[ARC5] BC-454-B Power

[Michael Hanz]

That should be modulator for the VT-52 - my eyes must have blinked when 
I wrote it.

On 7/20/2021 8:31 AM, Michael Hanz wrote:
> On 7/19/2021 11:29 PM, Hubert Miller wrote:
>> Ken's comment that
>> "I know that too, Brian, but the 6F6 is a much taller and fatter tube 
>> and won't fit in the radio with the covers on",
>> reminded me of this: the GF transmitter has a tube cover that is 
>> raised higher than the rest of the transmitter top
>> surface. It's almost like an oops, modification of an earlier design 
>> to fit the taller 837 tubes. It must have been much
>> more expensive to cast this raised cover than to simply cut a flat 
>> metal sheet to cover the tube compartment.
>> Anyone know the "why" ?
>
> KK5F's groundbreaking and exhaustive review* of the early "command 
> sets" shows  the earliest GF-1 had three Navy nt-38110A (AKA Type 10 
> tubes) and one nt-38142 final (45 special, AKA VT-52).  There was a 
> shift  to a couple of 89s and a pair of 837s by the GF-8 and 
> later...not sure when that occurred.  That perhaps explains the 
> doghouse on the tube cover - it's only sheet metal on mine, not cast.
>
> *I only have his 20 Jan 2015 version, so there may be more in later 
> revisions.
>
>        73,
>  - Mike  KC4TOS
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-- 
Michael Hanz - KC4TOS