1. main@SDR-Radio.groups.io
  2. Messages
   Date   
Re: SMA antenna switcher?

Allan Isaacs
 

Hi Andrew
This is an interesting topic.
I use the Armstrong method of aerial switching and use F-type connectors
with an SMA-F adaptor for cheapness.
The basic question though is how many aerials you want to switch and whether
you have plans for transmitting rather than just receiving?
An ideal receive solution might be to make a switch in a diecast box and if
you don't like electromechanical relays use perhaps PIN diodes or a
PIN/Schottky diode pairs or even FETs. An advantage in designing your own
would be that you can add filters. Depending on the distance you need to
operate the switch and how many aerials you need to switch you could use a
length of CAT5 cable which has 8 wires which could select one of seven
aerials.
Allan G3PIY

-----Original Message-----
From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf
Of Andrew Sutcliffe
Sent: 26 October 2017 18:37
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] SMA antenna switcher?

Hi

I am wondering what you all use for switching antennas from HF to
VHF/UHF. I have looked on ebay for SMA antenna switch and get no
results (except in the $150+ range!) that would be any good.

I really want to switch in and out remotely if possible so a voltage
controlled relay switch would be best and I can make a wireless
interface to toggle it from the shack.

So, where should I look and what would you recommend I get?

Thanks! :)

Re: audio stutter with Airspy decimation

Simon Brown
 

Let’s try again.

 

*Please* read the text on http://www.sdr-radio.com/Support

 

  • Make sure the radio is running!
  • Use the built-in option,
  • Add as an attachment if possible.

 

I need to see the screenshot while the radio is running with the Home pane of the ribbon bar visible.

 

Simon Brown, G4ELI

 

www.dxgalaxy.com
www.sdr-radio.com
www.sdr-satellites.com

 

 

From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of M0ZEH
Sent: 27 October 2017 07:15
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] audio stutter with Airspy decimation

 

screenshot here https://1drv.ms/i/s!Ao0_Yb5_GKW5i6F5ctXIeKdmC4H9FA

Re: audio stutter with Airspy decimation

M0ZEH <m0zeh@...>
 

Re: audio stutter with Airspy decimation

Simon Brown
 

Please,

 

Don’t forget the screenshot as I requested. I’ll try to help just as soon as I see the screenshot.

 

Simon Brown, G4ELI

 

www.dxgalaxy.com
www.sdr-radio.com
www.sdr-satellites.com

 

 

From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of M0ZEH
Sent: 27 October 2017 06:52
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] audio stutter with Airspy decimation

 

the server is in one room and i am in another room on a different pc.

Re: audio stutter with Airspy decimation

M0ZEH <m0zeh@...>
 

the server is in one room and i am in another room on a different pc.

Re: audio stutter with Airspy decimation

M0ZEH <m0zeh@...>
 

On Thu, Oct 26, 2017 at 02:49 pm, Simon Brown wrote:
I tried all settings for reducing the bandwidth, bit size and increasing the buffering.
Re: audio stutter with Airspy decimation

M0ZEH <m0zeh@...>
 

woops.  no it doesn't work fine with rtl_server.  just checked.  Both servers sometimes start off ok then after a few seconds the stutter starts and gets worse.

Re: audio stutter with Airspy decimation

M0ZEH <m0zeh@...>
 

Works fine with rtl_server.

Re: audio stutter with Airspy decimation

M0ZEH <m0zeh@...>
 

Tried all bandwidths 8 bit, 16,24.32 all the same. Tried all bandwidths as well. Even when listening to the noise floor I get it.  Also the noise floor moves up an down.  It is less noticeable on very strong signals.

Re: audio stutter with Airspy decimation

Ray Lyford
 

Voice muting for overload perhaps.


Ray



From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> on behalf of Simon Brown <simon@...>
Sent: 26 October 2017 21:49
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] audio stutter with Airspy decimation
 

Hi,

 

Please see: http://www.sdr-radio.com/Support problem?

www.sdr-radio.com
Please do not send e-mail to the development team unless absolutely necessary. The fount of all knowledge is the Groups.io forum, several thousand happy members of ...


 

I would like to see a screenshot with the Home pane of the ribbon bar visible.

 

I think the problem will be bandwidth-related, you can try reducing the bandwidth, bit size and increasing the buffering.

 

Simon Brown, G4ELI

 

www.dxgalaxy.com

www.dxgalaxy.com
At the moment you can't register, but if I ever get time I'll add registration so you can post spots. Please don't hold your breath - I have a lot to do such as book ...



www.sdr-radio.com

www.sdr-radio.com
SDR-Radio.com is a Windows console for Software Defined Radio (SDR) receivers and transceivers. Designed for the commercial, government, amateur radio and short-wave ...



www.sdr-satellites.com

www.sdr-satellites.com
This website describes the first preview of the satellite tracking interface in version 3 of the SDR-Radio.com SDR software. The satellite tracking provides a simple ...


 

 

From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of M0ZEH
Sent: 26 October 2017 21:25
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] audio stutter with Airspy decimation

 

I have stutter using latest sdr radio download Oct 23rd.  Using rtl dongle with airspy latest server.  Tried loads of different settings.  sdr# is A ok.

Re: SMA antenna switcher?

Matthew
 

Search for "RF coaxial relay" on ebay and you'll find a heap of Chinese, Russian and Israeli surplus RF switches with varying configurations on the market.

Alternatively look at the Tohtsu series for new stock out of Japan, rf parts shop or ebay.

Going cheaper if you can still find the Omron G6Z series of  coaxial RF relays they were good to UHF at low-ish powers.

With these sorts of switches you pay for what you get.

73

Matthew
 VK5ZM


On 27 October 2017 at 04:07, Andrew Sutcliffe <skywatch@...> wrote:
Hi

I am wondering what you all use for switching antennas from HF to VHF/UHF. I have looked on ebay for SMA antenna switch and get no results (except in the $150+ range!) that would be any good.

I really want to switch in and out remotely if possible so a voltage controlled relay switch would be best and I can make a wireless interface to toggle it from the shack.

So, where should I look and what would you recommend I get?

Thanks! :)
Re: SMA antenna switcher?

doug
 

On 10/26/2017 12:37 PM, Andrew Sutcliffe wrote:
Hi

I am wondering what you all use for switching antennas from HF to VHF/UHF. I have looked on ebay for SMA antenna switch and get no results (except in the $150+ range!) that would be any good.

I really want to switch in and out remotely if possible so a voltage controlled relay switch would be best and I can make a wireless interface to toggle it from the shack.

So, where should I look and what would you recommend I get?

Thanks! :)
Why not buy some adapters to/from type N? There are lots of switches, manual and relay-type for type N, and should be cheaper than
type SMA. Also, SMA are limited in power level, but if you already have SMA you know that. Anything but UHF!!!

--doug, WA2SAY--retired RF engineer

Re: audio stutter with Airspy decimation

Simon Brown
 

Hi,

 

Please see: http://www.sdr-radio.com/Support problem?

 

I would like to see a screenshot with the Home pane of the ribbon bar visible.

 

I think the problem will be bandwidth-related, you can try reducing the bandwidth, bit size and increasing the buffering.

 

Simon Brown, G4ELI

 

www.dxgalaxy.com
www.sdr-radio.com
www.sdr-satellites.com

 

 

From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of M0ZEH
Sent: 26 October 2017 21:25
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] audio stutter with Airspy decimation

 

I have stutter using latest sdr radio download Oct 23rd.  Using rtl dongle with airspy latest server.  Tried loads of different settings.  sdr# is A ok.

Re: RTLSDR via Spyserver

Jon Fear
 

Thanks Simon...

Re: RTLSDR via Spyserver

Simon Brown
 

Hi,

 

Go back to Preview 7, that’s more-or-less what I’m using. Will send you a link to a kit by e-mail.

 

Simon Brown, G4ELI

 

www.dxgalaxy.com
www.sdr-radio.com
www.sdr-satellites.com

 

 

From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Jon Fear
Sent: 26 October 2017 22:29
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] RTLSDR via Spyserver

 

Thought I better attach a log file...

Re: RTLSDR via Spyserver

Jon Fear
 

Thought I better attach a log file...

Re: RTLSDR via Spyserver

Jon Fear
 

Simon

Hmm good to see you can see the dongle. Now I cannot get either the mini or the dongle to run locally...

I will go back to the earlier release and work from there . It must be something i have done...again!

Thanks so much for your help.

Jon

Re: audio stutter with Airspy decimation

M0ZEH <m0zeh@...>
 

I have stutter using latest sdr radio download Oct 23rd.  Using rtl dongle with airspy latest server.  Tried loads of different settings.  sdr# is A ok.

Re: SMA antenna switcher?

paul newcombe <G6YZC@...>
 

I use $20 sma failsafe relays from ebay. 

As these are what i would call make or break relays you could easily use a sonoff type wifi switch for remote access.
Sent on a Sprint Samsung Galaxy Note® II


-------- Original message --------
From: Andrew Sutcliffe
Date:10/26/2017 1:37 PM (GMT-05:00)
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] SMA antenna switcher?

Hi

I am wondering what you all use for switching antennas from HF to
VHF/UHF. I have looked on ebay for SMA antenna switch and get no
results (except in the $150+ range!) that would be any good.

I really want to switch in and out remotely if possible so a voltage
controlled relay switch would be best and I can make a wireless
interface to toggle it from the shack.

So, where should I look and what would you recommend I get?

Thanks! :)

SMA antenna switcher?

Andrew Sutcliffe
 

Hi

I am wondering what you all use for switching antennas from HF to VHF/UHF. I have looked on ebay for SMA antenna switch and get no results (except in the $150+ range!) that would be any good.

I really want to switch in and out remotely if possible so a voltage controlled relay switch would be best and I can make a wireless interface to toggle it from the shack.

So, where should I look and what would you recommend I get?

Thanks! :)

32641 - 32660 of 69511