Somehow I wish more people would run tubes like 4CX5000 or
4CX10000 or similar, think we would have less splatter and
cleaner/nicer sounding signals on the band.
These days we have rigs with very big power spikes that flat
tops the amplifiers and also people that drives the crap out of
their 1500 W amps to make them deliver a puny 350 Watts more.
Take a good listen to the SSB signals of today, at least 75% of
them
flat tops or doesn´t sound right.
73, Jim SM2EKM
PS: I have one brand new 4CX10000 and one brand new 4CX15000 for
sale, anyone interested?
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-----Ursprungligt meddelande-----
Från: measures@vc.net [SMTP:measures@vc.net]
Skickat: den 9 juli 1999 04:52
Till: amps@contesting.com
Ämne: VB: RE: [AMPS] 4cx10000
>
>
>>
>> My favourite tube. My question is this, how many times can you
rebuild
>> 8171s before they are tired and worn. Never having to do this i
always
>> wonder about the value of people like Econco. I have a good supply of
>> these tubes myself so have never had need to rebuild one. I have a
few
>> that are shot as well mainly using them for door stops.
>>
>
>Econco have repeatedly stated the 8171 and similar tubes could be
rebuilt
>essentially forever since the anode can be removed without loss of
metal.
>In those tubes which require cutting the ceramic-metal seal the limit
is
>the care with which the seal is cut and amount of material that is
lost.
? The metal/ceramic bond is silver-solder. The anode can be
unsoldered
as easily as it is soldered.
>Once too much material is lost (two, three or four generations in most
>tubes) the tube is unrebuildable due to the cahnge in parameters.
>
>With the 8171, I suspect a good "pull" will last a lifetime with, at
>most, one rebuild in amateur service as long as the amplifier is built
>with suitable regulation and safety circuits.
>
>73,
> ... Joe Subich, W8IK/4 ex-AD8I
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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