[Milsurplus] [Glowbugs] WTD, a few SCR-274 parts

[Robert Downs]

The original cover screws were #3-48 x 7/32” brass black oxide binding head.  The screws for attaching the components inside (capacitors, coils, etc.) were #3-48 x 5/32”.  Both had internal star lock washers.  You are unlikely to be able to find any in black oxide because of OSHA and EPA.  And you are unlikely to find any of those exact lengths.  1/4” will do in place of the 7/32” as none of the holes are blind and none will hit anything else inside if they stick out a little.  However, even with internal star lock washers, 3/16” screws may bottom out in the feet on the capacitors so you may have to run a nut onto those and touch the tips to a grinder.  For finish, you can go with cadmium or nickel plating or stainless steel.  If you have a mix of original BO and new, you can blacken the heads of the new ones with Magic Marker ink.  And probably touch up the originals so that they all match.  Ink them before installation so that you don’t get ink onto the chassis.

 

The last time that I bought any, I got them from McMaster.  Delta Fasteners might be another source.

 

Robert Downs

 

From: milsurplus-bounces at mailman.qth.net [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Brad Hernlem
Sent: Wednesday, August 22, 2018 10:18
To: Hue Miller
Cc: milsurplus at mailman.qth.net; Glowbugs
Subject: Re: [Milsurplus] [Glowbugs] WTD, a few SCR-274 parts

 

I recall that the cover screws were #3 pan head ... only I'm not sure if they were #3-48 or #3-56. I think the latter.

 

Brad

KG6IOE

 

On Tue, Aug 21, 2018 at 2:43 PM Hubert Miller <kargo_cult at msn.com> wrote:

i was given a  BC-453 LF rec that appears unmodified BUT no cover, no tube hatch, no adapter plug for front. It looks worth restoring to me, so these are parts i am wanting, and the adapter plug of course in any condx. Also please suggest ( again ) the source for the little screws to secure the cover. 

tnx, Hue

 

 

 

Sent from my Verizon, Samsung Galaxy smartphone

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