Elecraft

Project Knobs

Classic

List

Threaded

4 messages Options

Andy Cunningham-2

Project Knobs

Hello to everyone in the group from "Bonnie Scotland"..

I am currently tryin' to source some 2 inch - 2 1/4 inch diameter knobs for
a project that will be gettin' undertaken in
The near future..

I am in need of 3 sets of 3 (9 knobs in total) "I think".. although this may
not be case as I progress
But better I think to "plan ahead"..

Can anyone on the list give any details of a supplier, ..or possibly some
ideas from a what type of older
Radio's in the past might have had this sort of diameter of knobs
included..?

Think "VFO -Tuning Dial" sort of diameter.. and you'de near a ball-part
figure/size..

Has anyone in the past home-brewed this size and diameter of knob for a past
project..? If so, care to share how you
Did it..?

I've looked around the internet are lots of places, and there just does'nt
seem to be anyone out there who stocks
This sort of thing, both here in the UK and the US and further afield..

Really would appreciate help or ideas on this one folks..

TIA..

72's 73's [hidden email]

Andy
GM0NWI

Elecraft K2 "Fully Loaded" QRP S/n 01432
Elecraft K2 "Fully Loaded" QRO S/n 05469

No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.5.476 / Virus Database: 269.10.25/926 - Release Date: 29/07/2007
23:14

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

John E. Beech

[QRP-L] Re: [GQRP] Project Knobs

Hi Andy,
First off, does the whole knob need to be 2 " diam.? ie.
would a disc attached to an "ordinary size knob do the trick?
Failing that, you can make perfectly servicable knobs from the smaller
size coffee jar lids. Cannabalize a small knob for the brass insert to
fit the shaft. Centre this accurately in the lid and glue into place
with araldite. You can fill the remaining space with David's Isopon
paste ( cheaper than araldite ). This will add weight for a VFO dial. If
you don't have the brass fiitings and your shafts have flats on them you
can caste the paste around a greased sfhaft & then cross drill to take a
pinch bolt. Threads can be cut in isopon if you are careful.
The hardest job will be finding the centre of the lid -- you
need to carefully apply some basic geometry. If you don't like the brown
colour, be careful with the paint you apply as most of these lids are
moulded from a polystyrene based polymer, which dissolves in most
organic solvents.
That's assuming you don't have access to a lathe. If you do
just turn siome pieces of wood etc and paint them!

de John G8SEQ.

Andy - GM0NWI wrote:

>Hello to everyone in the group from "Bonnie Scotland"..
>
>I am currently tryin' to source some 2 inch - 2 1/4 inch diameter knobs for
>a project that will be gettin' undertaken in
>The near future..
>
>
>Has anyone in the past home-brewed this size and diameter of knob for a past
>project..? If so, care to share how you
>Did it..?
>
>

______________________________________________________________
QRP-L mailing list
Home: http://mailman.qth.net/mailman/listinfo/qrp-l
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

Clive Hollins

[QRP-L] Re: [GQRP] Project Knobs

Just to add a bit to John's mailing, I use perspex sheet to make dials
attached to a regular knob by scribing out a circle slightly larger than you
need. I then roughly saw it into a hehagonal shape to get rid of most of
the pointy bits. A deep score line fron the centre to the edge allows you to
fil it with wax coluring of your choosing after finishing. Then run a 1/4"
drill through the middle and bolt it up tight to a 1/4" bolt. This act as
the spindle for a drill chuck that is clamped on my bench. A medium file
held carefully over the edge of the perspex that is spinning away from you
will take the edge down to a smooth but translucent edge. A bit of Brasso
or jewellers rouge on a rag wrapped around the file will polish it to a
transparent finish and you can of course round off the edges to make it
smooth.. Finally set it on a shaft and araldite the disk to the knob (score
lline towards the panel).

----- Original Message -----
From: "John E. Beech" <[hidden email]>

> Hi Andy,
> First off, does the whole knob need to be 2 " diam.? ie.
> would a disc attached to an "ordinary size knob do the trick?
> Failing that, you can make perfectly servicable knobs from the smaller
> size coffee jar lids. Cannabalize a small knob for the brass insert to
> fit the shaft. Centre this accurately in the lid and glue into place
> with araldite. You can fill the remaining space with David's Isopon
> paste ( cheaper than araldite ). This will add weight for a VFO dial. If
> you don't have the brass fiitings and your shafts have flats on them you
> can caste the paste around a greased sfhaft & then cross drill to take a
> pinch bolt. Threads can be cut in isopon if you are careful.
> The hardest job will be finding the centre of the lid -- you
> need to carefully apply some basic geometry. If you don't like the brown
> colour, be careful with the paint you apply as most of these lids are
> moulded from a polystyrene based polymer, which dissolves in most
> organic solvents.
> That's assuming you don't have access to a lathe. If you do
> just turn siome pieces of wood etc and paint them!
>
> de John G8SEQ.
>
> Andy - GM0NWI wrote:
>
>>Hello to everyone in the group from "Bonnie Scotland"..
>>
>>I am currently tryin' to source some 2 inch - 2 1/4 inch diameter knobs
>>for
>>a project that will be gettin' undertaken in
>>The near future..
>>
>>
>>Has anyone in the past home-brewed this size and diameter of knob for a
>>past
>>project..? If so, care to share how you
>>Did it..?
>>
>>
>
>
>
> === Via the mailing list of the GQRP Club www.gqrp.com ===
>
>
>
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
> <*> To visit your group on the web, go to:
> http://groups.yahoo.com/group/GQRP/
>
> <*> Your email settings:
> Individual Email | Traditional
>
> <*> To change settings online go to:
> http://groups.yahoo.com/group/GQRP/join
> (Yahoo! ID required)
>
> <*> To change settings via email:
> mailto:[hidden email]
> mailto:[hidden email]
>
> <*> To unsubscribe from this group, send an email to:
> [hidden email]
>
> <*> Your use of Yahoo! Groups is subject to:
> http://docs.yahoo.com/info/terms/
>
>

Geoffrey Mackenzie-Kennedy-2

Re: Project Knobs

In reply to this post by Andy Cunningham-2

In 1998 when living in Luxembourg I bought some 50mm diameter knobs from RS
Components in the UK. Their stock number was 170-632. They also had the same
type of knob, which RS Components described as a Handwheel, with diameters
of 40mm and 60mm. The rim is knurled and there is a revolving handle useful
for "fast tuning", I use one on a VHF monitoring receiver and find the knob
comfortable to use. Might be worthwhile to take a look at RS Components to
see if they still sell them.

73,
Geoff
GM4ESD

Andy - GM0NWI <[hidden email]> wrote:

> Hello to everyone in the group from "Bonnie Scotland"..
>
> I am currently tryin' to source some 2 inch - 2 1/4 inch diameter knobs
> for
> a project that will be gettin' undertaken in
> The near future..
>
> I am in need of 3 sets of 3 (9 knobs in total) "I think".. although this
> may
> not be case as I progress
> But better I think to "plan ahead"..
>
> Can anyone on the list give any details of a supplier, ..or possibly some
> ideas from a what type of older
> Radio's in the past might have had this sort of diameter of knobs
> included..?
>
> Think "VFO -Tuning Dial" sort of diameter.. and you'de near a ball-part
> figure/size..

<snip>

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com