Gary -
I have run into the size problem also. The RCA manual specifies outline
18A and 32 for the 6GJ5 and 6GJ5A respectively. As discussed yesterday,
I have also seen 6JB6(A) that were too tall, but not of the 'four'
brands. Do you have a transmitter open where you can measure the ACTUAL
internal height of the cage. I've done it before, but can't find the info.
I have NOT run into the failure to neutralize though, but I stick to the
'four'. Some 6JB6(A) of off brands will not neutralize, and I assume
the GJ's that fail are made by the same manufacturer!
It's perhaps possible to neutralize these by adding or subtracting the
neutralizing capacitance, but I figure if they need that, then there may
well be something else that could cause trouble later. Bottom line is
these are 15 kHz tubes, NOT 30 MHz tubes.!
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-B, C-Line&
TR-4/C Service Supplement CDs
<www.k4oah.com>
Gary Poland wrote:
I own a few pairs of 6GJ5's, one pair is too high to fit into the
4-line PA compartment. Neither set of tubes would neutralize in a
T-4XC. I havent tried adding or removing capacitance to the
neutalizing trimmer to see if I could get them to work. Just a heads up.
73, Gary
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