Doug,
Yes, thanks, you're right. I have the preamp set up to be active for the
higher bands 12, 10, and 6 m, and in the bypass position otherwise. I use
this to connect an old shortwave receiver (not an SDR) to my main antenna,
so I guess it doesn't hurt for it with the extra gain. But I'll try
Sverre,
That answer depends ---
If you want to connect the SDR directly to the antenna, put the TEE
between the ANT OUT and the preamp.
OTOH, if you want to have the preamp in-line for the SDR input, put the
TEE between the preamp output and the ANT IN connector.
If you chose to use the
Thanks, Joe.
Works nicely and saved me the cost of something like the MFJ-1708B-SDR SDR
RF sensing T/R switch!
-
Sverre, LA3ZA
K2 #2198, K3 #3391,
LA3ZA Blog: http://la3za.blogspot.com,
LA3ZA Unofficial Guide to K2 modifications:
After the PR6/PR10 to gain the benefit of the PR6/PR10 for
the SDR as well as the K3/KRX3 receiver(s).
73,
... Joe, W4TV
On 2019-04-09 6:48 AM, Sverre Holm (LA3ZA) wrote:
But what if there is a PR6-10 preamp in this path. Where should the
splitter/TEE-adapter be in that case?
In
But what if there is a PR6-10 preamp in this path. Where should the
splitter/TEE-adapter be in that case?
>In brief, it takes a TEE adapter and 2 short pieces of coax. Put the
>adapter between the 2 pieces of coax, and then connect one coax to ANT
>OUT and the other to ANT IN.
-
Martin,
Connecting the SDR to the ANT OUT/ANT IN jacks allows the SDR to see the
enitire spectrum of the K3 antenna below the cutoff of the Low Pass filters.
Thaqt is apt to pick up any responses that are within the range of the
SDR tuning, and if there are spurs coming from your antenna
I've been playing with this sort of setup recently. I have a K3 with a
KXV3 and an SDRPlay RSP1. For my usage I find that theP3 is a better
option and when I want the display on the PC I have the RSP1 connected
to the P3 IF Out and use the software set to accommodate it is working
at a fixed
I don't understand the math behind this. The 50 ohm input Z of the K3
terminates the transmission line. The SDR sees whatever voltage is
across the K3 input. More to the point, why does it matter? In most
real world stations, especially below VHF, noise from the antenna is
sufficiently
On 2019-04-08 4:31 PM, Bob McGraw K4TAX wrote:
> I don't find the input impedance of the SDR Play/RSP1 to be
> anywhere near 50 ohms. In fact it is much higher.Thus the result
> of using a simple BNC "T" does not load the signal of the main
> receiver.
However, since the K3 receiver is
Thank you gents! Now to uppack my KPA500 which came back from support
today...
73s and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Technical Specialist
ARRL Volunteer Examiner
ARRL OOC for Oregon
On 4/8/19 1:31 PM, Bob McGraw K4TAX wrote:
I agree with Joe in the procedure. As to using or
I agree with Joe in the procedure. As to using or the need for a
"splitter", I don't find the input impedance of the SDR Play/RSP1 to be
anywhere near 50 ohms. In fact it is much higher. Thus the result
of using a simple BNC "T" does not load the signal of the main
receiver. If your
Dave,
Look for a post by Bob McGraw.
In brief, it takes a TEE adapter and 2 short pieces of coax. Put the
adapter between the 2 pieces of coax, and then connect one coax to ANT
OUT and the other to ANT IN. The SDR is connected to the TEE adapter.
To get output to the SDR, you must set the
The answer indicated connecting the SDR antenna to some connector in
the rear of the radio, and pressing some number of front panel keys
to route the signals from the antenna to the SDR...
Connect a splitter, input to the RX Ant Out jack, one output to the
RX ANT IN jack and the other output
A few months ago someone asked how to move the antenna signal coming in
on the main antenna connector of a K3 to an external SDR via some
connector in the rear of the K3.
The answer indicated connecting the SDR antenna to some connector in the
rear of the radio, and pressing some number of
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