I've never seen one exactly like that before either. You might want to make a mold and create one that way. Dwight ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of William Donzelli via cctalk <cctalk at classiccmp.org> Sent: Tuesday, May 28, 2019 6:42 AM To: Bob Rosenbloom; General Discussion: On-Topic and Off-Topic Posts Subject: Re: looking for an old IBM knob from a 609 calculator panel I think that is an IBM specific knob. I will keep an eye out for one, but do not hold your breath! It is certainly not a common knob. Is it for a 1/4 inch shaft? -- Will On Mon, May 27, 2019 at 11:41 PM Bob Rosenbloom via cctalk <cctalk at classiccmp.org> wrote:

Hi Bob Even with 3d printing, you'd need to do some sanding and shaping to make it look as clean as the original. I still think casing one is the best option. If the mold is right, it will even match the surface. Dwight ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Bob Rosenbloom via cctalk <cctalk at classiccmp.org> Sent: Tuesday, May 28, 2019 8:57 AM To: William Donzelli; General Discussion: On-Topic and Off-Topic Posts Subject: Re: looking for an old IBM knob from a 609 calculator panel On 5/28/2019 6:42 AM, William Donzelli wrote: Yes, it's a standard 1/4" shaft. Might try and get one 3D printed if I can figure out how to draw it. Bob -- Vintage computers and electronics www.dvq.com<http://www.dvq.com> www.tekmuseum.com<http://www.tekmuseum.com> www.decmuseum.org<http://www.decmuseum.org>

Those knobs look like they are cast pop metal or zinc or something, not Bakelite. -- Will On Tue, May 28, 2019 at 1:27 PM Electronics Plus via cctalk <cctalk at classiccmp.org> wrote:

They look like something off an old stove ;-) ----- Original Message ----- From: "Bob Rosenbloom via cctalk" <cctalk at classiccmp.org> To: "Electronics Plus" <sales at elecplus.com>; "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>; "William Donzelli" <wdonzelli at gmail.com> Sent: Tuesday, May 28, 2019 1:55 PM Subject: Re: looking for an old IBM knob from a 609 calculator panel On Tuesday, May 28, 2019, 10:36:10 AM PDT, William Donzelli via cctalk <cctalk at classiccmp.org> wrote: Those knobs look like they are cast pop metal or zinc or something, not Bakelite. -- Will They are metal for sure. Probably cast. They are smooth, though there's a bit of corrosion and pitting on them now.There's a set screw at the bottom of the back side. Dwight suggest casting one. I've never done casting before but this might be a good thing to try it on.Would have to drill the shaft and set screw holes afterwards, and a bit of finish work to make them smooth.It's a cool panel so probably worth the effort if I can't find one out there somewhere... Bob On Tue, May 28, 2019 at 1:27 PM Electronics Plus via cctalk <cctalk at classiccmp.org> wrote:

On 5/28/19 10:35 AM, William Donzelli via cctalk wrote: What flavor pop? ("pot" metal or monkey metal). --Chuck

There?s a lot of aluminum stove knobs that might fit the bill. Google ?metal stove replacement button? and you?ll see a few. Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 ________________________________ From: cctalk <cctalk-bounces at classiccmp.org> on behalf of Chuck Guzis via cctalk <cctalk at classiccmp.org> Sent: Tuesday, May 28, 2019 3:35:01 PM To: William Donzelli via cctalk Subject: Re: looking for an old IBM knob from a 609 calculator panel On 5/28/19 10:35 AM, William Donzelli via cctalk wrote: What flavor pop? ("pot" metal or monkey metal). --Chuck