[ARC5] Tuning Knob

[frledda at att.net]

Hi All,

 

I am looking for the base of an ARC-5 or post war D-10A dynamotor. I mean to say the plate where the dynamotor is attached to.  Of course, I am not asking to cannibalize a good dynamotor.

 

Best, Francesco K5URG

 

From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf Of MICHAEL BITTNER
Sent: Monday, November 1, 2021 5:25 PM
To: Mike Feher <n4fs at eozinc.com>; Michael Hanz <aaf-radio-1 at aafradio.org>; Brian Clarke <brianclarke01 at optusnet.com.au>; Adam Castellani <adamcastellani at yahoo.com>; arc5 at mailman.qth.net
Subject: Re: [ARC5] Tuning Knob

 

Yes, apparently combination of brass and aluminum is OK if properly stored in dry conditions or used away from moisture and hygrosocpic material such as dust.  The after-market copies of the mil. spec. spin knobs are cool, but as you say, not acceptable for military use.  Still wondering where they came from.  Mke, W6MAB (occasional lathe operating goober)

On November 1, 2021 at 2:09 AM Mike Feher <n4fs at eozinc.com <mailto:n4fs at eozinc.com> > wrote: 

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: arc5-bounces at mailman.qth.net <mailto:arc5-bounces at mailman.qth.net>  <arc5-bounces at mailman.qth.net <mailto:arc5-bounces at mailman.qth.net> > On Behalf Of MICHAEL BITTNER
Sent: Monday, November 1, 2021 12:32 AM
To: Michael Hanz <aaf-radio-1 at aafradio.org <mailto:aaf-radio-1 at aafradio.org> >; Brian Clarke <brianclarke01 at optusnet.com.au <mailto:brianclarke01 at optusnet.com.au> >; Adam Castellani <adamcastellani at yahoo.com <mailto:adamcastellani at yahoo.com> >; arc5 at mailman.qth.net <mailto: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 < <mailto:aaf-radio-1 at aafradio.org> 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


 

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