[shwnwllms]

First time posting here, but I've been happily living with my Bigger Ben rev2 for quite some time. I've been rolling a decent amount of tubes but wanted to see if anyone had experience running EL37 power tubes? I wanted to try them in my BB but thought better of just dropping them in without trying to see if anyone else has done so before me. Should be equivalent to KT66 tubes in the limited research I've done, but anyone else have any insight or impressions?

I don’t see any mention of them here but plenty of other amps are using EL37s in place of EL34s

I would check with @ampsandsound just to be sure (email is probably best)

Here are the two data sheets showing slightly different specs.

https://frank.pocnet.net/sheets/129/e/EL34.pdf

https://frank.pocnet.net/sheets/129/e/EL37.pdf

Here’s the KT66 as well

https://frank.pocnet.net/sheets/126/k/KT66.pdf

 

[Solleks]

I don’t see any mention of them here but plenty of other amps are using EL37s in place of EL34s

I would check with @ampsandsound just to be sure (email is probably best)

Here are the two data sheets showing slightly different specs.

https://frank.pocnet.net/sheets/129/e/EL34.pdf

https://frank.pocnet.net/sheets/129/e/EL37.pdf

Here’s the KT66 as well

https://frank.pocnet.net/sheets/126/k/KT66.pdf

Thanks for the resources! I'll also send a note to Justin to confirm and I will follow up here for everyone's awareness once I get an answer

 

[ampsandsound]

El37s are pin compatible but it's almost like a 6L6GB but as a pentode.
Its Max plate is 400v for which the Bigger Ben/Mogwai SE and Nautilus exceeds.
Use at your own risk!

It's very similar to 807s with an adapter. Mil Spec 807s handle the voltage without issue... but not all NOS 807s are mil spec and Mogwais' have killed more than a few.

I didn't reply the the email as I hope this was a better forum. It took a few days to get a decisive answer.... I know for sure it's an unwise choice.

 

[Solleks]

El37s are pin compatible but it's almost like a 6L6GB but as a pentode.
Its Max plate is 400v for which the Bigger Ben/Mogwai SE and Nautilus exceeds.
Use at your own risk!

It's very similar to 807s with an adapter. Mil Spec 807s handle the voltage without issue... but not all NOS 807s are mil spec and Mogwais' have killed more than a few.

I didn't reply the the email as I hope this was a better forum. It took a few days to get a decisive answer.... I know for sure it's an unwise choice.

Thank you for such a thorough answer on this, glad I checked!

 

[tholt]

Happy new owner of a lightly used Mogwai SE Rev 2. This will be my fourth A&S amp, starting with a very OG SE-84, then Mogwai SE Rev 1, Pendant SE and now the Mogwai Rev 2. I've had many amps in between those but I keep coming back to the iconic look and great sound of Justin's amps. Plus, they've all been rock solid and take well to tube rolling. Super happy to have a Mogwai again, and now onto the tube hunt...

 

[smodtactical]

Happy new owner of a lightly used Mogwai SE Rev 2. This will be my fourth A&S amp, starting with a very OG SE-84, then Mogwai SE Rev 1, Pendant SE and now the Mogwai Rev 2. I've had many amps in between those but I keep coming back to the iconic look and great sound of Justin's amps. Plus, they've all been rock solid and take well to tube rolling. Super happy to have a Mogwai again, and now onto the tube hunt...

Hows it noise wise? Also any thoughts on going to bigger ben, agartha, red october etc?

 

[tholt]

Hows it noise wise? Also any thoughts on going to bigger ben, agartha, red october etc?

I don't hear any noise at all, but I've primarily only used the Sol P on the 8 ohm tap. Nothing more sensitive than that. But I understand the Rev 2 versions are made to be quieter. It's definitely been that so far.

Yeah, definitely have thought about getting a BB or Nautilus, maybe someday. Mogwai sounds great though

 

[ampsandsound]

That's a lovely picture!

 

[Bassic Needs]

Happy new owner of a lightly used Mogwai SE Rev 2. This will be my fourth A&S amp, starting with a very OG SE-84, then Mogwai SE Rev 1, Pendant SE and now the Mogwai Rev 2. I've had many amps in between those but I keep coming back to the iconic look and great sound of Justin's amps. Plus, they've all been rock solid and take well to tube rolling. Super happy to have a Mogwai again, and now onto the tube hunt...

How does the Pendant SE compare to the Mogwai?

 

[tholt]

How does the Pendant SE compare to the Mogwai?

I was surprised to find how well the Pendant SE sounded vs the Mogwai. Granted, I had a pretty top tier set of tubes for the Pendant (GEC U709, Telefunken G73R, 1954 closed getter Valvo EL84) but it was absolutely no slouch. I still think the Pendant is a helluva tube amp and one of the best deals in tube amps.

The Mogwai is the bigger sounding amp though -- fuller, richer, deeper bass. It's definitely the 'bigger brother' to the Pendant. That was my biggest takeaway of the two. I don't have the best tubes for the Mogwai, however. I was able to use the G73R but everything else was stock. I have a nice pair of TS 6550 grey plates and a GEC U52 rectifier coming my way, and will look forward to how those sound. Unfortunately I just sold the Pendant, so won't be able to compare them using the better tubes.

 

[shwnwllms]

One of the last photos I took of my Agartha before packing it up for the move back to SOCAL.

(I can’t wait for the movers to ask me what’s in the giant Pelican Case)

 

[theveterans]

You’ll sell your Agartha to them so you can get the Red October XL edition

 

[shwnwllms]

You’ll sell your Agartha to them so you can get the Red October XL edition

I’m in Pittsburgh, I’d put money on it that the movers will assume they are firearms (which they would probably be more interested in purchasing from me than a 300B tube amp)

The FedEx driver who delivered it nearly threw his back out getting it out of his truck. When he caught his breath he asked if “I was military or sumthin”

 

[tholt]

When he caught his breath he asked if “I was military or sumthin”

Packing HEAT... in the form of tubes and transformers

 

[tholt]

Quick question -- is the A2900 tube compatible with a Mogwai SE Rev 2? I read that it's not an exact equivalent of a 12AT7 but it will work in certain circuits.