[R-390] Last question of the day: The "X marks the spot" hold down thingy

[Doug Hensley]

That is an excellent reminder of the conditions on some vessels.  It also attests to the practice
of keeping tube shields in place because of the possibility of loosening over a period of time.
The issue of heat was secondary if at all.  It was vibration !

Doug, W5JV, NFIT, NFMK, NDRS, N0WJF, NNN0BXX . . . sadly now dry docked 🙁 ....


Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds.



________________________________
From: Thomas Chirhart <k4ncgva at gmail.com>
Sent: Thursday, July 8, 2021 5:12 PM
To: Doug Hensley <w5jv at hotmail.com>
Cc: Collins R-390 HF Receiver List <r-390 at mailman.qth.net>
Subject: Re: [R-390] Last question of the day: The "X marks the spot" hold down thingy

Likely built to spec considering the rocking and rolling of ships and the constant vibration from the propeller shafts and generators onboard ship- speaking from experience as a Tin Can Radioman…
73 Tom K4NCG RM2/USN back in the R-390 days..

Sent from my iPhone

> On Jul 8, 2021, at 5:25 PM, Doug Hensley <w5jv at hotmail.com> wrote:
>
> Over the octal crystal plug-in, some R390A's have a light aluminum X-shaped hold down
> bracket which hooks to springs on its sides.
>
> Okay, common sense tells me this not only is not necessary but is probably a pain in the
> patuit to remove & replace.   But, I want to ask anyway:  has anyone tried something like
> a capacitor hold down cap or ???
>
> Thanks to all for the info & great banter here.  I'll try to behave tomorrow and let you
> guys get some rest 🙂 ....
>
> Cheers,
>
> Doug W5JV
>
>
>
>
> Visit https://www.qrz.com/db/W5JV for some great vacuum tube finds.
>
>
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