DB-36 issue

[David B. Ritchie]

I have a K3/P3/9500/DB36 setup. Occasionally something sticks and the radio is deaf. If I send a DIT it clears and I can hear again. It's not the K3, it's not the cable connecting the K3 to the amp and it's not the TR relays in the amp.  Have people experienced this before?  What is the solution?  Tnx.
David. W6DR at ARRL dot NET

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[k6dgw]

Yes.  There was a thread on this subject a few weeks ago.  I use a large
[~150 ft elements] dipole fed with ladder line and a DXE balun.  It's
been up long enough that the connections between the elements and the
line [copper split nuts] have corroded.  At random times, especially
when I haven't been transmitting for awhile, the receiver gets very
quiet and the noise disappears off the bottom of the P3 baseline.  One
dit will restore things.

What is a DB-36?

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2014 Cal QSO Party 4-5 Oct 2014
- www.cqp.org

On 4/4/2014 2:50 PM, David B. Ritchie wrote:
> I have a K3/P3/9500/DB36 setup. Occasionally something sticks and the
> radio is deaf. If I send a DIT it clears and I can hear again. It's
> not the K3, it's not the cable connecting the K3 to the amp and it's
> not the TR relays in the amp.  Have people experienced this before?
> What is the solution?  Tnx. David. W6DR at ARRL dot NET

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[Mike Reublin]

Either a DB-25 that's been working out or a SteppIR antenna?

73, Mike NF4L

On Apr 4, 2014, at 6:14 PM, Fred Jensen <[hidden email]> wrote:
>
> What is a DB-36?
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 2014 Cal QSO Party 4-5 Oct 2014
> - www.cqp.org


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[Don Wilhelm-4]

David,

Check *every* connection in your antenna system - or better yet, re-do
all the connections.  If you have any purely mechanical connections that
are not soldered, those are suspicious.
Connections with wire nuts are *supposed* to be "gas tight", but in
outdoor conditions they usually are not after a period of good
operation.  That 'dit' is enough to break through the oxidation for a
short time, but it will return after a while.
Loose PL259/SO239 connections will behave similarly - those should be a
bit tighter than 'finger tight', so lightly twist them a bit more with
pliers.  If you have PL-259 connectors exposed to the weather, they
should be not only tight, but then wrapped with electrical tape followed
by a layer of coax seal to keep the elements out - the only reason for
the electrical tape is so you can disconnect them later - direct
application of coax seal works too, but you have a very difficult time
getting it off the connection.

Due diligence will find it.

73,
Don W3FPR

On 4/4/2014 5:50 PM, David B. Ritchie wrote:
> I have a K3/P3/9500/DB36 setup. Occasionally something sticks and the radio is deaf. If I send a DIT it clears and I can hear again. It's not the K3, it's not the cable connecting the K3 to the amp and it's not the TR relays in the amp.  Have people experienced this before?  What is the solution?  Tnx.
> David. W6DR at ARRL dot NET
>

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