Wrong use of 75/50 ohm cables is a cause of unreliability on scopes: they're
made for 75ohm connectors and if you plug in a 50ohm plug is will eventually
splay the centre contact and cause intermittency.
David
G3UNA
Subject: Re: [Elecraft] [K3] [P3] IF Out / IF In Cable
Yes, the cable
splay the centre contact and cause intermittency.
David
G3UNA
Subject: Re: [Elecraft] [K3] [P3] IF Out / IF In Cable
Yes, the cable impedance does not matter but the connectors do. The
75-ohm cable probably has 75-ohm BNC plugs, which as I recall have a
smaller pin. They might not make
and cause intermittency.
David
G3UNA
Subject: Re: [Elecraft] [K3] [P3] IF Out / IF In Cable
Yes, the cable impedance does not matter but the connectors do. The
75-ohm cable probably has 75-ohm BNC plugs, which as I recall have a
smaller pin. They might not make reliable connections
Sent a correction out 30 minutes ago but have not seen it yet. Too early
in the morning to get all the numbers out of my fingers onto the keyboard.
Paragraph should read:
50 and 75 ohm N connectors are not mechanically compatible as the center
pins are different diameter--50 ohm has larger pin
Yes there is a difference. But according to Amphenol spec sheet, Two
distinct types of 75 Ω BNC's are available, and both mate with each
other and with 50 Ω BNC's. the difference is in the dielectric
This I doubt will be an issue at IF frequency.
This is also backed up in the highly reliable
I just bought this one, and it works fine. I wiggled it like
crazy, and there's no sign of flakiness:
http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItemitem=180881244661ssPageName=ADME:L:OU:US:3160
Dave Hachadorian, K6LL
Big Bear Lake, California
.
Well, to throw you all out of whack, I used the 93ohm cable. There is
no dielectric between the pin and shield. My micrometer will not get in
that space very well, but it appears that the diameter is ~1.20mm. I
have not noticed any squirrely problems so I'll keep it there for now.
Thanks
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dave Hachadorian
Sent: Monday, September 17, 2012 9:00 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] [K3] [P3] IF Out / IF In Cable
I just bought this one, and it works
On 9/17/2012 10:33 AM, Fred Townsend wrote:
Personally I don't want a 75 ohm cable in the shack where I might use it on
my Ant 3 (K3) connection where it will make a difference. Each to his own.
There are times when 75 ohm cable is preferred, regardless of the rated
load impedance of the rig
Yes, the cable impedance does not matter but the connectors do. The
75-ohm cable probably has 75-ohm BNC plugs, which as I recall have a
smaller pin. They might not make reliable connections with the 50-ohm
sockets on the K3 and P3.
Go ahead and try it, but if the connections seem flakey you
On 9/16/2012 8:11 PM, Alan Bloom wrote:
Yes, the cable impedance does not matter but the connectors do. The
75-ohm cable probably has 75-ohm BNC plugs, which as I recall have a
smaller pin. They might not make reliable connections with the 50-ohm
sockets on the K3 and P3.
Go ahead and try
I purchased my P3 second-hand. I have always wondered why the IF Out to
IF In cable was so blasted short. I mean, it's only about 12.5 long.
With that length, my P3 sits on the left of my K3. That would be the
handle side of the K3. I never could understand why that was. Well, I
think I
Joel,
You asking for nothing more than the standard cable.
I recall (don't have a P3 myself) that the stock Elecraft cable allows
the P3 to be positioned on either side of the K3.
I would suggest that you either make up your own custom length cable or
purchase the replacement part from
The seller either substituted a different cable or cut the original.
The original cable is 36 (92 cm) long. If you want to buy an original
cable, order E980170 from parts at elecraft.com.
73, Ron AC7AC
-Original Message-
Joel,
You asking for nothing more than the standard cable.
I
Just try one of the non-50-ohm cables and see if it works. My guess is that it
will, but
nothing will explode if it doesn't!
On 9/15/2012 3:18 PM, Joel Black wrote:
I purchased my P3 second-hand. I have always wondered why the IF Out to
IF In cable was so blasted short. I mean, it's only
On 9/15/2012 5:01 PM, Vic K2VCO wrote:
Just try one of the non-50-ohm cables and see if it works
Cable impedance absolutely does not matter for such a short run at the
IF frequency.
73, Jim K9YC
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