#0771 ... just fabulous ... somebody deserves a pat on the back!

[KENT TRIMBLE]

Someone Wrote:

> K2 #0771 is just a week shy of 7 years old.
>
> In that time, except for brief periods of transport to
> and from Field Day, and for bench work (upgrades), it
> has  been powered on continuously.
>
> Yes, that's right, nearly seven years of power-on
> time.  Zero failures.  Never disconnected from an
> antenna.
>
> This is Collins territory, folks.

Taking nothing away from Elecraft -- for the praise is well deserved,
especially the bit about being in Art Collins' league -- yet in all
fairness the same could be said of my Drake Twins which are now 36 years
old and have had no maintenance other than one new pair of finals about
15 years ago and one new driver about 10 years ago.

While I have not left them on continuously, they HAVE been cycled on and
off hundreds (perhaps thousands) of times during those 36 years which is
profoundly harder on components, especially switches.  Thus likewise
"zero-failures" for Bob Drake's design in whose league we can equally
put Elecraft.

However, by comparison, during assembly of a KX1 I did note the warning
in the manual about not turning the RF gain control too frequently
because that pot "has a life expectancy of 200 rotations."

Hmmmmmm.  I know I've rotated the RF gain (and also the AF gain) on the
R4-B a lot more than 200 revolutions over 36 years and have yet to need
even a squirt of De-Oxit on either one of those pots.

Moral . . .

Keep 'em cool, keep 'em dust-free, keep 'em happy with the impedance and
nearly ALL ham equipment will outlive it's owner.

My opinion only . . .


73,

Kent Trimble, K9ZTV





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[Brian Broggie-2]

Hi, Kent!

Kindly take one more look at that warning.  It is referring to the
internal RF Power Level control (R4 trimmer pot).

The RF Gain pot topside is expected to see much more use and was
selected because it will last a long time.

Merry Christmas!
Brian - W6FVI
 

k9ztv wrote:

> <snip>

> However, by comparison, during assembly of a KX1 I did note the
> warning in the manual about not turning the RF gain control too
> frequently because that pot "has a life expectancy of 200 rotations."
>
> Hmmmmmm.  I know I've rotated the RF gain (and also the AF gain) on
> the R4-B a lot more than 200 revolutions over 36 years and have yet to
> need even a squirt of De-Oxit on either one of those pots.
>
>
> 73,
>
> Kent Trimble, K9ZTV
>
>
> </snip>

>
>
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>
>

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[KENT TRIMBLE]

Brian . . .

Point taken, but we'll see.  Miniaturization comes at a price.  No one
ever replaced panel-mounted phone jacks as frequently as we do
circuit-board mounted miniatures today.  Nor did we replace mic cords
and plugs (same with telephones) as often as we have to today.

My overall thesis on dependability still stands, I think, as witness the
vintage crowd and their still-going-strong at fifty-plus years gear.


73,

Kent  K9ZTV




w6fvi wrote:

> Hi, Kent!
>
> Kindly take one more look at that warning.  It is referring to the
> internal RF Power Level control (R4 trimmer pot).
>
> The RF Gain pot topside is expected to see much more use and was
> selected because it will last a long time.
>
> Merry Christmas!
> Brian - W6FVI
>
>
> k9ztv wrote:
>
>> <snip>
>
>
>
>> However, by comparison, during assembly of a KX1 I did note the
>> warning in the manual about not turning the RF gain control too
>> frequently because that pot "has a life expectancy of 200 rotations."
>>
>> Hmmmmmm.  I know I've rotated the RF gain (and also the AF gain) on
>> the R4-B a lot more than 200 revolutions over 36 years and have yet
>> to need even a squirt of De-Oxit on either one of those pots.
>>
>>
>> 73,
>>
>> Kent Trimble, K9ZTV
>>
>>
>> </snip>
>
>

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