[Amps] Gettering 4CX800A GU74b

[Will Matney]

R.Measures wrote:

>
> On Oct 21, 2004, at 3:14 AM, Jason Buchanan wrote:
>
>> Harold B. Mandel wrote:
>>
>>> After trying out an EMTRON DX-3 and finding it
>>> prone to self-oscillation without any neutralization circuitry
>>> and susceptible to RF Feedback at 18MHz, (enought to illuminate
>>> all the LEDs on the bar graphs, all at once),
>>>
>>> And in addition to finding a tube socket that was ancient and
>>> a 12 year old tetrode in a supposedly "new" amplifier, I wonder
>>> what kind of surprises awaits owners of the DX-4?????
>>>
>>>
>>
>> Can't comment about the rf feedback setting up a carnival light show 
>> on 18MHz but i've seen a few new amps shipped with pretty old tubes.  
>> Zillions of these tubes built in the early 90s.  Ray Cronin makes 
>> special mention of the warranty going bye-bye if you put another tube 
>> in your qrotec amp that you didn't buy from qrotec - they supposedly 
>> stoke up the getter and burn them in good and long.
>> http://www.qrotec.com/tubewarn.html
>>
>> IF YOU USE TUBES OTHER THAN THE ONES DELIVERED WITH YOUR AMPLIFIER, 
>> QRO TECHNOLOGIES IS NOT RESPONSIBLE FOR ANY DAMAGE CAUSED BY THOSE 
>> TUBES. YOUR WARRANTY WILL BE VOID AS IT RELATES TO ANY DAMAGE CAUSED 
>> BY THOSE TUBES. YOU WILL BE RESPONSIBLE FOR THE REPAIR COSTS AND 
>> RETURN SHIPPING.
>>
>> THE 4CX800A (GU74b) TUBE MUST BE PROPERLY GETTERED AND TESTED BEFORE 
>> USE. THE TUBES SUPPLIED WITH OUR AMPLIFIER HAVE BEEN GETTERED AND 
>> TESTED. TUBES SUPPLIED BY OTHER VENDORS HAVE NOT BEEN PROPERLY 
>> GETTERED AND TESTED. THESE TUBES HAVE A STRONG TENDENCY TO ARC 
>> CAUSING DAMAGE TO THE AMPLIFIER. WE STRONGLY URGE YOU TO MAKE SURE 
>> ANOTHER TUBE SUPPLIER GETTERS AND TESTS THE TUBES HE SELLS AND 
>> GUARANTEES THOSE TUBES.
>
>
> Ray --  How does one getter a 4cx800A?


I'm like Rich, how does one "Getter" a 4CX800?

New one on me.........


>>
>> 73s
>>
>> Ray W. Connin, KB8VU
>> QRO Technologies, Inc.
>> ...
>
> Richard L. Measures, AG6K, 805.386.3734.  www.somis.org
>
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Will Matney