Welborne has a Borbely inspired hybrid line module with ECC86, and they say ECC88 works fine at these low voltage
I would like to combine SEWA with Aikido, but I guess it will be expencive with regulated supply and all
Broskie(TCJ) has shown a similar design, but I like SEWA better, maybe because Mads has learned from NelsonPass
I would like to combine SEWA with Aikido, but I guess it will be expencive with regulated supply and all
Broskie(TCJ) has shown a similar design, but I like SEWA better, maybe because Mads has learned from NelsonPass
for Planet10 to judge if he wants of course..
Re: Re: tube guys
* hears a shout to come play in the "sandbox" *
Good day gents!
I have been given some idea of what the need is here.
Yes, the MOSFETS need a little more current than the CCS or perhaps resistor loaded tube can handle? ECC88 is a good choice, since it likes current at low voltages. Must do some listening tests.
We want some reserve with some gain. I'll be cooking up some single tube circuits as well as a totem variety or two and post the results in here.
@ Ryssen - coupling cap?
planet10 said:
* hears a shout to come play in the "sandbox" *
Good day gents!
I have been given some idea of what the need is here.
Yes, the MOSFETS need a little more current than the CCS or perhaps resistor loaded tube can handle? ECC88 is a good choice, since it likes current at low voltages. Must do some listening tests.
We want some reserve with some gain. I'll be cooking up some single tube circuits as well as a totem variety or two and post the results in here.
@ Ryssen - coupling cap?
Re: Re: Re: tube guys
yo,mate
5mA through driver stage is enough for this Mistfet application (don't ask me how I know that )
speed is important,so I'll not try to torture 88 with sissy voltage;
been there.......
and-one eeny weeny additional xformer can't be xpensive
Geek said:
* hears a shout to come play in the "sandbox" *
Good day gents!
I have been given some idea of what the need is here.
Yes, the MOSFETS need a little more current than the CCS or perhaps resistor loaded tube can handle? ECC88 is a good choice, since it likes current at low voltages. Must do some listening tests.
We want some reserve with some gain. I'll be cooking up some single tube circuits as well as a totem variety or two and post the results in here.
@ Ryssen - coupling cap?
yo,mate
5mA through driver stage is enough for this Mistfet application (don't ask me how I know that
)speed is important,so I'll not try to torture 88 with sissy voltage;
been there.......
and-one eeny weeny additional xformer can't be xpensive
If you're going 6mA, you've opened up more options - trioded 6EJ7 for example. Gain the same as ECC88 and just as linear, if not more and easier to get
Sorry, I didn't realize at the time ECC86 was a space-charge tube. I thought 30V was a typo
The folks have mentioned 5mA is adequate for driving those plastic tubes, but the ECC86 specs show 0.9 mA as the average goings. Might fall flat without a CF or something.
Sorry, I didn't realize at the time ECC86 was a space-charge tube. I thought 30V was a typo
The folks have mentioned 5mA is adequate for driving those plastic tubes, but the ECC86 specs show 0.9 mA as the average goings. Might fall flat without a CF or something.
If i run the ECC86 at 15,5v/5mA will it work to drive the mosfets?That´s 0,08w the limit is 0,6w.And can I paralell the halves of one ECC86 to get 10mA?If this does not work and I use ECC86 as a voltamp and add a CF what tube should that be ECC88?I´d like not to have a to high volt as I have done a box for the amp with to 9 pin sockets not to much room for an extra trafo.Many clues,Geek give me hint..
Member
Joined 2002
Ryssen said:
If you can get it that high at that V, great! Let us know
(I've had many ask about this and I couldn't answer them)
I experimented with many tubes as LV CF's and was disappointed. But I did not try an ECC88, so I say try it.
Miles Prower has had success with another MOSFET as the follower (OK, I said CF... whazza fet-follower called?) to drive a power stage. That way you could keep your DC coupling