Lab Rat build!

[vigilante398]

I’m still super excited about this one. It’s cool to see people getting theirs. Mine still taking a long way tour around Illinois . I’m not usually a mojo gal, but this one has a metal can LM301 waiting for it. And I plan to do three-way clipping with an on off on.

I'm also not usually one for mojo parts, but my personal Lab Rat has a metal can LM308AH in it I was torn between that and the УД1408 my buddy sent me since they both sounded excellent, but looks won out and the metal can went in.

 

[vigilante398]

We'll see, you've got me thinking an on-off-on could be dandy too.

I don't think I designed this for on-off-on, but it's certainly doable and certainly a cool sound. So if you try it and it works for like a minute then the signal fades out and disappears, put a 100k resistor between the middle lug of the toggle switch and ground, that will take care of it.

 

[drgonzo1969]

will this lm301 from mouser work?

https://www.mouser.com/ProductDetail/Texas-Instruments/LM301AH-NOPB?qs=X1J7HmVL2ZGmBxYIZrEViA%3D%3D&mgh=1&gclid=CjwKCAjwqZSlBhBwEiwAfoZUIOPQkzmUBy0qs4VWzeARHs53911YKZrCEs8xb1qBV0YiTOwX24ENvRoCc38QAvD_BwE

 

[vigilante398]

will this lm301 from mouser work?

https://www.mouser.com/ProductDetail/Texas-Instruments/LM301AH-NOPB?qs=X1J7HmVL2ZGmBxYIZrEViA%3D%3D&mgh=1&gclid=CjwKCAjwqZSlBhBwEiwAfoZUIOPQkzmUBy0qs4VWzeARHs53911YKZrCEs8xb1qBV0YiTOwX24ENvRoCc38QAvD_BwE

Looks like it would, yup.

 

[Betty Wont]

will this lm301 from mouser work?

https://www.mouser.com/ProductDetail/Texas-Instruments/LM301AH-NOPB?qs=X1J7HmVL2ZGmBxYIZrEViA%3D%3D&mgh=1&gclid=CjwKCAjwqZSlBhBwEiwAfoZUIOPQkzmUBy0qs4VWzeARHs53911YKZrCEs8xb1qBV0YiTOwX24ENvRoCc38QAvD_BwE

https://www.amplifiedparts.com/products/op-amp-as301ah-alfa-single-to5-8-case

Cheaper here.

 

[drgonzo1969]

https://www.amplifiedparts.com/products/op-amp-as301ah-alfa-single-to5-8-case

Cheaper here.

hell yes! good lookin out!

 

[drgonzo1969]

anybody got any other mojo parts going in? this is good stuff

 

[derevaun]

anybody got any other mojo parts going in? this is good stuff

I wouldn't call it mojo, but I did get a few of these in the mail today. УД1408A, apparently the Soviet analog of the LM308. I haven't stuck it in a Rat yet, but it seems like a fun alternative.

 

[drgonzo1969]

I wouldn't call it mojo, but I did get a few of these in the mail today. УД1408A, apparently the Soviet analog of the LM308. I haven't stuck it in a Rat yet, but it seems like a fun alternative.

View attachment 51875

juicy! im curious about those too. where did you source yours?

 

[derevaun]

juicy! im curious about those too. where did you source yours?

I got them from alexer1 on Ebay. They show as "out of stock" now, but it wouldn't hurt to ask them or any other UA seller.

 

[drgonzo1969]

would it be worth it to pay an extra dollar for tube sockets with gold contacts? because mojo and because gold?

 

[Silver Blues]

The ones I've got are gold-plated, so I'd say yes

 

[drgonzo1969]

Progress so far… I populated all the stuff I had on hand. I put sockets in for the clipping diodes.

 

[jimilee]

Imma need one soon. My discretionary spending has slowed down for now.

 

[Betty Wont]

anybody got any other mojo parts going in? this is good stuff

Not mojo exactly, but I’ll be using infrared LEDs for that clipping option. In most circuits that use red LEDs for clipping I prefer IR. They have a slightly lower fv (the lowest of standard LEDs) than red. Squeezes out a bit more distortion at the sacrifice of volume but keeps the LED flavor. Its my favorite Turbo Rat “mod”.

 

[drgonzo1969]

Nice! I plan on giving IR LEDs a try as well. i've never tried them before.

 

[drgonzo1969]

not exactly mojo either but I am going to try and squeeze these silicon tube dampers in there for a little protection. I dropped my Sushi Box Black Eye the other day and when it fell, I clenched so hard I almost turned doo doo into diamonds. The Black Eye was fine tho.

https://www.amplifiedparts.com/products/damper-rings-high-temperature-silicone-red

 

[Betty Wont]

not exactly mojo either but I am going to try and squeeze these silicon tube dampers in there for a little protection. I dropped my Sushi Box Black Eye the other day and when it fell, I clenched so hard I almost turned doo doo into diamonds. The Black Eye was fine tho.

https://www.amplifiedparts.com/products/damper-rings-high-temperature-silicone-red

I use silicon damper rings as bumpers on all of my sushi box builds but those are too thick to fit. You need ones about half the diameter to make it.

 

[vigilante398]

I dropped my Sushi Box Black Eye the other day and when it fell, I clenched so hard I almost turned doo doo into diamonds. The Black Eye was fine tho.

And that is reason #1 I choose to mount the tubes inside the enclosure. I can't promise they'll be fine 100% of the time, but I have never had or heard of anyone having a broken tube from dropping one of my pedals. Silicon rings are never a bad idea and if you can make them fit I wholeheartedly support the idea, but I've never felt like it was essential for the protection of the tube.

 

[drgonzo1969]

I use silicon damper rings as bumpers on all of my sushi box builds but those are too thick to fit. You need ones about half the diameter to make it. View attachment 51946

Thanks for the heads up