Concerning SB-401's Relay #1 (RL-1)

[Robert Myers]

Hi everyone,

Two questions concerning the SB-401's Relay #1  (RL-1, the multipole relay
that clicks ON when the Morse key is keyed down, or the '401 is switched to
TUNE --- not the antenna relay):

 

1.  What are the contacts made of?  All mine look completely black.  Is that
normal, or should I give them a half second dunk in TarnX then quickly rinse
them all off thoroughly with Anhydrous 100% concentrated Isopropyl Alcohol?
I'm asking about TarnX because I've used DeoxIT on them, and washed them
with SuperWash (MG Chemicals), and they still look all black to me.

 

2.  There is a recommendation to ground pin 7 of this relay (not in my
original manual).  How important is that?  Did anybody do this and find it
fixed a problem?  If so, what was the problem you had before doing that?

 

Thanks,

--- Rob VE3JQL

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