[Boatanchors] Boatanchors Digest, Vol 114, Issue 6

Thu Jul 4 17:57:17 EDT 2013

Hi guys. I did subscribe to the Swan Group on Yahoo yesterday.... Of course, the first looong posting I tried bounced... Ah, well.

Here's what I think is the root of my problem, please bear with me:

I have 2 nice Swan 250Cs (I know, I know). Both receive excellent, and exactly the same, when using my HP 606A SG. One has NO xmit output. I have discovered this is a common problem with these radios.

Not being an x-spurt on xtal filters, I measured the in-circuit resistance of the xtal filters.
The 'good' radio measures 300K ohms. The 'bad' radio measures 36M ohms. I got to this point by 'scoping the signal. Very little carrier balance seen on the scope. The manual is very cryptic on xmitter alignment.

Since the local Radio Shack is out of Swan IF Filters...... I just can't understand why both receivers are exactly the same, but no xmit. The block diagram shows a signal path through the IF Filter???? Yeah, I can swap them, but I need to understand the problem......

Strange, indeed........

thank you,

ron
N4UE

-----Original Message-----
From: boatanchors-request <boatanchors-request at mailman.qth.net>
To: boatanchors <boatanchors at mailman.qth.net>
Sent: Thu, Jul 4, 2013 5:17 pm
Subject: Boatanchors Digest, Vol 114, Issue 6

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Today's Topics:

   1. Re: Eico 950B question (Richard Knoppow)
   2. Re: Swan 250C tough problem (Raymond Cote)

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

Message: 1
Date: Tue, 2 Jul 2013 19:34:14 -0700
From: "Richard Knoppow" <1oldlens1 at ix.netcom.com>
To: "Brian Harris" <cosmophone at yahoo.com>
Cc: Boatanchors <Boatanchors at mailman.qth.net>
Subject: Re: [Boatanchors] Eico 950B question
Message-ID: <C111B12EE4CF46C184C115BF44FC8B53 at VALUED20606295>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
	reply-type=original

----- Original Message ----- 
From: "Brian Harris" <cosmophone at yahoo.com>
To: "Richard Knoppow" <1oldlens1 at ix.netcom.com>
Cc: <k4oah at mindspring.com>; "Boatanchors" 
<Boatanchors at mailman.qth.net>
Sent: Tuesday, July 02, 2013 6:37 PM
Subject: Re: [Boatanchors] Eico 950B question

Richard,

By now you realize the bridge is working as it should.  One 
to be careful with is when you test large caps at higher 
voltages.   When you are through with the test turn the 
voltage down slowly rather than rapidly slamming it to zero 
because if you the cap will be discharging into a very low 
resistance (the wiper to the ground end of the pot) which 
will fry the end of the pot.

     Thats good to know. I am a little surprised the thing 
works. I get good sharp indications from the magic eye tube. 
I would hate to fry it.

--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com 

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

Message: 2
Date: Wed, 3 Jul 2013 01:02:58 -0500
From: Raymond Cote <bluegrassdakine at hotmail.com>
To: Dave Harmon <k6xyz at sbcglobal.net>
Cc: "boatanchors at mailman.qth.net" <boatanchors at mailman.qth.net>
Subject: Re: [Boatanchors] Swan 250C tough problem
Message-ID: <BAY404-EAS64A9D475006901F7844810A9730 at phx.gbl>
Content-Type: text/plain; charset="us-ascii"

Ditto I ha a couple Swans so I am also interested I. Following step by step. 
Ray

"During times of universal deceit, telling the truth becomes a revolutionary 
act." George Orwell

On Jul 2, 2013, at 18:23, "Dave Harmon" <k6xyz at sbcglobal.net> wrote:

+1 for that Jim......or N4UE, take the request to the Swan list.
I'm familiar with the 240 so you might just tell us what the problem
is.....might get lucky!

Dave Harmon
K6XYZ[at]sbcglobal[dot]net
Sperry, Ok.

-----Original Message-----
From: boatanchors-bounces at mailman.qth.net
[mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of Jim Wilhite
Sent: Tuesday, July 02, 2013 4:36 PM
To: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Swan 250C tough problem

Ron, I won't speak for others but I would like to follow your progress so 
consider keeping the discussion here.   Maybe someone who reads the digest 
won't see your message for over a week and would have great knowledge to
share with the group.

I know very little about Swan Radios so this would be nice to read.

Jim
W5JO

----- Original Message ----- 
> 
> I don't want to tie up the reflector with a bunch of tech-babble, so I 
> would ask anyone that has an intimate knowledge of these radios to 
> contact me off line to discuss.
> 
> n4ue at arrl.net
> 
> or
> 
> bonddaleena at aol.com
> 
> All replies will be appreciated and answered.
> 
> Oh, both radios receive identical !!!
> 
> thank you!!

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End of Boatanchors Digest, Vol 114, Issue 6
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