[Drake] T4X sticking relay

[Garey Barrell]

Drake was unable to get enough 6EV7's to meet production levels and switched to
the 6FQ7.  For a short period of time they used 6AQ8's, but using this tube in
the T-4(any) series "ONLY" required an additional 2W resistor (nominal 47 ohms)
across the V10 pins 4 and 5 to compensate for the lower filament current
required by the 6AQ8.  No resistor was required for the TR-4 series because of
the different filament circuitry.

73, Garey - K4OAH
Atlanta

----- Original Message ----- 
From: "Tony Martin" <w4foa@comcast.net>


> This may or may not be helpful, but in the errata sheet for the T4XC, Drake
> noted
> that the block diagram showing the 6EV7 as the VOX, is to be changed to read
> 6FQ7.
> 73
> Tony, W4FOA
>