[R-390] misc posts

[Perry Sandeen]

 Hi John,
My error in my choice of words.  What I meant to say was that the cost of SS screws in bulk was just a modest amount more than the ordinarily used nickle or cadmium plated screws.
for me personally, I feel that it is good value to replace all the B/A screws, lock washers, and nuts with SS.  The last time I counted the cost for doing so for a SP 600 it was around $15-$20.  

Another advantage I found by buying SS screws from McMaster-Carr is that instead of using the OEM style slotted flat head style one can get the equivalent screw with a Phillips head.  I find thees much easier to use in many tight locations.  This allows me to make a tighter connection without slipping off the screw head and scratching the chassis.
Sorry for the confusion.
Regards,
Perrier  

    On Thursday, May 23, 2019, 4:31:11 AM PDT, <jgedde at optonline.net> wrote:  
 
 " SS is very little more than plated steel."  That's one of the common urban legends of our time.  It may be true when it comes to cheap tableware, but real SS is not just plated steel.  It is a bona fide steel alloy and is 'stainless' through and through.  There are many many different alloys with different properties (some can and do rust, some don't), some are magnetic some are not, etc.  There's so much to cover for a real explanation of stainless steel, but I can assure you it's not plated except in some uncommon cases where the alloy is externally passivated or plated with something else as a surface treatment for appearance or to get improved resistance to corrosion.  

https://en.wikipedia.org/wiki/Stainless_steel

John

-----Original Message-----
From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> On Behalf Of Perry Sandeen via R-390
Sent: Thursday, May 23, 2019 1:59 AM
To: r-390 at mailman.qth.net
Subject: Re: [R-390] misc posts

Yo Bubba Dudes!,
The mounting screws are 10-32 for the R39X and SP 600.  Others are either 8-32 or 6-32.  IIRC the tube socket screws are 4-40 are are those in the SP 600. I buy them in SS from McMaster-Carr by boxes of 100.  They have every type of screw head one wants. SS is very little more than plated steel.  They look great and won't every fade or rust.
Wanting a R 389.  I wanted one years ago but i didn't have enough grandchildren to sell.  I also realized that using, maintaining and repairing it was far moe work than I ever wanted to get into.
The R725.  If it's a ladies radio get me a dress and some lipstick. (As I live in CA no one would bat an eye - even if I grew a beard with my new outfit.  It doesn't have the ringing of the mechanical filters.  If you can score a Non-A IF [a difficult feat in of itself] Tom Marcotte (sp) wrote a step by step article to be able to add it to your *A* that's in the Y2KR3 manual.  Or if one comes up for sale on ebay, pay the price -you can cry about it later- and enjoy.

But if you want to be a real Caveman man and suffer the OEM crappy audio - go for it. We don't discriminate against masochists on the list.
The R390 Non A
Wrote: 
"TheR-390 is a man’s radio, the R-390A is a boys radio." I'd love to hear moreabout why that is...  I wanna be aman!  LOL


Well, first you have to find one to buy. Then see if your credit card can take the hit.

Then, You'll have the heat to deal with. There is an expensive to maintain, complicated regulated PS.  Less commonly used IF tubes which are in a series circuit, large leaking oil caps, almost impossible to find spare parts for starters......so go for it Bubba.  It'll keep you out of gin mills in the winter time. 


 But there is the nice sounding LC IF and the potential for a good audio and other upgrades. Also the issue of getting nice clean large ski's... 


So put on you're Fred Flintstone outfit grab a club and charge!


Of course as our most respected senior: senior member Les Locklear would add: YMMV


Regards,
Perrier














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