The heater current of the 7802 is the same as a 6080. Gain is not really a determining factor for tube substitution in this position.
Doc B. said:If I can throw just a little sanity in here -
1) There is no universal best
2) Your best probably isn't my best
3) Price has nothing to do with whether you will like a tube or not. The only person who will always find the most expensive component to sound best simply substitutes a need to show off for having an ear. "Only" is a little misleading here, there are very many of these people. Just go to CES to see large flocks of them.
When the urge to buy the flavor of the week boutique item next strikes my suggestion is to stand back and look at why you decided to DIY. Wasn't it to learn enough to control yourself how your system sounds? Buy a bunch of cheap tubes and learn what kind of differences you can hear. Then form a judgment about what you like and don't care for, and focus your effort on getting there. Try other changes too, and see how much impact they have relative to tube changes. There might be other things that make a lot more difference. Unfortunately this doesn't apply to cans, but I think most of our customers would be better served by learning how to make their listening room sound better than by buying a new boutique capacitor. I also see a lot of guys with expensive headphones and rather mediocre sources. One needs to learn to balance all of these things rather than obsess about one.
They are close enough that you can plug one in and see.cddc said:Very interesting...can 6BX7/6BL7 output tubes be used in Crack (w/ Speedball)?
That is incorrect.cddc said:BTW, I read somewhere on head-fi that only 6080/6AS7G family tubes are suitable for OTL design due to their low output impedance.
No, a pair of 300Bs would have twice the output impedance (roughly) compared to a 6080 or other similar tube.cddc said:How about 300B tubes in OTL, they should also have low output impedance (can't remember where I read 300B's impedance) ?
If one puts feedback around a circuit, a tube like a 6SN7 can be made to work properly.cddc said:Cool....it seems lots of different tubes can be used in OTL. I guess LD3 OTL uses 6SN7 as power tube, although I think 6SN7 is not so powerful as 6080.
300Bs in the Crack circuit would be a poorer choice to drive power hungry headphones, especially low impedance ones.cddc said:I like more power. If possible, I'd really like to stick a 300B into my Crack w/speedball...lol ;D so that I can try these power hungry bad guys like K1000 or planars. 8)
Paul Birkeland said:I've never bought anything from them. A custom order like that which isn't handled by a website shopping cart will take a little extra time, I would encourage patience.
Those are the real deal.Jamwagon said:https://www.ebay.com/itm/Mullard-ECC802S-M8136-12AU7WA-ECC82-box-plate-small-shield-UK-made-TUBE-VALVE/173814424654
Paul Birkeland said:Those are the real deal.
Paul Birkeland said:If one puts feedback around a circuit, a tube like a 6SN7 can be made to work properly.
300Bs in the Crack circuit would be a poorer choice to drive power hungry headphones, especially low impedance ones.
Tom-s said:You'd be better off with a Kaiju.
Thats probably more easy as converting Crack for 300b output tubes.
Crack puts out 0.3w into 300ohms i think.
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