[R-390] Detent spring?

[Dulaff, Paul]

Joe

There are various grades of stainless steel that are for springs (both
cantilever and helical) and work well. The thing to check for is if the
detent spring is made of spring steel, phosphor bronze, or beryllium copper
and has been nickel plated. It will appear to look like stainless steel, but
wear marks from use will have worn through the plating and exposed the base
material. If fabricating a replacement spring, knowing the material is
important. The modulus of elasticity for the above listed materials varies
significantly and would have a significant effect on function. If necessary
, I can check my radio and determine the material.

Paul - WB2NMI

-----Original Message-----
From: r-390-bounces at mailman.qth.net
[mailto:r-390-bounces at mailman.qth.net]On Behalf Of Joe Foley
Sent: Wednesday, February 09, 2005 5:42 PM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] Detent spring?



--- John KA1XC <tetrode at comcast.net> wrote:

> Hi Joe,
> hmm, the price seems a bit high, around $20 would be
> more in my comfort
> zone. But new springs would be very cool as it's
> hard to find replacements
> without any wear. Would they be stainless like the
> originals?
++++++++
You're right, it is high, I was not impressed either,
but the potential supplier is sticking with that
estimate, he's doing a bid for it now so we'll know
more later.

I didn't know they were stainless, are you sure?

Stainless doesn't usually make a great spring.

Joe



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