[Amps] 4CX250B/F

[Steve Katz]

Guillermo, I'm not sure what RCA manual you're looking at, but the
4CX250B/7203 definitely has a warm-up time requirement, and I've always used
at least 90 seconds, preferably 120 seconds, via a electronic or
electromechanical timer -- as do all the commercial amps using these tubes.
The only difference between the "B" and the "F" is the heater
voltage/current, but they both require warm-up.  -WB2WIK/6

"Success is the ability to go from failure to failure with no loss of
enthusiasm." -Winston Churchill

> -----Original Message-----
> From:	GGLL [SMTP:nagato at arnet.com.ar]
> Sent:	Wednesday, June 18, 2003 5:27 AM
> To:	Amplificadores Lineales
> Subject:	[Amps] 4CX250B/F
> 
>     Reading RCA manual I've seen that 4CX250B (6V heater) tube requires 
> no warm-up period, but 4CX250F (26 V heater) a 30 seconds period, why 
> the difference?
> 
> Best regards and TIA
> Guillermo - LU8EYW.
> 
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps