[HBR] 6CX8 substitutes

[Carlos Alberto - PY4QE]

Thanks Darrel, for the information.

My question was why after researching similar tubes, all have a higher 
amplification factor on triode side. Possible substitutes that I found 
(6AW8, 6LY8, 6EB8, 6GN8 and so on) have this factor in the 70 to 100 range, 
while in the 6CX8 is 40.
I'm wondering if I can use one of those substitutes, without change some 
component values, to reduce the stage gain and prevent overload.
Moreover, in these four examples, the 6AW8 seems the most adequate, but its 
pentode plate current has a tipical value of 13mA, while in the others this 
value is 25mA, like the original 6CX8, meaning more power output. So, what 
is the best substitute, since I don't have details of the respectives 
impedances loads, as audio amplifiers?
Sorry any annoyance.

Thank you.

73, Carlos - PY4QE

----- Original Message ----- 
From: "WA5VGO" <hbrnut at suddenlink.net>
To: <hbr at mailman.qth.net>
Sent: Sunday, May 16, 2010 6:56 PM
Subject: Re: [HBR] 6CX8 substitutes


> It's similar to a 6AW8. It will fill the room with audio and then some.
> With a little negative feedback, it provides very pleasing audio.
>
> 73,
> Darrell, WA5VGO

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