R390 Help needed.

[k7iou]

Yes I saw, Ken's web page is a bit confusing.

224-1594-00 Robertshaw-Acro SPDT button switch 6A-240VAC solder terminals

The above (and the other 4 Robertshaw switches) are posted without a price shown so I'm awaiting a reply to my email as to its availability.  Or was thinking one of the PH30's may work, I'm hoping their listing means one of them is equivalent to the 224-1594-00 or close enough to use.

After talking to ke7trp on 40m I found this part number in this old post. I ordered one through Kens Electronic Parts. I received it today. You have to fill out his online order form. The switch was $5 plus $4.95 shipping. As of this date 9/2/14 he has 4 in stock and he told me he won't be restocking them. See pictures attached. de k7iou

[N8ETQ]

  Hey Clark,





      My Micro Switch failed about a year ago, He's
an old one, serial 485 off a 1952 MOT contract. I
have not messed with it yet however one change
I did make to mine was to series a 10 mhy choke in
with the "Bulk HV" to keep the voltage to
6080's(?) down.

     I can't recall the particulars now as I have
had this thing for 30 years, but I seem to remember
the bulk HV was over 350VDC to the regulators which
are set for 180VDC. It really reduced the heat
coming off that thing.

     Find the wire in the Mainframes harness
and break it there, Then you can tack the choke
to the back panel and it stays with the rig. I
think the bulk HV went down to around 250 after
this mod. 

GL with the beast..

/Dan

[k7iou]

Also selling on ebay, from a listing: $19.99
NSN 5930-00-250-5089: SWITCH
One micro switch for use in the R-389, R-390, R-390A and R-391 Military Receivers as shown.  The electrical ratings are 5 AMP @ 250 VAC/10 AMP @ 125 VAC.  Identical dimensions to the original switch.  These are genuine military surplus.