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Post by guitarboy02451 on Dec 15, 2006 8:39:05 GMT -7
I asked this question in the ask the experts section, but I thought I'd throw it out here for discussion.
I put a 5751 in the V3 PI position on my Maz Sr and liked it. So I ordered a matched and balanced triode to try out.
Any one try a 5751 in v3 pi before? Any thoughts or recomendations?
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swampstomper
Full Member
The only thing that really worried me was the ether.
Posts: 136
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Post by swampstomper on Dec 16, 2006 3:03:53 GMT -7
I asked this question in the ask the experts section, but I thought I'd throw it out here for discussion. I put a 5751 in the V3 PI position on my Maz Sr and liked it. So I ordered a matched and balanced triode to try out. Any one try a 5751 in v3 pi before? Any thoughts or recomendations? I've been thinking about getting some 5751s to try in my MAZ 18. What changes did you notice when putting one in the PI socket?
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Post by guitarboy02451 on Dec 16, 2006 8:45:39 GMT -7
I asked this question in the ask the experts section, but I thought I'd throw it out here for discussion. I put a 5751 in the V3 PI position on my Maz Sr and liked it. So I ordered a matched and balanced triode to try out. Any one try a 5751 in v3 pi before? Any thoughts or recomendations? I've been thinking about getting some 5751s to try in my MAZ 18. What changes did you notice when putting one in the PI socket? Here is what I noticed. The 12ax7lps had some kind of notchy bandwith that was driving me mad. When a/b'ing next to my Ghia, the ghia attack was more clean. Sort of Eric Johnson'ish. On the Ghia I had more control with the guitar volume. I also had the Ghia cranked pretty good and had my AC Booster on. But when I switched over to the SR, I didn't get the same attack. I pulled the 5751 out of V2 on the Ghia (figuring that is the PI since there are only two and a JJECC is in V1) and put it in v3 PI of the SR. What I noticed was that notchyness went away. The amp became more controlable, or more sensitive to the AC and Guitar Volume. It was a tad cleaner, but keeping the stock ECC's in V1/V2 drove it pretty good. I went back and forth. The LPS was a little more boomy, more harsh and had more mids. The 5751 was even and smooth. I don't know... You know we all get crazy with this stuff to the point of clinical neurosis... You know, try the same thing over and over and expect different results, but I really did hear something, and I said, that is probably why I love the Ghia so darn much. So I ordered two Matched/balance + Tested 5751's from the Tube Depot. We'll see. One is definately going in V3, I'll probably put the other one in V2 (tone stack) and keep the ECC83 in V1 for the driver. Then I'm done... Really this time. I'm just wondering if anyone else here has done it and what advice they can recommend. And the second thing I'm wondering is why did I notice a change in tone by changing the V3 PI? I thought the PI wasn't a tone sculpting position? pg
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Post by jwr on Dec 16, 2006 16:11:22 GMT -7
It's not a tone sculpting position, but it effects how your output section is going react. I really like the LPS if I want my output section to have an agressive nature. 5751, AT7, AY7, AU7 all will yield a different tone or attitude in the output section.
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Post by myles on Dec 19, 2006 11:13:50 GMT -7
If you are talking about the NR model, then this is the phase inverter and would give you a bit more clean headroom.
If you are talking about the reverb model the reverb would not be as full as the tube in that position is normally a 12AT7 that has almost ten times the current drive of a 5751.
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Post by guitarboy02451 on Dec 20, 2006 7:58:48 GMT -7
If you are talking about the NR model, then this is the phase inverter and would give you a bit more clean headroom. If you are talking about the reverb model the reverb would not be as full as the tube in that position is normally a 12AT7 that has almost ten times the current drive of a 5751. Hey Myles, Thanks for your reply. I caught your reply to the same question in the ask the experts section as well. Yes, it's a NR model. I actually heard that you setup a SR NR for Brad Paisley and you had a 5751 in V3 PI and V1. Since I have two 5751's that just came in, do you recommend this configuration? Again thanks for all your time and dedication to helping us forum Z members. Paul
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swampstomper
Full Member
The only thing that really worried me was the ether.
Posts: 136
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Post by swampstomper on Dec 20, 2006 17:12:43 GMT -7
Hey Myles, Thanks for your reply. I caught your reply to the same question in the ask the experts section as well. Yes, it's a NR model. I actually heard that you setup a SR NR for Brad Paisley and you had a 5751 in V3 PI and V1. Since I have two 5751's that just came in, do you recommend this configuration? Again thanks for all your time and dedication to helping us forum Z members. Paul Hey Paul, I'm interested in trying this out also. What 5751 tubes did you get? How are they working out?
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Post by guitarboy02451 on Dec 20, 2006 20:28:31 GMT -7
Hey Swampstomper, I did some tube swapping tonight and here is what I liked. (I have a NR) V1 JJ ECC83 V2 5751 V3 5751 I tried V1 5751 and V3 5751 but there was a drop in power. I went back and forth swapping the 12ax7LPs and the ECC83's back and forth... but the above configuration is what I liked best. I got the tubes from Tube Depot. Prices were cheap and the shipping was well packed and fast. www.TubeDepot.com
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Post by myles on Dec 21, 2006 12:39:41 GMT -7
If you are talking about the NR model, then this is the phase inverter and would give you a bit more clean headroom. If you are talking about the reverb model the reverb would not be as full as the tube in that position is normally a 12AT7 that has almost ten times the current drive of a 5751. Hey Myles, Thanks for your reply. I caught your reply to the same question in the ask the experts section as well. Yes, it's a NR model. I actually heard that you setup a SR NR for Brad Paisley and you had a 5751 in V3 PI and V1. Since I have two 5751's that just came in, do you recommend this configuration? Again thanks for all your time and dedication to helping us forum Z members. Paul Paul, Actually, on my black head which Brad used two Xmas shows ago, it had a 5751 in V1 and V5 as it is a reverb model.
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swampstomper
Full Member
The only thing that really worried me was the ether.
Posts: 136
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Post by swampstomper on Jan 12, 2007 21:30:47 GMT -7
Hey Swampstomper, I did some tube swapping tonight and here is what I liked. (I have a NR) V1 JJ ECC83 V2 5751 V3 5751 I tried V1 5751 and V3 5751 but there was a drop in power. I went back and forth swapping the 12ax7LPs and the ECC83's back and forth... but the above configuration is what I liked best. I got the tubes from Tube Depot. Prices were cheap and the shipping was well packed and fast. www.TubeDepot.com I've been doing some tube swapping in my Maz 18 NR. I've only swapped out V1 so far. The stock tube was a JJ 12AX7. I've tried a Tung Sol 12AX7 and NOS JAN 5751 so far. It can be difficult to do this because the differences are fairly subtle and you have to wait for the tubes to cool down some before swapping. Of course you could record, but that complicates things and introduces another variable to the equation. It could be that what you like through a particular mic may not be what you like in a live room. One thing that made it a bit easier for me was to set my Maz 18 combo up on a table upside down with the upper panel removed. It was just easier to see what I was doing and get the tubes aligned properly. I liked the way both the JJ and Tung Sol sounded. The difference was subtle, but I liked both. I really like the way the 5751 sounds. It has a bit less volume, but it didn't affect the gain level as much as I thought it would. I like the character of the tone it gives me. It seems warmer and more sensitive to pick attack. It's hard to find the time and the right environment to test tubes like this, but it's quite a revelation when you do. I've got a few others yet to try and I still want to try the 5751 in the PI as Paul has. I'll report back if I find anything interesting. BTW Paul, I'm a NE guy transplanted to FL. Got some good tix to the game in JAX a few weeks ago. Great fun. GO PATS!
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Post by whitestrat on Jun 2, 2007 17:34:52 GMT -7
Ah shucks, my secret is out of the bag. I use an NOS RCA Command 5751 in V3 of my Germino Club 40 and my Route 66. This is a great tube that is very musical and sweet sounding in any position that calls for a 12ax7, but I really like them as phase inverters. I believe Mike at KCA has them. Be sure and get the RCA Command 5751, it's the best sounding and most musical IMO. I have some GE's that are not nearly as musical sounding.
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Post by flem on Jun 2, 2007 21:27:08 GMT -7
I didn't like the 5751 in my mazjr w/r in the PI or the 1st pre stage. I did like it in the PI of my Z28 though. A good balance of headroom and breakup for my taste.
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Post by mikekca on Jun 6, 2007 5:26:42 GMT -7
Ah shucks, my secret is out of the bag. I use an NOS RCA Command 5751 in V3 of my Germino Club 40 and my Route 66. This is a great tube that is very musical and sweet sounding in any position that calls for a 12ax7, but I really like them as phase inverters. I believe Mike at KCA has them. Be sure and get the RCA Command 5751, it's the best sounding and most musical IMO. I have some GE's that are not nearly as musical sounding. The regular RCA blackplates are spectacular as well. I honestly can't hear the difference between the Command Series tubes and these.
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Post by hdahs143 on Jun 6, 2007 6:42:43 GMT -7
I've loved the 5751's in my MAZ38 when I had it. I had them in V1 & V5. Even though the PI slot isn't necessarily a tone shaping position, I could hear a difference. The 5751's are just warmer, with a beautiful top end. My HR Deville has one in V2 now(V1-GT12AX7M, V3-Mullard 12AT7). Makes the Fender a lot more toneful.
The only problem I had with 5751's was that for whatever reason, some of them would hum in V1 of my MAZ 38. I found some GE 5 STARS that sounded great and didn't hum. Doc also suggested RCA Command Series.
The RCA blackplate that Mike @ KCA carries, sounds spectacular by the way.
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Post by Buzz Fretwear (Ignatius) on Jun 6, 2007 20:18:21 GMT -7
The only problem I had with 5751's was that for whatever reason, some of them would hum in V1 of my MAZ 38. I bought one from Mike at KCA and it hummed in my Mazerati. He told me to clean the contacts but it didn't make a bit of difference. It was a disappointing and kind of expensive little experiment with a 5751 to say the least.
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