaves the top of the tube, so it won't line up with other EF86 tubes. Basically they aren't swappable. I asked a while back. |
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Post by Quint on Jun 19, 2022 11:00:30 GMT -6
Also, suggests that one could roll tubes to find whatever your preferred sound is . Actually, not true. Not in the BU67, at least. He's using a unique type of tube in which the audio grid leaves the top of the tube, so it won't line up with other EF86 tubes. Basically they aren't swappable. I asked a while back. I'm not sure how this affects the circuit, but does this not then mean that this is an "inspired by" kind of circuit, and not necessarily trying to be a 1:1 clone? |
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Post by Vincent R. on Jun 19, 2022 12:19:22 GMT -6
Also, suggests that one could roll tubes to find whatever your preferred sound is . Actually, not true. Not in the BU67, at least. He's using a unique type of tube in which the audio grid leaves the top of the tube, so it won't line up with other EF86 tubes. Basically they aren't swappable. I asked a while back. Interesting. |
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Post by Tbone81 on Jun 19, 2022 12:33:54 GMT -6
Actually, not true. Not in the BU67, at least. He's using a unique type of tube in which the audio grid leaves the top of the tube, so it won't line up with other EF86 tubes. Basically they aren't swappable. I asked a while back. I'm not sure how this affects the circuit, but does this not then mean that this is an "inspired by" kind of circuit, and not necessarily trying to be a 1:1 clone? If I'm reading the description on their site correctly (and I'm not sure I am), the change is in the location of the grid inside the tube, so I'd imagine that may change the pin out but not the function of the tube. So in theory that wouldn't effect the circuit...but who knows, its any bodies guess right now. |
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Post by Quint on Jun 19, 2022 13:01:22 GMT -6
I'm not sure how this affects the circuit, but does this not then mean that this is an "inspired by" kind of circuit, and not necessarily trying to be a 1:1 clone? If I'm reading the description on their site correctly (and I'm not sure I am), the change is in the location of the grid inside the tube, so I'd imagine that may change the pin out but not the function of the tube. So in theory that wouldn't effect the circuit...but who knows, its any bodies guess right now. Even if it doesn't actually affect the circuit, the idea that you apparently wouldn't be able to easily swap out the tube (and that it would require a non-standard tube) is not something that I love. |
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kcatthedog
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Post by kcatthedog on Jun 19, 2022 13:27:47 GMT -6
If the pin out is the same , then theoretically , you could try another tube of the same type. I know about the theoretical concern but for example often when I checked the voltage on my mk-u47 psu it may have varied and I used different tubes with it.
So, does the change Ben made, actually mean only one specific type of tube functions in that circuit?
I don’t talk to Bowie much now, but would be interesting to get another opinion about whether one could roll tubes or not.
Personally, I like rolling tubes and listening for desirable differences.
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Post by indiehouse on Jun 19, 2022 13:41:52 GMT -6
If the pin out is the same , then theoretically , you could try another tube of the same type. I know about the theoretical concern but for example often when I checked the voltage on my mk-u47 psu it may have varied and I used different tubes with it. So, does the change Ben made, actually mean only one specific type of tube functions in that circuit? I don’t talk to Bowie much now, but would be interesting to get another opinion about whether one could roll tubes or not. Personally, I like rolling tubes and listening for desirable differences. Me: “Oh cool! So yeah, doesn’t look like I could swap in any of my other standard EF86 tubes.” BeezNeez: “ No as the grid wont line up. Same tube, but better spec.” |
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kcatthedog
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Post by kcatthedog on Jun 19, 2022 14:00:27 GMT -6
I agree with you, it would be preferable to be able to roll tubes.
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Post by seawell on Jun 22, 2022 19:43:40 GMT -6
I got to chat with Ben on the phone for a while today while he was building my mic! A couple of things came up that I wasn't aware of yet. There are a couple of switches inside the mic that I think are really going to come in handy. 1 removes the S2 broadcast filter which was a common mod for vintage 67s. The other switch(by the transformer) switches between U67 and M269 mode! This thing is going to be a beast...can't wait to get it soon.
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Post by chessparov on Jun 29, 2022 17:13:58 GMT -6
Congrats! Ben is very kindly sending a BU67 my way. To test/record/review. I'm excited!  Will keep you guys updated as pertinent. The U67 and 269 styles are among my list of "dream mics". This may well turn out to be a long term purchase goal... Partly as I have to see how my medical expenses end up, after being in the hospital. I do expect it to put more of a fire in me, to create some side "entertainment money".  Chris |
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Post by Vincent R. on Jun 29, 2022 18:01:38 GMT -6
That’s awesome. I’d love to get my hands on one to really hear it myself.
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Post by timcampbell on Jun 29, 2022 18:23:52 GMT -6
It is a bit funny. Ben and I know each other very well. One year at Frankfurt I shared a booth with Ben, Tony Fishman, Fletcher and Jakob Erland.
Last night out of the blue he called me just to chat. We talked for about 2 hours. He is busy as a bee (haha) building these things and he sends his regards.
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Post by chessparov on Jun 29, 2022 18:40:47 GMT -6
Way cool Tim.
(at the booth where was Munson though?)
Thanks guys.
Chris
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Post by timcampbell on Jun 29, 2022 18:51:06 GMT -6
Way cool Tim. (at the booth where was Munson though?) Thanks guys. Chris Hahahaha. Obviously you never met Fletcher back in the day. That year there was a poor piano player directly across from our booth. After him playing all day long the first day Fletcher went over and told him if he played the rest of the days he would kill him. The rest of the show the piano man was sheepish and quiet.
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Post by seawell on Jun 29, 2022 18:55:02 GMT -6
Way cool Tim. (at the booth where was Munson though?) Thanks guys. Chris Hahahaha. Obviously you never met Fletcher back in the day. That year there was a poor piano player directly across from our booth. After him playing all day long the first day Fletcher went over and told him if he played the rest of the days he would kill him. The rest of the show the piano man was sheepish and quiet.
LOL I don’t know him personally but enjoyed his banter on the forums over the years. I would’ve loved to have been a fly on the wall hearing you & Ben chat, 2 of the absolute best 👍🏻 Very cool to learn about your friendship. Cheers. |
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