David & All,
I've been using broadside DHDL's since 9 years. The configuration was
like is described in IV3PRK article :
"The distance between Deltas is about 95m. Resistors are 1250 ohm ,
tranformers 12:1 bifilar windings ,2 pieces of coax 75 ohm each one 50m
connected together to transforme
Terry, I strongly encourage you to put up the K9AY. By no numerical measure is
it the best. But it’s easy to put up and Compared to all the others, it is
relatively insensitive to other objects around it. And for a first RC antenna,
it is super satisfying to click between directions and hear sta
This is a really good answer. Thanks Tim.
73 - Mark N5OT
On 7/29/2019 7:12 AM, Tim Shoppa wrote:
Terry, I strongly encourage you to put up the K9AY. By no numerical measure is
it the best. But it’s easy to put up and Compared to all the others, it is
relatively insensitive to other objects a
RF Parts has corrected their BLOG for the VHC-3 vacuum relay to 12 VDC
coil voltage.
They have a limited supply of them in stock.
73
Bruce-k1fz
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
I am using a Hi-Z 8 here along with a Waller Flag?? (From N4IS es TopBand
Systems) at 95 feet. In the past I had up a K9AY antennas, several short
beverages and several Ewe's. I also had up a low dipole at one time.
What I am using now is head and shoulders above any of the above listed
compro
Restoration project. Was new, never in service. Bottom portion of cabinet,
power supplies flooded during Sandy. Exciter and PA stage were not flooded,
tubes never powered. Blowers need replacement. Operating and maintenance manual
included.
Pictures at
https://www.ebay.com/itm/183902290790
Y
A friend of mine in our local radio club sent me the following email
"I'm 6/10's of a mile from an AM 910 KHz. transmitter. They operate with 5k
daytime and 2k at night.
They're S9+45db on 160 meters with clear audio and S9+35db on 80 meters.
have an inverted "V" resonant at 3.715 MHz. orientated
Mark,
I had the same problem - I live a mile from 760 AM at 50KW 24/7. I used a
homebrew highpass filter and that helped but didn't quite reduce it enough.
What I figured out was the signal was also on the coax braid! I put two mix
71 toroids, wound 6 turns of coax through them as close to the rig
Normally - you would only put BCB filters in the receive line - so you
don't need something that handles lots of power. I don't understand why
anyone would be looking at transmit filters for this problem.
There are some basic debugging steps that should be taken to really
understand the nature of
Here is what I used when I had the same problem 50kw line of sight 4
miles 1MHz. Expensive, but worked very well.
http://herostechnology.co.uk/pages/RF_Filters.html
Having the filter between rig and amp worked fine for me. 200w rating
for the Heros.
My power line had ~1v of RF, so ebay Spra
Hi,
Some radios do not have a separate receive antenna connector. The
'friend' wants an out of the box solution. Without a sparate RX antenna
connector it would be required to handle the transmitter power.
73,
Bill KU8H
On 7/29/19 1:24 PM, Tree wrote:
Normally - you would only put BCB fil
Had a similar problem at Field Day a few years ago with WJR (50,000 watt
station). Noticed the problem was not present when antenna tuner was
inline. Many modern rigs have broadband front ends which provide very
little attenuation to out of band signals, and just the addition of an
antenna tuner
When I was in Guam I used a Dunestar 400hpf with good results
Gus K4SXT
> On Jul 29, 2019, at 14:08, Don Kirk wrote:
>
> Had a similar problem at Field Day a few years ago with WJR (50,000 watt
> station). Noticed the problem was not present when antenna tuner was
> inline. Many modern rigs
For signals reaching your equipment via coax shield: I found something that
works very well to eliminate this is a pair of back to back baluns as close
to the rcvr as possible. --Mike, WV2ZOW
On Mon, Jul 29, 2019 at 1:34 PM Grant Saviers wrote:
> Here is what I used when I had the same problem 5
If the S-Meter is close to accurate, the signal on 160 meters is better
than -30 dBm.
One cannot dismiss that the noise floor of the transmitter on 160 meters is
stronger than atmospheric noise and can only be lowered at the transmitter.
Jim - KR9U
>On Mon, Jul 29, 2019 at 9:29 AM Mark K3MSB
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