Under normal circumstances there is no problem. Probably would not be approved for mil gear. For corrosion to set in an electrolyte needs to be introduced. It could be as simple as water. 73 – Mike

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

848-245-9115

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of MICHAEL BITTNER
Sent: Monday, November 1, 2021 12:32 AM
To: Michael Hanz <[email protected]>; Brian Clarke <[email protected]>; Adam Castellani <[email protected]>; [email protected]
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 <[email protected]> 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