[Boatanchors] Is 4657 same animal as the 8072?

[Jim Wilhite]

Be careful Carl, there are a lot of us ex Motorola people around :>).

I serviced a lot of Motrac UHF mobile and base stations with that tube 
in it and it is an 8072.  Those radios in mobile service took a beating 
from start to finish in some concrete trucks and didn't require changing 
very often.  Good tube.

Jim/W5JO


----- Original Message ----- 



> Yes. It is Motorolas usual way of ripping off customers with a 
> "special"
> tube. GE ran their systems just fine with a 8072! The 4657 supposedly 
> was
> more shock resistant but since its Moto, that is questionable.
>
> Carl
> KM1H
>
> ----- Original Message ----- 

>
>
>> Some of you land mobile radio people may be able to tell me 
>> if.......a
>> Motorola 4657 planar conduction cooled beam power tube is equivelent 
>> to
>> the
>> RCA 8072 tube?
>>
>> I have several of these NOS and curious to know.
>>
>> All indications are they are the same, but I'd like to hear it from
>> somebody
>> that has dealt with them before.
>>
>> 73,
>>
>> Sandy W5TVW