[R-390] RE: R-390 Digest, Vol 27, Issue 8

Craig Anderson Ext 1365 Craig.Anderson at saintpaul.edu
Fri Jul 14 13:29:57 EDT 2006 

I use RG-316/U and it works just fine. The outside dia. is .098

W9CLA

-----Original Message-----
From: r-390-bounces at mailman.qth.net
[mailto:r-390-bounces at mailman.qth.net] On Behalf Of
r-390-request at mailman.qth.net
Sent: Friday, July 14, 2006 3:03 AM
To: r-390 at mailman.qth.net
Subject: R-390 Digest, Vol 27, Issue 8

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. RF Coaxial Cables (n4buq at knology.net)
   2. Re: RF Coaxial Cables (n4buq at knology.net)
   3. Re: RF Coaxial Cables (n4buq at knology.net)
   4. Re: RF Coaxial Cables (n4buq at knology.net)


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

Message: 1
Date: 13 Jul 2006 20:05:55 -0000
From: "n4buq at knology.net" <n4buq at knology.net>
Subject: [R-390] RF Coaxial Cables
To: r-390 at mailman.qth.net
Message-ID: <20060713200555.529.qmail at webmail4.knology.net>
Content-Type: text/plain; charset=iso-8859-1

A few months ago, I started looking for some suitable cable to replace
the 
output coax from my PTO as well as the other RF connections to the IF
deck 
and crystal deck.  These have gotten rather worn in my radios and worry
me 
every time I start fooling with them.  They may be electrically okay for

now, but with the jacket being broken in a few places, it makes the
cable 
kind of weak in those areas and I'm constantly worried about the inner 
jacket failing at those same weak points.

I finally found something that looks to be a perfect fit.  Some have 
suggested using RG178, but its OD is typically 0.072" or smaller and, as

such, the clamp in the PTO won't grab on the jacket of the coax.  I made
it 
work with a little shrink tubing, but wasn't really satisfied with it.  
Besides, RG178 is a bit small looking to be a replacement for the
original 
cable.

Some have suggested RG174 but with an OD of 0.100" or greater, it won't
fit 
in the various connectors.

The original cable's OD is about 0.084" and the coax I have is about
0.083" 
so it should work just fine.  It is PTFE (Teflon(r)) inside and out with

silver-plated braid and inner conductor so it should be a very nice 
replacement cable.

I stumbled across this on eBay and the fellow is selling another lot of
it 
so if you're interested I can point you to the auction.  I don't know
how 
much of it he has in stock, but I've emailed him to see.

Also, if anyone's interested, I may sell some of mine.  I had to buy 25'

and don't plan using all of it, but I don't know if/how much I'll have
left.

I'm just happy to finally have a good cable and hope I can get all of
them 
replaced.  The ones in my Motorola are quite ratty.

Regards,

Barry - N4BUQ


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

Message: 2
Date: 13 Jul 2006 20:58:54 -0000
From: "n4buq at knology.net" <n4buq at knology.net>
Subject: Re: [R-390] RF Coaxial Cables
To: DW Holtman <future212 at comcast.net>
Cc: r-390 at mailman.qth.net
Message-ID: <20060713205854.22309.qmail at webmail4.knology.net>
Content-Type: text/plain; charset=iso-8859-1


On Thu, 13 Jul 2006 14:43:11 -0600, DW Holtman <future212 at comcast.net> 
wrote :

> Barry,
> 
> Do you have new connectors, or you going to re-use the old ones? I'm a

> little nervous about re-using the old connectors. If I screw one up, I

> don't think I would ever find a replacement. The R-391 that I'm
working 
> on now, like the R-390 uses standard BNC connectors I wish they had 
> stuck to the BNC's. I guess if push came to shove, I could put BNC 
> female connectors in, but it would have to be a dire situation for me
to 
> modify the sheet metal in the the RF amp and If Amps.
> 
> Any information on how you are going to do the connectors would be 
> greatly appreciated.
> 
> best,
> DW Holtman
> WB7SSN
> 
> 
> n4buq at knology.net wrote:
> 
> >A few months ago, I started looking for some suitable cable to
replace 
the 
> >output coax from my PTO as well as the other RF connections to the IF

deck 
> >and crystal deck.  These have gotten rather worn in my radios and
worry 
me 
> >every time I start fooling with them.  They may be electrically okay
for 
> >now, but with the jacket being broken in a few places, it makes the 
cable 
> >kind of weak in those areas and I'm constantly worried about the
inner 
> >jacket failing at those same weak points.
> >
> >I finally found something that looks to be a perfect fit.  Some have 
> >suggested using RG178, but its OD is typically 0.072" or smaller and,
as 
> >such, the clamp in the PTO won't grab on the jacket of the coax.  I
made 
it 
> >work with a little shrink tubing, but wasn't really satisfied with
it.  
> >Besides, RG178 is a bit small looking to be a replacement for the 
original 
> >cable.
> >
> >Some have suggested RG174 but with an OD of 0.100" or greater, it
won't 
fit 
> >in the various connectors.
> >
> >The original cable's OD is about 0.084" and the coax I have is about 
0.083" 
> >so it should work just fine.  It is PTFE (Teflon(r)) inside and out
with 
> >silver-plated braid and inner conductor so it should be a very nice 
> >replacement cable.
> >
> >I stumbled across this on eBay and the fellow is selling another lot
of 
it 
> >so if you're interested I can point you to the auction.  I don't know

how 
> >much of it he has in stock, but I've emailed him to see.
> >
> >Also, if anyone's interested, I may sell some of mine.  I had to buy
25' 
> >and don't plan using all of it, but I don't know if/how much I'll
have 
left.
> >
> >I'm just happy to finally have a good cable and hope I can get all of

them 
> >replaced.  The ones in my Motorola are quite ratty.
> >
> >Regards,
> >
> >Barry - N4BUQ

The connectors aren't a big deal.  I resoldered one on my first radio
and 
will resolder this one.  The hardest part is opening the back of the 90-
degree connectors.  Some of them don't like to come apart.  You can 
sometimes heat them up with a larger soldering iron and tap them on the 
workbench (wear protective eyewear when doing thas as the solder can and

will splatter).  This one was stubborn and a rather tight fit without
the 
solder.  I had to resort to a broken dental pick and heat to get it out.

Once you have it apart, the shield is a mechanical connection with a
little 
compression thingee and the center conductor solders to either a pin (in

the case of the 90-deg connector) or (and I'm assuming this) the center
of 
the male connector much like a standard BNC connector.

If you do tear one up, though, I believe Fair Radio still sells them.

Good luck,

Barry - N4BUQ


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

Message: 3
Date: 13 Jul 2006 21:00:44 -0000
From: "n4buq at knology.net" <n4buq at knology.net>
Subject: Re: [R-390] RF Coaxial Cables
To: "James A. (Andy) Moorer <jamminpower"@earthlink.net
Cc: r-390 at mailman.qth.net
Message-ID: <20060713210044.22916.qmail at webmail4.knology.net>
Content-Type: text/plain; charset=iso-8859-1

The link is:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=160006496498


On Thu, 13 Jul 2006 16:56:36 -0400, "James A. \(Andy\) Moorer" 
<jamminpower at earthlink.net> wrote :

> I'd like the eBay reference.
> Thanks a bunch!
> 
> Hmm - I don't want to get into a bidding war with others on this list.
We 
> should make a conspiracy and divide up the spoils.
> 
> James A. (Andy) Moorer
> www.jamminpower.com
> 
> ----- Original Message ----- 
> 
> >A few months ago, I started looking for some suitable cable to
replace 
the
> > output coax from my PTO as well as the other RF connections to the
IF 
deck
> > and crystal deck.  These have gotten rather worn in my radios and
worry 
me
> > every time I start fooling with them.  They may be electrically okay
for
> > now, but with the jacket being broken in a few places, it makes the 
cable
> > kind of weak in those areas and I'm constantly worried about the
inner
> > jacket failing at those same weak points.
> >
> > I finally found something that looks to be a perfect fit.  Some have
> > suggested using RG178, but its OD is typically 0.072" or smaller
and, as
> > such, the clamp in the PTO won't grab on the jacket of the coax.  I 
made 
> > it
> > work with a little shrink tubing, but wasn't really satisfied with
it.
> > Besides, RG178 is a bit small looking to be a replacement for the 
original
> > cable.
> >
> > Some have suggested RG174 but with an OD of 0.100" or greater, it
won't 
> > fit
> > in the various connectors.
> >
> > The original cable's OD is about 0.084" and the coax I have is about

> > 0.083"
> > so it should work just fine.  It is PTFE (Teflon(r)) inside and out
with
> > silver-plated braid and inner conductor so it should be a very nice
> > replacement cable.
> >
> > I stumbled across this on eBay and the fellow is selling another lot
of 
it
> > so if you're interested I can point you to the auction.  I don't
know 
how
> > much of it he has in stock, but I've emailed him to see.
> >
> > Also, if anyone's interested, I may sell some of mine.  I had to buy
25'
> > and don't plan using all of it, but I don't know if/how much I'll
have 
> > left.
> >
> > I'm just happy to finally have a good cable and hope I can get all
of 
them
> > replaced.  The ones in my Motorola are quite ratty.
> >
> > Regards,
> >
> > Barry - N4BUQ
> > _____________________________________________________________
> > 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: 4
Date: 13 Jul 2006 23:49:35 -0000
From: "n4buq at knology.net" <n4buq at knology.net>
Subject: Re: [R-390] RF Coaxial Cables
To: r-390 at mailman.qth.net
Message-ID: <20060713234935.5239.qmail at webmail2.knology.net>
Content-Type: text/plain; charset=iso-8859-1

I heard from the seller.  He has a bit of this on odd length spools.
I've 
asked him for a price for 100'.  My plan would be to sell it in 8' or
10' 
lengths, enough to do a single radio, to listmembers.  I'll let you all 
know the price and if we have enough folks interested, it might be a
better 
deal than everyone bidding against each other (and there may be folks
who 
don't do eBay or PayPal).

73,

Barry - N4BUQ

On 13 Jul 2006 20:05:55 -0000, "n4buq at knology.net" <n4buq at knology.net> 
wrote :

> A few months ago, I started looking for some suitable cable to replace

the 
> output coax from my PTO as well as the other RF connections to the IF 
deck 
> and crystal deck.  These have gotten rather worn in my radios and
worry 
me 
> every time I start fooling with them.  They may be electrically okay
for 
> now, but with the jacket being broken in a few places, it makes the
cable 
> kind of weak in those areas and I'm constantly worried about the inner

> jacket failing at those same weak points.
> 
> I finally found something that looks to be a perfect fit.  Some have 
> suggested using RG178, but its OD is typically 0.072" or smaller and,
as 
> such, the clamp in the PTO won't grab on the jacket of the coax.  I
made 
it 
> work with a little shrink tubing, but wasn't really satisfied with it.

> Besides, RG178 is a bit small looking to be a replacement for the 
original 
> cable.
> 
> Some have suggested RG174 but with an OD of 0.100" or greater, it
won't 
fit 
> in the various connectors.
> 
> The original cable's OD is about 0.084" and the coax I have is about 
0.083" 
> so it should work just fine.  It is PTFE (Teflon(r)) inside and out
with 
> silver-plated braid and inner conductor so it should be a very nice 
> replacement cable.
> 
> I stumbled across this on eBay and the fellow is selling another lot
of 
it 
> so if you're interested I can point you to the auction.  I don't know
how 
> much of it he has in stock, but I've emailed him to see.
> 
> Also, if anyone's interested, I may sell some of mine.  I had to buy
25' 
> and don't plan using all of it, but I don't know if/how much I'll have

left.
> 
> I'm just happy to finally have a good cable and hope I can get all of 
them 
> replaced.  The ones in my Motorola are quite ratty.
> 
> Regards,
> 
> Barry - N4BUQ
> _____________________________________________________________
> 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
> 
> 
> 


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

_______________________________________________
R-390 mailing list
R-390 at mailman.qth.net
http://mailman.qth.net/mailman/listinfo/r-390


End of R-390 Digest, Vol 27, Issue 8
************************************

More information about the R-390 mailing list