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October 17, 2021, 11:03:52 AM

Author Topic: Tube Rolling w/Crack  (Read 570560 times)

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Offline luczamic

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Re: Tube Rolling w/Crack
« Reply #2385 on: October 03, 2021, 11:50:45 AM »
I don’t Paul, I’ve already ordered the one you’re liked.

Thank you for that!

Offline monsterdonkey

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Re: Tube Rolling w/Crack
« Reply #2386 on: October 04, 2021, 07:27:08 PM »
Tube rolling can be fun and costly and all that, but as the differences can be quite subtle (I’ve found I like tubes I thought I didn’t like on different days) why not try adjusting the tone controls or equalizer on your source machine and see if you can get it closer to your preference that way?

Offline Souldriver

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Re: Tube Rolling w/Crack
« Reply #2387 on: October 12, 2021, 09:03:03 AM »
Hey all, i finished my kit a few weeks ago and am looking to roll around. I want to start with some of the tubes i yave left over from my guitar days and when searching i came across this guy.

A JAN Philips 5751

Since this is a 12ax7 type normally i would try, but here is an interesting thing about it:
The 5751 is not a true 12AX7, but is often used in place of a 12AX7. They should have approximately 70% of the gain of a 12AX7, and are often used to quiet down guitar amps that have too much gain. If you have gain to spare using a 5751 tube will greatly improve your overall tone without making your preamp excessively clean.

With this said, is this something that can be safe on a BHC + SB or is it still going to be too much?

Thanks for the help!

Online Paul Joppa

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Re: Tube Rolling w/Crack
« Reply #2388 on: October 12, 2021, 09:32:50 AM »
The 5751 requires a much higher plate voltage than is available in the Crack.
Paul Joppa

Online Paul Birkeland

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Re: Tube Rolling w/Crack
« Reply #2389 on: October 12, 2021, 09:46:30 AM »
Other than the plate voltage problem, more gain in the Crack is not something considered desirable.
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Souldriver

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Re: Tube Rolling w/Crack
« Reply #2390 on: October 12, 2021, 10:21:42 AM »
Thanks for confirming guys, I figured the lower gain 5751 would still be too far off.

I bought a few of these for $15-20 a piece and now they are much rarer. I most likely will sell them and grab what i need.