[Amps] Gettering 4CX800A GU74b

[R.Measures]

On Oct 21, 2004, at 4:09 AM, Will Matney wrote:

> 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.........
>
Find a friendly succubus?

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

Richard L. Measures, AG6K, 805.386.3734.  www.somis.org