[ARC5] Tuning Knob

[Robert Downs]

The fact remains that for whatever reason, the similar production crank (that I have one of somewhere) uses a steel or SS rivet in the center, not brass.  And has an engraved and black-filled reference mark opposite the crank throw.  So the one photographed wasn't made on an Army, Navy or Air Force contract.

Robert Downs


-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On Behalf Of MICHAEL BITTNER
Sent: Sunday, October 31, 2021 23:32
To: Michael Hanz; Brian Clarke; Adam Castellani; arc5 at mailman.qth.net
Subject: Re: [ARC5] Tuning Knob

I picked up this Cardwell var cap at the TRW swap meet yesterday.  Note all the Brass-on-Aluminum faying surfaces.  No signs of corrosion on this decades old component.  So how does Cardwell get away with what "no chemist or physicist would do"?  Mike, W6MAB

> On October 31, 2021 at 9:54 PM Michael Hanz <aaf-radio-1 at aafradio.org> wrote:
> 
> 
> Agree.  Nicely made, but....
> 
> On 10/31/2021 9:33 PM, Brian Clarke wrote:
> > No chemist / physicist would put brass and aluminium together; 
> > hence, not a production item.
> > So, probably after market, home made. Possibly a once-off.
> > 73 de Brian, VK2GCE