Returning to Mikes original question – why did the silver plated brass connector corrode where it is in contact with aluminium ?
I’m not well versed in these matters but I thought it would be the aluminium corroding.
Certainly, stainless steel and aluminium is not advised – but there are so many different alloys of each that you need to know more about the composition of each material.
From: UKMicrowaves@groups.io [mailto:UKMicrowaves@groups.io] On Behalf Of Neil Smith G4DBN
Sent: 22 October 2020 20:03
Subject: Re: [UKMicrowaves] Stainless steel N connector.
Hi Mike, TE/AMP make passivated stainless steel bodied N sockets rated to 11 GHz
They also do nickel-plated stainless.
Furiously expensive of course. £34 + vat from RS, much more spendy from Farnell
H&S also do some which are at even MORE coin:
On 22/10/2020 18:22, Colin Ranson wrote:
I am looking for a four hole mounting female N connector in stainless
steel ( if such a thing exists ) to replace the one on a helix feed to
my QO-100 uplink antenna. After a year, the silver plated brass
connector is heavily corroded where it is mounted on the aluminium
reflector plate. It was originally built for Oscar 40 and wasn't
intended for permanent outdoor mounting.
The alternative is to replace the aluminium plate with stainless steel
and reuse the brass connector.
If anyone can help it would be appreciated!
73, Mike, G3LYP.