[2359glenn]

Even though The 5998 will work in a amp made for 6AS7s it can handle more power and sound better then a 6AS7
But the bias resistor has to be changed to do this. The switch I added on the back of your amp does this.
The 5998 can handle even more power but it's filament draws a brutal 5 amps of current. Most amps
cannot handle the 10 amps two of these tubes will draw off the power transformer. But the transformer in
this amp can handle this current.

 

[jc9394]

I need some education about the differences in the 6as7, 5998 and the 6336. I have
not used an amp that uses these tubes. thanks

You get the OTL? Same as mines, I love the GZ34, CV1988, and GEC 6080 for the HD800. The 6336 are better for LCDs while both 6080 and 6AS7G are better for high impedance phones. I have not tried the 5998 yet because I'm loving the GEC 6080 (can have for $100-150/pair).

 

[jc9394]

Even though The 5998 will work in a amp made for 6AS7s it can handle more power and sound better then a 6AS7
But the bias resistor has to be changed to do this. The switch I added on the back of your amp does this.
The 5998 can handle even more power but it's filament draws a brutal 5 amps of current. Most amps
cannot handle the 10 amps two of these tubes will draw off the power transformer. But the transformer in
this amp can handle this current.

I don't have a switch on my amp but I tried the 7236 it works fine. Should I not use 7236/5998?

 

[2359glenn]

You get the OTL? Same as mines, I love the GZ34, CV1988, and GEC 6080 for the HD800. The 6336 are better for LCDs while both 6080 and 6AS7G are better for high impedance phones. I have not tried the 5998 yet because I'm loving the GEC 6080 (can have for $100-150/pair).

It is the same but has a switch for the proper bias for the 5998

 

[2359glenn]

I don't have a switch on my amp but I tried the 7236 it works fine. Should I not use 7236/5998?

It is fine to use it it will not be optimized it's bias current will be lower then it would be with the switch.
so it won't sound as good as it could but last longer.

 

[jc9394]

It is fine to use it it will not be optimized it's bias current will be lower then it would be with the switch.
so it won't sound as good as it could but last longer.

That is ok, I love the 6080. Anyone need a Sylvania 7236?

 

[2359glenn]

That is ok, I love the 6080. Anyone need a Sylvania 7236?

I don't like how the 7236 sounds in that amp.

 

[longbowbbs]

Happy Birthday Clayton! I had to post that on page 596 of this forum! 

 

[Clayton SF]

Thanks to all for your birthday wishes.
Now I got cake and yes I do have room for Veuve Clicquot--family portrait.
 
There was a box in front of my apartment when I got home from work.
Thanks to whoever was responsible for this sweet concoction.
I hope that it was meant for me!
 
I've never heard of a rosemary cake.

 

[GrindingThud]

Is that a teeny weeny pear?

 

[rnadell]

  Even though The 5998 will work in a amp made for 6AS7s it can handle more power and sound better then a 6AS7
But the bias resistor has to be changed to do this. The switch I added on the back of your amp does this.
The 5998 can handle even more power but it's filament draws a brutal 5 amps of current. Most amps
cannot handle the 10 amps two of these tubes will draw off the power transformer. But the transformer in
this amp can handle this current.

 
 

You get the OTL? Same as mines, I love the GZ34, CV1988, and GEC 6080 for the HD800. The 6336 are better for LCDs while both 6080 and 6AS7G are better for high impedance phones. I have not tried the 5998 yet because I'm loving the GEC 6080 (can have for $100-150/pair).

Thanks for the info, looking forward to a first hand experience. Do you know if the amp will handle the he500's?

 

[Clayton SF]

Is that a teeny weeny pear?

I think it is a teen weeny marzipan pear. I haven't tasted it yet but that's what I suspect it is.

 

[GrindingThud]

My food horizon just expanded.

 

[rosgr63]

Nice cake Clayton!
You can get some glazed pears too, they taste great.
 
You can chop glazed fruit and put it inside the cake before you bake it.

 

[Silent One]

  Happy Birthday Clayton! I had to post that on page 596 of this forum! 

 Yup, The Mighty 596 page...