[Boatanchors] Is 4657 same animal as the 8072?

[Carl]

I figured Id get a bit of a rise out of the Moto gang!

I used to help a 2 way shop who uses my 180' tower for his repeaters and 
serviced most brands. When I started using plain  8072, 5894's etc he first 
thought I was conning him but being an intelligent fellow he soon saw thru 
the Moto scam.  Now all he sells and works on is Kenwood which I try to stay 
far away from.

Carl
KM1H


----- Original Message ----- 
From: "Jim Wilhite" <w5jo at brightok.net>
To: <boatanchors at mailman.qth.net>
Sent: Sunday, October 18, 2009 10:35 PM
Subject: Re: [Boatanchors] Is 4657 same animal as the 8072?


> 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
>
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