[Racal] Re: [R-390] Re: Racal RA-117 Assistance needed

[robin filby]

Hi.
    With ref to your email regarding the 117, if you would like to email me
regarding probs
with this rx, feel free to contact me.

Rgds Rob.
----- Original Message -----
From: "Jordan Arndt" <jordana at nucleus.com>
To: "boatanchors" <boatanchors at mailman.qth.net>; "Collins Reflector"
<collins at mailman.qth.net>; "R-390 Group" <r-390 at mailman.qth.net>; "RACAL"
<racal at mailman.qth.net>
Sent: Sunday, July 25, 2004 5:09 PM
Subject: [R-390] Re: Racal RA-117 Assistance needed


> Can anyone give me any tips or info on the reliability of components in
the
> older RACAL receivers...I'd like to know what someone else may have found
> regarding the Paper Caps , resistors etc....Does anyone know an e-mail
address
> for Robin Filby, who is supposed to be one of  the vintage RACAL
experts..?
> The RA.117 that I'm working on has a date of 1965 and a Canadian Marconi
> 'Depot date' of 22/10/1975....
>
> The previous user had dissassembled the ENTIRE radio right down to the
> modules, and I really could use some discussion with some who has some
> experience on these fine receivers...I'm breaking it down section by
section ,
> and re-capping and replacing out of spec resistors...So far, what I've
found
> is the resistor values are lower than spec..
> ie., a 1k resistor measures 912 ohms... a 15k resistor reads 14.2k....I
> realize that the heat of summer isn't the best time to be starting this,
but
> given the extent of the work, and a 1 module per week in my 'spare time' ,
> it'll still be a couple of months before I attempt to re-apply power to
the
> reworked receiver...
>
> Interesting to note, the reason the previous user did the rework in the
forst
> place was that he had no 6688 tubes, so he 'modded' the radio to use 6EH7
> tubes...it's also filled with 6AU6WA tubes in place of all the 5749/6BA6
> tubes...and he tried to use 1/2 of a 6AL5 dudl diode to replace the EA76
> subminiature AGC rectifier....The radio did work to some extent ,
otherwise I
> wouldn't have bothered...
>
> The RA.17 is one of my favorite 'Band cruisers' , and I'm sure this will
be
> the case once the buttons go back on this RA.117....
> I will be taking detailed pictures and notes of the entire process, just
for
> posterities sake, and to document what is easily the broadest 'rework' I
have
> ever attempted...
>
> Here's to summer and to Vacuum tubes...!  73 de Jordan....
>
>
> Jordan Arndt wrote:
>
> > > I have just acquired a Racal RA.117 receiver....
> > > I would like to know if anyone who has one in good original condition
,
> > > that could take some clear quality pictures of some detail I need in
the
> > > IF section , at least to start with...
> > > The previous "user" replaced the 6688 tubes with 6EH7 tubes, redid a
> > > bunch of the wiring, and generally hacked up one of my favorite all
time
> > > BA's...
> > > I got it 'fairly' cheap, and I would much prefer to get it back in
shape
> > > and working, as opposed to parting it out or selling it as is...
> > >
> > > I have the online manual, but the pictures, and even the schematic
> > > aren't of much help , as they are not at all clear enough for detailed
> > > viewing...
> > >
> > > 73 de Jordan....
>
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