[Ricey20]

Hmm I do like warm but I find the 6BL7 a tad too laid back with mids in some of my music on my K340s. Is there a tube combination that sounds warm and smooth like the 6BL7 but a little more forward?

 

[sacd lover]

Quote:

Originally Posted by Ricey20 /img/forum/go_quote.gif Hmm I do like warm but I find the 6BL7 a tad too laid back with mids in some of my music on my K340s. Is there a tube combination that sounds warm and smooth like the 6BL7 but a little more forward?

Try a 6414; preferably a black plate tube with the 6bl7gta. If you have a 2c51 adapter ... the 2c51 > 6bl7gta combo is great with low impedance headphones.

The 7n7 > 5687 combo is very good.

 

[Ricey20]

thanks for all the suggestions and thanks sacd_lover! I just tried the 6414s with the 6bl7GTAs, WOW. I should have tried this combo long ago lol. Its more forward and detailed but still has this certain smoothness to it, I love it. I need to get a 2c51 adapter one of these days. I did try the 7n7 + 5687 and it was punchier than with the 6BL7s but didn't have the the warm/smoothness that I wanted.

For now the 6414 + 6BL7 is a keeper. I lucked out as both 6414s that were included are black plate Raytheons

One last thing, is it worth getting tube dampeners? Do the 6414s and 6BL7s benefit from having them?

 

[Frihed89]

What's the price difference these days between a MPX3 Slam SE and a standard Supra? I know everyone is very keen on point-point wiring, but the printed circuit board and neat layout of the MPX3 also has benefits for ease of running down technical problems (by anyone) and DIY modding.

 

[tagosaku]

I thought I read that Point to Point was easier to trouble shoot!?

 

[Ricey20]

Point to Point is not easy to troubleshoot when its very unorganized and all over the place. Not sure how organized most Supras are.

 

[skyline889]

Does anyone know of someone who can repair MPX3s other than Mikhail? My MPX3 has sat unused for over a year now because of a hum in one of the channels but I've heard that Mikhail's backlog for repairs is over a year in and of itself!

 

[sacd lover]

Quote:

Originally Posted by skyline889 /img/forum/go_quote.gif Does anyone know of someone who can repair MPX3s other than Mikhail? My MPX3 has sat unused for over a year now because of a hum in one of the channels but I've heard that Mikhail's backlog for repairs is over a year in and of itself!

Have you done any troubleshooting to be sure the hum is the amp and not a bad tube, ground lop etc.... ??

 

[tagosaku]

Quote:

Originally Posted by skyline889 /img/forum/go_quote.gif Does anyone know of someone who can repair MPX3s other than Mikhail? My MPX3 has sat unused for over a year now because of a hum in one of the channels but I've heard that Mikhail's backlog for repairs is over a year in and of itself!

I remember nikongod posting about studying MPX circuit, but can't find that post. You might want to ask his help.

 

[Frihed89]

I think that's over on a DIY post I started about the MPX3 power supply. I haven't followed up on this because I have been working on modding a small tube power amp i own (my first such project) before I tackle my MPX3. My experience on that project is that most DIYers can size up a circuit just by looking at a photo and if they can touch it, you'll get even more help! The MPX3 is a clean design. Everything is out in the open. Find a tube tech where you live and by all means contact nikongod and other DIYers who own SP stuff. Local DIYers are really a great resource, too, if you can find them. I still don't know a thing about electricity, but I am getting good at replacing and bypassing capacitors, changing resistors, and next a choke

 

[skyline889]

Yeah I'm sure it's not the tubes. I have two sets and no matter which set I use, the buzz is the same. The amp was shook up during shipping (SPST switch broke etc) so I haven't used it much since.

 

[jeffreyj900]

Might be a good idea to pop it open and post some internal pics in a new thread?

 

[sacd lover]

Quote:

Originally Posted by skyline889 /img/forum/go_quote.gif Yeah I'm sure it's not the tubes. I have two sets and no matter which set I use, the buzz is the same. The amp was shook up during shipping (SPST switch broke etc) so I haven't used it much since.

No wonder the amp has a hum .... who knows what was torn loose internally. Did you file a claim with the courier?

 

[skyline889]

I'm not sure. I bought the amp from Grawk and I don't remember exactly but I don't think think the he was able to put through the claim and I didn't want him to have to eat the damages so I just stored it in the hopes that I'd be able to fix it. Sadly, there weren't any repair shops back in Hawaii but now that I'm up in Oregon, I can bring it back up with me in October and find a repair shop up here.

 

[Happy Camper]

Quote:

Originally Posted by skyline889 /img/forum/go_quote.gif I'm not sure. I bought the amp from Grawk and I don't remember exactly but I don't think think the he was able to put through the claim and I didn't want him to have to eat the damages so I just stored it in the hopes that I'd be able to fix it. Sadly, there weren't any repair shops back in Hawaii but now that I'm up in Oregon, I can bring it back up with me in October and find a repair shop up here.

Go to a tv/radio repair that has a tube tech. With so many retired military, there should be tons of tube experience on the rock.