Dave G4GED Wrote on Feb. 22nd.
Hi and thanks for reading.
I'm trying to splice a damaged (rodents) RX ant control cable.
It has 7 insulated, stranded copper conductors all inside a PVC jacket.
Problem is, when stripped of their insulation, 3 (black, brown and
green), of the copper conductors
Bruce,
I have considerable experience with loop arrays; whilst they are good
performers in an electrically noisy environment, they suffer from poor
directivity at higher angles. This can also be seen with EZNEC models by
looking at the AZ Plot with an Elevation angle of say 40 degrees.
The
As far as am aware On-Semi still make the TO-92 J310. Fairchild ceased
production about 2 years back. I did a last time buy from Mouser for several
thousand J310 and the much more linear J309.
73
Andrew Ikin G8LUG
_
Topband Reflector
Thirty years ago I used 6DJ8 (E88CC) to solve a third order IMD problem with
tuned loop that was using J310s.
The IMD was caused by Radio Free Europe on 13m.
73
Andrew
- Original Message -
From: Charlie Cunningham charlie-cunning...@nc.rr.com
To: 'Andy Ikin' andrew.i
-
From: Charlie Cunningham charlie-cunning...@nc.rr.com
To: 'Andy Ikin' andrew.i...@btopenworld.com
Cc: 'Topband Reflector' topband@contesting.com
Sent: Sunday, August 25, 2013 10:29 PM
Subject: Re: Topband: Anyone have a boat load of J-310s?
Yes, we could swing the grids of those tubes quite
Gary wrote on May 21.
I've had a Wellbrooke loop for a few years at 20' on a TV rotator. It
nulls a single nearby QRN source NW at 300 deg true. EU is about 15-30 deg
from here. When 160 or 80 are open over the N Pole, it often helps me hear
the weak.
It's less effective on multi-source
Richard Karlquist wrote on May 21.
It is important to understand that these loops have
a circumference of 10 feet, which they are limited
to because the manufacturers want to offer a bandwidth
up to 30 MHz. Also, they are untuned, again because
the manufacturers want to offer a broadband
Rune,
Let me have your address of list.
I can let you have a few of Fair-rite 2873000302 or 287300202 cores. I can't
help you with the large ring core. There is no reason why you can't use the
above as a 1:1 isolation transformer to reduce common mode at the receiver
( e.g. 5 turns biffilar
Rag LA5HE wrote on April 9,
I put one up last autum and have compared it with my Titanex V160HD .
At this quiet location I had to realise that nothing was gained, which was
a disappointment !
73 Rag LA5HE in Telemark
Rag, the ALA1530 is not designed to compete with very large antennas like
Steve WB6RSE, wrote on May 8, 2011
If you've built your own Mobius receiving loop of tried the commercial
product, a report of your experience would be of great interest to the Top
Band list.
Steve, I have just received a recent review comparing the above product to
the Wellbrook ALA1530, it
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