[600MRG] 600MRG Digest, Vol 65, Issue 23

Mon Sep 26 10:15:05 CDT 2016

Rudy,

Have you considered contacting ship museums which may want the receiver for their restoration work?

Mike N2MS 

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Message: 2
Date: Sun, 25 Sep 2016 11:07:47 -0700
From: "Rudy Severns" <n6lf at epud.net>
To: "600MRG" <600mrg at w7ekb.com>
Subject: [600MRG] Rx and stuff
Message-ID: <001101d21757$b9527c30$2bf77490$@net>
Content-Type: text/plain;	charset="us-ascii"

I wanted to be clear, the stuff I'm offering is free to the LF/MF gang and
that includes VE's.  I'm just not generous enough to do a lot of packing,
especially the big receivers.   I'm right on I5 just south of Eugene, OR.  

Now if you can con someone more local to me than you to come by and ship it
to you, that's ok too.

Right now I'm busy erecting the three element 160m transmitting array I
brought with me from the last QTH.  Not all that hard but endless hours of
fiddling and laying out radials.

73, Rudy

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Message: 3
Date: Sun, 25 Sep 2016 15:14:13 -0400
From: Bill Cromwell <wrcromwell at gmail.com>
To: 600mrg at w7ekb.com
Subject: Re: [600MRG] 600MRG Digest, Vol 65, Issue 22
Message-ID: <69ecbf71-76ca-c144-b2dc-68440e67511d at gmail.com>
Content-Type: text/plain; charset=windows-1252; format=flowed

Hi Dave,

It doesn't go 'through' the BC band but stops just inside the low end of 
that band. Mine still has the tubes but I'm thinking of building FET 
circuits on plug-in bases (and disconnecting B+). I am also thinking of 
running the tubes on batteries like I do with my command receivers (same 
tube count).

Mine is nice to use, too. I suspect they all are :)

73,

Bill  KU8H

On 09/25/2016 01:45 PM, Dave Riley wrote:
> re: boat anchors
>
> Have a like new RAK but added fet to each tube base, watta mechanical 
> delight this thing is...
>
> I find prime surplus rigs like these to be a great new house to a 
> lowfer or 600m project..
>
> This RAK has  added bnc connectors just to be a tuned, very selective, 
> 'pre-amp'
>
> Otherwise makes great receiver from about 15 kc. through broadcast 
> band...
>
> Ran a 9V battery down in one week!!!
>
> This one will soon house an entire MF station in the original case...
>
> TNX for the ideas...  DaveR /17
>
>
> On 9/25/2016 1:00 PM, 600mrg-request at w7ekb.com wrote:
>>
>>     1. LF boat anchor receivers (Rudy Severns)
>>     2. Re: LF boat anchor receivers (Kenneth G. Gordon)
>>
>>
>>
>
>
> _______________________________________________
> 600MRG mailing list
> 600MRG at w7ekb.com
> http://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com
>

-- 
bark less - wag more

------------------------------

Message: 4
Date: Sun, 25 Sep 2016 15:17:56 -0400
From: Bill Cromwell <wrcromwell at gmail.com>
To: 600mrg at w7ekb.com
Subject: Re: [600MRG] Rx and stuff
Message-ID: <b86e3b19-29d4-8a75-b236-9062959e5525 at gmail.com>
Content-Type: text/plain; charset=windows-1252; format=flowed

Hi Rudy,

Anybody in your area I know that would ship that RAL would pick it up 
for their own use. Another one that got away. I am starting construction 
on a RAL inspired, homebrew receiver.

Endless hours of fiddling...the devil is always in the details. Good 
luck with your antenna.

73,

Bill  KU8H

On 09/25/2016 02:07 PM, Rudy Severns wrote:
> I wanted to be clear, the stuff I'm offering is free to the LF/MF gang and
> that includes VE's.  I'm just not generous enough to do a lot of packing,
> especially the big receivers.   I'm right on I5 just south of Eugene, OR.
>
>   
>
> Now if you can con someone more local to me than you to come by and ship it
> to you, that's ok too.
>
>   
>
> Right now I'm busy erecting the three element 160m transmitting array I
> brought with me from the last QTH.  Not all that hard but endless hours of
> fiddling and laying out radials.
>
>   
>
> 73, Rudy
>
>   
>
>   
>
> _______________________________________________
> 600MRG mailing list
> 600MRG at w7ekb.com
> http://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com
>

-- 
bark less - wag more

------------------------------

Message: 5
Date: Sun, 25 Sep 2016 15:58:23 -0700
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: 600mrg at w7ekb.com
Subject: Re: [600MRG] RAK
Message-ID: <57E8568F.29821.4C55DDC at kgordon2006.frontier.com>
Content-Type: text/plain; charset=US-ASCII

I am not sure you folks are aware of this, but not only is the RAK/RAL a delight from a 
mechanical standpoint, but the RAK is so selective that the "other side of zero beat" simply 
doesn't exist in those receivers when they are correctly aligned.

It exhibits true "single-signal selectivity"....from a TRF!!!

Amazing!!!

If you ever get a chance, take a close look at the coils: all are doughnut shaped: they are 
toroids, wound with very fine Litz wire. Their "Q" must be incredible.

Ken W7EKB

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Message: 6
Date: Sun, 25 Sep 2016 20:15:54 -0700
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: "D.J.J. Ring, Jr." <n1ea at arrl.net>
Cc: 600mrg at w7ekb.com
Subject: Re: [600MRG] RAK
Message-ID: <57E892EA.11157.5B11E95 at kgordon2006.frontier.com>
Content-Type: text/plain; charset=US-ASCII

On 25 Sep 2016 at 22:42, D.J.J. Ring, Jr. wrote:

> 
> Hi Ken,
> 
> Any chance of getting a recording of something interesting on the RAK?

Not at this location: noise here is really terrible. I am thinking of taking an RAK out into the 
field and running it on batteries. I'm not sure what to use for an antenna there though, 
although I do have some beautiful 36" loops with big wooden tripods to mount them on.

> It sounds absolutely fabulous!

Well, I sure like them;.

> Too bad the maritime stations aren't there but maybe you will hear VK5BUG, Doc - he's got 
> 3,000 miles with CW from his location.

We used to copy NWC down in Oz on RAKs in Missoula, Montana back in the 1970s, but 
that station has been long gone, unfortunately. Also, of course, NWC ran several hundred 
thousand watts output as I remember it. We copied NWC 24/7/365 then.

Ken W7EKB

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------------------------------

Message: 7
Date: Mon, 26 Sep 2016 00:06:25 -0700
From: "w7aln at netzero.com" <w7aln at netzero.com>
To: "600mrg-request at w7ekb.com" <600mrg-request at w7ekb.com>,
	"600mrg at w7ekb.com" <600mrg at w7ekb.com>
Cc: Joe Brown <joebrownhere at gmail.com>
Subject: Re: [600MRG] 600MRG Digest, Vol 65, Issue 22
Message-ID: <q9snq0c8nnl7hg49qne0nqrh.1474873585384 at email.lge.com>
Content-Type: text/plain;   charset=utf-8

Sent from my Verizon 4G LTE Smartphone
------ Original message------From: 600mrg-request at w7ekb.comDate: Sun, Sep 25, 2016 10:00 AMTo: 600mrg at w7ekb.com;Cc: Subject:600MRG Digest, Vol 65, Issue 22
Send 600MRG mailing list submissions to600mrg at w7ekb.comTo subscribe or unsubscribe via the World Wide Web, visithttp://w7ekb.com/mailman/listinfo/600mrg_w7ekb.comor, via email, send a message with subject or body 'help' to600mrg-request at w7ekb.comYou can reach the person managing the list at600mrg-owner at w7ekb.comWhen replying, please edit your Subject line so it is more specificthan "Re: Contents of 600MRG digest..."Today's Topics:   1. LF boat anchor receivers (Rudy Severns)   2. Re: LF boat anchor receivers (Kenneth G. Gordon)----------------------------------------------------------------------Message: 1Date: Sat, 24 Sep 2016 13:56:14 -0700From: "Rudy Severns" To: "600MRG" <600mrg at w7ekb.com>Subject: [600MRG] LF boat anchor receiversMessage-ID: <000001d216a6$16e5b220$44b11660$@net>Content-Type: text/plain;charset="us-ascii"To those LF/MF ops within driving distance to Eugene, OR. I have a collection of very old LF/MF navy receivers (WWII) some of whichactually work.  I do not need more than one sample of each but I have somemultiples which I would be happy to give to those willing to pick them up(60-80 lb each!): 1)      RBL 22)      RBL63)      RBA4)      HF mate to RBL5)      RAL 7, HF mate to RAK6)      BC3487)      RAS It's time for me to clean house and I have other stuff like large aircapacitors, RF ammeters, etc, which could be very useful for an LF/MFstation.  I would be happy to send these to a good home. Contact me off the reflector. 73, Rudy N6LF, WD2XSH/20------------------------------Message: 2Date: Sat, 24 Sep 2016 14:57:26 -0700From: "Kenneth G. Gordon" To: 600MRG at w7ekb.comSubject: Re: [600MRG] LF boat anchor receiversMessage-ID: <57E6F6C6.10705.437882B at kgordon2006.frontier.com>Content-Type: text/plain; charset=US-ASCIIOn 24 Sep 2016 at 13:56, Rudy Severns wrote:> To those LF/MF ops within driving distance to Eugene, OR.> > I have a collection of very old LF/MF navy receivers (WWII) some of which> actually work.  I do not need more than one sample of each but I have some> multiples which I would be happy to give to those willing to pick them up> (60-80 lb each!):> > 1)      RBL 2> > 2)      RBL6For those who don't know, the RBL series were VLF receivers covering 15 through 600 kHz, designed by National which have direct-frequency readout dials and good filters. They have a built-in 110 VAC supply. The circuit type is TRF with 2 RF amplifiers (6SK7s), a regenerative detector (6SK7), 2 stages of audio amplification, (6SG7, 6K6) and an audio limiter (6H6). Rectifier is a 5Y3. They are very robust receivers and work well. > 3)      RBAThis is possibly the last TRF designed by RCA and is considered the peak of the VLF TRF receiver design. It can use the same power supply as the RBB and RBC recievers. It has 3 RF amplifiers, the third of which is operated at very low plate and screen voltages (15V) so that it operates as a limiter. This last stage also has an input to it from a local heterodyne oscillator operating 1 kHz from the operating frequency and tuned with it. The output of the 3rd RF amp then feeds a triode plate detector. This is followed by a 1st audio amp, an audio limiter, and an audio output stage which is designed to feed from 1 to 20 sets of headphones.  > 4)      HF mate to RBL> > 5)      RAL 7, HF mate to RAKI consider the RAL-7, also designed by RCA, to be the finest HF TRF receiver I have ever known. It covers from 300 kHz through 23 MHz. I used one for at least 12 years as my only station receiver. It uses the older 6 pin tubes, has 2 RF amp stages, a regen detector, 2 stages of audio and an "audio AGC" which is basically a limiter. It is unusually stable, very sensitive, and very selective for a TRF. It has a very wide-ranged switchable (to frequency) audio filter system.I have photos of some of these receivers on my website at:http://www.w7ekb.com/glowbugs/BA/index.html> 6)      BC348My first GOOD station receiver. A very fine piece of equipment> 7)      RASA National "HRO" type of receiver using plug-in coils, but with an IF of 175 kHz. An excellent receiver for the lower bands. Its 175 kHz IF does not produce good image rejection on the higher bands.Manuals for all of the above arfe available from http://bama.edebris.com/manuals/ under Military.> It's time for me to clean house and I have other stuff like large air> capacitors, RF ammeters, etc, which could be very useful for an LF/MF> station.  I would be happy to send these to a good home.> > Contact me off the reflector.> > 73, Rudy N6LF, WD2XSH/20Thanks, Rudy. Ken W7EKB---This email has been checked for viruses by Avast antivirus software.https://www.avast.com/antivirus------------------------------Subject: Digest Footer_______________________________________________600MRG mailing list600MRG at w7ekb.comhttp://w7ekb.com/mailman/listinfo/600mrg_w7ekb.com------------------------------End of 600MRG Digest, Vol 65, Issue 22**************************************

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End of 600MRG Digest, Vol 65, Issue 23
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