That's a lovely picture!

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...

It’s not just a question of voltage but of the drive func. More voltage lends to more better dynamic range but not whole story. Gain/drive is where dynamics live. Too much gain and you have noise. Not enough and there is not life. Pre amps should give gain…. That all said every system is...

Just read this. Super kind guys. Thanks a bunch.

The Bigger Ben fully supports a 5U4, the EML is being used without issue.

Sorry for a late chime in but on I’m vacation currently. We don’t go into breakdown of how we load the output stage… That said, there’s lots of variables to be considered, pri impedance vs (selected output) sec impedance, tube choice and impedance of VC which is not constant. The Forge is...

That’s a really good looking setup.

Have a bad case of food poisoning so Im loopy, but... 15lbs lbs for the amps... 20-22lbs with case.

Wow that’s super cool looking.

sure will. Might need to buy from amazon if done find at home depot. 3A SB

A 12Bh7 will likely increase current and not gain. 12AX7 with give you most gain. If wanting to ekk out most power... 12AX7 and then some pre on the front would be the path forwards. The 12BH7 is fantastic choice but not for power.

Very welcome. Sorry I havnt been on in a few weeks. Have big stuff in process for CAF and Canjam. New Pre, RedOctober Rev 2 (Review units)... Huge speakers oh my... and some how I tripped and few onto being an executive director of a community rehab program that needed some additional support...

Dear god thats an amazing picture. !

Erik, I can appreciate your frustration with my prices. You may not understand the actual time spent building a Red October. They are extraordinarily time intensive. Regarding use of zip ties, we dont create a wire harness as you could not optimize/ have the shortest wire runs. The zip ties...

Cant wait for CanJam, think everyone has been planning for surprises and old friends alike.

The DCA are not efficient and do love power. Changing the front end tube from a 6sl7 to a 12AX7 via adapter (eBay) will also increase power. Thanks Justin

Not at all. It’s a Class A amp. It’s burning hot not matter the volume.

Yes I do in general terms.

Feel free to give me a call happy to walk you through some thoughts... The forge is a very very quite amp... Justin 949-636-9076

Those are some seriously amazing tubes. Im might have to dig out some prototype iron I made and do something special for canjam.

I think most single ended amps at large do well to have gain stage infront. It’s too hard to get enough voltage swing from a single stage and keep noise low. But when paired with a pre. It’s magic. Like peanut butter and jelly magic. You can do without. But would you want to. I make a pre...

The Rev2 is out but is a soft update. No new capabilities… reductions in noise floor etc. better test equipment allowing us to further optimize things. Preamp capabilities? My fav version is when ordered without a volume pot. Paired with a pre… so good.

Active.

Should be no issue. If using the apps, it's an 8ohm winding and stable to about 3ohms.

There are shields you can get. Give me a call as time allows. They are super cheap on eBay. That said… RFI sucks but we are in a wireless world now.