[Boatanchors] Keying Relay

J.D. Mac Aulay, WQ8U jmac6235 at yahoo.com
Wed Apr 12 22:43:44 EDT 2006


Mendalsons in Dayton has a good relay selection;  look
at their web site for details.  I have gotten several
Hg wetted contact relays there for my QSK system. 
http://www.meci.com/

You might look in  the ER archives for an article by
W8KGI on a QSK system using Hg wetted contact relays
if you want to do more than just T/R.

73
Mac
WQ8U/4
Hillsborough, NC


--- boatanchors-request at mailman.qth.net wrote:

> Send Boatanchors mailing list submissions to
> 	boatanchors at mailman.qth.net
> 
> To subscribe or unsubscribe via the World Wide Web,
> visit
> 	http://mailman.qth.net/mailman/listinfo/boatanchors
> or, via email, send a message with subject or body
> 'help' to
> 	boatanchors-request at mailman.qth.net
> 
> You can reach the person managing the list at
> 	boatanchors-owner at mailman.qth.net
> 
> When replying, please edit your Subject line so it
> is more specific
> than "Re: Contents of Boatanchors digest..."
> 
> 
> Today's Topics:
> 
>    1. Re: Seeking National Radio Knobs (Todd,
> KA1KAQ)
>    2. Re: [Hallicrafters] Re: [Boatanchors]
> Hallicrafters
>       PS-500A-ACquestion??? (Jim Wilhite)
>    3. "Friends" (FRED - W4FJF)
>    4. RE: [Hallicrafters] Re: [Boatanchors]
>       HallicraftersPS-500A-ACquestion??? (Gary
> Schafer)
>    5. Re: "Keying" relay (Glen Zook)
>    6. Re: "Friends" (Jack Taylor)
>    7. Re: "Friends" (Todd, KA1KAQ)
>    8. Relay (W?QFC)
>    9. Re: Relay (w8au at sssnet.com)
>   10. COLLINS 180 L2 TUNER SCHEMATIC  (Greg Mijal)
>   11. 	For Sale: National, Heathkit, Test Equipment
> and Misc.
>       (David Hollander)
> 
> 
>
----------------------------------------------------------------------
> 
> Message: 1
> Date: Tue, 11 Apr 2006 08:59:54 -0400
> From: "Todd, KA1KAQ" <ka1kaq at gmail.com>
> Subject: Re: [Boatanchors] Seeking National Radio
> Knobs
> To: "StephenTetorka at cs.com" <StephenTetorka at cs.com>
> Cc: boatanchors at mailman.qth.net
> Message-ID:
> 
>
<9ccb8c510604110559w4fd893e8l39024816badf37c0 at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> On 4/10/06, StephenTetorka at cs.com
> <StephenTetorka at cs.com> wrote:
> > Hi all:
> >
> > Have a National Radio NC-81X that I restored last
> year..rare unit, I
> > believe...and getting ready to sell it...(
> inquiries invited, thank you)...to help pay
> > for my restoration on  my newly obtained 1984
> Suburban 'yachtmobile'...
> > Works great...however, only two knobs are there (
> fortunately, I have the
> > hardest two to find )...and I'd like to find the
> others....
> 
> Hi Steve -
> 
> You must own stock in Exxon/Mobil if you can afford
> to drive a boat
> like that! Good vehicles though, easy to fix and
> they run forever. And
> the best part, plenty of room to haul big iron.
> 
> I also have one of the NC-81X receivers, but the
> bakelite part of the
> knobs are brown, instead of black like most other
> National 'bar' type
> knobs. Somewhere in my cache of parts I do have some
> NOS bar knobs
> (black), but I've never seen brown ones available
> beyond those seen on
> the radios themselves. I *think* at least one other
> model beyond the
> 80/81 used these knobs, maybe the NC-200? Does your
> set still have
> brown knobs?
> 
> I'd like to find the main dial bezel/escutcheon for
> mine as the bottom
> outside edge is missing along with the dial glass.
> Other than that,
> it's in pretty good shape. Just need to find the
> speaker to go with
> it.
> 
> de Todd/'Boomer'  KA1KAQ
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Tue, 11 Apr 2006 08:27:35 -0500
> From: "Jim Wilhite" <w5jo at brightok.net>
> Subject: Re: [Hallicrafters] Re: [Boatanchors]
> Hallicrafters
> 	PS-500A-ACquestion???
> Cc: <boatanchors at mailman.qth.net>
> Message-ID: <000c01c65d6b$b211c270$0201a8c0 at Wilhite>
> Content-Type: text/plain; format=flowed;
> charset="iso-8859-1";
> 	reply-type=original
> 
> You are correct Ian provided the voltage of all
> series capacitors are the 
> same voltage value.  If one or more of are lower
> voltage rating, then the 
> lowest voltage in the string becomes the maximum
> voltage.
> 
> 73  Jim
> W5JO
> 
> 
> 
> 
> > Voltage does NOT halve.  Put 2 of them in parallel
> and YES, capacitance
> > doubles BUT voltage remains the SAME.
> >
> > Ian, K6SDE
> >
> 
> >
> > Hi Bill,
> >
> > .. If you put them in parallel, you will double
> the capacitance
> > and half the voltage rating.
> > ..
> >
> > 73,
> >
> > John,  W4AWM
> >
> 
> 
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Tue, 11 Apr 2006 13:58:04 GMT
> From: "FRED - W4FJF" <ka2hlw at netzero.net>
> Subject: [Boatanchors] "Friends"
> To: boatanchors at mailman.qth.net
> Message-ID:
>
<20060411.065848.19490.907744 at webmail10.lax.untd.com>
> Content-Type: text/plain
> 
> Rayfri,
>    Don't be so apologetic, it happens to us all. I
> had a friend offer an Amp Supply LA-1000 to me for
> $300.00 (shipping included). I considered it a done
> deal, but when I was ready to pay him for it, he
> backed out of the deal with no explaination. So much
> for a "friend". The amp would have been perfect for
> my Icom 751A, and my Navy MARS operations. So now
> the search begins again.....
>         TNX FM FRED - W4FJF/NNN0QAA REGION FOUR, 73
> AMATEUR RADIO IS A NATIONAL RESOURCE, NOT "JUST A
> HOBBY". NAVMARCORPSMARS MEMBER,"PROUDLY SERVING
> THOSE WHO SERVE".
> A FOOLS PARADISE IS A WISE MAN'S HELL.
> 
> 
> 
> ------------------------------
> 
> Message: 4
> Date: Tue, 11 Apr 2006 10:30:57 -0400
> From: "Gary Schafer" <garyschafer at comcast.net>
> Subject: RE: [Hallicrafters] Re: [Boatanchors]
> 	HallicraftersPS-500A-ACquestion???
> To: "'Jim Wilhite'" <w5jo at brightok.net>
> Cc: boatanchors at mailman.qth.net
> Message-ID:
> <20060411143143.B6250859C1F at mailman.qth.net>
> Content-Type: text/plain;	charset="us-ascii"
> 
> Jim,
> 
> Wouldn't the maximum voltage be: the voltage of the
> lowest voltage capacitor
> times the number of capacitors in the string?  :>)
> 
> 73
> Gary  K4FMX
> 
> > -----Original Message-----
> > bounces at mailman.qth.net] On Behalf Of Jim Wilhite
> > 
> > You are correct Ian provided the voltage of all
> series capacitors are the
> > same voltage value.  If one or more of are lower
> voltage rating, then the
> > lowest voltage in the string becomes the maximum
> voltage.
> > 
> > 73  Jim
> > W5JO
> > 
> > 
> > 
> > 
> > > Voltage does NOT halve.  Put 2 of them in
> parallel and YES, capacitance
> > > doubles BUT voltage remains the SAME.
> > >
> > > Ian, K6SDE
> > >
> > 
> > >
> > > Hi Bill,
> > >
> > > .. If you put them in parallel, you will double
> the capacitance
> > > and half the voltage rating.
> > > ..
> > >
> > > 73,
> > >
> > > John,  W4AWM
> > >
> > 
> > 
> > _______________________________________________
> > Boatanchors mailing list
> > Boatanchors at mailman.qth.net
> >
> http://mailman.qth.net/mailman/listinfo/boatanchors
> > ** List Administrator - Duane Fischer, W8DBF/W9WZE
> **
> > ** For Assistance: dfischer at usol.com **
> > $$ For vintage radio info, see the HCI web site $$
> > http://www.w9wze.org
> 
> 
> 
> 
> 
> ------------------------------
> 
> Message: 5
> Date: Tue, 11 Apr 2006 07:31:29 -0700 (PDT)
> From: Glen Zook <gzook at yahoo.com>
> Subject: Re: [Boatanchors] "Keying" relay
> To: "WØQFC" <erastber at tampabay.rr.com>,
> boatanchors at mailman.qth.net
> Message-ID:
> <20060411143129.30603.qmail at web52911.mail.yahoo.com>
> Content-Type: text/plain; charset=iso-8859-1
> 
> If you are using this to activate a linear, etc.,
> then
> you can get one from Radio Shack for under $10.
> 
> Glen, K9STH
> 
> --- WØQFC <erastber at tampabay.rr.com> wrote:
> 
> > Years ago I remember a small relay that had a
> > plastic cover. It was about 2" 
> > x 3" x 1" high.
> > I think that it was called a keying relay; well
> guys
> > & gals, I need one! One 
> > if it is s.p.d.t. or d.p.s.t. and two if it is
> > s.p.s.t.
> > 12v dc preferred, but any voltage ok.
> > Anything out there for sale or trade?
> > 
> > Gene, WØQFC
> > Spring Hill, Florida
> > WEB SITE:
> > http://www.w0qfc.com
> > 
> > _______________________________________________
> > Boatanchors mailing list
> > Boatanchors at mailman.qth.net
> >
> http://mailman.qth.net/mailman/listinfo/boatanchors
> > ** List Administrator - Duane Fischer, W8DBF/W9WZE
> > **   
> > ** For Assistance: dfischer at usol.com **         
> > $$ For vintage radio info, see the HCI web site $$
>  
> >    
> > http://www.w9wze.org    
> > 
> > 
> 
> 
> Glen, K9STH
> 
> Web sites
> 
> http://home.comcast.net/~k9sth
> http://home.comcast.net/~zcomco
> 
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam
> protection around 
> http://mail.yahoo.com 
> 
> 
> ------------------------------
> 
> Message: 6
> Date: Tue, 11 Apr 2006 07:57:24 -0700
> From: "Jack Taylor" <jack at n7oo.com>
> Subject: Re: [Boatanchors] "Friends"
> To: <boatanchors at mailman.qth.net>
> Message-ID: <005501c65d78$40271680$0200a8c0 at acme>
> Content-Type: text/plain;	charset="iso-8859-1"
> 
> Doesn't Navy MARS have an excess property program? 
> HF amps DO show up
> surplus
> from time to time.
> 
> 73 de Jack  -  N7OO
> 
> ----- Original Message ----- 
> From: "FRED - W4FJF" <ka2hlw at netzero.net>
> To: <boatanchors at mailman.qth.net>
> Sent: Tuesday, April 11, 2006 6:58 AM
> Subject: [Boatanchors] "Friends"
> 
> 
> Rayfri,
>    Don't be so apologetic, it happens to us all. I
> had a friend offer an Amp
> Supply LA-1000 to me for $300.00 (shipping
> included). I considered it a done
> deal, but when I was ready to pay him for it, he
> backed out of the deal with
> no explaination. So much for a "friend". The amp
> would have been perfect for
> my Icom 751A, and my Navy MARS operations. So now
> the search begins
> again.....
>         TNX FM FRED - W4FJF/NNN0QAA REGION FOUR, 73
> AMATEUR RADIO IS A NATIONAL RESOURCE, NOT "JUST A
> HOBBY". NAVMARCORPSMARS
> MEMBER,"PROUDLY SERVING THOSE WHO SERVE".
> A FOOLS PARADISE IS A WISE MAN'S HELL.
> 
> 
> 
> 
> ------------------------------
> 
> Message: 7
> Date: Tue, 11 Apr 2006 11:18:41 -0400
> From: "Todd, KA1KAQ" <ka1kaq at gmail.com>
> Subject: Re: [Boatanchors] "Friends"
> To: "Jack Taylor" <jack at n7oo.com>
> Cc: boatanchors at mailman.qth.net
> Message-ID:
> 
>
<9ccb8c510604110818r77ffbd66y532c78c22f2d4bb5 at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
> 
> On 4/11/06, Jack Taylor <jack at n7oo.com> wrote:
> > Doesn't Navy MARS have an excess property program?
>  HF amps DO show up
> > surplus
> > from time to time.
> 
> The last surplus property I saw coming out of Army
> MARS about 10-15
> years ago were some old PCs with something like the
> 8808 for a
> processor. Absolute doorstops, even then. They also
> changed
> accountability from 3-5 years to lifetime around the
> same time. I did
> see some FRC-93 Collins gear surplussing out through
> the AF MARS
> program around the same time, but much of it was
> left sitting because
> it was out west (Utah or Nevada I think)and no one
> wanted to go get
> it.
> 
> It would certainly be interesting to see what kind
> of gear has come
> available through the MARS programs over the last
> decade. Sadly, the
> days of R-390s and T-368s galore are long gone. Even
> when they closed
> down Plattsburgh AFB in the 90s, they seemed to
> favor auctioning for
> scrap over surplussing. At the time, a ton of mixed
> metal was worth
> about $49. Large commercial dumpsters full of
> scopes, analyzers, and
> anything else with gold pin connectors chopped out
> and the rest
> heaved.
> 
> de Todd/'Boomer'  KA1KAQ (formerly AAR1HO)
> 
> 
> ------------------------------
> 
> Message: 8
> Date: Tue, 11 Apr 2006 14:41:03 -0400
> From: W?QFC <erastber at tampabay.rr.com>
> Subject: [Boatanchors] Relay
> To: <boatanchors at mailman.qth.net>
> Message-ID: <006b01c65d97$7c982b30$1e02a8c0 at dell>
> Content-Type: text/plain;	charset="iso-8859-1"
> 
> I guess I should have been more specific about what
> type of relay I needed.
> It needs to be low current and high speed as it is
> used to key the TX & VFO 
> from the Brass Racer or the bug.
> The relay(s) need to be either 1 relay with d.p.s.t.
> contacts or 2 relays 
> with s.p.s.t. contacts.
> One of the list members (I forgot who) was nice
> enough to send me two small 
> reed relays, but this dumb s**t fried them, so I
> have to start again.
> All I am going to do is to parallel the Brass Racer
> and the bug jax and put 
> the two jax in series with one leg of the relay
> coil(s).
> I tried one of the Radio Shack small pc mount relays
> but it generated too 
> much noise in the sidetone oscillator.
> Any help will be appreciated and many thanks to all
> that have already 
> responded.
> 
> 73 to all
> Gene, WØQFC
> Spring Hill, Florida
> WEB SITE:
> http://www.w0qfc.com
> 
> 
> 
> ------------------------------
> 
> Message: 9
> Date: Tue, 11 Apr 2006 14:59:44 -0400
> From: w8au at sssnet.com
> Subject: Re: [Boatanchors] Relay
> To: W?QFC <erastber at tampabay.rr.com>,
> <boatanchors at mailman.qth.net>
> Message-ID:
> <6.2.1.2.0.20060411145623.02d08110 at mail.sssnet.com>
> Content-Type: text/plain; charset="iso-8859-1";
> format=flowed
> 
> At 02:41 PM 4/11/06, WØQFC wrote:
> >It needs to be low current and high speed as it is
> used to key the TX & 
> >VFO from the Brass Racer or the bug.
> >The relay(s) need to be either 1 relay with
> d.p.s.t. contacts or 2 relays 
> >with s.p.s.t. contacts.
> 
> Remember the W9TO keyer?  It and other early
> versions used the
> mercury whetted relays.  Very fast.  They were a bit
> bigger than
> what you're looking for, but they were also made in
> 7 and 9 pin
> miniature sizes.   C.P.Clare was one of the mfr's...
> 
> w8au 
> 
> 
> 
> ------------------------------
> 
> Message: 10
> Date: Tue, 11 Apr 2006 11:57:25 -0700
> From: "Greg Mijal" <bluebirdtele at earthlink.net>
> Subject: [Boatanchors] COLLINS 180 L2 TUNER
> SCHEMATIC 
> To: <collins at listserve.com>
> Cc: Boatanchors at mailman.qth.net
> Message-ID:
> <000c01c65d99$c7a1ffa0$befbcbd8 at gregmija>
> Content-Type: text/plain;	charset="iso-8859-1"
> 
> Still looking for a copy of the 180L2 antenna tuner.
> Anyone out there ?
> Greg
> 
> 
> ------------------------------
> 
> Message: 11
> Date: Tue, 11 Apr 2006 19:39:35 -0700
> From: David Hollander <n7rk at cox.net>
> Subject: [Boatanchors] 	For Sale: National,
> Heathkit, Test Equipment
> 	and Misc.
> To: Boatanchors <boatanchors at sco.theporch.com>,
> 	"BOATANCHORS at LISTSERV.TEMPE.GOV"
> <BOATANCHORS at LISTSERV.TEMPE.GOV>,
> 	boatanchors at mailman.qth.net, National
> <national at mailman.qth.net>,
> 	Heathkit <HEATH at LISTSERV.TEMPE.GOV>,	Forsale-Swap
> Net
> 	<forsale-swap at mailman.qth.net>,	Discussion of AM
> Radio
> 	<amradio at mailman.qth.net>
> Message-ID: <443C6867.8090307 at cox.net>
> Content-Type: text/plain; charset=windows-1252;
> format=flowed
> 
> Here are some items for sale.  Prices do not include
> shipping.  I will 
> ship overseas.
> 
> Heathkit Model AM-2 Reflected Power and SWR
> Bridge.....$30 plus shipping
> Super clean and tested. Includes a photocopy of the
> manual
> http://members.cox.net/radiodx3/heatham2.JPG
> http://members.cox.net/radiodx3/heatham22.JPG
> 
> Rare” National Radio NC-45.............$150 plus
> shipping
> This is an 8 tube receiver made from 1941-1945
> covering 550 kHz to 30 
> MHz. Most models made were made the NC-45 which is
> an ac/dc receiver. 
> The NC-45A has a transformer operated power supply.
> This radio does work 
> and receives signals on all bands but it really need
> to be recapped and 
> aligned. Cosmetically OK but also needs to be
> cleaned up. It has all of 
> the correct knobs and I do not find any extra holes.
>  The insides look 
> good. One interesting thing that I noticed is that
> the main tuning and 
> bandspread knobs are both weighted, rather heavy and
> appear to have come 
> from the factory that way. I do not have a manual
> but they are available 
> from several sources on the web. I will include a
> schematic.
> http://members.cox.net/radiodx3/nc45rcvr.JPG
> http://members.cox.net/radiodx3/nc45rcvr4.JPG
> http://members.cox.net/radiodx3/nc45rcvr6.JPG
> 
> Triad N-54M Isolation Transformer (150
> VA)..............$30 plus shipping
> http://members.cox.net/radiodx5/triadiso_xfmr.JPG
> http://members.cox.net/radiodx5/triadiso_xfmr2.JPG
> 
> Steel Project Enclosure for Transmitter or
> Receiver....$15 plus shipping
> A steel box which would make a nice enclosure for a
> hombrew receiver, 
> transmitter or antenna coupler. The dimensions are
> 15 inches wide by 9 
> inches high by 11.5 inches deep. Their are no dents
> or dings, it just 
> needs a cleaning.
> http://members.cox.net/radiodx3/box2.JPG
> 
> Astron RS-12 Power Supply.........$35 plus shipping
> 12 amp 13.8 volt dc power supply. This is a tested,
> working power supply 
> in excellent condition.
> http://members.cox.net/radiodx3/astron_rs12.JPG
> http://members.cox.net/radiodx3/astron_rs122.JPG
> 
> Hewlett Packard HP 400D AC Vacuum Tube
> Voltmeter...........$30 plus shipping
> This is a tested, working unit in nice condition. It
> could use a 
> calibration. Includes a copy of the manual on CD.
> http://members.cox.net/radiostuff9/hp400d.jpg
> 
> General Electric YGA-4 Audio Oscillator.........$25
> plus shipping
> This has been tested and is a working unit.
> http://members.cox.net/radiodx3/ge_audiogen.JPG
> http://members.cox.net/radiodx3/ge_audiogen2.JPG
> 
> Repco RSB Desktop Station Power Supply with
> Speaker............$30 plus 
> shipping
> This is a 13.8 volt, 15 amp power supply and speaker
> with room on the 
> top for mounting your radio.
> This has been tested and is working. Speaker sounds
> good too.
> http://members.cox.net/radiostuff9/base_ps.jpg
> http://members.cox.net/radiostuff9/base_ps2.jpg
> 
> Sylvania Electric Type 134 Polymeter VTVM...$20 plus
> shipping
> The unit is working but needs calibration on the
> resistance scales. It 
> has the capability of measuring RF voltage. It does
> not include test 
> leads or a manual. Manuals are available from a
> number of sources on the 
> Internet.
> http://members.cox.net/radiostuff9/sylvania_vtvm.JPG
> 
> Allied Knight Meter - new in the
> box..............$15 plus shipping
> http://members.cox.net/radiodx3/knight_meter.JPG
> http://members.cox.net/radiodx3/knight_meter2.JPG
> 
> Emico 0-30 mA Meter new in the box........$10 plus
> shipping
> Used on some boatanchor transmitters
> http://members.cox.net/radiodx3/emico0_30.JPG
> 
> 73 and thanks for looking.
> -- 
>
***********************************************************
> Dave  N7RK          Boatanchors Home Page:
> http://members.cox.net/n7rk
> Phoenix, Arizona         *DXCC Honor Roll*   
> *WAZ#22 - 75 Meter SSB*
> 
> ex-XE2/N7RK, N7RK/ZB2, VK2ERK, ZM0AJN, WB6NRK,
> WN6IWX
> 
> Boatanchor and Antique Radio Collector
> 
> 
> 
> 
> ------------------------------
> 
> _______________________________________________
> Boatanchors mailing list
> Boatanchors at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/boatanchors
> ** List Administrator - Duane Fischer, W8DBF/W9WZE
> **   
> ** For Assistance: dfischer at usol.com **         
> $$ For vintage radio info, see the HCI web site $$  
>    
> http://www.w9wze.org    
> 
> 
> 
> End of Boatanchors Digest, Vol 27, Issue 15
> *******************************************
> 



More information about the Boatanchors mailing list