[R-390] R-390 Digest, Vol 203, Issue 1
T Via
charlestimothyvia at gmail.com
Wed Mar 17 20:54:50 EDT 2021
The FL-101 is potted and not repairable from a practical standpoint. Has
capacitors leaky enough to trip a ground fault outlet. Other than that
filter still seems to work as intended. If a good one is not found the work
arounds are as follows:
1. Use a grounded (3 wire outlet) that is not a ground fault outlet For
safety have a ground wire from the R390 to any other vintage equipment that
can be touched simultaneously with the R390 to avoid a potentially
dangerous shock from the "hot" chassis of the R390.
2. Use a line isolator transformer with the ground fault outlet but you
still need to have a chassis ground wire to other equipment as mentioned
above.
3. Discard the filter and replace it with a generic line filter with a
similar schematic diagram.
4. Wire it up without any filter. Whether this is practical depends on how
much line noise there is in your shack. Mine works fine without any filter.
5. Try a line filter from a R390A (I have not done this but it seems like
an idea to consider. But it wont fit in the existing hole in the chassis
for the R390 filter
r390s
r390
On Wed, Mar 17, 2021 at 6:45 PM <r-390-request at mailman.qth.net> wrote:
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> Today's Topics:
>
> 1. Miscellaneous R390/URR parts (Larry H)
> 2. R390 V511 / Z503 Wiring (thoyer)
> 3. Re: Miscellaneous R390/URR parts - sold (Larry H)
> 4. FL-101 for R390/URR (Ron.K3PID)
> 5. Re: FL-101 for R390/URR (Fred Moore)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 26 Feb 2021 21:57:38 -0800
> From: Larry H <larry41gm at gmail.com>
> To: R-390 Forum <r-390 at mailman.qth.net>
> Cc: Collins R-390 HF Receiver List <r-390 at mailman.qth.net>
> Subject: [R-390] Miscellaneous R390/URR parts
> Message-ID:
> <
> CAOSJ_nss6R1cZ4cXncW8Ew-1P0wMb6DQzixT2zd9mRr3vDVFzw at mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
>
> Hi all, I'm selling the rest of my R390/URR parts. 1. 5 tuning racks, 2.
> 2 rack springs. 3. 12 tuning slugs. 4. 1 original 'green' gear. 5. 1
> oldham coupler slotted center washer (7/8" diameter). 6. 1 rg213 (like rg8)
> coax cable 10.5" long with a 90 degree male C connector on both ends. All
> appear to be in good condition except for the racks and slugs (they are
> ok).
>
> I'd like to sell it all as 1 package. How about $15 +shipping (about $10)?
>
> Regards, Larry
>
>
> ------------------------------
>
> Message: 2
> Date: Sat, 27 Feb 2021 12:09:11 -0500
> From: "thoyer" <thoyer1 at verizon.net>
> To: <R-390 at mailman.qth.net>
> Cc: Collins R-390 HF Receiver List <r-390 at mailman.qth.net>
> Subject: [R-390] R390 V511 / Z503 Wiring
> Message-ID: <065F1309EE244B08ABD8BB7198BA803F at TomHP>
> Content-Type: text/plain; charset="us-ascii"
>
> Have my 390 working but while doing the If alignment, I was having trouble
> getting Z503 to peak. Upon inspection, someone was in this area before as
> Z503 only had one nut holding it in.
>
> Now I have been through the Z503 follies previously on an R389 I repaired
> for a friend so I'm pretty familiar with this area. We ended up having to
> source another Z503 as his was open.
>
> Mine measure 5.5 ohms per the manual. I have another IF module here where
> Z503 measures 15 ohms.............
>
> OK, getting off topic... I ended up removing Z503 and found the insulation
> damaged on the wire that connects it to the plate of V509 - good, maybe
> this
> is shorting somewhere and causing my issue.
>
> Before reassembling I inspected the whole area checking values and wiring.
> I
> noticed that pin 1 of V511 ties to the 470 ohm side of Z503. Per the
> schematic the only thing on Z503 should be the 470 ohm (2200 on sch) and
> the
> 0.01uf cap (R554 and C542). But as I said, there is a wire at that junction
> that runs over to V511-1. I checked my "parts module" and it is wired the
> same way so I'm "assuming" that this is a circuit change that is not
> reflected in the schematic????
>
> The IF module in my radio is SN 388 (Collins). No MOD indicated
>
> The parts module is a Motorola SN 1229, MOD 1 indicated.
>
> Tom
> W3TA
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Sat, 27 Feb 2021 17:22:51 -0800
> From: Larry H <larry41gm at gmail.com>
> To: R-390 Forum <r-390 at mailman.qth.net>
> Cc: Collins R-390 HF Receiver List <r-390 at mailman.qth.net>
> Subject: Re: [R-390] Miscellaneous R390/URR parts - sold
> Message-ID:
> <CAOSJ_ns2EJDEAmJZsN9bMzf6143yJPeYaSqYU6J-7sJaTg=
> 86g at mail.gmail.com>
> Content-Type: text/plain; charset="UTF-8"
>
> Thank you all for the large response. They've been sold to the 1st
> responder.
>
> Regards, Larry
>
> On Fri, Feb 26, 2021 at 9:57 PM Larry H <larry41gm at gmail.com> wrote:
>
> > Hi all, I'm selling the rest of my R390/URR parts. 1. 5 tuning racks,
> 2.
> > 2 rack springs. 3. 12 tuning slugs. 4. 1 original 'green' gear. 5. 1
> > oldham coupler slotted center washer (7/8" diameter). 6. 1 rg213 (like
> rg8)
> > coax cable 10.5" long with a 90 degree male C connector on both ends.
> All
> > appear to be in good condition except for the racks and slugs (they are
> ok).
> >
> > I'd like to sell it all as 1 package. How about $15 +shipping (about
> $10)?
> >
> > Regards, Larry
> >
>
>
> ------------------------------
>
> Message: 4
> Date: Wed, 17 Mar 2021 17:29:50 -0500
> From: "Ron.K3PID" <ron.k3pid at sbcglobal.net>
> To: R-390 at mailman.qth.net
> Cc: Collins R-390 HF Receiver List <r-390 at mailman.qth.net>
> Subject: [R-390] FL-101 for R390/URR
> Message-ID: <1UYvxyip9i.1KJQ9ywjQKz at zeus>
> Content-Type: text/plain; charset="utf-8"
>
> I am in need of the power line entry filter which includes the 4 pin
> connector
> for the R390/URR. I assume that the potted assembly can not be opened for
> repair!
>
> Ron K3PID
>
>
> ------------------------------
>
> Message: 5
> Date: Wed, 17 Mar 2021 22:45:17 -0000
> From: "Fred Moore" <fred_moore at usa.net>
> To: "Ron.K3PID" <ron.k3pid at sbcglobal.net>, <fred_moore at usa.net>
> Cc: Collins R-390 HF Receiver List <r-390 at mailman.qth.net>
> Subject: Re: [R-390] FL-101 for R390/URR
> Message-ID: <363ZcqwSR4832Set.1616021117 at web13.cms.usa.net>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Ron,
>
> Is it potted, or simply soldered? If soldered, you may be able to replace
> the
> capacitors, if needed. Of course, if there is a replacement available,
> that
> is easiest.
>
> -Fred
>
> ------ Original Message ------
> Received: Wed, 17 Mar 2021 10:30:24 PM GMT
> From: "Ron.K3PID" <ron.k3pid at sbcglobal.net>
> To: fred_moore at usa.netCc: Collins R-390 HF Receiver List
> <r-390 at mailman.qth.net>
> Subject: [R-390] FL-101 for R390/URR
>
> I am in need of the power line entry filter which includes the 4 pin
> connector
>
> for the R390/URR. I assume that the potted assembly can not be opened for
> repair!
>
> Ron K3PID
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> End of R-390 Digest, Vol 203, Issue 1
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