> In a message dated 12/17/2006 7:44:47 P.M. Eastern
> Standard Time,
> bmaser@tampabay.rr.com writes:
>
> have my MLA2500 up for sale on QTH.com and I received a
> query as to
> whether the 10 Meter mod had been done. How do you tell
> other than trying
> to load it up on 10?
Bob,
Dentron kind of built to fit the mood of the day and the
availability of parts. Dentron did a combination of five
things to prevent 10 meter operation:
1.) They moved the adjustable stop in the bandswitch to
prevent turning the switch to ten meters.
2.) They did not have a tuned input section installed for
ten meters in amps that had the ATI-6 (tuned input) board.
3.) Sometimes they left the relay wire to the ATI-6 board
out.
4.) They left the wire out that goes from the ten meter tap
on the tank coil to the ten meter terminal of the
bandswitch.
5.) They installed a trap or lowpass in amps that had
combinations of the above mods but still failed the 25-30MHz
gain restrictions for type-acceptance. This was generally
the higher gain amplifiers using ceramic tubes.
This varied with production runs of the various amplifiers
as well as the particular model.
73 Tom
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