, when they were driven @ 8ohms?
Hi,
Well, the Philips AG9015 (which is what I had) does give you two options, either capacitor out to 800 Ohm speaker (their own model) or you couple through a small xformer into a 8 or 16 Ohm speaker.
That's how I listened to it.
While it sounded surprising powerful in the bass department, it did sound rather errr...old fashioned.
What I'm trying to tell you is that it's a nice idea for a highimpedance headphone, other than that you'll still need a OPT.
I've suggested a White CF before but even that won't reach down to a Zout below 8 Ohm with a pair of EL86s.
Cheers,
Well, the Philips AG9015 (which is what I had) does give you two options, either capacitor out to 800 Ohm speaker (their own model) or you couple through a small xformer into a 8 or 16 Ohm speaker.
That's how I listened to it.
While it sounded surprising powerful in the bass department, it did sound rather errr...old fashioned.
What I'm trying to tell you is that it's a nice idea for a highimpedance headphone, other than that you'll still need a OPT.
I've suggested a White CF before but even that won't reach down to a Zout below 8 Ohm with a pair of EL86s.
Cheers,
I think that, that's true too, Fred.fdegrove said:
However, I've had a recent expereience of swapping tube brands in a 6CG7 and 12AX7 line-stage + cathode follower.
I was suprised that the 'sonic flavors' of these tube tubes that I'd previously observed in a simple line-stage circuit, also seemed to be reflected (admittedly to a lesser extent) when used in a cathode follower position too. (ie if it was a Mullard 12AX7 then the "Mullard mid-range" followed it into the cathode follower circuit position as well. Dittio for the 6CG7 types I tried). So there seems to still be something inherent about the tubes' themselves, in addition to the (major) contribution of the surrounding circuit.
This kinda bothered me, since I have a burgeoning preamp design which was going to employ a CF and I was hoping to be able to use a 'non-audiophile' caliber tube in this position. Now, I'll have to rethink this...
Is my tube 'stash' that transparent!?!!?
I think I can count my good 6DJ8's on one hand, at the moment... 
Thanks for your interesting suggestion, Fred. I'll definately look into that one a little further.
Any comments or opinions about it's approximate sound quality vis-a-vie the ECC88 family?
SY said:
Hmmm, I wonder which of the two of you has been more insulted, Fred or Frank.
Well I'm not sure that any insult was intended to anyone from my end; so, I'm definately not clear on whom I'm supposed to be backhanding! (...But if whatever it was happens to be astoundingly super-witty, then I claim full responisibility
)
Hi,
Certainly, different brands, slightly different parameters and different materials would make for a perceived audible difference even from different batches form the same manufacturer.
Why, it's just another SRPP circuit so it's already OUT of fashion...probably not old enough.
We all know Fred won't comment on that...
Most of those belong to the same folded anode family and were design for VHF use as cascode stages.
I quite like them as they have very good electrical properties and often are very low noise....
Depending on how and where you'd use them, I think you can make very good sounding circuits with them.
Cheers,
Certainly, different brands, slightly different parameters and different materials would make for a perceived audible difference even from different batches form the same manufacturer.
Why, it's just another SRPP circuit so it's already OUT of fashion...probably not old enough.
We all know Fred won't comment on that...
Most of those belong to the same folded anode family and were design for VHF use as cascode stages.
I quite like them as they have very good electrical properties and often are very low noise....
Depending on how and where you'd use them, I think you can make very good sounding circuits with them.
Cheers,
EC88 data sheet
ECC88 (aka 6DJ8) data sheet
Read them and you will see that kevinkr speaks the truth.
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ECC88 (aka 6DJ8) data sheet
Read them and you will see that kevinkr speaks the truth.
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