[Quadfather]

Looks amazing Nice set up you got there

Thanks. I am glad I took the OTL plunge.

 

[Tom-s]

When flat on a surface, for a Crack without feet, ventilation for its internals is minimal.
Especially when tube rolling there's more thermal stress on some components compared to stock.
From my own experience, sufficient airflow becomes more important the more crowded you get your Crack from various mods.
To have lots of fun with your Crack for a long time, it might be a good idea to get it on feet.
Let it breathe, and enjoy it!

 

[attmci]

You are most kind Bloodhawk, if you ever want to add patina to copper I can teach you that pretty easily. The process takes 24 hours or less but actual work time might be ten minutes or less. Here is a lighter blue patina I added to another copper plate. You can go more towards dark blue or green depending on the salt and liquid combination.

Be careful of playing with copper. You may generate toxic materials.

 

[Paladin79]

That is one of the reasons I offered to teach.

I either do this outdoors or in a shed on the back of my property in the winter. If I ever have questions I turn to my daughter-in-law. Her PhD is in chemistry. I am also used to dealing with ROHS compliance, etc.; even when soldering with 60/40 solder I warn employees that lead is a cumulative poison.

 

[attmci]

That is one of the reasons I offered to teach.

I either do this outdoors or in a shed on the back of my property in the winter. If I ever have questions I turn to my daughter-in-law. Her PhD is in chemistry. I am also used to dealing with ROHS compliance, etc.; even when soldering with 60/40 solder I warn employees that lead is a cumulative poison.

Thanks for the comments. It's so beautiful.

 

[Quadfather]

I really do not understand tubes and electronics. I have had more listening time on this tube amp with the new Tung Sol 5998 and Mullard CV4003 tubes, and all of the sudden the bass is starting to really slam hard and go way lower. I like it.

 

[attmci]

I really do not understand tubes and electronics. I have had more listening time on this tube amp with the new Tung Sol 5998 and Mullard CV4003 tubes, and all of the sudden the bass is starting to really slam hard and go way lower. I like it.

You words worth much more than other expert's on this forum.

Congratulations!

 

[Quadfather]

You words worth much more than other expert's on this forum.

Congratulations!

Thank you. One thing I never do on here, is pretend to be an expert. When I do not understand something or how it works, I am the first to admit it. I also realize everybody hears differently, so I never criticize others for their opinions of equipment. This is the most rewarding hobby I've ever been a part of.

 

[Rhamnetin]

I really do not understand tubes and electronics. I have had more listening time on this tube amp with the new Tung Sol 5998 and Mullard CV4003 tubes, and all of the sudden the bass is starting to really slam hard and go way lower. I like it.

Very nice. I plan to compare the Mullard CV4003 to the Amperex Bugle Boy in this amp. Won't bother with anything else and the only power tube I will be using is a NOS Tung Sol 5998.

 

[Quadfather]

Very nice. I plan to compare the Mullard CV4003 to the Amperex Bugle Boy in this amp. Won't bother with anything else and the only power tube I will be using is a NOS Tung Sol 5998.

Be sure to let us know. Cheers

 

[Mightygrey]

I really do not understand tubes and electronics. I have had more listening time on this tube amp with the new Tung Sol 5998 and Mullard CV4003 tubes, and all of the sudden the bass is starting to really slam hard and go way lower. I like it.

I finally bit the bullet and got myself a Tung Sol 5998 tube, paired with a Sylvania 6SN7 input tube. I should have gotten it months ago - the dynamics have certainly changed for the better - it's also dead-silent now compared to the noisy RCA 6AS7G's I took a punt on via eBay a while ago. It's perfection.

For science, I also tried using my Crack as a pre-amp with my two-channel power amp. I used a 6.3mm adapter to 2 x RCA, and fed the signal to the line-level inputs on my 250 WPC power amp. It was incredible.

 

[Paladin79]

I have used the Crack as a preamp as well with great results. I went so far as to install RCA outputs in a couple Cracks I built just for that purpose.

 

[Mightygrey]

I have used the Crack as a preamp as well with great results. I went so far as to install RCA outputs in a couple Cracks I built just for that purpose.

I'm not electrically-minded enough to understand the impact (if any?) that the Crack's relatively high output impedance may have on performance downstream when using as a pre-amp - is there anything to be mindful of?

 

[Mightygrey]

I have used the Crack as a preamp as well with great results. I went so far as to install RCA outputs in a couple Cracks I built just for that purpose.

Would that just involve linking the L/R wiring upstream from the headphone-out + a shared ground to 2 x RCA outputs? Do any resistors need to be added?

 

[Paladin79]

I have not added resistors and the rca females I used are just in parallel with the standard jack so it is similar to what someone else said about plugging in a quarter inch to dual rca's.