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RSP-1A as panadapter

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weaverwf@usermail.com

RSP-1A as panadapter

For those of you using an SDRplay as a panadapter with the K3S, what RF protection do you use for the SDRplay?thanks and 73,Bill WE5PSent using rock and chisel
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Richard Ferch-2

Re: RSP-1A as panadapter

I use an RSP2 as a panadapter. I can feed it either from the K3's IF Out
connector, in which case no protection is needed, or from the K3's RX Ant
Out connector, in which case it is protected by the K3's T/R switch. In
both cases there is a signal present on the SDRplay's input during
transmit, but it is at a low enough level that it is not a concern.

The connection to the RX Ant Out connector is actually a jumper from RX Ant
Out to a splitter plus jumpers from the splitter to the RX Ant In connector
and the SDR's antenna input The splitter I use is actually just a UHF tee
with UHF-to-BNC cables. The K3's RX Ant needs to be engaged to use this
path. This makes using a separate RX antenna somewhat more complicated.

73,
Rich VE3KI

WE5P wrote:

For those of you using an SDRplay as a panadapter with the K3S, what RF
protection do you use for the SDRplay?
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AL7CR

Re: RSP-1A as panadapter

In reply to this post by weaverwf@usermail.com

I used an SDR-IQ connected directly to the IF out for many years with no problems whatever.

On Sun, Jan 5, 2020, at 2:29 PM, weaverwf wrote:

> For those of you using an SDRplay as a panadapter with the K3S, what RF
> protection do you use for the SDRplay?thanks and 73,Bill WE5PSent using
> rock and chisel
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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Bob McGraw - K4TAX

Re: RSP-1A as panadapter

I used an RSP-1 connected to the IF out quite successfully. In the end, I didn’t care for tying up the computer to run HDSDR. Purchased a P3 and I’m very satisfied with the results and ease of use.

Bob, K4TAX

Sent from my iPhone

> On Jan 5, 2020, at 8:54 PM, AL7CR <[hidden email]> wrote:
>
> I used an SDR-IQ connected directly to the IF out for many years with no problems whatever.
>
>> On Sun, Jan 5, 2020, at 2:29 PM, weaverwf wrote:
>> For those of you using an SDRplay as a panadapter with the K3S, what RF
>> protection do you use for the SDRplay?thanks and 73,Bill WE5PSent using
>> rock and chisel
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
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Barry LaZar

Re: RSP-1A as panadapter

In reply to this post by weaverwf@usermail.com

I use none. The K3s has an IF out that requires no protection. I've been
doing this for over a year with no problem. I drive the panadapter in
the Win4K3 suite with it, and it controls what I see out of the RSP.
Works like a champ with nothing special to do.

73,
Barry
K3NDM

------ Original Message ------
From: "weaverwf" <[hidden email]>
To: [hidden email]
Sent: 1/5/2020 5:29:14 PM
Subject: [Elecraft] RSP-1A as panadapter

>For those of you using an SDRplay as a panadapter with the K3S, what RF protection do you use for the SDRplay?thanks and 73,Bill WE5PSent using rock and chisel
>______________________________________________________________
>Elecraft mailing list
>Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>Post: mailto:[hidden email]
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>This list hosted by: http://www.qsl.net
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weaverwf@usermail.com

Re: RSP-1A as panadapter

Thanks for the replies guys. I believed that to be true but I'm glad to get some first hand confirmation.73,Bill WE5PSent using rock and chisel
-------- Original message --------From: Barry <[hidden email]> Date: 1/5/20 22:25 (GMT-05:00) To: weaverwf <[hidden email]>, [hidden email] Subject: Re: [Elecraft] RSP-1A as panadapter I use none. The K3s has an IF out that requires no protection. I've been doing this for over a year with no problem. I drive the panadapter in the Win4K3 suite with it, and it controls what I see out of the RSP. Works like a champ with nothing special to do.73,BarryK3NDM

------ Original Message ------
From: "weaverwf" <[hidden email]>
To: [hidden email]
Sent: 1/5/2020 5:29:14 PM
Subject: [Elecraft] RSP-1A as panadapter

For those of you using an SDRplay as a panadapter with the K3S, what RF protection do you use for the SDRplay?thanks and 73,Bill WE5PSent using rock and chisel
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Bob McGraw - K4TAX

Re: RSP-1A as panadapter

In reply to this post by AL7CR

If either the IF Output or the split approach with RX ANT IN and OUT is
used, the ports are protected during transmit. However, some of the
SDR receivers are in plastic / unshielded boxes and themselves may not
be adequately immune to RF. If one is concerned, it might be wise to
attempt to line the inside of the case with foil tape or enclose the
receiver in a suitable metal box {the way it should have been in the
first place}.

73

Bob, K4TAX

On 1/5/2020 8:40 PM, AL7CR wrote:

> I used an SDR-IQ connected directly to the IF out for many years with no problems whatever.
>
> On Sun, Jan 5, 2020, at 2:29 PM, weaverwf wrote:
>> For those of you using an SDRplay as a panadapter with the K3S, what RF
>> protection do you use for the SDRplay?thanks and 73,Bill WE5PSent using
>> rock and chisel
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
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Tox

Re: RSP-1A as panadapter

In reply to this post by AL7CR

Related...

Suggestion for connecting a kx3+kpa100 to an rsp?

Was trying to figure out how to notch out qrm yesterday that I think was
related to the contest, but not a wide enough passband on the wsjtx
integration to see the real peaks that were involved.

Have an rsp2* but have been afraid to set it up for fear of blowing out the
inputs.

Scott
AD6YT

On Sun, Jan 5, 2020, 6:41 PM AL7CR <[hidden email]> wrote:

> I used an SDR-IQ connected directly to the IF out for many years with no
> problems whatever.
>
> On Sun, Jan 5, 2020, at 2:29 PM, weaverwf wrote:
> > For those of you using an SDRplay as a panadapter with the K3S, what RF
> > protection do you use for the SDRplay?thanks and 73,Bill WE5PSent using
> > rock and chisel
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to [hidden email]
> ______________________________________________________________
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JHRichards

Re: RSP-1A as panadapter

In reply to this post by weaverwf@usermail.com

I use a couple of RF limiting protection devices, each purchased on
eBay.com, with my RSP1a. One is Chinese and cost $20, and the other
is from Slovenia and cost $32 (I think).   I have had excellent helpful
communication with the maker in Slovenia. From what I can tell, they
are each constructed with similar parts/circuits, and limits RF which
could damage the receiver.   A local electronics guru / Elmer who used
to design radio equipment for NASA and the Air Force reviewed them and
considers them appropriate to the task.   I use one of these RF limiters
whether I connect the RSP1a receiver directly to the rig or to a
separate antenna outside.

Other ops use similar RF limiting devices from Array Solutions and
DX-Engineering, which I am confident are also appropriate to the task at
around double the cost of mine. Just another way to skin the same cat.

Just my take.    K8JHR
________________________

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Clay Autery-2

Re: RSP-1A as panadapter

In reply to this post by Bob McGraw - K4TAX

On a related but tangent issue...

I just found the following link today:
*http://huprf.com/huprf/k3-if-buffer-pa-k3/*

/_*K3 IF Buffer – PA K3*_//_*
*_/

/The K3 and successors are recognized as the rig of choice by the vast
majority of serious contest operators and DX’ers worldwide. When
combined with the P3 Panoramic Adapter, SDR capabilities can be realized
on the small P3 screen or on a larger display using the SVGA option.
However, if you want to use the IF output to drive any other SDR
equipment, there are some issues that need addressing –//
/

* /    the output level of the IF port is about 15 to 20dB lower than
it should be, and/
* /    there are strong Local Oscillator signals from the K3 presented
at the IF Out port – this is still the case if you run from the P3
IF Out port.//
/

/The PA K3 is a small external buffer unit that can be attached to the
IF out port of any of the series (K3, K3S and P3).   It provides a
filter centred on 8.215MHz and an amplifier with approx 20dB of gain,
bringing signal back up to the correct levels. The filter uses wound
toroidal inductors, rather than lower Q SMD inductors./

+++++++++++++++++++++++++++++++++++++++++
From the Technical manual for this buffer assembly:

/In normal operation of the K3/K3S, the nearest LO signals to the IF are
when operating on Top Band (160m) -see Fig 2 below which was taken from
a recent K3S.
/*http://huprf.com/huprf/wp-content/uploads/2016/03/PA-K3-Manual-V1_1-1.pdf*/

/I am not smart enough in this part of things to know if this is a
"real" concern, or "marketing" to sell a buffer/amp kit. YMMV./
/

73,

______________________
Clay Autery, KY5G
(318) 518-1389

On 01/05/20 21:59, Bob McGraw K4TAX wrote:

> If either the IF Output or the split approach with RX ANT IN and OUT
> is used, the ports are protected during transmit. However, some of
> the SDR receivers are in plastic / unshielded boxes and themselves may
> not be adequately immune to RF. If one is concerned, it might be
> wise to attempt to line the inside of the case with foil tape or
> enclose the receiver in a suitable metal box {the way it should have
> been in the first place}.
>
> 73
>
> Bob, K4TAX
>
>
> On 1/5/2020 8:40 PM, AL7CR wrote:
>
>> I used an SDR-IQ connected directly to the IF out for many years with
>> no problems whatever.
>>
>> On Sun, Jan 5, 2020, at 2:29 PM, weaverwf wrote:

weaverwf@usermail.com

Re: RSP-1A as panadapter

Note that the product line sales have been suspended due to the owners death. The note on the site says that SDRplay will be taking over the product line in the near future.http://huprf.com/huprf/orders-prices/73,Bill WE5PSent using rock and chisel
-------- Original message --------From: Clay Autery <[hidden email]> Date: 1/6/20 03:43 (GMT-05:00) To: [hidden email] Subject: Re: [Elecraft] RSP-1A as panadapter On a related but tangent issue...I just found the following link today:*http://huprf.com/huprf/k3-if-buffer-pa-k3/*/_*K3 IF Buffer – PA K3*_//_**_//The K3 and successors are recognized as the rig of choice by the vast majority of serious contest operators and DX’ers worldwide. When combined with the P3 Panoramic Adapter, SDR capabilities can be realized on the small P3 screen or on a larger display using the SVGA option. However, if you want to use the IF output to drive any other SDR equipment, there are some issues that need addressing –/// * / the output level of the IF port is about 15 to 20dB lower than it should be, and/ * / there are strong Local Oscillator signals from the K3 presented at the IF Out port – this is still the case if you run from the P3 IF Out port.// //The PA K3 is a small external buffer unit that can be attached to the IF out port of any of the series (K3, K3S and P3). It provides a filter centred on 8.215MHz and an amplifier with approx 20dB of gain, bringing signal back up to the correct levels. The filter uses wound toroidal inductors, rather than lower Q SMD inductors./+++++++++++++++++++++++++++++++++++++++++ From the Technical manual for this buffer assembly:/In normal operation of the K3/K3S, the nearest LO signals to the IF are when operating on Top Band (160m) -see Fig 2 below which was taken from a recent K3S./*http://huprf.com/huprf/wp-content/uploads/2016/03/PA-K3-Manual-V1_1-1.pdf*//I am not smart enough in this part of things to know if this is a "real" concern, or "marketing" to sell a buffer/amp kit. YMMV.//73,______________________Clay Autery, KY5G(318) 518-1389On 01/05/20 21:59, Bob McGraw K4TAX wrote:> If either the IF Output or the split approach with RX ANT IN and OUT > is used, the ports are protected during transmit. However, some of > the SDR receivers are in plastic / unshielded boxes and themselves may > not be adequately immune to RF. If one is concerned, it might be > wise to attempt to line the inside of the case with foil tape or > enclose the receiver in a suitable metal box {the way it should have > been in the first place}.>> 73>> Bob, K4TAX>>> On 1/5/2020 8:40 PM, AL7CR wrote:>>> I used an SDR-IQ connected directly to the IF out for many years with >> no problems whatever.>>>> On Sun, Jan 5, 2020, at 2:29 PM, weaverwf wrote: ______________________________________________________________Elecraft mailing listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:[hidden email] list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.htmlMessage delivered to [hidden email]
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Clay Autery-2

Re: RSP-1A as panadapter

I am aware of that.... the owners of SDR-Kits has taken on the task of
maintaining the site and continuing sales of certain products. They
hinted at a "short kit" for this part...
IF I can get my hands on enough of a kit and docs to align the board
properly, I am going to build one for myself and test it on/off my K3s
IF Out, and the P3 IF out with and without the buffer to see what the
instruments say AND IF it makes any difference in display.

MOST importantly to me is that I NOT overload my SDRPlay while banging
out electrons on Top Band. <smile>

Again... I don't know if this is a "real issue" or a marketing
deal... Seems legit.

PS - Apologize to ALL for the crappy formatting of my previous post....
I forget that the mailman.qth.net has incredibly limited styling options
to improve readability.

73,

______________________
Clay Autery, KY5G
(318) 518-1389

On 01/06/20 02:56, Bill Weaver wrote:

> Note that the product line sales have been suspended due to the owners
> death. The note on the site says that SDRplay will be taking over the
> product line in the near future.
>
> http://huprf.com/huprf/orders-prices/
>
> 73,
> Bill WE5P
>
>
>
> Sent using rock and chisel
>
>
> -------- Original message --------
> From: Clay Autery <[hidden email]>
> Date: 1/6/20 03:43 (GMT-05:00)
> To: [hidden email]
> Subject: Re: [Elecraft] RSP-1A as panadapter
>
> On a related but tangent issue...
>
> I just found the following link today:
> *http://huprf.com/huprf/k3-if-buffer-pa-k3/*
>
> /_*K3 IF Buffer – PA K3*_//_*
> *_/
>
> /The K3 and successors are recognized as the rig of choice by the vast
> majority of serious contest operators and DX’ers worldwide. When
> combined with the P3 Panoramic Adapter, SDR capabilities can be realized
> on the small P3 screen or on a larger display using the SVGA option.
> However, if you want to use the IF output to drive any other SDR
> equipment, there are some issues that need addressing –//
> /
>
> * /    the output level of the IF port is about 15 to 20dB lower than
>     it should be, and/
> * /    there are strong Local Oscillator signals from the K3 presented
>     at the IF Out port – this is still the case if you run from the P3
>     IF Out port.//
>     /
>
> /The PA K3 is a small external buffer unit that can be attached to the
> IF out port of any of the series (K3, K3S and P3).   It provides a
> filter centred on 8.215MHz and an amplifier with approx 20dB of gain,
> bringing signal back up to the correct levels. The filter uses wound
> toroidal inductors, rather than lower Q SMD inductors./
>
> +++++++++++++++++++++++++++++++++++++++++
> From the Technical manual for this buffer assembly:
>
> /In normal operation of the K3/K3S, the nearest LO signals to the IF are
> when operating on Top Band (160m) -see Fig 2 below which was taken from
> a recent K3S.
> /*http://huprf.com/huprf/wp-content/uploads/2016/03/PA-K3-Manual-V1_1-1.pdf*/
>
> /I am not smart enough in this part of things to know if this is a
> "real" concern, or "marketing" to sell a buffer/amp kit. YMMV./
> /
>
> 73,
>
> ______________________
> Clay Autery, KY5G
> (318) 518-1389
>
> On 01/05/20 21:59, Bob McGraw K4TAX wrote:
> > If either the IF Output or the split approach with RX ANT IN and OUT
> > is used, the ports are protected during transmit.   However, some of
> > the SDR receivers are in plastic / unshielded boxes and themselves may
> > not be adequately immune to RF.    If one is concerned, it might be
> > wise to attempt to line the inside of the case with foil tape or
> > enclose the receiver in a suitable metal box {the way it should have
> > been in the first place}.
> >
> > 73
> >
> > Bob, K4TAX
> >
> >
> > On 1/5/2020 8:40 PM, AL7CR wrote:
> >
> >> I used an SDR-IQ connected directly to the IF out for many years with
> >> no problems whatever.
> >>
> >> On Sun, Jan 5, 2020, at 2:29 PM, weaverwf wrote:
>

weaverwf@usermail.com

Re: RSP-1A as panadapter

I'll be looking forward to your review. Due to the type of business that it seemed to be, there probably is some merit to it.73,Bill WE5PSent using rock and chisel
-------- Original message --------From: Clay Autery <[hidden email]> Date: 1/6/20 04:11 (GMT-05:00) To: Bill Weaver <[hidden email]>, [hidden email] Subject: Re: [Elecraft] RSP-1A as panadapter
I am aware of that.... the owners of SDR-Kits
has taken on the task of maintaining the site and continuing
sales of certain products. They hinted at a "short kit" for
this part...
IF I can get my hands on enough of a kit and docs to align the
board properly, I am going to build one for myself and test it
on/off my K3s IF Out, and the P3 IF out with and without the
buffer to see what the instruments say AND IF it makes any
difference in display.

MOST importantly to me is that I NOT overload
my SDRPlay while banging out electrons on Top Band.
<smile>

Again... I don't know if this is a "real
issue" or a marketing deal...   Seems legit.

PS - Apologize to ALL for the crappy formatting of my previous
post.... I forget that the mailman.qth.net has incredibly
limited styling options to improve readability.
73,

______________________
Clay Autery, KY5G
(318) 518-1389
On 01/06/20 02:56, Bill Weaver wrote:

Note that the product line sales have been
suspended due to the owners death. The note on the site says
that SDRplay will be taking over the product line in the near
future.

http://huprf.com/huprf/orders-prices/

73,
Bill WE5P

Sent using
rock and chisel

-------- Original message --------
From: Clay Autery <[hidden email]>
Date: 1/6/20 03:43 (GMT-05:00)
To: [hidden email]
Subject: Re: [Elecraft] RSP-1A as panadapter

On a related but tangent issue...

I just found the following link today:
*http://huprf.com/huprf/k3-if-buffer-pa-k3/*

/_*K3 IF Buffer – PA K3*_//_*
*_/

/The K3 and successors are recognized as the rig of choice by the
vast
majority of serious contest operators and DX’ers worldwide. When
combined with the P3 Panoramic Adapter, SDR capabilities can be
realized
on the small P3 screen or on a larger display using the SVGA
option.
However, if you want to use the IF output to drive any other SDR
equipment, there are some issues that need addressing –//
/

* /    the output level of the IF port is about 15 to 20dB lower
than
    it should be, and/
* /    there are strong Local Oscillator signals from the K3
presented
    at the IF Out port – this is still the case if you run from
the P3
    IF Out port.//
    /

/The PA K3 is a small external buffer unit that can be attached to
the
IF out port of any of the series (K3, K3S and P3).   It provides a

filter centred on 8.215MHz and an amplifier with approx 20dB of
gain,
bringing signal back up to the correct levels. The filter uses
wound
toroidal inductors, rather than lower Q SMD inductors./

+++++++++++++++++++++++++++++++++++++++++
From the Technical manual for this buffer assembly:

/In normal operation of the K3/K3S, the nearest LO signals to the
IF are
when operating on Top Band (160m) -see Fig 2 below which was taken
from
a recent K3S.
/*http://huprf.com/huprf/wp-content/uploads/2016/03/PA-K3-Manual-V1_1-1.pdf*/

/I am not smart enough in this part of things to know if this is a

"real" concern, or "marketing" to sell a buffer/amp kit. YMMV./
/

73,

______________________
Clay Autery, KY5G
(318) 518-1389

On 01/05/20 21:59, Bob McGraw K4TAX wrote:
> If either the IF Output or the split approach with RX ANT IN
and OUT
> is used, the ports are protected during transmit.   However,
some of
> the SDR receivers are in plastic / unshielded boxes and
themselves may
> not be adequately immune to RF.    If one is concerned, it
might be
> wise to attempt to line the inside of the case with foil tape
or
> enclose the receiver in a suitable metal box {the way it
should have
> been in the first place}.
>
> 73
>
> Bob, K4TAX
>
>
> On 1/5/2020 8:40 PM, AL7CR wrote:
>
>> I used an SDR-IQ connected directly to the IF out for
many years with
>> no problems whatever.
>>
>> On Sun, Jan 5, 2020, at 2:29 PM, weaverwf wrote:

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Nr4c

Re: RSP-1A as panadapter

In reply to this post by Tox

IF Out and RecAnt in/out are protected during TX.

Sent from my iPhone
...nr4c. bill

> On Jan 5, 2020, at 11:54 PM, Tox <[hidden email]> wrote:
>
> Related...
>
> Suggestion for connecting a kx3+kpa100 to an rsp?
>
> Was trying to figure out how to notch out qrm yesterday that I think was
> related to the contest, but not a wide enough passband on the wsjtx
> integration to see the real peaks that were involved.
>
> Have an rsp2* but have been afraid to set it up for fear of blowing out the
> inputs.
>
> Scott
> AD6YT
>
>> On Sun, Jan 5, 2020, 6:41 PM AL7CR <[hidden email]> wrote:
>>
>> I used an SDR-IQ connected directly to the IF out for many years with no
>> problems whatever.
>>
>>> On Sun, Jan 5, 2020, at 2:29 PM, weaverwf wrote:
>>> For those of you using an SDRplay as a panadapter with the K3S, what RF
>>> protection do you use for the SDRplay?thanks and 73,Bill WE5PSent using
>>> rock and chisel
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Drew AF2Z

Re: RSP-1A as panadapter

In reply to this post by weaverwf@usermail.com

I don't use any RF protection. I carefully tested the signal levels on
my RX loop + RSP1a on all bands and various power outputs from my
transmitter. The separation/arrangement of my RX and TX antennas (not
all that much) was sufficient to provide safe signal levels up to 100
watts output. My RX antenna is a 3-ft dia "magnetic" loop with the LZ1AQ
preamp.

73,
Drew
AF2Z

On 01/05/20 17:29, weaverwf wrote:

> For those of you using an SDRplay as a panadapter with the K3S, what RF protection do you use for the SDRplay?thanks and 73,Bill WE5PSent using rock and chisel
> ______________________________________________________________
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>