[R-390] R-392/URR MWOs

[Dave Merrill]

>From this description, it would seem to apply only to the T-195B... curious.

On Feb 19, 2008 10:08 AM, Ed <jaburu at champmail.com> wrote:
>
>
> Dave:
>
> MWO 5820-335-35/1 is listed on PAM 310-4 C4, dated 14 Jul 65: " Modification
> of Transmitter, Radio T-195B/GRC-19 to prevent failure of switching
> transistors and diodes in high and low-voltage power supplies and exhaust
> blower assembly, to provide increased grid drive to the power amplifier
> stage, and to reduce the failure rate of tube type 5763."
>
> 73, Ed
> KD6EU



On Feb 18, 2008 9:15 PM, W8BVH <w8bvh at sbcglobal.net> wrote:
> Dave I would also like to know as I have obtained a dirty R-391, ser.#105,
> w/ a sticker or label above the name plate. It's almost like a water slide
> on label. The label reads: MWO II 5820-294-35/1.
> Hope someone answers you w/ dope.
> Best regards,
> Ralph Howes
> W8BVH
>
>
>
> ----- Original Message -----
> From: "Dave Merrill" <r390a.urr at gmail.com>
> To: <R-390 at mailman.qth.net>
> Sent: Monday, February 18, 2008 3:51 PM
> Subject: [R-390] R-392/URR MWOs
>
>
> > Yesterday a Tobyhanna depot overhauled R-392 sold on eBay (item
> > 250214992646).  The carton was stamped 12/81, perhaps making it one of
> > the last ones to have such treatment.  A sticker above the nameplate
> > indicated that MWO-5820-335-35/1 had been applied.  Anybody know what
> > this MWO consists of and the details of it's implementation?
> >
> > MWOs are listed in DA PAM 310-4 but I no longer have access to that
> > document.  As expected, an ETM search at LOGSA came up empty.
> >
> > /dave
> > N9ZC