[Hansotek]

Hans I worry for you. Your life will be changed now.

Oh, it’s WAAAAY to late for me man.

 

[attmci]

I have a new set of Stanley screw drivers. I'm all ready to learn.

First lesson would be to change the USB 5 board for Yggdrasil early next year. There's a lot of screws in that box !!!

Really? You believe the high-end 6as7g tubes beat 6bx7 / 6bl7 ? Right after I've invested in twenty-four 6B*7 tubes??? Are you trying to lower the worth of my investment?

The only tool missing is a powerful enough hammer. LOL

Plus some "supreme" caps.

 

[UntilThen]

Oh, it’s WAAAAY to late for me man.

There is a cool looking driver that you can use too. It's the FDD20. A nice blue looking tube. Need to get the FDD20 to 12SN7 adapter.

 

[UntilThen]

Hi 2359glenn,

Way back I remember that you said that the 6 pack 6BL7/6BX7 sounded better than any 6AS7 type tube in your amp. Have the new models changed that?

Mordy, nothing has changed. It's attmci plan not to highlight the 6BL7 too much otherwise the price will skyrocket.

 

[UntilThen]

Oh wait... your amp does not have the 6, 12 and 25v switch for the different drivers. Need Glenn to chime in here.

 

[gibosi]

There is a cool looking driver that you can use too. It's the FDD20. A nice blue looking tube. Need to get the FDD20 to 12SN7 adapter.

The FDD20 requires the 6/12/25 heater switch. Or an external 12 volt heater power supply. But if one is going to go down that road, then 2.5 volt Arcturus 127 triodes are even cooler:

 

[UntilThen]

But if one is going to go down that road, then 2.5 volt Arcturus 127 triodes are even cooler:

That's so cool. 2.5v so can I set the switch to 6.3 volt for it? Also there are no known adapters for it.

 

[whirlwind]

I comparing the 5998 and 6BL7 i was close. With the HD-800s 300 ohm phones the 6BL7 seemed a little better
but a close call. With the price difference the 6BL7 wins I just bought 6BL7s for $4 so $24 for 6 of them is a bargain
compared to over priced 5998s.
I didn't try with low impedance phones no time have to put the bottom on Matt's amp to box it up tomorrow.
The only reason to use 5998s would be to put 4 of them in to drive certain low impedance phones.
But I would try with one pair first not to burn 4 expensive tubes if not needed.
And the better option would to use two 6336 with low impedance phones but the 5998 sound better I think.
After listening to different tubes all day who knows what sounds better at this point.

I thought the 5998 sounded better than 6336 tubes also, I use 5998 and C3g to power my planars, I like the tone better.
I use only two because of exactly what you said, why burn four at a time when it is overkill.

The 6BL7 and 6BX7 are no doubt the king for the bang for your buck...very reasonably priced for what you get.

Ken & Arnold may have tried all of these combos

 

[whirlwind]

Many thanks! I thought you needed a special switch to bias 5998 and 6336? Perhaps I misunderstood about the 5998.

I saw the comments about 6BL7 and 6BX7s above, so I was definitely curious about those. I love the GEC 6080s - really nice staging and transparency, just wondering what else is out there after being blown away by a $10 RCA 5U4GB recently. Got me curious about other budget gems!

I love the sound of those GEC 6080 tubes also...very nice.

Not sure if your amp has the 6/12/25 volt switch for driver tubes...if it does you can buy 25 volt SN7 tubes.
A 1633 RCA smoke glass, which is a 25SN7 tube, sound great and can be had for about $4 each.

That is a beautiful amp, I remember when you snagged this on the B/S/T forum

gibosi has tried so many tubes in his amp, it is actually pretty hard to imagine, lol.

 

[2359glenn]

That's so cool. 2.5v so can I set the switch to 6.3 volt for it? Also there are no known adapters for it.

No you will need a 2.5 volt power supply.
Maybe I should add 2.5 on the switch and 5 pin sockets? That would make the chassis have to be bigger.

 

[2359glenn]

And with a adapter you can use two EL3N tubes in the 6SN7 socket.
And don't forget the 7N7 with a adapter.

 

[2359glenn]

OH and there is a adapter avilable to use the 76 tube it is a 6.3 volt tube.
Not sure if you can get Arcturus blue ones though.

 

[Rossliew]

This is getting outta hand LOL

 

[Hansotek]

And with a adapter you can use two EL3N tubes in the 6SN7 socket.
And don't forget the 7N7 with a adapter.

Oh, that sounds interesting. My interest in the EL3N tubes is piqued after all the positive stuff I’ve read on your EL3N amp.

 

[2359glenn]

Here is the adapter needed

https://www.ebay.com/itm/1pc-Gold-D...639044?hash=item2ca65c7884:g:-W4AAOSw5IJWggQB