[R-390] Re: R-390 Digest, Vol 18, Issue 21

Wed Oct 12 19:56:09 EDT 2005

Hello All,

Sorry to beat a very dead horse but I'm looking for a current
source for 390A front panel painting. I have a Collins 390A
with a rough front panel, all original, needs some work (had audio
for about 5 minutes, then dead...) I'm planning on doing a complete
restoration on it. (got my Orange drops, B+ fuse holder and new microswitch
in hand..) . Anyone have any recommendations for a front panel painter?
(this is an engraved panel.....)

73,

Paul W4QG

----- Original Message -----
From: <r-390-request at mailman.qth.net>
To: <r-390 at mailman.qth.net>
Sent: Wednesday, October 12, 2005 4:02 AM
Subject: R-390 Digest, Vol 18, Issue 21

> Send R-390 mailing list submissions to
> r-390 at mailman.qth.net
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://mailman.qth.net/mailman/listinfo/r-390
> or, via email, send a message with subject or body 'help' to
> r-390-request at mailman.qth.net
>
> You can reach the person managing the list at
> r-390-owner at mailman.qth.net
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of R-390 digest..."
>
>
> Today's Topics:
>
>    1. Re: 3tf7 replacement proceedure (Norman J McSweyn)
>    2. RE 3tf7 replacement proceedure (Steve Hobensack)
>    3. Re: 3tf7 replacement proceedure (Mark Huss)
>    4. Re: Re: More stuck slugs (Flowertime01 at wmconnect.com)
>    5. Re: 3tf7 replacement proceedure (Flowertime01 at wmconnect.com)
>    6. Re: Re: R390A meter movment current. (Flowertime01 at wmconnect.com)
>    7. Re: 3tf7 replacement proceedure (Michael Murphy)
>    8. OT - Gazillion Dollar Collins Headsets? (Patrick Jankowiak)
>    9. R-390A Rectifiers (Patrick Jankowiak)
>   10. OT: wanted: cabinet for RBB receiver (Patrick Jankowiak)
>   11. Re: Wanted: RBA  (was: R-390 Non-A NameTag...) (Ed Zeranski)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 11 Oct 2005 17:40:50 -0400
> From: "Norman J McSweyn" <normn3ykf at stny.rr.com>
> Subject: Re: [R-390] 3tf7 replacement proceedure
> To: "John Lawson" <jpl15 at panix.com>
> Cc: r-390 at mailman.qth.net
> Message-ID: <009001c5ceac$72f012c0$6401a8c0 at anchor>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=response
>
> Thanks all for the input. The resistor is an easy fix. Tonight is tube
> socket resistance checks for the radio with all modules in place. I love
> being on vacation.
> Norm
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Tue, 11 Oct 2005 17:42:58 -0400
> From: "Steve Hobensack" <stevehobensack at hotmail.com>
> Subject: RE [R-390] 3tf7 replacement proceedure
> To: r-390 at mailman.qth.net
> Message-ID: <BAY109-F19717BA86BCD3D88B050FECA780 at phx.gbl>
> Content-Type: text/plain; format=flowed
>
> Norman,
>     You could probably leave the the wires the way they are on the 3tf7
tube
> socket and add two jumpers to encompass the filament of the new 12bh7.
That
> way, if you ever come across a 3tf7 at a hamfest/radio fest at a decent
> price, you could just plug it in.
> .....Steve...N8YE
>
> Message: 4
> Date: Tue, 11 Oct 2005 00:34:44 -0400
> From: "Norman J McSweyn" <normn3ykf at stny.rr.com>
> Subject: [R-390] 3tf7 replacement proceedure
> To: <r-390 at mailman.qth.net>
> Message-ID: <015701c5ce1d$1b13e7f0$6401a8c0 at anchor>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Hi all.
> I've been doing some reading on the 3tf7 replacment schemes. For the
> time
> being I think I'll use a 12bh7 in place of the 3tf7.
> All I have to do is move the wire on pin two to pin four and the wire on
> pin
> seven to pin five, right?
> de n3ykf
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Tue, 11 Oct 2005 20:50:43 -0400
> From: Mark Huss <mhuss1 at bellatlantic.net>
> Subject: Re: [R-390] 3tf7 replacement proceedure
> To: Norman J McSweyn <normn3ykf at stny.rr.com>
> Cc: r-390 at mailman.qth.net
> Message-ID: <434C5DE3.10708 at bellatlantic.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> At first, I used 18 gauge solid wire, bent to fit to center the
> wirewound resistor vertically in the tube socket.  Then, using high
> temperature epoxy, and the bad 3TF7 to make a mold, i made a solid
> plug-in base.  Now it can't fall over and short something.  Used Ohmite
> L12J47R 12 watt, or  the  L25J50R will do, too.  This way if I ever get
> around to getting another 3TF7, I can just plug it in.
>
> Norman J McSweyn wrote:
>
> > Mark, I considered the 47 ohm 10 watt resistor. The problem is how to
> > mount it. 1. Vertically in the tube socket secured how?
> > 2. Underneath? Not a lot of space between the bfo shaft and coupler.
> > How did you do it?
> > Norm
> >
> >
>
>
>
> ------------------------------
>
> Message: 4
> Date: Tue, 11 Oct 2005 21:22:24 EDT
> From: Flowertime01 at wmconnect.com
> Subject: Re: [R-390] Re: More stuck slugs
> To: r-390 at mailman.qth.net
> Message-ID: <be.332b4806.307dbf50 at wmconnect.com>
> Content-Type: text/plain; charset="US-ASCII"
>
> John,
>
> Not all slugs are R390 slugs. I'll bet you have encountered some that were
> wax impregnated or not exactly as robust as R390 slugs. Other slug from
other
> radios are likely to be compsed of almost anything.
>
> I just wanted to point out that I had never encountered a R390 or R390A
slug
> that would dissolve.
>
>
>
> Roger.
>
>
>
> ------------------------------
>
> Message: 5
> Date: Tue, 11 Oct 2005 21:29:37 EDT
> From: Flowertime01 at wmconnect.com
> Subject: Re: [R-390] 3tf7 replacement proceedure
> To: r-390 at mailman.qth.net
> Message-ID: <1dc.46e7ce3f.307dc101 at wmconnect.com>
> Content-Type: text/plain; charset="US-ASCII"
>
> Norman,
>
> If you have the 12bh7 base diagram from the back of a hand book you are
OK.
> I am running the modification in my R390A. Have been for 21 years.
>
> Roger KC6TRU
>
>
>
>
> ------------------------------
>
> Message: 6
> Date: Tue, 11 Oct 2005 21:47:10 EDT
> From: Flowertime01 at wmconnect.com
> Subject: Re: [R-390] Re: R390A meter movment current.
> To: r-390 at mailman.qth.net
> Message-ID: <19b.3e5789d6.307dc51e at wmconnect.com>
> Content-Type: text/plain; charset="US-ASCII"
>
> Fellows,
>
> I do not have a R390A parts manual so I need some help.
>
> What is the meter current for the R390A line level meter and the signal
> strength meter?  I don't need an exact value. What is the nominal or
specified full
> scale current?
>
> Hell I do not think I ever knew, the little critters either worked or I
got a
> new exact replacement from supply. I never use to care how much current it
> needed to peg the needle to the right side.
>
> Thanks
>
>
>
>
>
>
> ------------------------------
>
> Message: 7
> Date: Tue, 11 Oct 2005 22:24:34 -0400
> From: "Michael Murphy" <mjmurphy45 at comcast.net>
> Subject: Re: [R-390] 3tf7 replacement proceedure
> To: <Flowertime01 at wmconnect.com>, <r-390 at mailman.qth.net>
> Message-ID: <001c01c5ced4$1659ce20$6700a8c0 at hsd1.nh.comcast.net>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Of course there is the tried and true:
>
> 1. Remove the 3TF7 with tube pullers (it may be warm).
>
> 2. Replace with a new 3TF7
>
> 3. And always good advice for the R-392:
> SilicaGel - "Do Not Eat"
>
> Mike WU2D
>
>
> ----- Original Message -----
> From: <Flowertime01 at wmconnect.com>
> To: <r-390 at mailman.qth.net>
> Sent: Tuesday, October 11, 2005 9:29 PM
> Subject: Re: [R-390] 3tf7 replacement proceedure
>
>
> > Norman,
> >
> > If you have the 12bh7 base diagram from the back of a hand book you are
> OK.
> > I am running the modification in my R390A. Have been for 21 years.
> >
> > Roger KC6TRU
> >
> >
> > _____________________________________________________________
> > R-390 mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/r-390
> > Help: http://mailman.qth.net/faq.htm
> > Post: mailto:R-390 at mailman.qth.net
> > Unsubscribe: http://mailman.qth.net/mailman/options/r-390
>
>
>
>
> ------------------------------
>
> Message: 8
> Date: Tue, 11 Oct 2005 23:21:26 -0500
> From: Patrick Jankowiak <recycler at swbell.net>
> Subject: [R-390] OT - Gazillion Dollar Collins Headsets?
> To: r-390 at mailman.qth.net
> Message-ID: <434C8F46.7040204 at swbell.net>
> Content-Type: text/plain; charset=us-ascii; format=flowed
>
> I have used those Califone "language lab" headphones with fine success!
> they are made to be comfy and seem to be clear. They cab also be had for
> about $5 sometimes. some are 8 ohms, some 600.
>
> Patrick
>
>
>
>
> ------------------------------
>
> Message: 9
> Date: Tue, 11 Oct 2005 23:25:10 -0500
> From: Patrick Jankowiak <recycler at swbell.net>
> Subject: [R-390] R-390A Rectifiers
> To: r-390 at mailman.qth.net
> Message-ID: <434C9026.1090701 at swbell.net>
> Content-Type: text/plain; charset=us-ascii; format=flowed
>
> One of my R-390 units hase little solid state rectifiers plugged in. The
B+
> is somewhat higher than on the one with tube rectifiers. Should I go find
> the correct rectifiers to ease the life of the set? I never use SS rects
in
> my other old radios or tube audio gear, for that reason. I suppose it
would
> also be well to adjust the line voltage to 115V instead of 125.
>
> Patrick
>
>
>
>
> ------------------------------
>
> Message: 10
> Date: Tue, 11 Oct 2005 23:29:43 -0500
> From: Patrick Jankowiak <recycler at swbell.net>
> Subject: [R-390] OT: wanted: cabinet for RBB receiver
> To: r-390 at mailman.qth.net
> Message-ID: <434C9137.6070509 at swbell.net>
> Content-Type: text/plain; charset=us-ascii; format=flowed
>
> as long as the RBB was mentioned,
>
> Somehow I ended up with an RBB and no cabinet for it. I know it's a big
> metal box, but does anyone have one in any salvageable condition?
>
> I've previously asked the GB and other lists but no luck.
>
> Patrick
>
>
>
> ------------------------------
>
> Message: 11
> Date: Tue, 11 Oct 2005 21:51:53 -0700
> From: "Ed Zeranski" <ezeran at ezeran.cnc.net>
> Subject: Re: [R-390] Wanted: RBA  (was: R-390 Non-A NameTag...)
> To: <r-390 at mailman.qth.net>, "Roy Morgan" <roy.morgan at nist.gov>
> Message-ID: <00f501c5cee8$afec7150$4000000a at KONI>
> Content-Type: text/plain; charset="iso-8859-1"
>
>
> > I recently got an RBB and RBC with power supplies (no cables yet, alas.)
> >
> > I seek an RBA.
> >
> > Roy
> > (Washington DC area.)
> > Have Volvo, will travel.
>
> Darn it Roy! I think I have an extra but that would be a grunch
o'shipping.
>
> EdZ
>
>
>
> ------------------------------
>
> _______________________________________________
> R-390 mailing list
> R-390 at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/r-390
>
>
> End of R-390 Digest, Vol 18, Issue 21
> *************************************