[ARC5] ARC5 Digest, Vol 136, Issue 19
Paddy Ryan
pei7cn at eircom.net
Mon May 25 15:01:09 EDT 2015
Yeah..in the BFO coil box on a BC-453.. a small cap lead was left 1/8" away
from a new blank terminal never connected or even tinned for solder..but at
least I found it and rock'n roll..73 de Pat/EI7CN
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Subject: ARC5 Digest, Vol 136, Issue 19
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Today's Topics:
1. Re: Cross Pond Attempt AN/GRC-9 and WS-19 Operations - COMEX
0400Z 25 MAY 2915 (Kenneth G. Gordon)
2. Re: BC-455 cleaning (My experience) (Bill Cromwell)
3. Re: BC-455 - intermittant LO. (Dennis DuVall)
4. Re: BC-455 - intermittant LO. (Bill Cromwell)
5. Re: BC-455 - intermittant LO. (Kenneth G. Gordon)
----------------------------------------------------------------------
Message: 1
Date: Mon, 25 May 2015 09:25:15 -0700
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: Christopher Bowne <aj1g at sbcglobal.net>
Cc: ARC5 at mailman.qth.net
Subject: Re: [ARC5] Cross Pond Attempt AN/GRC-9 and WS-19 Operations -
COMEX 0400Z 25 MAY 2915
Message-ID: <55634CEB.9709.12642343 at kgordon2006.frontier.com>
Content-Type: text/plain; charset=ISO-8859-1
Drat! I wish I had known of this operation before this. I have an AN/GRC-109
and would have loved to have been involved in this.
vy 73,
Ken W7EKB
On 24 May 2015 at 19:08, Christopher Bowne wrote:
> Peter, PA0PJE and I are going to try to do some low power tactical HF
> radio ops
> at midnight Monday morning (0000 Eastern Daylight/0400 Zulu (that's up
> late
> Sunday night here, up early in Holland Monday morning) on 40 CW using
> AN/GRC-9
> and WS19 sets.? I will be at home using my home station dipole, and Peter
> will
> be at Fort bij Edam,? one of the old coastal defense line of forts around
> Amsterdam, where they have an exhibition of old gear like a 19-set and of
> the
> Angry 9 set up.? We will start on or around 7035 kHz, and go down? as low
> as
> 7026 kHz.? Listen for the chirps! If you want to play, bring up your 9 set
> or
> 19 set!? We will standby for any others.?? My GRC-9 will be in the Tacoma
> on
> the home dipole for the start of the fun. If signals are good on the
> AN/GRC-9
> with the dipole, I will switch to? the mobile antenna on the Tacoma to see
> if
> that will be a go.? My 19 set on the dipole made it over to Giles, G0NXA
> last
> night so we should have a shot at it. 73 de Chris, AJ1G Stonington, CT
>
> ?
> ______________________________________________________________
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> Please help support this email list: http://www.qsl.net/donate.html
Kenneth G. Gordon W7EKB
"Courage is being scared to death but saddling up anyway."--- John Wayne
------------------------------
Message: 2
Date: Mon, 25 May 2015 12:45:09 -0400
From: Bill Cromwell <wrcromwell at gmail.com>
To: arc5 at mailman.qth.net
Subject: Re: [ARC5] BC-455 cleaning (My experience)
Message-ID: <55635195.6010601 at gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi Les,
.....Andrew,
I have a couple of radios in poor condition that are slated to return to
active duty. I have five others that are "reasonably" clean. I'll be
doing the soap and water approach on the very grimy ones. Along the way
there will be some body work..automotive style bump, fill, and paint. I
am most desperate for antennas at the moment and later this summer I'll
get "into" three of my radios. I'll post more about it when id actually
do it and others will have more to find in the archive.
I have operated around about eight of these on 90 volts from a series
stack of ten 9-volt batteries with excellent results. Note that I do not
use them to drive a speaker being a fan if high-Z cans. YMMV.
73,
Bill KU8H
On 05/24/2015 07:25 PM, Leslie Smith wrote:
> Hello Andrew,
> I'm replying to your question from my EXPERIENCE with a single BC-453.
> I got this set in poor condition; I bought it to 'rescue' the tuning
> gang.
> I decided to rescue the set - it was in a condition that could only
> make the set better.
> I based my method on the experience of those who reported putting a
> "tube" set in a dish-washer.
>
> I removed the 6 tubes, 3 IF transformers and the RF coil box. That's
> all.
> My method involved hot soapy water, followed by washing in tap water,
> followed by spraying with bathroom foam (Dot's Bath and Tile Cleaner).
> The label said, "contains quaternary ammonium compounds". After this
> used a clean paint-brush to work at the dirt under the chassis.
> This means everything around the valve sockets. Everything was foamy
> white, and the Al. chassis has a few "cleaner" streaks where Dot's
> mixture leaked out the various screw holes.
>
> I followed this with more tap water (from a garden hose) and then a
> 50-50 mix of iso-propyl alcohol and water.
> Finally, warm air + 2 days in the sun.
>
> The result? I can't tell, because my set has an intermittent fault
> around the 12K8 local oscillator circuit.
> When I turned my set on it didn't work. I found the 12K8 wasn't
> working. The set worked after I replaced it.
> BUT - I don't believe the 12K8 was faulty, because some time later the
> set failed again.
> Probing one L.O. pin (probably the anode) made the set work (for a few
> days). After that, the fault returned.
>
> The well-informed (and very modest) D.S. gave me some good advice.
> I loosened and re-tightened screws on the I.F. transformers (etc) and
> put a small amount of good quality lubricant in the bearing of the
> tuning capacitor.
>
> My set has run for some months now. I must add that I run my sets on
> a 60V B+ line.
> (If I was starting again I'd take that up to 90V; some advocate 135V,
> other a higher voltage.)
> I CAN'T say my method worked or failed, but you have my experience -
> based on a sample of one.
> However I suspect I got the set because it was faulty before I began
> the cleaning process.
>
> If any-one has a dirty, non-working "junker" they want to donate to a
> scientific cleaning (using the afore-mentioned cleaner by "Dot") I'll
> pay the cost of postage to get the set to my place for cleaning and
> de-bugging on my work-bench. I want to try running a set on DC-DC
> voltage doubler, followed by a second doubler. That should give me a
> 100V B+ supply, from the 24V filament supply.
>
> I apologize for a longer posting.
>
>
> 73 de Les Smith
> vk2bcu at operamail.com
>
>
>
------------------------------
Message: 3
Date: Mon, 25 May 2015 10:19:24 -0700
From: Dennis DuVall <duvallddennis at gmail.com>
To: kgordon2006 at frontier.com
Cc: ARC5 at mailman.qth.net
Subject: Re: [ARC5] BC-455 - intermittant LO.
Message-ID: <809A49DA-3356-444C-B038-79D2ACBB57DC at gmail.com>
Content-Type: text/plain; charset=us-ascii
It happens. Ran into that with my Elmac AF-68. Unsoldered connection in the
VFO compartment
worked FB for years before giving up in the middle of a contest a while
back.
Dennis D. W7QHO
Glendale, CA
**************
> On May 25, 2015, at 9:23 AM, Kenneth G. Gordon <kgordon2006 at frontier.com>
> wrote:
>
> Les:
>
> Concerning your intermittant LO: during a refurbishment of an R-25/ARC-5,
> I
> discovered a "no solder" joint in the coil-box, yet the joint had been
> painted
> with a dot of red "inspection" lacquer which all other joints had been.
>
> This was a factory fault.
>
> Soldering that joint eliminated the intermittant LO problems I had
> experienced with that receiver.
>
> Do remember that the LO voltage is quite low. Therefore, any such fault
> could have more effect that it would in a rig with higher voltages.
>
> Ken W7EKB
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
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> Please help support this email list: http://www.qsl.net/donate.html
------------------------------
Message: 4
Date: Mon, 25 May 2015 13:27:30 -0400
From: Bill Cromwell <wrcromwell at gmail.com>
To: arc5 at mailman.qth.net
Subject: Re: [ARC5] BC-455 - intermittant LO.
Message-ID: <55635B82.2050004 at gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hi,
The crystal filters in my Kenwood R599 are soldered in but the one in
the CW position was not soldered. It didn't fail until about 1998! I had
a monster, tube based frequency counter ( to ~1mc) that I bought at a
club auction for about a dollar and used for years. Then it sat on a
shelf for several years while I went begging for new owner. when I
finally salvaged parts from it I found a wire on a ground lug that had
never been close to solder. It had never failed.
73,
Bill KU8H
On 05/25/2015 01:19 PM, Dennis DuVall wrote:
> It happens. Ran into that with my Elmac AF-68. Unsoldered connection in
> the VFO compartment
> worked FB for years before giving up in the middle of a contest a while
> back.
>
> Dennis D. W7QHO
> Glendale, CA
>
> **************
>
------------------------------
Message: 5
Date: Mon, 25 May 2015 10:36:54 -0700
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: arc5 at mailman.qth.net
Subject: Re: [ARC5] BC-455 - intermittant LO.
Message-ID: <55635DB6.9936.12A5B97C at kgordon2006.frontier.com>
Content-Type: text/plain; charset=US-ASCII
On 25 May 2015 at 13:27, Bill Cromwell wrote:
> Hi,
>
> The crystal filters in my Kenwood R599 are soldered in but the one in
> the CW position was not soldered. It didn't fail until about 1998! I had
> a monster, tube based frequency counter ( to ~1mc) that I bought at a
> club auction for about a dollar and used for years. Then it sat on a
> shelf for several years while I went begging for new owner. when I
> finally salvaged parts from it I found a wire on a ground lug that had
> never been close to solder. It had never failed.
When I worked at the University of Montana, one of my first jobs there was
to
try to fix a Phillips research X-ray machine which had an intermittant. That
thing was full of tubes. Although I don't remember at this late date how
many, exactly, it was something very close to 100 tubes.
After much work, I finally discovered a no-solder joint to the filament
connection of a tube at the extreme bottom of the unit, buried under at
least
5 layers of wires.
Another factory error.
Fun....NOT!
Ken W7EKB
------------------------------
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