RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog
 

Go Back   The RadioReference.com Forums > Scanners, Receivers and Related Equipment Forums > Antennas and Associated Hardware > Splitters, Filters and Multicouplers


Splitters, Filters and Multicouplers - For discussion of all inline devices used to split, combine or amplify a receive signal. This forum is not for any bi-directional (transmit) device. Use the Amateur or Commercial Radio forums for those.

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 06-11-2018, 7:33 PM
scanman10's Avatar
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Dec 2002
Location: S.E. Michigan
Posts: 165
Default Splitting my discone antenna for 2 or 3 scanners

I have a discone antenna in my attic and it's working real well for my Uniden BCD536HP scanner. I recently bought a Uniden SDS100 scanner and would like to run both scanners off this one antenna. What should I get to run two or three scanners from this one antenna?
Thanks,
__________________
73's
Tom - N8TXX
SDS100, IC-7300, BCD536HP, HP-1E, PSR-800, BC785D, BC780XLT, PRO-2006, PRO-32A, IC-2SRA
Reply With Quote
Sponsored links
  #2 (permalink)  
Old 06-11-2018, 8:11 PM
buddrousa's Avatar
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Jan 2003
Location: NW Tenn
Posts: 4,393
Default

4 Port MCA204M VHF/UHF Receiver Multicoupler - 25 MHz to 1 GHz | Scanner Master
I run one of these in my car and 2 8 ports at home
__________________
Support your local FIRE & EMS. PRO197-18-107-668:PSR-410 X2: BC8500XLT 785d BCD436HP BCD536HPx3 BCT346 BCD996P2 x3 BCT15x2 BCT15X2 TRX-1 TRX-2 EFJ51SL MTX8250 Tk280 TK2180 MD380x4 NX5300 NX5200 Buddy
Reply With Quote
  #3 (permalink)  
Old 06-11-2018, 9:08 PM
chief21's Avatar
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Mar 2004
Location: Summer - western NC mountains; Winter - central FL gulf coast
Posts: 672
Default

Quote:
Originally Posted by buddrousa View Post
I agree. Excellent multi-couplers (but not cheap).
Reply With Quote
  #4 (permalink)  
Old 06-11-2018, 9:20 PM
CQ's Avatar
CQ CQ is offline
Member
  Shack Photos
Shack photos
 
Join Date: Jan 2015
Location: Exosphere
Posts: 277
Default

Cheaper at the source: MCA204M
And you can change input connector to N if needed. You should probably call to make sure you get the newer black case models. Pricey but good quality.

They also have a 2 port if that's all you really need.

http://www.stridsberg.com/prod01.htm

Good guy to work with.
__________________
My nuclear button is much bigger than yours
Reply With Quote
  #5 (permalink)  
Old 06-12-2018, 4:50 AM
Member
   
Join Date: Sep 2006
Location: Stockholm, Sweden
Posts: 1,478
Default

If you believe you have plenty enough signal from the antenna for your normal monitoring you probably can take a 3.5dB hit and get a 1-2 splitter for $10. Maybe you can get those dB back if a RG6 coax are better than your current coax and you are into DX scanning, listening to fringe signals.

The Stridsberg splitter is way overpriced, but you get all in one nice box, and you get better performance at a much lower cost from a super lownoise antenna amplifier and a 1-6 tv/sat splitter.

/Ubbe
__________________
TRX-2 BCD536 HP1 BCT15 BC246 BC346 BR330 UBC3500 Pro2006 Pro2042 Optocom OS545 Scout PCR1000 ICR2500 IC75 DX394 AR8200 IC-R2 IC-R10 UBC780 MD380 CS580 CS750 Pro96 Perseus ADCR25 AcecoSC1plus RTL-SDR
Reply With Quote
Sponsored links
  #6 (permalink)  
Old 06-12-2018, 6:13 AM
Member
  Premium Subscriber
Premium Subscriber
 
Join Date: Dec 2002
Posts: 418
Default

Quote:
Originally Posted by Ubbe View Post
If you believe you have plenty enough signal from the antenna for your normal monitoring you probably can take a 3.5dB hit and get a 1-2 splitter for $10. Maybe you can get those dB back if a RG6 coax are better than your current coax and you are into DX scanning, listening to fringe signals.

The Stridsberg splitter is way overpriced, but you get all in one nice box, and you get better performance at a much lower cost from a super lownoise antenna amplifier and a 1-6 tv/sat splitter.

/Ubbe
He should also be prepared to invest in notch filters if there are nearby transmitters (always use to notch FM broadcasts). Keep in mind that nearby transmitters can de-sense your reception without you actually hearing them. It often takes some tweaking with gain and filters to find the best configuration and that will be location specific.

Remember that reception is largely primarily dependent on the first amplifier stage (if it has enough gain). Gain without low noise figure generally is not going to help. If near enough a high power transmitter, there may be not much he can do short of an expensive narrow tuned cavity to satisfactorily improve reception of other weaker stations on nearby frequencies.
Reply With Quote
  #7 (permalink)  
Old 06-13-2018, 5:02 AM
scanman10's Avatar
Member
  Premium Subscriber
Premium Subscriber
Amateur Radio Operator
Amateur Radio
 
Join Date: Dec 2002
Location: S.E. Michigan
Posts: 165
Default

Thanks everyone! Appreciated!
__________________
73's
Tom - N8TXX
SDS100, IC-7300, BCD536HP, HP-1E, PSR-800, BC785D, BC780XLT, PRO-2006, PRO-32A, IC-2SRA
Reply With Quote
  #8 (permalink)  
Old Yesterday, 5:40 PM
trp2525's Avatar
Member
   
Join Date: Mar 2010
Posts: 844
Default

Quote:
Originally Posted by Ubbe View Post
If you believe you have plenty enough signal from the antenna for your normal monitoring you probably can take a 3.5dB hit and get a 1-2 splitter for $10...
Here's a quality 2-way splitter from Channel Master which covers 5-1002 MHz and sells for $6 (and as already mentioned above will cut each output by 3.5 dB): https://www.channelmaster.com/Antenn.../cm-3212hd.htm
Reply With Quote
  #9 (permalink)  
Old Today, 4:31 AM
Member
   
Join Date: Sep 2006
Location: Stockholm, Sweden
Posts: 1,478
Default

Quote:
Originally Posted by dlwtrunked View Post
Keep in mind that nearby transmitters can de-sense your reception without you actually hearing them.
So true! You never know if you have desense issues if you don't check it using a variable attenuator. And if you get an amplifier, even an active Stridsberg splitter, you should always get a variable attenuator to test both before and after the amplifier, adding attenuation, to see if reception improves.

Then you have to test if it's best to use that attenuation permanently or if you have to add some filters. A FM broadcast filter of good quality can never hurt. Some cheap ones might have too much attenuation at frequencies way from the FM broadcast band that could hurt you but in some cases, where people had not used a variable attenuator, it actually reduced the overall signal to a point where the scanner worked at it's best.

A scannerist should always have a variable attenuator in his toolbox. You do not know what you are up against without it and perhaps you try to increase the signal level when you instead should have reduced it. 99% of the antenna amplifiers out there will enhance reception if you dial in the gain properly, but most people just connect it and get overload and de-sense issues and says that antenna amplifiers doesn't work and you should instead get super low loss coax at ten times the cost, which is totally unneccesary.

https://www.amazon.com/Electrovision...dp/B000LB0QC0/
https://www.amazon.com/Konig-Variabl...dp/B002KD7OPE/

/Ubbe
__________________
TRX-2 BCD536 HP1 BCT15 BC246 BC346 BR330 UBC3500 Pro2006 Pro2042 Optocom OS545 Scout PCR1000 ICR2500 IC75 DX394 AR8200 IC-R2 IC-R10 UBC780 MD380 CS580 CS750 Pro96 Perseus ADCR25 AcecoSC1plus RTL-SDR
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 8:53 AM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
All information here is Copyright 2012 by RadioReference.com LLC and Lindsay C. Blanton III.Ad Management by RedTyger
Copyright 2015 by RadioReference.com LLC Privacy Policy  |  Terms and Conditions