AB2TC - Knut
W8JI wrote:
>
> Knowing the problem we had on assembly lines with small
> screws... :-)
>
> 73 Tom
> - Original Message -
> From: "Don Wilhelm"
> To: "Jack Brabham"
> Cc: "'elecraft@mailman.qth.net'"
dnesday, May 12, 2010 5:36 PM
To: Jack Brabham; d...@w3fpr.com; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3} Help, hex key for split knob
Here's a link I just found
http://www.radax.com/store.asp?pid=15198
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Here's a link I just found
http://www.radax.com/store.asp?pid=15198
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This li
> The "pinky" tight approach is OK if you are working with a
> "D" shaft that
> provides positive indexing. Otherwise, as in the round
> shaft K3 concentric
> pots, the set screw has to be very tight to maintain the
> knob indexing.
Jack,
We used tens of thousands of knobs at Prime, Heathkit,
Out of curiosity reading this thread I just removed the knobs on my K3
for the first time since they were installed nearly two years ago. The
screws came out easily after the initial stiction was overcome;
Twirling the wrench between thumb and index finger is all that is
required to drive the screw
27;elecraft@mailman.qth.net'
Subject: Re: [Elecraft] [K3} Help, hex key for split knob
Jack,
If you stripped out the allen wrench, you were applying more force than
is necessary, and excessive force may be the reason some of the newer
knobs are cracking (that is just a guess).
73,
Don W3FPR
J
My personal rule for torque-wrenching small allen screws (once I know
threads are clear) is "pinky pressure".
I turn the allen wrench until it *just barely* runs into resistance.
Then I put my pinky on the wrench and let some of the weight of my
forearm (no pushing) tighten it up. Should not ever
> My experiences are different. For small knobs you need to
> use high
> quality wrenches. Those .050 do work if you have a good
> one. It's
> amazing how much twist you can put in a high quality Allen
> wrench
> while trying to deal with a stubborn screw.
I would not ever force the screw.
Knowing the problem we had on assembly lines with small
screws... :-)
73 Tom
- Original Message -
From: "Don Wilhelm"
To: "Jack Brabham"
Cc: "'elecraft@mailman.qth.net'"
Sent: Tuesday, May 11, 2010 6:38 PM
Subject: Re: [Elecraft] [K
Jack,
If you stripped out the allen wrench, you were applying more force than
is necessary, and excessive force may be the reason some of the newer
knobs are cracking (that is just a guess).
73,
Don W3FPR
Jack Brabham wrote:
> Tim,
>
> I had a similar experience assembling #4169 a few weeks ag
My experiences are different. For small knobs you need to use high
quality wrenches. Those .050 do work if you have a good one. It's
amazing how much twist you can put in a high quality Allen wrench
while trying to deal with a stubborn screw. The next thing is to
make sure that you have the
torque over the screw's full
diameter.
73 Jack KZ5A
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of N3XX
Sent: Sunday, May 09, 2010 8:45 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] [K3} Help, hex key for split
David Dunn wrote:
> I wonder why Elecraft used "inch" measure Allen screws?? when all the
> other threads in the K3 are metric.- Perhaps they had similar problems!
>
>
I am not certain why you think the other threads are metric in the K3 -
most of the screws are 4-40 which are not a metric si
nished. I
don't think there was actually any marking I could see anyway.
73,
Tim - N3XX
- Original Message -
From: "David Dunn"
To: "elecraft@mailman.qth.net"
Sent: Sunday, May 09, 2010 4:47 AM
Subject: Re: [Elecraft] [K3} Help, hex key for split knob
>I
I cannot imagine it would be hard to buy imperial measure Allen keys in USA
!
Even in VK land where "standards" of measure are very dubious. (officially
all metric) Our signposts in Kilometres, goods sold by the Kilogram,
Timber by the metre, - but they still talk about 4 x 2's and 6 x 8 ft
sheet
If you can't find it at the hardware boutique, if there's a hobby shop
close, try that. I'd take the knob with me.
73,
Mike NF4L
ab2tc wrote:
> Hi all,
>
> I guess I"ll be heading out to the hardware store for a 0.050" or 1.27mm
> allen wrench tomorrow. My radio was a kit originally, but I bought
Hi all,
I guess I"ll be heading out to the hardware store for a 0.050" or 1.27mm
allen wrench tomorrow. My radio was a kit originally, but I bought it 2nd
hand from the builder and may not have recieved the allen key.
AB2TC - Knut
N1JM wrote:
>
> If yours was a kit, you should of got one wit
Knut,
Any hardware store worth the name would have it.
NAPA or virtually any auto parts supply store.
Sears
73! Ken Kopp - K0PP
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If yours was a kit, you should of got one with it. However, I suspect you
could get one from Elecraft. The small knobs use a .050" and the large knobs
take 5/64" allen wrench.
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-Help-hex-key-for-split-knob-tp5024310p5024343.h
Hi all,
My RF gain knob finally did the inevitable, it split and fell off. I had
seen the crack and expected this so I have a full set of concentric knobs on
hand supplied free by Elecraft. But they did not supply a hex key and I
don't have one that is small enough! My smallest metric one is 1.5m
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